diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-12 17:51:56 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-12 17:51:56 +0100 |
| commit | 42cf0f203e877cc7e502883d43b3f72149033d86 (patch) | |
| tree | 3658297d62f28d7bfaa148099b08001aa9904229 | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egt... (diff) | |
| parent | Merge branch 'devel-stable' into for-next (diff) | |
| download | linux-42cf0f203e877cc7e502883d43b3f72149033d86.tar.xz linux-42cf0f203e877cc7e502883d43b3f72149033d86.zip | |
Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM updates from Russell King:
- clang assembly fixes from Ard
- optimisations and cleanups for Aurora L2 cache support
- efficient L2 cache support for secure monitor API on Exynos SoCs
- debug menu cleanup from Daniel Thompson to allow better behaviour for
multiplatform kernels
- StrongARM SA11x0 conversion to irq domains, and pxa_timer
- kprobes updates for older ARM CPUs
- move probes support out of arch/arm/kernel to arch/arm/probes
- add inline asm support for the rbit (reverse bits) instruction
- provide an ARM mode secondary CPU entry point (for Qualcomm CPUs)
- remove the unused ARMv3 user access code
- add driver_override support to AMBA Primecell bus
* 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (55 commits)
ARM: 8256/1: driver coamba: add device binding path 'driver_override'
ARM: 8301/1: qcom: Use secondary_startup_arm()
ARM: 8302/1: Add a secondary_startup that assumes ARM mode
ARM: 8300/1: teach __asmeq that r11 == fp and r12 == ip
ARM: kprobes: Fix compilation error caused by superfluous '*'
ARM: 8297/1: cache-l2x0: optimize aurora range operations
ARM: 8296/1: cache-l2x0: clean up aurora cache handling
ARM: 8284/1: sa1100: clear RCSR_SMR on resume
ARM: 8283/1: sa1100: collie: clear PWER register on machine init
ARM: 8282/1: sa1100: use handle_domain_irq
ARM: 8281/1: sa1100: move GPIO-related IRQ code to gpio driver
ARM: 8280/1: sa1100: switch to irq_domain_add_simple()
ARM: 8279/1: sa1100: merge both GPIO irqdomains
ARM: 8278/1: sa1100: split irq handling for low GPIOs
ARM: 8291/1: replace magic number with PAGE_SHIFT macro in fixup_pv code
ARM: 8290/1: decompressor: fix a wrong comment
ARM: 8286/1: mm: Fix dma_contiguous_reserve comment
ARM: 8248/1: pm: remove outdated comment
ARM: 8274/1: Fix DEBUG_LL for multi-platform kernels (without PL01X)
ARM: 8273/1: Seperate DEBUG_UART_PHYS from DEBUG_LL on EP93XX
...
91 files changed, 2187 insertions, 1478 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-amba b/Documentation/ABI/testing/sysfs-bus-amba new file mode 100644 index 000000000000..e7b54677cfbe --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-amba @@ -0,0 +1,20 @@ +What: /sys/bus/amba/devices/.../driver_override +Date: September 2014 +Contact: Antonios Motakis <a.motakis@virtualopensystems.com> +Description: + This file allows the driver for a device to be specified which + will override standard OF, ACPI, ID table, and name matching. + When specified, only a driver with a name matching the value + written to driver_override will have an opportunity to bind to + the device. The override is specified by writing a string to the + driver_override file (echo vfio-amba > driver_override) and may + be cleared with an empty string (echo > driver_override). + This returns the device to standard matching rules binding. + Writing to driver_override does not automatically unbind the + device from its current driver or make any attempt to + automatically load the specified driver. If no driver with a + matching name is currently loaded in the kernel, the device will + not bind to any driver. This also allows devices to opt-out of + driver binding using a driver_override name such as "none". + Only a single driver may be specified in the override, there is + no support for parsing delimiters. diff --git a/Documentation/devicetree/bindings/arm/l2cc.txt b/Documentation/devicetree/bindings/arm/l2cc.txt index 292ef7ca3058..0dbabe9a6b0a 100644 --- a/Documentation/devicetree/bindings/arm/l2cc.txt +++ b/Documentation/devicetree/bindings/arm/l2cc.txt @@ -57,6 +57,16 @@ Optional properties: - cache-id-part: cache id part number to be used if it is not present on hardware - wt-override: If present then L2 is forced to Write through mode +- arm,double-linefill : Override double linefill enable setting. Enable if + non-zero, disable if zero. +- arm,double-linefill-incr : Override double linefill on INCR read. Enable + if non-zero, disable if zero. +- arm,double-linefill-wrap : Override double linefill on WRAP read. Enable + if non-zero, disable if zero. +- arm,prefetch-drop : Override prefetch drop enable setting. Enable if non-zero, + disable if zero. +- arm,prefetch-offset : Override prefetch offset value. Valid values are + 0-7, 15, 23, and 31. Example: diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index dcb2e0c55be4..0850fc0f9658 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -29,6 +29,7 @@ config ARM select HANDLE_DOMAIN_IRQ select HARDIRQS_SW_RESEND select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT) + select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6 select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL select HAVE_ARCH_KGDB select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT) @@ -60,6 +61,7 @@ config ARM select HAVE_MEMBLOCK select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND select HAVE_OPROFILE if (HAVE_PERF_EVENTS) + select HAVE_OPTPROBES if !THUMB2_KERNEL select HAVE_PERF_EVENTS select HAVE_PERF_REGS select HAVE_PERF_USER_STACK_DUMP diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 5ddd4906f7a7..a324ecdfeb21 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -397,6 +397,13 @@ choice Say Y here if you want the debug print routines to direct their output to UART1 serial port on KEYSTONE2 devices. + config DEBUG_KS8695_UART + bool "KS8695 Debug UART" + depends on ARCH_KS8695 + help + Say Y here if you want kernel low-level debugging support + on KS8695. + config DEBUG_MESON_UARTAO bool "Kernel low-level debugging via Meson6 UARTAO" depends on ARCH_MESON @@ -496,6 +503,13 @@ choice Say Y here if you want kernel low-level debugging support on Vybrid based platforms. + config DEBUG_NETX_UART + bool "Kernel low-level debugging messages via NetX UART" + depends on ARCH_NETX + help + Say Y here if you want kernel low-level debugging support + on Hilscher NetX based platforms. + config DEBUG_NOMADIK_UART bool "Kernel low-level debugging messages via NOMADIK UART" depends on ARCH_NOMADIK @@ -520,6 +534,30 @@ choice Say Y here if you want kernel low-level debugging support on TI-NSPIRE CX models. + config DEBUG_OMAP1UART1 + bool "Kernel low-level debugging via OMAP1 UART1" + depends on ARCH_OMAP1 + select DEBUG_UART_8250 + help + Say Y here if you want kernel low-level debugging support + on OMAP1 based platforms (except OMAP730) on the UART1. + + config DEBUG_OMAP1UART2 + bool "Kernel low-level debugging via OMAP1 UART2" + depends on ARCH_OMAP1 + select DEBUG_UART_8250 + help + Say Y here if you want kernel low-level debugging support + on OMAP1 based platforms (except OMAP730) on the UART2. + + config DEBUG_OMAP1UART3 + bool "Kernel low-level debugging via OMAP1 UART3" + depends on ARCH_OMAP1 + select DEBUG_UART_8250 + help + Say Y here if you want kernel low-level debugging support + on OMAP1 based platforms (except OMAP730) on the UART3. + config DEBUG_OMAP2UART1 bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)" depends on ARCH_OMAP2PLUS @@ -562,6 +600,30 @@ choice depends on ARCH_OMAP2PLUS select DEBUG_OMAP2PLUS_UART + config DEBUG_OMAP7XXUART1 + bool "Kernel low-level debugging via OMAP730 UART1" + depends on ARCH_OMAP730 + select DEBUG_UART_8250 + help + Say Y here if you want kernel low-level debugging support + on OMAP730 based platforms on the UART1. + + config DEBUG_OMAP7XXUART2 + bool "Kernel low-level debugging via OMAP730 UART2" + depends on ARCH_OMAP730 + select DEBUG_UART_8250 + help + Say Y here if you want kernel low-level debugging support + on OMAP730 based platforms on the UART2. + + config DEBUG_OMAP7XXUART3 + bool "Kernel low-level debugging via OMAP730 UART3" + depends on ARCH_OMAP730 + select DEBUG_UART_8250 + help + Say Y here if you want kernel low-level debugging support + on OMAP730 based platforms on the UART3. + config DEBUG_TI81XXUART1 bool "Kernel low-level debugging messages via TI81XX UART1 (ti8148evm)" depends on ARCH_OMAP2PLUS @@ -1031,15 +1093,6 @@ choice This option selects UART0 on VIA/Wondermedia System-on-a-chip devices, including VT8500, WM8505, WM8650 and WM8850. - config DEBUG_LL_UART_NONE - bool "No low-level debugging UART" - depends on !ARCH_MULTIPLATFORM - help - Say Y here if your platform doesn't provide a UART option - above. This relies on your platform choosing the right UART - definition internally in order for low-level debugging to - work. - config DEBUG_ICEDCC bool "Kernel low-level debugging via EmbeddedICE DCC channel" help @@ -1183,7 +1236,9 @@ config DEBUG_LL_INCLUDE DEBUG_IMX6Q_UART || \ DEBUG_IMX6SL_UART || \ DEBUG_IMX6SX_UART + default "debug/ks8695.S" if DEBUG_KS8695_UART default "debug/msm.S" if DEBUG_MSM_UART || DEBUG_QCOM_UARTDM + default "debug/netx.S" if DEBUG_NETX_UART default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART default "debug/renesas-scif.S" if DEBUG_R7S72100_SCIF2 default "debug/renesas-scif.S" if DEBUG_RCAR_GEN1_SCIF0 @@ -1208,12 +1263,7 @@ config DEBUG_LL_INCLUDE # Compatibility options for PL01x config DEBUG_UART_PL01X - def_bool ARCH_EP93XX || \ - ARCH_INTEGRATOR || \ - ARCH_SPEAR3XX || \ - ARCH_SPEAR6XX || \ - ARCH_SPEAR13XX || \ - ARCH_VERSATILE + bool # Compatibility options for 8250 config DEBUG_UART_8250 @@ -1229,6 +1279,7 @@ config DEBUG_UART_BCM63XX config DEBUG_UART_PHYS hex "Physical base address of debug UART" + default 0x00100a00 if DEBUG_NETX_UART default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0 default 0x01c28000 if DEBUG_SUNXI_UART0 default 0x01c28400 if DEBUG_SUNXI_UART1 @@ -1269,7 +1320,6 @@ config DEBUG_UART_PHYS DEBUG_S3C2410_UART2) default 0x78000000 if DEBUG_CNS3XXX default 0x7c0003f8 if FOOTBRIDGE - default 0x78000000 if DEBUG_CNS3XXX default 0x80010000 if DEBUG_ASM9260_UART default 0x80070000 if DEBUG_IMX23_UART default 0x80074000 if DEBUG_IMX28_UART @@ -1310,12 +1360,17 @@ config DEBUG_UART_PHYS default 0xffe40000 if DEBUG_RCAR_GEN1_SCIF0 default 0xffe42000 if DEBUG_RCAR_GEN1_SCIF2 default 0xfff36000 if DEBUG_HIGHBANK_UART + default 0xfffb0000 if DEBUG_OMAP1UART1 || DEBUG_OMAP7XXUART1 + default 0xfffb0800 if DEBUG_OMAP1UART2 || DEBUG_OMAP7XXUART2 + default 0xfffb9800 if DEBUG_OMAP1UART3 || DEBUG_OMAP7XXUART3 default 0xfffe8600 if DEBUG_UART_BCM63XX default 0xfffff700 if ARCH_IOP33X - depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \ + depends on ARCH_EP93XX || \ + DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \ DEBUG_LL_UART_EFM32 || \ DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_MESON_UARTAO || \ - DEBUG_MSM_UART || DEBUG_QCOM_UARTDM || DEBUG_R7S72100_SCIF2 || \ + DEBUG_MSM_UART || DEBUG_NETX_UART || \ + DEBUG_QCOM_UARTDM || DEBUG_R7S72100_SCIF2 || \ DEBUG_RCAR_GEN1_SCIF0 || DEBUG_RCAR_GEN1_SCIF2 || \ DEBUG_RCAR_GEN2_SCIF0 || DEBUG_RCAR_GEN2_SCIF2 || \ DEBUG_RMOBILE_SCIFA0 || DEBUG_RMOBILE_SCIFA1 || \ @@ -1324,6 +1379,7 @@ config DEBUG_UART_PHYS config DEBUG_UART_VIRT hex "Virtual base address of debug UART" + default 0xe0000a00 if DEBUG_NETX_UART default 0xe0010fe0 if ARCH_RPC default 0xe1000000 if DEBUG_MSM_UART default 0xf0000be0 if ARCH_EBSA110 @@ -1392,18 +1448,23 @@ config DEBUG_UART_VIRT default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN default 0xfef36000 if DEBUG_HIGHBANK_UART + default 0xfefb0000 if DEBUG_OMAP1UART1 || DEBUG_OMAP7XXUART1 + default 0xfefb0800 if DEBUG_OMAP1UART2 || DEBUG_OMAP7XXUART2 + default 0xfefb9800 if DEBUG_OMAP1UART3 || DEBUG_OMAP7XXUART3 default 0xfefff700 if ARCH_IOP33X default 0xff003000 if DEBUG_U300_UART default DEBUG_UART_PHYS if !MMU depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \ DEBUG_UART_8250 || DEBUG_UART_PL01X || DEBUG_MESON_UARTAO || \ - DEBUG_MSM_UART || DEBUG_QCOM_UARTDM || DEBUG_S3C24XX_UART || \ + DEBUG_MSM_UART || DEBUG_NETX_UART || \ + DEBUG_QCOM_UARTDM || DEBUG_S3C24XX_UART || \ DEBUG_UART_BCM63XX || DEBUG_ASM9260_UART config DEBUG_UART_8250_SHIFT int "Register offset shift for the 8250 debug UART" depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250 - default 0 if FOOTBRIDGE || ARCH_IOP32X || DEBUG_BCM_5301X + default 0 if FOOTBRIDGE || ARCH_IOP32X || DEBUG_BCM_5301X || \ + DEBUG_OMAP7XXUART1 || DEBUG_OMAP7XXUART2 || DEBUG_OMAP7XXUART3 default 2 config DEBUG_UART_8250_WORD diff --git a/arch/arm/Makefile b/arch/arm/Makefile index c1785eec2cf7..7f99cd652203 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -266,6 +266,7 @@ core-$(CONFIG_KVM_ARM_HOST) += arch/arm/kvm/ # If we have a machine-specific directory, then include it in the build. core-y += arch/arm/kernel/ arch/arm/mm/ arch/arm/common/ +core-y += arch/arm/probes/ core-y += arch/arm/net/ core-y += arch/arm/crypto/ core-y += arch/arm/firmware/ diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 132c70e2d2f1..c41a793b519c 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -178,7 +178,7 @@ not_angel: /* * Set up a page table only if it won't overwrite ourself. - * That means r4 < pc && r4 - 16k page directory > &_end. + * That means r4 < pc || r4 - 16k page directory > &_end. * Given that r4 > &_end is most unfrequent, we add a rough * additional 1MB of room for a possible appended DTB. */ diff --git a/arch/arm/boot/dts/exynos4210.dtsi b/arch/arm/boot/dts/exynos4210.dtsi index bcc9e63c8070..8e45ea44317e 100644 --- a/arch/arm/boot/dts/exynos4210.dtsi +++ b/arch/arm/boot/dts/exynos4210.dtsi @@ -81,6 +81,15 @@ reg = <0x10023CA0 0x20>; }; + l2c: l2-cache-controller@10502000 { + compatible = "arm,pl310-cache"; + reg = <0x10502000 0x1000>; + cache-unified; + cache-level = <2>; + arm,tag-latency = <2 2 1>; + arm,data-latency = <2 2 1>; + }; + gic: interrupt-controller@10490000 { cpu-offset = <0x8000>; }; diff --git a/arch/arm/boot/dts/exynos4x12.dtsi b/arch/arm/boot/dts/exynos4x12.dtsi index 93b70402e943..8bc97c415c9a 100644 --- a/arch/arm/boot/dts/exynos4x12.dtsi +++ b/arch/arm/boot/dts/exynos4x12.dtsi @@ -54,6 +54,20 @@ reg = <0x10023CA0 0x20>; }; + l2c: l2-cache-controller@10502000 { + compatible = "arm,pl310-cache"; + reg = <0x10502000 0x1000>; + cache-unified; + cache-level = <2>; + arm,tag-latency = <2 2 1>; + arm,data-latency = <3 2 1>; + arm,double-linefill = <1>; + arm,double-linefill-incr = <0>; + arm,double-linefill-wrap = <1>; + arm,prefetch-drop = <1>; + arm,prefetch-offset = <7>; + }; + clock: clock-controller@10030000 { compatible = "samsung,exynos4412-clock"; reg = <0x10030000 0x20000>; diff --git a/arch/arm/configs/iop32x_defconfig b/arch/arm/configs/iop32x_defconfig index 4f2ec3ac138e..c3058da631da 100644 --- a/arch/arm/configs/iop32x_defconfig +++ b/arch/arm/configs/iop32x_defconfig @@ -106,6 +106,7 @@ CONFIG_MAGIC_SYSRQ=y CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_USER=y CONFIG_DEBUG_LL=y +CONFIG_DEBUG_LL_UART_8250=y CONFIG_KEYS=y CONFIG_KEYS_DEBUG_PROC_KEYS=y CONFIG_CRYPTO_NULL=y diff --git a/arch/arm/configs/iop33x_defconfig b/arch/arm/configs/iop33x_defconfig index aa36128abca2..713faeee8cf4 100644 --- a/arch/arm/configs/iop33x_defconfig +++ b/arch/arm/configs/iop33x_defconfig @@ -87,5 +87,6 @@ CONFIG_DEBUG_KERNEL=y # CONFIG_RCU_CPU_STALL_DETECTOR is not set CONFIG_DEBUG_USER=y CONFIG_DEBUG_LL=y +CONFIG_DEBUG_LL_UART_8250=y # CONFIG_CRYPTO_ANSI_CPRNG is not set # CONFIG_CRC32 is not set diff --git a/arch/arm/configs/ixp4xx_defconfig b/arch/arm/configs/ixp4xx_defconfig index 1af665e847d1..24636cfdf6df 100644 --- a/arch/arm/configs/ixp4xx_defconfig +++ b/arch/arm/configs/ixp4xx_defconfig @@ -202,3 +202,4 @@ CONFIG_MAGIC_SYSRQ=y CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_ERRORS=y CONFIG_DEBUG_LL=y +CONFIG_DEBUG_LL_UART_8250=y diff --git a/arch/arm/configs/lpc32xx_defconfig b/arch/arm/configs/lpc32xx_defconfig index 9f56ca3985ae..c100b7df5441 100644 --- a/arch/arm/configs/lpc32xx_defconfig +++ b/arch/arm/configs/lpc32xx_defconfig @@ -204,6 +204,7 @@ CONFIG_DEBUG_INFO=y # CONFIG_FTRACE is not set # CONFIG_ARM_UNWIND is not set CONFIG_DEBUG_LL=y +CONFIG_DEBUG_LL_UART_8250=y CONFIG_EARLY_PRINTK=y CONFIG_CRYPTO_ANSI_CPRNG=y # CONFIG_CRYPTO_HW is not set diff --git a/arch/arm/configs/mv78xx0_defconfig b/arch/arm/configs/mv78xx0_defconfig index 0dae1c1f007a..85d10d2e3d66 100644 --- a/arch/arm/configs/mv78xx0_defconfig +++ b/arch/arm/configs/mv78xx0_defconfig @@ -132,6 +132,7 @@ CONFIG_SYSCTL_SYSCALL_CHECK=y CONFIG_DEBUG_USER=y CONFIG_DEBUG_ERRORS=y CONFIG_DEBUG_LL=y +CONFIG_DEBUG_LL_UART_8250=y CONFIG_CRYPTO_CBC=m CONFIG_CRYPTO_ECB=m CONFIG_CRYPTO_PCBC=m diff --git a/arch/arm/configs/orion5x_defconfig b/arch/arm/configs/orion5x_defconfig index 952430d9e2d9..855143fac6bd 100644 --- a/arch/arm/configs/orion5x_defconfig +++ b/arch/arm/configs/orion5x_defconfig @@ -156,6 +156,7 @@ CONFIG_LATENCYTOP=y # CONFIG_FTRACE is not set CONFIG_DEBUG_USER=y CONFIG_DEBUG_LL=y +CONFIG_DEBUG_LL_UART_8250=y CONFIG_CRYPTO_CBC=m CONFIG_CRYPTO_ECB=m CONFIG_CRYPTO_PCBC=m diff --git a/arch/arm/configs/rpc_defconfig b/arch/arm/configs/rpc_defconfig index 00515ef9782d..89631795a915 100644 --- a/arch/arm/configs/rpc_defconfig +++ b/arch/arm/configs/rpc_defconfig @@ -131,3 +131,4 @@ CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_USER=y CONFIG_DEBUG_ERRORS=y CONFIG_DEBUG_LL=y +CONFIG_DEBUG_LL_UART_8250=y diff --git a/arch/arm/include/asm/bitrev.h b/arch/arm/include/asm/bitrev.h new file mode 100644 index 000000000000..ec291c350ea3 --- /dev/null +++ b/arch/arm/include/asm/bitrev.h @@ -0,0 +1,20 @@ +#ifndef __ASM_BITREV_H +#define __ASM_BITREV_H + +static __always_inline __attribute_const__ u32 __arch_bitrev32(u32 x) +{ + __asm__ ("rbit %0, %1" : "=r" (x) : "r" (x)); + return x; +} + +static __always_inline __attribute_const__ u16 __arch_bitrev16(u16 x) +{ + return __arch_bitrev32((u32)x) >> 16; +} + +static __always_inline __attribute_const__ u8 __arch_bitrev8(u8 x) +{ + return __arch_bitrev32((u32)x) >> 24; +} + +#endif diff --git a/arch/arm/include/asm/compiler.h b/arch/arm/include/asm/compiler.h index 8155db2f7fa1..29fe85e59439 100644 --- a/arch/arm/include/asm/compiler.h +++ b/arch/arm/include/asm/compiler.h @@ -8,8 +8,21 @@ * This string is meant to be concatenated with the inline asm string and * will cause compilation to stop on mismatch. * (for details, see gcc PR 15089) + * For compatibility with clang, we have to specifically take the equivalence + * of 'r11' <-> 'fp' and 'r12' <-> 'ip' into account as well. */ -#define __asmeq(x, y) ".ifnc " x "," y " ; .err ; .endif\n\t" +#define __asmeq(x, y) \ + ".ifnc " x "," y "; " \ + ".ifnc " x y ",fpr11; " \ + ".ifnc " x y ",r11fp; " \ + ".ifnc " x y ",ipr12; " \ + ".ifnc " x y ",r12ip; " \ + ".err; " \ + ".endif; " \ + ".endif; " \ + ".endif; " \ + ".endif; " \ + ".endif\n\t" #endif /* __ASM_ARM_COMPILER_H */ diff --git a/arch/arm/kernel/insn.h b/arch/arm/include/asm/insn.h index e96065da4dae..e96065da4dae 100644 --- a/arch/arm/kernel/insn.h +++ b/arch/arm/include/asm/insn.h diff --git a/arch/arm/include/asm/kprobes.h b/arch/arm/include/asm/kprobes.h index 49fa0dfaad33..3ea9be559726 100644 --- a/arch/arm/include/asm/kprobes.h +++ b/arch/arm/include/asm/kprobes.h @@ -22,7 +22,6 @@ #define __ARCH_WANT_KPROBES_INSN_SLOT #define MAX_INSN_SIZE 2 -#define MAX_STACK_SIZE 64 /* 32 would probably be OK */ #define flush_insn_slot(p) do { } while (0) #define kretprobe_blacklist_size 0 @@ -51,5 +50,37 @@ int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr); int kprobe_exceptions_notify(struct notifier_block *self, unsigned long val, void *data); +/* optinsn template addresses */ +extern __visible kprobe_opcode_t optprobe_template_entry; +extern __visible kprobe_opcode_t optprobe_template_val; +extern __visible kprobe_opcode_t optprobe_template_call; +extern __visible kprobe_opcode_t optprobe_template_end; +extern __visible kprobe_opcode_t optprobe_template_sub_sp; +extern __visible kprobe_opcode_t optprobe_template_add_sp; +extern __visible kprobe_opcode_t optprobe_template_restore_begin; +extern __visible kprobe_opcode_t optprobe_template_restore_orig_insn; +extern __visible kprobe_opcode_t optprobe_template_restore_end; + +#define MAX_OPTIMIZED_LENGTH 4 +#define MAX_OPTINSN_SIZE \ + ((unsigned long)&optprobe_template_end - \ + (unsigned long)&optprobe_template_entry) +#define RELATIVEJUMP_SIZE 4 + +struct arch_optimized_insn { + /* + * copy of the original instructions. + * Different from x86, ARM kprobe_opcode_t is u32. + */ +#define MAX_COPIED_INSN DIV_ROUND_UP(RELATIVEJUMP_SIZE, sizeof(kprobe_opcode_t)) + kprobe_opcode_t copied_insn[MAX_COPIED_INSN]; + /* detour code buffer */ + kprobe_opcode_t *insn; + /* + * We always copy one instruction on ARM, + * so size will always be 4, and unlike x86, there is no + * need for a size field. + */ +}; #endif /* _ARM_KPROBES_H */ diff --git a/arch/arm/include/asm/outercache.h b/arch/arm/include/asm/outercache.h index 891a56b35bcf..563b92fc2f41 100644 --- a/arch/arm/include/asm/outercache.h +++ b/arch/arm/include/asm/outercache.h @@ -23,6 +23,8 @@ #include <linux/types.h> +struct l2x0_regs; + struct outer_cache_fns { void (*inv_range)(unsigned long, unsigned long); void (*clean_range)(unsigned long, unsigned long); @@ -36,6 +38,7 @@ struct outer_cache_fns { /* This is an ARM L2C thing */ void (*write_sec)(unsigned long, unsigned); + void (*configure)(const struct l2x0_regs *); }; extern struct outer_cache_fns outer_cache; diff --git a/arch/arm/kernel/patch.h b/arch/arm/include/asm/patch.h index 77e054c2f6cd..77e054c2f6cd 100644 --- a/arch/arm/kernel/patch.h +++ b/arch/arm/include/asm/patch.h diff --git a/arch/arm/include/asm/probes.h b/arch/arm/include/asm/probes.h index 806cfe622a9e..1e5b9bb92270 100644 --- a/arch/arm/include/asm/probes.h +++ b/arch/arm/include/asm/probes.h @@ -19,6 +19,8 @@ #ifndef _ASM_PROBES_H #define _ASM_PROBES_H +#ifndef __ASSEMBLY__ + typedef u32 probes_opcode_t; struct arch_probes_insn; @@ -38,6 +40,19 @@ struct arch_probes_insn { probes_check_cc *insn_check_cc; probes_insn_singlestep_t *insn_singlestep; probes_insn_fn_t *insn_fn; + int stack_space; + unsigned long register_usage_flags; + bool kprobe_direct_exec; }; +#endif /* __ASSEMBLY__ */ + +/* + * We assume one instruction can consume at most 64 bytes stack, which is + * 'push {r0-r15}'. Instructions consume more or unknown stack space like + * 'str r0, [sp, #-80]' and 'str r0, [sp, r1]' should be prohibit to probe. + * Both kprobe and jprobe use this macro. + */ +#define MAX_STACK_SIZE 64 + #endif diff --git a/arch/arm/mach-ks8695/include/mach/debug-macro.S b/arch/arm/include/debug/ks8695.S index a79e48981202..961da1f32ab3 100644 --- a/arch/arm/mach-ks8695/include/mach/debug-macro.S +++ b/arch/arm/include/debug/ks8695.S @@ -1,5 +1,5 @@ /* - * arch/arm/mach-ks8695/include/mach/debug-macro.S + * arch/arm/include/debug/ks8695.S * * Copyright (C) 2006 Ben Dooks <ben@simtec.co.uk> * Copyright (C) 2006 Simtec Electronics @@ -11,8 +11,12 @@ * published by the Free Software Foundation. */ -#include <mach/hardware.h> -#include <mach/regs-uart.h> +#define KS8695_UART_PA 0x03ffe000 +#define KS8695_UART_VA 0xf00fe000 +#define KS8695_URTH (0x04) +#define KS8695_URLS (0x14) +#define URLS_URTE (1 << 6) +#define URLS_URTHRE (1 << 5) .macro addruart, rp, rv, tmp ldr \rp, =KS8695_UART_PA @ physical base address diff --git a/arch/arm/mach-netx/include/mach/debug-macro.S b/arch/arm/include/debug/netx.S index 247781e096e2..81e1b2af70f7 100644 --- a/arch/arm/mach-netx/include/mach/debug-macro.S +++ b/arch/arm/include/debug/netx.S @@ -1,5 +1,4 @@ -/* arch/arm/mach-netx/include/mach/debug-macro.S - * +/* * Debugging macro include header * * Copyright (C) 1994-1999 Russell King @@ -11,26 +10,27 @@ * */ -#include "hardware.h" +#define UART_DATA 0 +#define UART_FLAG 0x18 +#define UART_FLAG_BUSY (1 << 3) .macro addruart, rp, rv, tmp - mov \rp, #0x00000a00 - orr \rv, \rp, #io_p2v(0x00100000) @ virtual - orr \rp, \rp, #0x00100000 @ physical + ldr \rp, =CONFIG_DEBUG_UART_PHYS + ldr \rv, =CONFIG_DEBUG_UART_VIRT .endm .macro senduart,rd,rx - str \rd, [\rx, #0] + str \rd, [\rx, #UART_DATA] .endm .macro busyuart,rd,rx -1002: ldr \rd, [\rx, #0x18] - tst \rd, #(1 << 3) +1002: ldr \rd, [\rx, #UART_FLAG] + tst \rd, #UART_FLAG_BUSY bne 1002b .endm .macro waituart,rd,rx -1001: ldr \rd, [\rx, #0x18] - tst \rd, #(1 << 3) +1001: ldr \rd, [\rx, #UART_FLAG] + tst \rd, #UART_FLAG_BUSY bne 1001b .endm diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index fb2b71ebe3f2..902397dd1000 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -51,20 +51,8 @@ obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o insn.o obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o insn.o obj-$(CONFIG_JUMP_LABEL) += jump_label.o insn.o patch.o obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o -obj-$(CONFIG_UPROBES) += probes.o probes-arm.o uprobes.o uprobes-arm.o -obj-$(CONFIG_KPROBES) += probes.o kprobes.o kprobes-common.o patch.o -ifdef CONFIG_THUMB2_KERNEL -obj-$(CONFIG_KPROBES) += kprobes-thumb.o probes-thumb.o -else -obj-$(CONFIG_KPROBES) += kprobes-arm.o probes-arm.o -endif -obj-$(CONFIG_ARM_KPROBES_TEST) += test-kprobes.o -test-kprobes-objs := kprobes-test.o -ifdef CONFIG_THUMB2_KERNEL -test-kprobes-objs += kprobes-test-thumb.o -else -test-kprobes-objs += kprobes-test-arm.o -endif +# Main staffs in KPROBES are in arch/arm/probes/ . +obj-$(CONFIG_KPROBES) += patch.o insn.o obj-$(CONFIG_OABI_COMPAT) += sys_oabi-compat.o obj-$(CONFIG_ARM_THUMBEE) += thumbee.o obj-$(CONFIG_KGDB) += kgdb.o patch.o diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 2f5555d307b3..672b21942fff 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -31,6 +31,7 @@ #include "entry-header.S" #include <asm/entry-macro-multi.S> +#include <asm/probes.h> /* * Interrupt handling. @@ -249,7 +250,7 @@ __und_svc: @ If a kprobe is about to simulate a "stmdb sp..." instruction, @ it obviously needs free stack space which then will belong to @ the saved context. - svc_entry 64 + svc_entry MAX_STACK_SIZE #else svc_entry #endif diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c index b8c75e45a950..709ee1d6d4df 100644 --- a/arch/arm/kernel/ftrace.c +++ b/arch/arm/kernel/ftrace.c @@ -20,8 +20,7 @@ #include <asm/cacheflush.h> #include <asm/opcodes.h> #include <asm/ftrace.h> - -#include "insn.h" +#include <asm/insn.h> #ifdef CONFIG_THUMB2_KERNEL #define NOP 0xf85deb04 /* pop.w {lr} */ diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S index 664eee8c4a26..01963273c07a 100644 --- a/arch/arm/kernel/head.S +++ b/arch/arm/kernel/head.S @@ -346,6 +346,12 @@ __turn_mmu_on_loc: #if defined(CONFIG_SMP) .text +ENTRY(secondary_startup_arm) + .arm + THUMB( adr r9, BSYM(1f) ) @ Kernel is entered in ARM. + THUMB( bx r9 ) @ If this is a Thumb-2 kernel, + THUMB( .thumb ) @ switch to Thumb now. + THUMB(1: ) ENTRY(secondary_startup) /* * Common entry point for secondary CPUs. @@ -385,6 +391,7 @@ ENTRY(secondary_startup) THUMB( add r12, r10, #PROCINFO_INITFUNC ) THUMB( ret r12 ) ENDPROC(secondary_startup) +ENDPROC(secondary_startup_arm) /* * r6 = &secondary_data @@ -586,7 +593,7 @@ __fixup_pv_table: add r5, r5, r3 @ adjust table end address add r6, r6, r3 @ adjust __pv_phys_pfn_offset address add r7, r7, r3 @ adjust __pv_offset address - mov r0, r8, lsr #12 @ convert to PFN + mov r0, r8, lsr #PAGE_SHIFT @ convert to PFN str r0, [r6] @ save computed PHYS_OFFSET to __pv_phys_pfn_offset strcc ip, [r7, #HIGH_OFFSET] @ save to __pv_offset high bits mov r6, r3, lsr #24 @ constant for add/sub instructions diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c index ad857bada96c..350f188c92d2 100644 --- a/arch/arm/kernel/irq.c +++ b/arch/arm/kernel/irq.c @@ -109,7 +109,8 @@ void __init init_IRQ(void) if (IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_CACHE_L2X0) && (machine_desc->l2c_aux_mask || machine_desc->l2c_aux_val)) { - outer_cache.write_sec = machine_desc->l2c_write_sec; + if (!outer_cache.write_sec) + outer_cache.write_sec = machine_desc->l2c_write_sec; ret = l2x0_of_init(machine_desc->l2c_aux_val, machine_desc->l2c_aux_mask); if (ret) diff --git a/arch/arm/kernel/jump_label.c b/arch/arm/kernel/jump_label.c index afeeb9ea6f43..e39cbf488cfe 100644 --- a/arch/arm/kernel/jump_label.c +++ b/arch/arm/kernel/jump_label.c @@ -1,8 +1,7 @@ #include <linux/kernel.h> #include <linux/jump_label.h> - -#include "insn.h" -#include "patch.h" +#include <asm/patch.h> +#include <asm/insn.h> #ifdef HAVE_JUMP_LABEL diff --git a/arch/arm/kernel/kgdb.c b/arch/arm/kernel/kgdb.c index 07db2f8a1b45..a6ad93c9bce3 100644 --- a/arch/arm/kernel/kgdb.c +++ b/arch/arm/kernel/kgdb.c @@ -14,10 +14,9 @@ #include <linux/kgdb.h> #include <linux/uaccess.h> +#include <asm/patch.h> #include <asm/traps.h> -#include "patch.h" - struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] = { { "r0", 4, offsetof(struct pt_regs, ARM_r0)}, diff --git a/arch/arm/kernel/patch.c b/arch/arm/kernel/patch.c index 5038960e3c55..69bda1a5707e 100644 --- a/arch/arm/kernel/patch.c +++ b/arch/arm/kernel/patch.c @@ -8,8 +8,7 @@ #include <asm/fixmap.h> #include <asm/smp_plat.h> #include <asm/opcodes.h> - -#include "patch.h" +#include <asm/patch.h> struct patch { void *addr; diff --git a/arch/arm/kernel/suspend.c b/arch/arm/kernel/suspend.c index 2835d35234ca..9a2f882a0a2d 100644 --- a/arch/arm/kernel/suspend.c +++ b/arch/arm/kernel/suspend.c @@ -14,10 +14,6 @@ extern int __cpu_suspend(unsigned long, int (*)(unsigned long), u32 cpuid); extern void cpu_resume_mmu(void); #ifdef CONFIG_MMU -/* - * Hide the first two arguments to __cpu_suspend - these are an implementation - * detail which platform code shouldn't have to know about. - */ int cpu_suspend(unsigned long arg, int (*fn)(unsigned long)) { struct mm_struct *mm = current->active_mm; diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index 0573faab96ad..d8a780799506 100644 --- a/arch/arm/lib/Makefile +++ b/arch/arm/lib/Makefile @@ -15,19 +15,8 @@ lib-y := backtrace.o changebit.o csumipv6.o csumpartial.o \ io-readsb.o io-writesb.o io-readsl.o io-writesl.o \ call_with_stack.o bswapsdi2.o -mmu-y := clear_user.o copy_page.o getuser.o putuser.o - -# the code in uaccess.S is not preemption safe and -# probably faster on ARMv3 only -ifeq ($(CONFIG_PREEMPT),y) - mmu-y += copy_from_user.o copy_to_user.o -else -ifneq ($(CONFIG_CPU_32v3),y) - mmu-y += copy_from_user.o copy_to_user.o -else - mmu-y += uaccess.o -endif -endif +mmu-y := clear_user.o copy_page.o getuser.o putuser.o \ + copy_from_user.o copy_to_user.o # using lib_ here won't override already available weak symbols obj-$(CONFIG_UACCESS_WITH_MEMCPY) += uaccess_with_memcpy.o diff --git a/arch/arm/lib/uaccess.S b/arch/arm/lib/uaccess.S deleted file mode 100644 index e50520904b76..000000000000 --- a/arch/arm/lib/uaccess.S +++ /dev/null @@ -1,564 +0,0 @@ -/* - * linux/arch/arm/lib/uaccess.S - * - * Copyright (C) 1995, 1996,1997,1998 Russell King - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Routines to block copy data to/from user memory - * These are highly optimised both for the 4k page size - * and for various alignments. - */ -#include <linux/linkage.h> -#include <asm/assembler.h> -#include <asm/errno.h> -#include <asm/domain.h> - - .text - -#define PAGE_SHIFT 12 - -/* Prototype: int __copy_to_user(void *to, const char *from, size_t n) - * Purpose : copy a block to user memory from kernel memory - * Params : to - user memory - * : from - kernel memory - * : n - number of bytes to copy - * Returns : Number of bytes NOT copied. - */ - -.Lc2u_dest_not_aligned: - rsb ip, ip, #4 - cmp ip, #2 - ldrb r3, [r1], #1 -USER( TUSER( strb) r3, [r0], #1) @ May fault - ldrgeb r3, [r1], #1 -USER( TUSER( strgeb) r3, [r0], #1) @ May fault - ldrgtb r3, [r1], #1 -USER( TUSER( strgtb) r3, [r0], #1) @ May fault - sub r2, r2, ip - b .Lc2u_dest_aligned - -ENTRY(__copy_to_user) - stmfd sp!, {r2, r4 - r7, lr} - cmp r2, #4 - blt .Lc2u_not_enough - ands ip, r0, #3 - bne .Lc2u_dest_not_aligned -.Lc2u_dest_aligned: - - ands ip, r1, #3 - bne .Lc2u_src_not_aligned -/* - * Seeing as there has to be at least 8 bytes to copy, we can - * copy one word, and force a user-mode page fault... - */ - -.Lc2u_0fupi: subs r2, r2, #4 - addmi ip, r2, #4 - bmi .Lc2u_0nowords - ldr r3, [r1], #4 -USER( TUSER( str) r3, [r0], #4) @ May fault - mov ip, r0, lsl #32 - PAGE_SHIFT @ On each page, use a ld/st??t instruction - rsb ip, ip, #0 - movs ip, ip, lsr #32 - PAGE_SHIFT - beq .Lc2u_0fupi -/* - * ip = max no. of bytes to copy before needing another "strt" insn - */ - cmp r2, ip - movlt ip, r2 - sub r2, r2, ip - subs ip, ip, #32 - blt .Lc2u_0rem8lp - -.Lc2u_0cpy8lp: ldmia r1!, {r3 - r6} - stmia r0!, {r3 - r6} @ Shouldnt fault - ldmia r1!, {r3 - r6} - subs ip, ip, #32 - stmia r0!, {r3 - r6} @ Shouldnt fault - bpl .Lc2u_0cpy8lp - -.Lc2u_0rem8lp: cmn ip, #16 - ldmgeia r1!, {r3 - r6} - stmgeia r0!, {r3 - r6} @ Shouldnt fault - tst ip, #8 - ldmneia r1!, {r3 - r4} - stmneia r0!, {r3 - r4} @ Shouldnt fault - tst ip, #4 - ldrne r3, [r1], #4 - TUSER( strne) r3, [r0], #4 @ Shouldnt fault - ands ip, ip, #3 - beq .Lc2u_0fupi -.Lc2u_0nowords: teq ip, #0 - beq .Lc2u_finished -.Lc2u_nowords: cmp ip, #2 - ldrb r3, [r1], #1 -USER( TUSER( strb) r3, [r0], #1) @ May fault - ldrgeb r3, [r1], #1 -USER( TUSER( strgeb) r3, [r0], #1) @ May fault - ldrgtb r3, [r1], #1 -USER( TUSER( strgtb) r3, [r0], #1) @ May fault - b .Lc2u_finished - -.Lc2u_not_enough: - movs ip, r2 - bne .Lc2u_nowords -.Lc2u_finished: mov r0, #0 - ldmfd sp!, {r2, r4 - r7, pc} - -.Lc2u_src_not_aligned: - bic r1, r1, #3 - ldr r7, [r1], #4 - cmp ip, #2 - bgt .Lc2u_3fupi - beq .Lc2u_2fupi -.Lc2u_1fupi: subs r2, r2, #4 - addmi ip, r2, #4 - bmi .Lc2u_1nowords - mov r3, r7, lspull #8 - ldr r7, [r1], #4 - orr r3, r3, r7, lspush #24 -USER( TUSER( str) r3, [r0], #4) @ May fault - mov ip, r0, lsl #32 - PAGE_SHIFT - rsb ip, ip, #0 - movs ip, ip, lsr #32 - PAGE_SHIFT - beq .Lc2u_1fupi - cmp r2, ip - movlt ip, r2 - sub r2, r2, ip - subs ip, ip, #16 - blt .Lc2u_1rem8lp - -.Lc2u_1cpy8lp: mov r3, r7, lspull #8 - ldmia r1!, {r4 - r7} - subs ip, ip, #16 - orr r3, r3, r4, lspush #24 - mov r4, r4, lspull #8 - orr r4, r4, r5, lspush #24 - mov r5, r5, lspull #8 - orr r5, r5, r6, lspush #24 - mov r6, r6, lspull #8 - orr r6, r6, r7, lspush #24 - stmia r0!, {r3 - r6} @ Shouldnt fault - bpl .Lc2u_1cpy8lp - -.Lc2u_1rem8lp: tst ip, #8 - movne r3, r7, lspull #8 - ldmneia r1!, {r4, r7} - orrne r3, r3, r4, lspush #24 - movne r4, r4, lspull #8 - orrne r4, r4, r7, lspush #24 - stmneia r0!, {r3 - r4} @ Shouldnt fault - tst ip, #4 - movne r3, r7, lspull #8 - ldrne r7, [r1], #4 - orrne r3, r3, r7, lspush #24 - TUSER( strne) r3, [r0], #4 @ Shouldnt fault - ands ip, ip, #3 - beq .Lc2u_1fupi -.Lc2u_1nowords: mov r3, r7, get_byte_1 - teq ip, #0 - beq .Lc2u_finished - cmp ip, #2 -USER( TUSER( strb) r3, [r0], #1) @ May fault - movge r3, r7, get_byte_2 -USER( TUSER( strgeb) r3, [r0], #1) @ May fault - movgt r3, r7, get_byte_3 -USER( TUSER( strgtb) r3, [r0], #1) @ May fault - b .Lc2u_finished - -.Lc2u_2fupi: subs r2, r2, #4 - addmi ip, r2, #4 - bmi .Lc2u_2nowords - mov r3, r7, lspull #16 - ldr r7, [r1], #4 - orr r3, r3, r7, lspush #16 -USER( TUSER( str) r3, [r0], #4) @ May fault - mov ip, r0, lsl #32 - PAGE_SHIFT - rsb ip, ip, #0 - movs ip, ip, lsr #32 - PAGE_SHIFT - beq .Lc2u_2fupi - cmp r2, ip - movlt ip, r2 - sub r2, r2, ip - subs ip, ip, #16 - blt .Lc2u_2rem8lp - -.Lc2u_2cpy8lp: mov r3, r7, lspull #16 - ldmia r1!, {r4 - r7} - subs ip, ip, #16 - orr r3, r3, r4, lspush #16 - mov r4, r4, lspull #16 - orr r4, r4, r5, lspush #16 - mov r5, r5, lspull #16 - orr r5, r5, r6, lspush #16 - mov r6, r6, lspull #16 - orr r6, r6, r7, lspush #16 - stmia r0!, {r3 - r6} @ Shouldnt fault - bpl .Lc2u_2cpy8lp - -.Lc2u_2rem8lp: tst ip, #8 - movne r3, r7, lspull #16 - ldmneia r1!, {r4, r7} - orrne r3, r3, r4, lspush #16 - movne r4, r4, lspull #16 - orrne r4, r4, r7, lspush #16 - stmneia r0!, {r3 - r4} @ Shouldnt fault - tst ip, #4 - movne r3, r7, lspull #16 - ldrne r7, [r1], #4 - orrne r3, r3, r7, lspush #16 - TUSER( strne) r3, [r0], #4 @ Shouldnt fault - ands ip, ip, #3 - beq .Lc2u_2fupi -.Lc2u_2nowords: mov r3, r7, get_byte_2 - teq ip, #0 - beq .Lc2u_finished - cmp ip, #2 -USER( TUSER( strb) r3, [r0], #1) @ May fault - movge r3, r7, get_byte_3 -USER( TUSER( strgeb) r3, [r0], #1) @ May fault - ldrgtb r3, [r1], #0 -USER( TUSER( strgtb) r3, [r0], #1) @ May fault - b .Lc2u_finished - -.Lc2u_3fupi: subs r2, r2, #4 - addmi ip, r2, #4 - bmi .Lc2u_3nowords - mov r3, r7, lspull #24 - ldr r7, [r1], #4 - orr r3, r3, r7, lspush #8 -USER( TUSER( str) r3, [r0], #4) @ May fault - mov ip, r0, lsl #32 - PAGE_SHIFT - rsb ip, ip, #0 - movs ip, ip, lsr #32 - PAGE_SHIFT - beq .Lc2u_3fupi - cmp r2, ip - movlt ip, r2 - sub r2, r2, ip - subs ip, ip, #16 - blt .Lc2u_3rem8lp - -.Lc2u_3cpy8lp: mov r3, r7, lspull #24 - ldmia r1!, {r4 - r7} - subs ip, ip, #16 - orr r3, r3, r4, lspush #8 - mov r4, r4, lspull #24 - orr r4, r4, r5, lspush #8 - mov r5, r5, lspull #24 - orr r5, r5, r6, lspush #8 - mov r6, r6, lspull #24 - orr r6, r6, r7, lspush #8 - stmia r0!, {r3 - r6} @ Shouldnt fault - bpl .Lc2u_3cpy8lp - -.Lc2u_3rem8lp: tst ip, #8 - movne r3, r7, lspull #24 - ldmneia r1!, {r4, r7} - orrne r3, r3, r4, lspush #8 - movne r4, r4, lspull #24 - orrne r4, r4, r7, lspush #8 - stmneia r0!, {r3 - r4} @ Shouldnt fault - tst ip, #4 - movne r3, r7, lspull #24 - ldrne r7, [r1], #4 - orrne r3, r3, r7, lspush #8 - TUSER( strne) r3, [r0], #4 @ Shouldnt fault - ands ip, ip, #3 - beq .Lc2u_3fupi -.Lc2u_3nowords: mov r3, r7, get_byte_3 - teq ip, #0 - beq .Lc2u_finished - cmp ip, #2 -USER( TUSER( strb) r3, [r0], #1) @ May fault - ldrgeb r3, [r1], #1 -USER( TUSER( strgeb) r3, [r0], #1) @ May fault - ldrgtb r3, [r1], #0 -USER( TUSER( strgtb) r3, [r0], #1) @ May fault - b .Lc2u_finished -ENDPROC(__copy_to_user) - - .pushsection .fixup,"ax" - .align 0 -9001: ldmfd sp!, {r0, r4 - r7, pc} - .popsection - -/* Prototype: unsigned long __copy_from_user(void *to,const void *from,unsigned long n); - * Purpose : copy a block from user memory to kernel memory - * Params : to - kernel memory - * : from - user memory - * : n - number of bytes to copy - * Returns : Number of bytes NOT copied. - */ -.Lcfu_dest_not_aligned: - rsb ip, ip, #4 - cmp ip, #2 -USER( TUSER( ldrb) r3, [r1], #1) @ May fault - strb r3, [r0], #1 -USER( TUSER( ldrgeb) r3, [r1], #1) @ May fault - strgeb r3, [r0], #1 -USER( TUSER( ldrgtb) r3, [r1], #1) @ May fault - strgtb r3, [r0], #1 - sub r2, r2, ip - b .Lcfu_dest_aligned - -ENTRY(__copy_from_user) - stmfd sp!, {r0, r2, r4 - r7, lr} - cmp r2, #4 - blt .Lcfu_not_enough - ands ip, r0, #3 - bne .Lcfu_dest_not_aligned -.Lcfu_dest_aligned: - ands ip, r1, #3 - bne .Lcfu_src_not_aligned - -/* - * Seeing as there has to be at least 8 bytes to copy, we can - * copy one word, and force a user-mode page fault... - */ - -.Lcfu_0fupi: subs r2, r2, #4 - addmi ip, r2, #4 - bmi .Lcfu_0nowords -USER( TUSER( ldr) r3, [r1], #4) - str r3, [r0], #4 - mov ip, r1, lsl #32 - PAGE_SHIFT @ On each page, use a ld/st??t instruction - rsb ip, ip, #0 - movs ip, ip, lsr #32 - PAGE_SHIFT - beq .Lcfu_0fupi -/* - * ip = max no. of bytes to copy before needing another "strt" insn - */ - cmp r2, ip - movlt ip, r2 - sub r2, r2, ip - subs ip, ip, #32 - blt .Lcfu_0rem8lp - -.Lcfu_0cpy8lp: ldmia r1!, {r3 - r6} @ Shouldnt fault - stmia r0!, {r3 - r6} - ldmia r1!, {r3 - r6} @ Shouldnt fault - subs ip, ip, #32 - stmia r0!, {r3 - r6} - bpl .Lcfu_0cpy8lp - -.Lcfu_0rem8lp: cmn ip, #16 - ldmgeia r1!, {r3 - r6} @ Shouldnt fault - stmgeia r0!, {r3 - r6} - tst ip, #8 - ldmneia r1!, {r3 - r4} @ Shouldnt fault - stmneia r0!, {r3 - r4} - tst ip, #4 - TUSER( ldrne) r3, [r1], #4 @ Shouldnt fault - strne r3, [r0], #4 - ands ip, ip, #3 - beq .Lcfu_0fupi -.Lcfu_0nowords: teq ip, #0 - beq .Lcfu_finished -.Lcfu_nowords: cmp ip, #2 -USER( TUSER( ldrb) r3, [r1], #1) @ May fault - strb r3, [r0], #1 -USER( TUSER( ldrgeb) r3, [r1], #1) @ May fault - strgeb r3, [r0], #1 -USER( TUSER( ldrgtb) r3, [r1], #1) @ May fault - strgtb r3, [r0], #1 - b .Lcfu_finished - -.Lcfu_not_enough: - movs ip, r2 - bne .Lcfu_nowords -.Lcfu_finished: mov r0, #0 - add sp, sp, #8 - ldmfd sp!, {r4 - r7, pc} - -.Lcfu_src_not_aligned: - bic r1, r1, #3 -USER( TUSER( ldr) r7, [r1], #4) @ May fault - cmp ip, #2 - bgt .Lcfu_3fupi - beq .Lcfu_2fupi -.Lcfu_1fupi: subs r2, r2, #4 - addmi ip, r2, #4 - bmi .Lcfu_1nowords - mov r3, r7, lspull #8 -USER( TUSER( ldr) r7, [r1], #4) @ May fault - orr r3, r3, r7, lspush #24 - str r3, [r0], #4 - mov ip, r1, lsl #32 - PAGE_SHIFT - rsb ip, ip, #0 - movs ip, ip, lsr #32 - PAGE_SHIFT - beq .Lcfu_1fupi - cmp r2, ip - movlt ip, r2 - sub r2, r2, ip - subs ip, ip, #16 - blt .Lcfu_1rem8lp - -.Lcfu_1cpy8lp: mov r3, r7, lspull #8 - ldmia r1!, {r4 - r7} @ Shouldnt fault - subs ip, ip, #16 - orr r3, r3, r4, lspush #24 - mov r4, r4, lspull #8 - orr r4, r4, r5, lspush #24 - mov r5, r5, lspull #8 - orr r5, r5, r6, lspush #24 - mov r6, r6, lspull #8 - orr r6, r6, r7, lspush #24 - stmia r0!, {r3 - r6} - bpl .Lcfu_1cpy8lp - -.Lcfu_1rem8lp: tst ip, #8 - movne r3, r7, lspull #8 - ldmneia r1!, {r4, r7} @ Shouldnt fault - orrne r3, r3, r4, lspush #24 - movne r4, r4, lspull #8 - orrne r4, r4, r7, lspush #24 - stmneia r0!, {r3 - r4} - tst ip, #4 - movne r3, r7, lspull #8 -USER( TUSER( ldrne) r7, [r1], #4) @ May fault - orrne r3, r3, r7, lspush #24 - strne r3, [r0], #4 - ands ip, ip, #3 - beq .Lcfu_1fupi -.Lcfu_1nowords: mov r3, r7, get_byte_1 - teq ip, #0 - beq .Lcfu_finished - cmp ip, #2 - strb r3, [r0], #1 - movge r3, r7, get_byte_2 - strgeb r3, [r0], #1 - movgt r3, r7, get_byte_3 - strgtb r3, [r0], #1 - b .Lcfu_finished - -.Lcfu_2fupi: subs r2, r2, #4 - addmi ip, r2, #4 - bmi .Lcfu_2nowords - mov r3, r7, lspull #16 -USER( TUSER( ldr) r7, [r1], #4) @ May fault - orr r3, r3, r7, lspush #16 - str r3, [r0], #4 - mov ip, r1, lsl #32 - PAGE_SHIFT - rsb ip, ip, #0 - movs ip, ip, lsr #32 - PAGE_SHIFT - beq .Lcfu_2fupi - cmp r2, ip - movlt ip, r2 - sub r2, r2, ip - subs ip, ip, #16 - blt .Lcfu_2rem8lp - - -.Lcfu_2cpy8lp: mov r3, r7, lspull #16 - ldmia r1!, {r4 - r7} @ Shouldnt fault - subs ip, ip, #16 - orr r3, r3, r4, lspush #16 - mov r4, r4, lspull #16 - orr r4, r4, r5, lspush #16 - mov r5, r5, lspull #16 - orr r5, r5, r6, lspush #16 - mov r6, r6, lspull #16 - orr r6, r6, r7, lspush #16 - stmia r0!, {r3 - r6} - bpl .Lcfu_2cpy8lp - -.Lcfu_2rem8lp: tst ip, #8 - movne r3, r7, lspull #16 - ldmneia r1!, {r4, r7} @ Shouldnt fault - orrne r3, r3, r4, lspush #16 - movne r4, r4, lspull #16 - orrne r4, r4, r7, lspush #16 - stmneia r0!, {r3 - r4} - tst ip, #4 - movne r3, r7, lspull #16 -USER( TUSER( ldrne) r7, [r1], #4) @ May fault - orrne r3, r3, r7, lspush #16 - strne r3, [r0], #4 - ands ip, ip, #3 - beq .Lcfu_2fupi -.Lcfu_2nowords: mov r3, r7, get_byte_2 - teq ip, #0 - beq .Lcfu_finished - cmp ip, #2 - strb r3, [r0], #1 - movge r3, r7, get_byte_3 - strgeb r3, [r0], #1 -USER( TUSER( ldrgtb) r3, [r1], #0) @ May fault - strgtb r3, [r0], #1 - b .Lcfu_finished - -.Lcfu_3fupi: subs r2, r2, #4 - addmi ip, r2, #4 - bmi .Lcfu_3nowords - mov r3, r7, lspull #24 -USER( TUSER( ldr) r7, [r1], #4) @ May fault - orr r3, r3, r7, lspush #8 - str r3, [r0], #4 - mov ip, r1, lsl #32 - PAGE_SHIFT - rsb ip, ip, #0 - movs ip, ip, lsr #32 - PAGE_SHIFT - beq .Lcfu_3fupi - cmp r2, ip - movlt ip, r2 - sub r2, r2, ip - subs ip, ip, #16 - blt .Lcfu_3rem8lp - -.Lcfu_3cpy8lp: mov r3, r7, lspull #24 - ldmia r1!, {r4 - r7} @ Shouldnt fault - orr r3, r3, r4, lspush #8 - mov r4, r4, lspull #24 - orr r4, r4, r5, lspush #8 - mov r5, r5, lspull #24 - orr r5, r5, r6, lspush #8 - mov r6, r6, lspull #24 - orr r6, r6, r7, lspush #8 - stmia r0!, {r3 - r6} - subs ip, ip, #16 - bpl .Lcfu_3cpy8lp - -.Lcfu_3rem8lp: tst ip, #8 - movne r3, r7, lspull #24 - ldmneia r1!, {r4, r7} @ Shouldnt fault - orrne r3, r3, r4, lspush #8 - movne r4, r4, lspull #24 - orrne r4, r4, r7, lspush #8 - stmneia r0!, {r3 - r4} - tst ip, #4 - movne r3, r7, lspull #24 -USER( TUSER( ldrne) r7, [r1], #4) @ May fault - orrne r3, r3, r7, lspush #8 - strne r3, [r0], #4 - ands ip, ip, #3 - beq .Lcfu_3fupi -.Lcfu_3nowords: mov r3, r7, get_byte_3 - teq ip, #0 - beq .Lcfu_finished - cmp ip, #2 - strb r3, [r0], #1 -USER( TUSER( ldrgeb) r3, [r1], #1) @ May fault - strgeb r3, [r0], #1 -USER( TUSER( ldrgtb) r3, [r1], #1) @ May fault - strgtb r3, [r0], #1 - b .Lcfu_finished -ENDPROC(__copy_from_user) - - .pushsection .fixup,"ax" - .align 0 - /* - * We took an exception. r0 contains a pointer to - * the byte not copied. - */ -9001: ldr r2, [sp], #4 @ void *to - sub r2, r0, r2 @ bytes copied - ldr r1, [sp], #4 @ unsigned long count - subs r4, r1, r2 @ bytes left to copy - movne r1, r4 - blne __memzero - mov r0, r4 - ldmfd sp!, {r4 - r7, pc} - .popsection - diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c index 766f57d2f029..4791a3cc00f9 100644 --- a/arch/arm/mach-exynos/firmware.c +++ b/arch/arm/mach-exynos/firmware.c @@ -17,6 +17,7 @@ #include <asm/cacheflush.h> #include <asm/cputype.h> #include <asm/firmware.h> +#include <asm/hardware/cache-l2x0.h> #include <asm/suspend.h> #include <mach/map.h> @@ -136,6 +137,43 @@ static const struct firmware_ops exynos_firmware_ops = { .resume = IS_ENABLED(CONFIG_EXYNOS_CPU_SUSPEND) ? exynos_resume : NULL, }; +static void exynos_l2_write_sec(unsigned long val, unsigned reg) +{ + static int l2cache_enabled; + + switch (reg) { + case L2X0_CTRL: + if (val & L2X0_CTRL_EN) { + /* + * Before the cache can be enabled, due to firmware + * design, SMC_CMD_L2X0INVALL must be called. + */ + if (!l2cache_enabled) { + exynos_smc(SMC_CMD_L2X0INVALL, 0, 0, 0); + l2cache_enabled = 1; + } + } else { + l2cache_enabled = 0; + } + exynos_smc(SMC_CMD_L2X0CTRL, val, 0, 0); + break; + + case L2X0_DEBUG_CTRL: + exynos_smc(SMC_CMD_L2X0DEBUG, val, 0, 0); + break; + + default: + WARN_ONCE(1, "%s: ignoring write to reg 0x%x\n", __func__, reg); + } +} + +static void exynos_l2_configure(const struct l2x0_regs *regs) +{ + exynos_smc(SMC_CMD_L2X0SETUP1, regs->tag_latency, regs->data_latency, + regs->prefetch_ctrl); + exynos_smc(SMC_CMD_L2X0SETUP2, regs->pwr_ctrl, regs->aux_ctrl, 0); +} + void __init exynos_firmware_init(void) { struct device_node *nd; @@ -155,4 +193,16 @@ void __init exynos_firmware_init(void) pr_info("Running under secure firmware.\n"); register_firmware_ops(&exynos_firmware_ops); + + /* + * Exynos 4 SoCs (based on Cortex A9 and equipped with L2C-310), + * running under secure firmware, require certain registers of L2 + * cache controller to be written in secure mode. Here .write_sec + * callback is provided to perform necessary SMC calls. + */ + if (IS_ENABLED(CONFIG_CACHE_L2X0) && + read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) { + outer_cache.write_sec = exynos_l2_write_sec; + outer_cache.configure = exynos_l2_configure; + } } diff --git a/arch/arm/mach-exynos/sleep.S b/arch/arm/mach-exynos/sleep.S index e3c373082bbe..31d25834b9c4 100644 --- a/arch/arm/mach-exynos/sleep.S +++ b/arch/arm/mach-exynos/sleep.S @@ -16,6 +16,8 @@ */ #include <linux/linkage.h> +#include <asm/asm-offsets.h> +#include <asm/hardware/cache-l2x0.h> #include "smc.h" #define CPU_MASK 0xff0ffff0 @@ -74,6 +76,45 @@ ENTRY(exynos_cpu_resume_ns) mov r0, #SMC_CMD_C15RESUME dsb smc #0 +#ifdef CONFIG_CACHE_L2X0 + adr r0, 1f + ldr r2, [r0] + add r0, r2, r0 + + /* Check that the address has been initialised. */ + ldr r1, [r0, #L2X0_R_PHY_BASE] + teq r1, #0 + beq skip_l2x0 + + /* Check if controller has been enabled. */ + ldr r2, [r1, #L2X0_CTRL] + tst r2, #0x1 + bne skip_l2x0 + + ldr r1, [r0, #L2X0_R_TAG_LATENCY] + ldr r2, [r0, #L2X0_R_DATA_LATENCY] + ldr r3, [r0, #L2X0_R_PREFETCH_CTRL] + mov r0, #SMC_CMD_L2X0SETUP1 + smc #0 + + /* Reload saved regs pointer because smc corrupts registers. */ + adr r0, 1f + ldr r2, [r0] + add r0, r2, r0 + + ldr r1, [r0, #L2X0_R_PWR_CTRL] + ldr r2, [r0, #L2X0_R_AUX_CTRL] + mov r0, #SMC_CMD_L2X0SETUP2 + smc #0 + + mov r0, #SMC_CMD_L2X0INVALL + smc #0 + + mov r1, #1 + mov r0, #SMC_CMD_L2X0CTRL + smc #0 +skip_l2x0: +#endif /* CONFIG_CACHE_L2X0 */ skip_cp15: b cpu_resume ENDPROC(exynos_cpu_resume_ns) @@ -83,3 +124,8 @@ cp15_save_diag: .globl cp15_save_power cp15_save_power: .long 0 @ cp15 power control + +#ifdef CONFIG_CACHE_L2X0 + .align +1: .long l2x0_saved_regs - . +#endif /* CONFIG_CACHE_L2X0 */ diff --git a/arch/arm/mach-omap1/include/mach/debug-macro.S b/arch/arm/mach-omap1/include/mach/debug-macro.S deleted file mode 100644 index 5c1a26c9f490..000000000000 --- a/arch/arm/mach-omap1/include/mach/debug-macro.S +++ /dev/null @@ -1,101 +0,0 @@ -/* arch/arm/mach-omap1/include/mach/debug-macro.S - * - * Debugging macro include header - * - * Copyright (C) 1994-1999 Russell King - * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * -*/ - -#include <linux/serial_reg.h> - -#include "serial.h" - - .pushsection .data -omap_uart_phys: .word 0x0 -omap_uart_virt: .word 0x0 - .popsection - - /* - * Note that this code won't work if the bootloader passes - * a wrong machine ID number in r1. To debug, just hardcode - * the desired UART phys and virt addresses temporarily into - * the omap_uart_phys and omap_uart_virt above. - */ - .macro addruart, rp, rv, tmp - - /* Use omap_uart_phys/virt if already configured */ -9: adr \rp, 99f @ get effective addr of 99f - ldr \rv, [\rp] @ get absolute addr of 99f - sub \rv, \rv, \rp @ offset between the two - ldr \rp, [\rp, #4] @ abs addr of omap_uart_phys - sub \tmp, \rp, \rv @ make it effective - ldr \rp, [\tmp, #0] @ omap_uart_phys - ldr \rv, [\tmp, #4] @ omap_uart_virt - cmp \rp, #0 @ is port configured? - cmpne \rv, #0 - bne 100f @ already configured - - /* Check the debug UART configuration set in uncompress.h */ - and \rp, pc, #0xff000000 - ldr \rv, =OMAP_UART_INFO_OFS - ldr \rp, [\rp, \rv] - - /* Select the UART to use based on the UART1 scratchpad value */ -10: cmp \rp, #0 @ no port configured? - beq 11f @ if none, try to use UART1 - cmp \rp, #OMAP1UART1 - beq 11f @ configure OMAP1UART1 - cmp \rp, #OMAP1UART2 - beq 12f @ configure OMAP1UART2 - cmp \rp, #OMAP1UART3 - beq 13f @ configure OMAP2UART3 - - /* Configure the UART offset from the phys/virt base */ -11: mov \rp, #0x00fb0000 @ OMAP1UART1 - b 98f -12: mov \rp, #0x00fb0000 @ OMAP1UART1 - orr \rp, \rp, #0x00000800 @ OMAP1UART2 - b 98f -13: mov \rp, #0x00fb0000 @ OMAP1UART1 - orr \rp, \rp, #0x00000800 @ OMAP1UART2 - orr \rp, \rp, #0x00009000 @ OMAP1UART3 - - /* Store both phys and virt address for the uart */ -98: add \rp, \rp, #0xff000000 @ phys base - str \rp, [\tmp, #0] @ omap_uart_phys - sub \rp, \rp, #0xff000000 @ phys base - add \rp, \rp, #0xfe000000 @ virt base - str \rp, [\tmp, #4] @ omap_uart_virt - b 9b - - .align -99: .word . - .word omap_uart_phys - .ltorg - -100: - .endm - - .macro senduart,rd,rx - strb \rd, [\rx] - .endm - - .macro busyuart,rd,rx -1001: ldrb \rd, [\rx, #(UART_LSR << OMAP_PORT_SHIFT)] - and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE) - teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE) - beq 1002f - ldrb \rd, [\rx, #(UART_LSR << OMAP7XX_PORT_SHIFT)] - and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE) - teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE) - bne 1001b -1002: - .endm - - .macro waituart,rd,rx - .endm diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c index b61c049f92d6..42b7f4c9169b 100644 --- a/arch/arm/mach-omap2/board-generic.c +++ b/arch/arm/mach-omap2/board-generic.c @@ -189,6 +189,9 @@ static const char *const omap4_boards_compat[] __initconst = { }; DT_MACHINE_START(OMAP4_DT, "Generic OMAP4 (Flattened Device Tree)") + .l2c_aux_val = OMAP_L2C_AUX_CTRL, + .l2c_aux_mask = 0xcf9fffff, + .l2c_write_sec = omap4_l2c310_write_sec, .reserve = omap_reserve, .smp = smp_ops(omap4_smp_ops), .map_io = omap4_map_io, @@ -232,6 +235,9 @@ static const char *const am43_boards_compat[] __initconst = { }; DT_MACHINE_START(AM43_DT, "Generic AM43 (Flattened Device Tree)") + .l2c_aux_val = OMAP_L2C_AUX_CTRL, + .l2c_aux_mask = 0xcf9fffff, + .l2c_write_sec = omap4_l2c310_write_sec, .map_io = am33xx_map_io, .init_early = am43xx_init_early, .init_late = am43xx_init_late, diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h index 64e44d6d07c0..3933b8aa4f01 100644 --- a/arch/arm/mach-omap2/common.h +++ b/arch/arm/mach-omap2/common.h @@ -35,6 +35,7 @@ #include <linux/irqchip/irq-omap-intc.h> #include <asm/proc-fns.h> +#include <asm/hardware/cache-l2x0.h> #include "i2c.h" #include "serial.h" @@ -94,11 +95,18 @@ extern void omap3_gptimer_timer_init(void); extern void omap4_local_timer_init(void); #ifdef CONFIG_CACHE_L2X0 int omap_l2_cache_init(void); +#define OMAP_L2C_AUX_CTRL (L2C_AUX_CTRL_SHARED_OVERRIDE | \ + L310_AUX_CTRL_DATA_PREFETCH | \ + L310_AUX_CTRL_INSTR_PREFETCH) +void omap4_l2c310_write_sec(unsigned long val, unsigned reg); #else static inline int omap_l2_cache_init(void) { return 0; } + +#define OMAP_L2C_AUX_CTRL 0 +#define omap4_l2c310_write_sec NULL #endif extern void omap5_realtime_timer_init(void); diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c index cc30e49a4cc2..2418bdf28ca2 100644 --- a/arch/arm/mach-omap2/omap4-common.c +++ b/arch/arm/mach-omap2/omap4-common.c @@ -166,7 +166,7 @@ void __iomem *omap4_get_l2cache_base(void) return l2cache_base; } -static void omap4_l2c310_write_sec(unsigned long val, unsigned reg) +void omap4_l2c310_write_sec(unsigned long val, unsigned reg) { unsigned smc_op; @@ -201,24 +201,10 @@ static void omap4_l2c310_write_sec(unsigned long val, unsigned reg) int __init omap_l2_cache_init(void) { - u32 aux_ctrl; - /* Static mapping, never released */ l2cache_base = ioremap(OMAP44XX_L2CACHE_BASE, SZ_4K); if (WARN_ON(!l2cache_base)) return -ENOMEM; - - /* 16-way associativity, parity disabled, way size - 64KB (es2.0 +) */ - aux_ctrl = L2C_AUX_CTRL_SHARED_OVERRIDE | - L310_AUX_CTRL_DATA_PREFETCH | - L310_AUX_CTRL_INSTR_PREFETCH; - - outer_cache.write_sec = omap4_l2c310_write_sec; - if (of_have_populated_dt()) - l2x0_of_init(aux_ctrl, 0xcf9fffff); - else - l2x0_init(l2cache_base, aux_ctrl, 0xcf9fffff); - return 0; } #endif diff --git a/arch/arm/mach-qcom/platsmp.c b/arch/arm/mach-qcom/platsmp.c index d6908569ecaf..09cffed4c0a4 100644 --- a/arch/arm/mach-qcom/platsmp.c +++ b/arch/arm/mach-qcom/platsmp.c @@ -44,7 +44,7 @@ #define APCS_SAW2_VCTL 0x14 #define APCS_SAW2_2_VCTL 0x1c -extern void secondary_startup(void); +extern void secondary_startup_arm(void); static DEFINE_SPINLOCK(boot_lock); @@ -337,7 +337,7 @@ static void __init qcom_smp_prepare_cpus(unsigned int max_cpus) flags |= cold_boot_flags[map]; } - if (scm_set_boot_addr(virt_to_phys(secondary_startup), flags)) { + if (scm_set_boot_addr(virt_to_phys(secondary_startup_arm), flags)) { for_each_present_cpu(cpu) { if (cpu == smp_processor_id()) continue; diff --git a/arch/arm/mach-sa1100/Makefile b/arch/arm/mach-sa1100/Makefile index f1114d11fe13..61ff91e76e0a 100644 --- a/arch/arm/mach-sa1100/Makefile +++ b/arch/arm/mach-sa1100/Makefile @@ -3,7 +3,7 @@ # # Common support -obj-y := clock.o generic.o irq.o time.o #nmi-oopser.o +obj-y := clock.o generic.o irq.o #nmi-oopser.o # Specific board support obj-$(CONFIG_SA1100_ASSABET) += assabet.o diff --git a/arch/arm/mach-sa1100/clock.c b/arch/arm/mach-sa1100/clock.c index 03c75a811cb0..cbf53bb9c814 100644 --- a/arch/arm/mach-sa1100/clock.c +++ b/arch/arm/mach-sa1100/clock.c @@ -119,6 +119,17 @@ static DEFINE_CLK(gpio27, &clk_gpio27_ops); static DEFINE_CLK(cpu, &clk_cpu_ops); +static unsigned long clk_36864_get_rate(struct clk *clk) +{ + return 3686400; +} + +static struct clkops clk_36864_ops = { + .get_rate = clk_36864_get_rate, +}; + +static DEFINE_CLK(36864, &clk_36864_ops); + static struct clk_lookup sa11xx_clkregs[] = { CLKDEV_INIT("sa1111.0", NULL, &clk_gpio27), CLKDEV_INIT("sa1100-rtc", NULL, NULL), @@ -126,6 +137,7 @@ static struct clk_lookup sa11xx_clkregs[] = { CLKDEV_INIT("sa11x0-pcmcia", NULL, &clk_cpu), /* sa1111 names devices using internal offsets, PCMCIA is at 0x1800 */ CLKDEV_INIT("1800", NULL, &clk_cpu), + CLKDEV_INIT(NULL, "OSTIMER0", &clk_36864), }; static int __init sa11xx_clk_init(void) diff --git a/arch/arm/mach-sa1100/collie.c b/arch/arm/mach-sa1100/collie.c index 7fcbe3d119c7..3cc2b71e16f0 100644 --- a/arch/arm/mach-sa1100/collie.c +++ b/arch/arm/mach-sa1100/collie.c @@ -371,8 +371,7 @@ static void __init collie_init(void) PPC_LDD6 | PPC_LDD7 | PPC_L_PCLK | PPC_L_LCLK | PPC_L_FCLK | PPC_L_BIAS | PPC_TXD1 | PPC_TXD2 | PPC_TXD3 | PPC_TXD4 | PPC_SCLK | PPC_SFRM; - PWER = _COLLIE_GPIO_AC_IN | _COLLIE_GPIO_CO | _COLLIE_GPIO_ON_KEY | - _COLLIE_GPIO_WAKEUP | _COLLIE_GPIO_nREMOCON_INT | PWER_RTC; + PWER = 0; PGSR = _COLLIE_GPIO_nREMOCON_ON; diff --git a/arch/arm/mach-sa1100/generic.c b/arch/arm/mach-sa1100/generic.c index d4ea142c4edd..40e0d8619a2d 100644 --- a/arch/arm/mach-sa1100/generic.c +++ b/arch/arm/mach-sa1100/generic.c @@ -33,6 +33,7 @@ #include <mach/irqs.h> #include "generic.h" +#include <clocksource/pxa.h> unsigned int reset_status; EXPORT_SYMBOL(reset_status); @@ -369,6 +370,11 @@ void __init sa1100_map_io(void) iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc)); } +void __init sa1100_timer_init(void) +{ + pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x90000000), 3686400); +} + /* * Disable the memory bus request/grant signals on the SA1110 to * ensure that we don't receive spurious memory requests. We set diff --git a/arch/arm/mach-sa1100/include/mach/irqs.h b/arch/arm/mach-sa1100/include/mach/irqs.h index de0983494c7e..734e30e406a3 100644 --- a/arch/arm/mach-sa1100/include/mach/irqs.h +++ b/arch/arm/mach-sa1100/include/mach/irqs.h @@ -8,17 +8,17 @@ * 2001/11/14 RMK Cleaned up and standardised a lot of the IRQs. */ -#define IRQ_GPIO0 1 -#define IRQ_GPIO1 2 -#define IRQ_GPIO2 3 -#define IRQ_GPIO3 4 -#define IRQ_GPIO4 5 -#define IRQ_GPIO5 6 -#define IRQ_GPIO6 7 -#define IRQ_GPIO7 8 -#define IRQ_GPIO8 9 -#define IRQ_GPIO9 10 -#define IRQ_GPIO10 11 +#define IRQ_GPIO0_SC 1 +#define IRQ_GPIO1_SC 2 +#define IRQ_GPIO2_SC 3 +#define IRQ_GPIO3_SC 4 +#define IRQ_GPIO4_SC 5 +#define IRQ_GPIO5_SC 6 +#define IRQ_GPIO6_SC 7 +#define IRQ_GPIO7_SC 8 +#define IRQ_GPIO8_SC 9 +#define IRQ_GPIO9_SC 10 +#define IRQ_GPIO10_SC 11 #define IRQ_GPIO11_27 12 #define IRQ_LCD 13 /* LCD controller */ #define IRQ_Ser0UDC 14 /* Ser. port 0 UDC */ @@ -41,32 +41,43 @@ #define IRQ_RTC1Hz 31 /* RTC 1 Hz clock */ #define IRQ_RTCAlrm 32 /* RTC Alarm */ -#define IRQ_GPIO11 33 -#define IRQ_GPIO12 34 -#define IRQ_GPIO13 35 -#define IRQ_GPIO14 36 -#define IRQ_GPIO15 37 -#define IRQ_GPIO16 38 -#define IRQ_GPIO17 39 -#define IRQ_GPIO18 40 -#define IRQ_GPIO19 41 -#define IRQ_GPIO20 42 -#define IRQ_GPIO21 43 -#define IRQ_GPIO22 44 -#define IRQ_GPIO23 45 -#define IRQ_GPIO24 46 -#define IRQ_GPIO25 47 -#define IRQ_GPIO26 48 -#define IRQ_GPIO27 49 +#define IRQ_GPIO0 33 +#define IRQ_GPIO1 34 +#define IRQ_GPIO2 35 +#define IRQ_GPIO3 36 +#define IRQ_GPIO4 37 +#define IRQ_GPIO5 38 +#define IRQ_GPIO6 39 +#define IRQ_GPIO7 40 +#define IRQ_GPIO8 41 +#define IRQ_GPIO9 42 +#define IRQ_GPIO10 43 +#define IRQ_GPIO11 44 +#define IRQ_GPIO12 45 +#define IRQ_GPIO13 46 +#define IRQ_GPIO14 47 +#define IRQ_GPIO15 48 +#define IRQ_GPIO16 49 +#define IRQ_GPIO17 50 +#define IRQ_GPIO18 51 +#define IRQ_GPIO19 52 +#define IRQ_GPIO20 53 +#define IRQ_GPIO21 54 +#define IRQ_GPIO22 55 +#define IRQ_GPIO23 56 +#define IRQ_GPIO24 57 +#define IRQ_GPIO25 58 +#define IRQ_GPIO26 59 +#define IRQ_GPIO27 60 /* * The next 16 interrupts are for board specific purposes. Since * the kernel can only run on one machine at a time, we can re-use * these. If you need more, increase IRQ_BOARD_END, but keep it - * within sensible limits. IRQs 49 to 64 are available. + * within sensible limits. IRQs 61 to 76 are available. */ -#define IRQ_BOARD_START 50 -#define IRQ_BOARD_END 66 +#define IRQ_BOARD_START 61 +#define IRQ_BOARD_END 77 /* * Figure out the MAX IRQ number. diff --git a/arch/arm/mach-sa1100/irq.c b/arch/arm/mach-sa1100/irq.c index 63e2901db416..65aebfa66fe5 100644 --- a/arch/arm/mach-sa1100/irq.c +++ b/arch/arm/mach-sa1100/irq.c @@ -80,170 +80,6 @@ static struct irq_domain_ops sa1100_normal_irqdomain_ops = { static struct irq_domain *sa1100_normal_irqdomain; -/* - * SA1100 GPIO edge detection for IRQs: - * IRQs are generated on Falling-Edge, Rising-Edge, or both. - * Use this instead of directly setting GRER/GFER. - */ -static int GPIO_IRQ_rising_edge; -static int GPIO_IRQ_falling_edge; -static int GPIO_IRQ_mask = (1 << 11) - 1; - -static int sa1100_gpio_type(struct irq_data *d, unsigned int type) -{ - unsigned int mask; - - mask = BIT(d->hwirq); - - if (type == IRQ_TYPE_PROBE) { - if ((GPIO_IRQ_rising_edge | GPIO_IRQ_falling_edge) & mask) - return 0; - type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING; - } - - if (type & IRQ_TYPE_EDGE_RISING) { - GPIO_IRQ_rising_edge |= mask; - } else - GPIO_IRQ_rising_edge &= ~mask; - if (type & IRQ_TYPE_EDGE_FALLING) { - GPIO_IRQ_falling_edge |= mask; - } else - GPIO_IRQ_falling_edge &= ~mask; - - GRER = GPIO_IRQ_rising_edge & GPIO_IRQ_mask; - GFER = GPIO_IRQ_falling_edge & GPIO_IRQ_mask; - - return 0; -} - -/* - * GPIO IRQs must be acknowledged. - */ -static void sa1100_gpio_ack(struct irq_data *d) -{ - GEDR = BIT(d->hwirq); -} - -static int sa1100_gpio_wake(struct irq_data *d, unsigned int on) -{ - if (on) - PWER |= BIT(d->hwirq); - else - PWER &= ~BIT(d->hwirq); - return 0; -} - -/* - * This is for IRQs from 0 to 10. - */ -static struct irq_chip sa1100_low_gpio_chip = { - .name = "GPIO-l", - .irq_ack = sa1100_gpio_ack, - .irq_mask = sa1100_mask_irq, - .irq_unmask = sa1100_unmask_irq, - .irq_set_type = sa1100_gpio_type, - .irq_set_wake = sa1100_gpio_wake, -}; - -static int sa1100_low_gpio_irqdomain_map(struct irq_domain *d, - unsigned int irq, irq_hw_number_t hwirq) -{ - irq_set_chip_and_handler(irq, &sa1100_low_gpio_chip, - handle_edge_irq); - set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); - - return 0; -} - -static struct irq_domain_ops sa1100_low_gpio_irqdomain_ops = { - .map = sa1100_low_gpio_irqdomain_map, - .xlate = irq_domain_xlate_onetwocell, -}; - -static struct irq_domain *sa1100_low_gpio_irqdomain; - -/* - * IRQ11 (GPIO11 through 27) handler. We enter here with the - * irq_controller_lock held, and IRQs disabled. Decode the IRQ - * and call the handler. - */ -static void -sa1100_high_gpio_handler(unsigned int irq, struct irq_desc *desc) -{ - unsigned int mask; - - mask = GEDR & 0xfffff800; - do { - /* - * clear down all currently active IRQ sources. - * We will be processing them all. - */ - GEDR = mask; - - irq = IRQ_GPIO11; - mask >>= 11; - do { - if (mask & 1) - generic_handle_irq(irq); - mask >>= 1; - irq++; - } while (mask); - - mask = GEDR & 0xfffff800; - } while (mask); -} - -/* - * Like GPIO0 to 10, GPIO11-27 IRQs need to be handled specially. - * In addition, the IRQs are all collected up into one bit in the - * interrupt controller registers. - */ -static void sa1100_high_gpio_mask(struct irq_data *d) -{ - unsigned int mask = BIT(d->hwirq); - - GPIO_IRQ_mask &= ~mask; - - GRER &= ~mask; - GFER &= ~mask; -} - -static void sa1100_high_gpio_unmask(struct irq_data *d) -{ - unsigned int mask = BIT(d->hwirq); - - GPIO_IRQ_mask |= mask; - - GRER = GPIO_IRQ_rising_edge & GPIO_IRQ_mask; - GFER = GPIO_IRQ_falling_edge & GPIO_IRQ_mask; -} - -static struct irq_chip sa1100_high_gpio_chip = { - .name = "GPIO-h", - .irq_ack = sa1100_gpio_ack, - .irq_mask = sa1100_high_gpio_mask, - .irq_unmask = sa1100_high_gpio_unmask, - .irq_set_type = sa1100_gpio_type, - .irq_set_wake = sa1100_gpio_wake, -}; - -static int sa1100_high_gpio_irqdomain_map(struct irq_domain *d, - unsigned int irq, irq_hw_number_t hwirq) -{ - irq_set_chip_and_handler(irq, &sa1100_high_gpio_chip, - handle_edge_irq); - set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); - - return 0; -} - -static struct irq_domain_ops sa1100_high_gpio_irqdomain_ops = { - .map = sa1100_high_gpio_irqdomain_map, - .xlate = irq_domain_xlate_onetwocell, -}; - -static struct irq_domain *sa1100_high_gpio_irqdomain; - static struct resource irq_resource = DEFINE_RES_MEM_NAMED(0x90050000, SZ_64K, "irqs"); @@ -270,17 +106,6 @@ static int sa1100irq_suspend(void) IC_GPIO6|IC_GPIO5|IC_GPIO4|IC_GPIO3|IC_GPIO2| IC_GPIO1|IC_GPIO0); - /* - * Set the appropriate edges for wakeup. - */ - GRER = PWER & GPIO_IRQ_rising_edge; - GFER = PWER & GPIO_IRQ_falling_edge; - - /* - * Clear any pending GPIO interrupts. - */ - GEDR = GEDR; - return 0; } @@ -292,9 +117,6 @@ static void sa1100irq_resume(void) ICCR = st->iccr; ICLR = st->iclr; - GRER = GPIO_IRQ_rising_edge & GPIO_IRQ_mask; - GFER = GPIO_IRQ_falling_edge & GPIO_IRQ_mask; - ICMR = st->icmr; } } @@ -325,7 +147,8 @@ sa1100_handle_irq(struct pt_regs *regs) if (mask == 0) break; - handle_IRQ(ffs(mask) - 1 + IRQ_GPIO0, regs); + handle_domain_irq(sa1100_normal_irqdomain, + ffs(mask) - 1, regs); } while (1); } @@ -339,34 +162,16 @@ void __init sa1100_init_irq(void) /* all IRQs are IRQ, not FIQ */ ICLR = 0; - /* clear all GPIO edge detects */ - GFER = 0; - GRER = 0; - GEDR = -1; - /* * Whatever the doc says, this has to be set for the wait-on-irq * instruction to work... on a SA1100 rev 9 at least. */ ICCR = 1; - sa1100_low_gpio_irqdomain = irq_domain_add_legacy(NULL, - 11, IRQ_GPIO0, 0, - &sa1100_low_gpio_irqdomain_ops, NULL); - - sa1100_normal_irqdomain = irq_domain_add_legacy(NULL, - 21, IRQ_GPIO11_27, 11, + sa1100_normal_irqdomain = irq_domain_add_simple(NULL, + 32, IRQ_GPIO0_SC, &sa1100_normal_irqdomain_ops, NULL); - sa1100_high_gpio_irqdomain = irq_domain_add_legacy(NULL, - 17, IRQ_GPIO11, 11, - &sa1100_high_gpio_irqdomain_ops, NULL); - - /* - * Install handler for GPIO 11-27 edge detect interrupts - */ - irq_set_chained_handler(IRQ_GPIO11_27, sa1100_high_gpio_handler); - set_handle_irq(sa1100_handle_irq); sa1100_init_gpio(); diff --git a/arch/arm/mach-sa1100/pm.c b/arch/arm/mach-sa1100/pm.c index 6645d1e31f14..34853d5dfda2 100644 --- a/arch/arm/mach-sa1100/pm.c +++ b/arch/arm/mach-sa1100/pm.c @@ -81,6 +81,7 @@ static int sa11x0_pm_enter(suspend_state_t state) /* * Ensure not to come back here if it wasn't intended */ + RCSR = RCSR_SMR; PSPR = 0; /* diff --git a/arch/arm/mach-sa1100/time.c b/arch/arm/mach-sa1100/time.c deleted file mode 100644 index 1dea6cfafb31..000000000000 --- a/arch/arm/mach-sa1100/time.c +++ /dev/null @@ -1,139 +0,0 @@ -/* - * linux/arch/arm/mach-sa1100/time.c - * - * Copyright (C) 1998 Deborah Wallach. - * Twiddles (C) 1999 Hugo Fiennes <hugo@empeg.com> - * - * 2000/03/29 (C) Nicolas Pitre <nico@fluxnic.net> - * Rewritten: big cleanup, much simpler, better HZ accuracy. - * - */ -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/timex.h> -#include <linux/clockchips.h> -#include <linux/sched_clock.h> - -#include <asm/mach/time.h> -#include <mach/hardware.h> -#include <mach/irqs.h> - -#define SA1100_CLOCK_FREQ 3686400 -#define SA1100_LATCH DIV_ROUND_CLOSEST(SA1100_CLOCK_FREQ, HZ) - -static u64 notrace sa1100_read_sched_clock(void) -{ - return readl_relaxed(OSCR); -} - -#define MIN_OSCR_DELTA 2 - -static irqreturn_t sa1100_ost0_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *c = dev_id; - - /* Disarm the compare/match, signal the event. */ - writel_relaxed(readl_relaxed(OIER) & ~OIER_E0, OIER); - writel_relaxed(OSSR_M0, OSSR); - c->event_handler(c); - - return IRQ_HANDLED; -} - -static int -sa1100_osmr0_set_next_event(unsigned long delta, struct clock_event_device *c) -{ - unsigned long next, oscr; - - writel_relaxed(readl_relaxed(OIER) | OIER_E0, OIER); - next = readl_relaxed(OSCR) + delta; - writel_relaxed(next, OSMR0); - oscr = readl_relaxed(OSCR); - - return (signed)(next - oscr) <= MIN_OSCR_DELTA ? -ETIME : 0; -} - -static void -sa1100_osmr0_set_mode(enum clock_event_mode mode, struct clock_event_device *c) -{ - switch (mode) { - case CLOCK_EVT_MODE_ONESHOT: - case CLOCK_EVT_MODE_UNUSED: - case CLOCK_EVT_MODE_SHUTDOWN: - writel_relaxed(readl_relaxed(OIER) & ~OIER_E0, OIER); - writel_relaxed(OSSR_M0, OSSR); - break; - - case CLOCK_EVT_MODE_RESUME: - case CLOCK_EVT_MODE_PERIODIC: - break; - } -} - -#ifdef CONFIG_PM -unsigned long osmr[4], oier; - -static void sa1100_timer_suspend(struct clock_event_device *cedev) -{ - osmr[0] = readl_relaxed(OSMR0); - osmr[1] = readl_relaxed(OSMR1); - osmr[2] = readl_relaxed(OSMR2); - osmr[3] = readl_relaxed(OSMR3); - oier = readl_relaxed(OIER); -} - -static void sa1100_timer_resume(struct clock_event_device *cedev) -{ - writel_relaxed(0x0f, OSSR); - writel_relaxed(osmr[0], OSMR0); - writel_relaxed(osmr[1], OSMR1); - writel_relaxed(osmr[2], OSMR2); - writel_relaxed(osmr[3], OSMR3); - writel_relaxed(oier, OIER); - - /* - * OSMR0 is the system timer: make sure OSCR is sufficiently behind - */ - writel_relaxed(OSMR0 - SA1100_LATCH, OSCR); -} -#else -#define sa1100_timer_suspend NULL -#define sa1100_timer_resume NULL -#endif - -static struct clock_event_device ckevt_sa1100_osmr0 = { - .name = "osmr0", - .features = CLOCK_EVT_FEAT_ONESHOT, - .rating = 200, - .set_next_event = sa1100_osmr0_set_next_event, - .set_mode = sa1100_osmr0_set_mode, - .suspend = sa1100_timer_suspend, - .resume = sa1100_timer_resume, -}; - -static struct irqaction sa1100_timer_irq = { - .name = "ost0", - .flags = IRQF_TIMER | IRQF_IRQPOLL, - .handler = sa1100_ost0_interrupt, - .dev_id = &ckevt_sa1100_osmr0, -}; - -void __init sa1100_timer_init(void) -{ - writel_relaxed(0, OIER); - writel_relaxed(OSSR_M0 | OSSR_M1 | OSSR_M2 | OSSR_M3, OSSR); - - sched_clock_register(sa1100_read_sched_clock, 32, 3686400); - - ckevt_sa1100_osmr0.cpumask = cpumask_of(0); - - setup_irq(IRQ_OST0, &sa1100_timer_irq); - - clocksource_mmio_init(OSCR, "oscr", SA1100_CLOCK_FREQ, 200, 32, - clocksource_mmio_readl_up); - clockevents_config_and_register(&ckevt_sa1100_osmr0, 3686400, - MIN_OSCR_DELTA * 2, 0x7fffffff); -} diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c index c7fc009ad21c..c6c7696b8db9 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c @@ -41,12 +41,14 @@ struct l2c_init_data { void (*enable)(void __iomem *, u32, unsigned); void (*fixup)(void __iomem *, u32, struct outer_cache_fns *); void (*save)(void __iomem *); + void (*configure)(void __iomem *); struct outer_cache_fns outer_cache; }; #define CACHE_LINE_SIZE 32 static void __iomem *l2x0_base; +static const struct l2c_init_data *l2x0_data; static DEFINE_RAW_SPINLOCK(l2x0_lock); static u32 l2x0_way_mask; /* Bitmask of active ways */ static u32 l2x0_size; @@ -106,6 +108,19 @@ static inline void l2c_unlock(void __iomem *base, unsigned num) } } +static void l2c_configure(void __iomem *base) +{ + if (outer_cache.configure) { + outer_cache.configure(&l2x0_saved_regs); + return; + } + + if (l2x0_data->configure) + l2x0_data->configure(base); + + l2c_write_sec(l2x0_saved_regs.aux_ctrl, base, L2X0_AUX_CTRL); +} + /* * Enable the L2 cache controller. This function must only be * called when the cache controller is known to be disabled. @@ -114,7 +129,12 @@ static void l2c_enable(void __iomem *base, u32 aux, unsigned num_lock) { unsigned long flags; - l2c_write_sec(aux, base, L2X0_AUX_CTRL); + /* Do not touch the controller if already enabled. */ + if (readl_relaxed(base + L2X0_CTRL) & L2X0_CTRL_EN) + return; + + l2x0_saved_regs.aux_ctrl = aux; + l2c_configure(base); l2c_unlock(base, num_lock); @@ -136,76 +156,14 @@ static void l2c_disable(void) dsb(st); } -#ifdef CONFIG_CACHE_PL310 -static inline void cache_wait(void __iomem *reg, unsigned long mask) -{ - /* cache operations by line are atomic on PL310 */ -} -#else -#define cache_wait l2c_wait_mask -#endif - -static inline void cache_sync(void) -{ - void __iomem *base = l2x0_base; - - writel_relaxed(0, base + sync_reg_offset); - cache_wait(base + L2X0_CACHE_SYNC, 1); -} - -#if defined(CONFIG_PL310_ERRATA_588369) || defined(CONFIG_PL310_ERRATA_727915) -static inline void debug_writel(unsigned long val) -{ - l2c_set_debug(l2x0_base, val); -} -#else -/* Optimised out for non-errata case */ -static inline void debug_writel(unsigned long val) -{ -} -#endif - -static void l2x0_cache_sync(void) -{ - unsigned long flags; - - raw_spin_lock_irqsave(&l2x0_lock, flags); - cache_sync(); - raw_spin_unlock_irqrestore(&l2x0_lock, flags); -} - -static void __l2x0_flush_all(void) -{ - debug_writel(0x03); - __l2c_op_way(l2x0_base + L2X0_CLEAN_INV_WAY); - cache_sync(); - debug_writel(0x00); -} - -static void l2x0_flush_all(void) -{ - unsigned long flags; - - /* clean all ways */ - raw_spin_lock_irqsave(&l2x0_lock, flags); - __l2x0_flush_all(); - raw_spin_unlock_irqrestore(&l2x0_lock, flags); -} - -static void l2x0_disable(void) +static void l2c_save(void __iomem *base) { - unsigned long flags; - - raw_spin_lock_irqsave(&l2x0_lock, flags); - __l2x0_flush_all(); - l2c_write_sec(0, l2x0_base, L2X0_CTRL); - dsb(st); - raw_spin_unlock_irqrestore(&l2x0_lock, flags); + l2x0_saved_regs.aux_ctrl = readl_relaxed(l2x0_base + L2X0_AUX_CTRL); } -static void l2c_save(void __iomem *base) +static void l2c_resume(void) { - l2x0_saved_regs.aux_ctrl = readl_relaxed(l2x0_base + L2X0_AUX_CTRL); + l2c_enable(l2x0_base, l2x0_saved_regs.aux_ctrl, l2x0_data->num_lock); } /* @@ -288,14 +246,6 @@ static void l2c210_sync(void) __l2c210_cache_sync(l2x0_base); } -static void l2c210_resume(void) -{ - void __iomem *base = l2x0_base; - - if (!(readl_relaxed(base + L2X0_CTRL) & L2X0_CTRL_EN)) - l2c_enable(base, l2x0_saved_regs.aux_ctrl, 1); -} - static const struct l2c_init_data l2c210_data __initconst = { .type = "L2C-210", .way_size_0 = SZ_8K, @@ -309,7 +259,7 @@ static const struct l2c_init_data l2c210_data __initconst = { .flush_all = l2c210_flush_all, .disable = l2c_disable, .sync = l2c210_sync, - .resume = l2c210_resume, + .resume = l2c_resume, }, }; @@ -466,7 +416,7 @@ static const struct l2c_init_data l2c220_data = { .flush_all = l2c220_flush_all, .disable = l2c_disable, .sync = l2c220_sync, - .resume = l2c210_resume, + .resume = l2c_resume, }, }; @@ -615,39 +565,29 @@ static void __init l2c310_save(void __iomem *base) L310_POWER_CTRL); } -static void l2c310_resume(void) +static void l2c310_configure(void __iomem *base) { - void __iomem *base = l2x0_base; + unsigned revision; - if (!(readl_relaxed(base + L2X0_CTRL) & L2X0_CTRL_EN)) { - unsigned revision; - - /* restore pl310 setup */ - writel_relaxed(l2x0_saved_regs.tag_latency, - base + L310_TAG_LATENCY_CTRL); - writel_relaxed(l2x0_saved_regs.data_latency, - base + L310_DATA_LATENCY_CTRL); - writel_relaxed(l2x0_saved_regs.filter_end, - base + L310_ADDR_FILTER_END); - writel_relaxed(l2x0_saved_regs.filter_start, - base + L310_ADDR_FILTER_START); - - revision = readl_relaxed(base + L2X0_CACHE_ID) & - L2X0_CACHE_ID_RTL_MASK; - - if (revision >= L310_CACHE_ID_RTL_R2P0) - l2c_write_sec(l2x0_saved_regs.prefetch_ctrl, base, - L310_PREFETCH_CTRL); - if (revision >= L310_CACHE_ID_RTL_R3P0) - l2c_write_sec(l2x0_saved_regs.pwr_ctrl, base, - L310_POWER_CTRL); - - l2c_enable(base, l2x0_saved_regs.aux_ctrl, 8); - - /* Re-enable full-line-of-zeros for Cortex-A9 */ - if (l2x0_saved_regs.aux_ctrl & L310_AUX_CTRL_FULL_LINE_ZERO) - set_auxcr(get_auxcr() | BIT(3) | BIT(2) | BIT(1)); - } + /* restore pl310 setup */ + l2c_write_sec(l2x0_saved_regs.tag_latency, base, + L310_TAG_LATENCY_CTRL); + l2c_write_sec(l2x0_saved_regs.data_latency, base, + L310_DATA_LATENCY_CTRL); + l2c_write_sec(l2x0_saved_regs.filter_end, base, + L310_ADDR_FILTER_END); + l2c_write_sec(l2x0_saved_regs.filter_start, base, + L310_ADDR_FILTER_START); + + revision = readl_relaxed(base + L2X0_CACHE_ID) & + L2X0_CACHE_ID_RTL_MASK; + + if (revision >= L310_CACHE_ID_RTL_R2P0) + l2c_write_sec(l2x0_saved_regs.prefetch_ctrl, base, + L310_PREFETCH_CTRL); + if (revision >= L310_CACHE_ID_RTL_R3P0) + l2c_write_sec(l2x0_saved_regs.pwr_ctrl, base, + L310_POWER_CTRL); } static int l2c310_cpu_enable_flz(struct notifier_block *nb, unsigned long act, void *data) @@ -699,6 +639,23 @@ static void __init l2c310_enable(void __iomem *base, u32 aux, unsigned num_lock) aux &= ~(L310_AUX_CTRL_FULL_LINE_ZERO | L310_AUX_CTRL_EARLY_BRESP); } + /* r3p0 or later has power control register */ + if (rev >= L310_CACHE_ID_RTL_R3P0) + l2x0_saved_regs.pwr_ctrl = L310_DYNAMIC_CLK_GATING_EN | + L310_STNDBY_MODE_EN; + + /* + * Always enable non-secure access to the lockdown registers - + * we write to them as part of the L2C enable sequence so they + * need to be accessible. + */ + aux |= L310_AUX_CTRL_NS_LOCKDOWN; + + l2c_enable(base, aux, num_lock); + + /* Read back resulting AUX_CTRL value as it could have been altered. */ + aux = readl_relaxed(base + L2X0_AUX_CTRL); + if (aux & (L310_AUX_CTRL_DATA_PREFETCH | L310_AUX_CTRL_INSTR_PREFETCH)) { u32 prefetch = readl_relaxed(base + L310_PREFETCH_CTRL); @@ -712,23 +669,12 @@ static void __init l2c310_enable(void __iomem *base, u32 aux, unsigned num_lock) if (rev >= L310_CACHE_ID_RTL_R3P0) { u32 power_ctrl; - l2c_write_sec(L310_DYNAMIC_CLK_GATING_EN | L310_STNDBY_MODE_EN, - base, L310_POWER_CTRL); power_ctrl = readl_relaxed(base + L310_POWER_CTRL); pr_info("L2C-310 dynamic clock gating %sabled, standby mode %sabled\n", power_ctrl & L310_DYNAMIC_CLK_GATING_EN ? "en" : "dis", power_ctrl & L310_STNDBY_MODE_EN ? "en" : "dis"); } - /* - * Always enable non-secure access to the lockdown registers - - * we write to them as part of the L2C enable sequence so they - * need to be accessible. - */ - aux |= L310_AUX_CTRL_NS_LOCKDOWN; - - l2c_enable(base, aux, num_lock); - if (aux & L310_AUX_CTRL_FULL_LINE_ZERO) { set_auxcr(get_auxcr() | BIT(3) | BIT(2) | BIT(1)); cpu_notifier(l2c310_cpu_enable_flz, 0); @@ -760,11 +706,11 @@ static void __init l2c310_fixup(void __iomem *base, u32 cache_id, if (revision >= L310_CACHE_ID_RTL_R3P0 && revision < L310_CACHE_ID_RTL_R3P2) { - u32 val = readl_relaxed(base + L310_PREFETCH_CTRL); + u32 val = l2x0_saved_regs.prefetch_ctrl; /* I don't think bit23 is required here... but iMX6 does so */ if (val & (BIT(30) | BIT(23))) { val &= ~(BIT(30) | BIT(23)); - l2c_write_sec(val, base, L310_PREFETCH_CTRL); + l2x0_saved_regs.prefetch_ctrl = val; errata[n++] = "752271"; } } @@ -800,6 +746,15 @@ static void l2c310_disable(void) l2c_disable(); } +static void l2c310_resume(void) +{ + l2c_resume(); + + /* Re-enable full-line-of-zeros for Cortex-A9 */ + if (l2x0_saved_regs.aux_ctrl & L310_AUX_CTRL_FULL_LINE_ZERO) + set_auxcr(get_auxcr() | BIT(3) | BIT(2) | BIT(1)); +} + static const struct l2c_init_data l2c310_init_fns __initconst = { .type = "L2C-310", .way_size_0 = SZ_8K, @@ -807,6 +762,7 @@ static const struct l2c_init_data l2c310_init_fns __initconst = { .enable = l2c310_enable, .fixup = l2c310_fixup, .save = l2c310_save, + .configure = l2c310_configure, .outer_cache = { .inv_range = l2c210_inv_range, .clean_range = l2c210_clean_range, @@ -818,14 +774,22 @@ static const struct l2c_init_data l2c310_init_fns __initconst = { }, }; -static void __init __l2c_init(const struct l2c_init_data *data, - u32 aux_val, u32 aux_mask, u32 cache_id) +static int __init __l2c_init(const struct l2c_init_data *data, + u32 aux_val, u32 aux_mask, u32 cache_id) { struct outer_cache_fns fns; unsigned way_size_bits, ways; u32 aux, old_aux; /* + * Save the pointer globally so that callbacks which do not receive + * context from callers can access the structure. + */ + l2x0_data = kmemdup(data, sizeof(*data), GFP_KERNEL); + if (!l2x0_data) + return -ENOMEM; + + /* * Sanity check the aux values. aux_mask is the bits we preserve * from reading the hardware register, and aux_val is the bits we * set. @@ -884,6 +848,7 @@ static void __init __l2c_init(const struct l2c_init_data *data, fns = data->outer_cache; fns.write_sec = outer_cache.write_sec; + fns.configure = outer_cache.configure; if (data->fixup) data->fixup(l2x0_base, cache_id, &fns); @@ -910,6 +875,8 @@ static void __init __l2c_init(const struct l2c_init_data *data, data->type, ways, l2x0_size >> 10); pr_info("%s: CACHE_ID 0x%08x, AUX_CTRL 0x%08x\n", data->type, cache_id, aux); + + return 0; } void __init l2x0_init(void __iomem *base, u32 aux_val, u32 aux_mask) @@ -936,6 +903,10 @@ void __init l2x0_init(void __iomem *base, u32 aux_val, u32 aux_mask) break; } + /* Read back current (default) hardware configuration */ + if (data->save) + data->save(l2x0_base); + __l2c_init(data, aux_val, aux_mask, cache_id); } @@ -1102,7 +1073,7 @@ static const struct l2c_init_data of_l2c210_data __initconst = { .flush_all = l2c210_flush_all, .disable = l2c_disable, .sync = l2c210_sync, - .resume = l2c210_resume, + .resume = l2c_resume, }, }; @@ -1120,7 +1091,7 @@ static const struct l2c_init_data of_l2c220_data __initconst = { .flush_all = l2c220_flush_all, .disable = l2c_disable, .sync = l2c220_sync, - .resume = l2c210_resume, + .resume = l2c_resume, }, }; @@ -1131,32 +1102,32 @@ static void __init l2c310_of_parse(const struct device_node *np, u32 tag[3] = { 0, 0, 0 }; u32 filter[2] = { 0, 0 }; u32 assoc; + u32 prefetch; + u32 val; int ret; of_property_read_u32_array(np, "arm,tag-latency", tag, ARRAY_SIZE(tag)); if (tag[0] && tag[1] && tag[2]) - writel_relaxed( + l2x0_saved_regs.tag_latency = L310_LATENCY_CTRL_RD(tag[0] - 1) | L310_LATENCY_CTRL_WR(tag[1] - 1) | - L310_LATENCY_CTRL_SETUP(tag[2] - 1), - l2x0_base + L310_TAG_LATENCY_CTRL); + L310_LATENCY_CTRL_SETUP(tag[2] - 1); of_property_read_u32_array(np, "arm,data-latency", data, ARRAY_SIZE(data)); if (data[0] && data[1] && data[2]) - writel_relaxed( + l2x0_saved_regs.data_latency = L310_LATENCY_CTRL_RD(data[0] - 1) | L310_LATENCY_CTRL_WR(data[1] - 1) | - L310_LATENCY_CTRL_SETUP(data[2] - 1), - l2x0_base + L310_DATA_LATENCY_CTRL); + L310_LATENCY_CTRL_SETUP(data[2] - 1); of_property_read_u32_array(np, "arm,filter-ranges", filter, ARRAY_SIZE(filter)); if (filter[1]) { - writel_relaxed(ALIGN(filter[0] + filter[1], SZ_1M), - l2x0_base + L310_ADDR_FILTER_END); - writel_relaxed((filter[0] & ~(SZ_1M - 1)) | L310_ADDR_FILTER_EN, - l2x0_base + L310_ADDR_FILTER_START); + l2x0_saved_regs.filter_end = + ALIGN(filter[0] + filter[1], SZ_1M); + l2x0_saved_regs.filter_start = (filter[0] & ~(SZ_1M - 1)) + | L310_ADDR_FILTER_EN; } ret = l2x0_cache_size_of_parse(np, aux_val, aux_mask, &assoc, SZ_512K); @@ -1178,6 +1149,58 @@ static void __init l2c310_of_parse(const struct device_node *np, assoc); break; } + + prefetch = l2x0_saved_regs.prefetch_ctrl; + + ret = of_property_read_u32(np, "arm,double-linefill", &val); + if (ret == 0) { + if (val) + prefetch |= L310_PREFETCH_CTRL_DBL_LINEFILL; + else + prefetch &= ~L310_PREFETCH_CTRL_DBL_LINEFILL; + } else if (ret != -EINVAL) { + pr_err("L2C-310 OF arm,double-linefill property value is missing\n"); + } + + ret = of_property_read_u32(np, "arm,double-linefill-incr", &val); + if (ret == 0) { + if (val) + prefetch |= L310_PREFETCH_CTRL_DBL_LINEFILL_INCR; + else + prefetch &= ~L310_PREFETCH_CTRL_DBL_LINEFILL_INCR; + } else if (ret != -EINVAL) { + pr_err("L2C-310 OF arm,double-linefill-incr property value is missing\n"); + } + + ret = of_property_read_u32(np, "arm,double-linefill-wrap", &val); + if (ret == 0) { + if (!val) + prefetch |= L310_PREFETCH_CTRL_DBL_LINEFILL_WRAP; + else + prefetch &= ~L310_PREFETCH_CTRL_DBL_LINEFILL_WRAP; + } else if (ret != -EINVAL) { + pr_err("L2C-310 OF arm,double-linefill-wrap property value is missing\n"); + } + + ret = of_property_read_u32(np, "arm,prefetch-drop", &val); + if (ret == 0) { + if (val) + prefetch |= L310_PREFETCH_CTRL_PREFETCH_DROP; + else + prefetch &= ~L310_PREFETCH_CTRL_PREFETCH_DROP; + } else if (ret != -EINVAL) { + pr_err("L2C-310 OF arm,prefetch-drop property value is missing\n"); + } + + ret = of_property_read_u32(np, "arm,prefetch-offset", &val); + if (ret == 0) { + prefetch &= ~L310_PREFETCH_CTRL_OFFSET_MASK; + prefetch |= val & L310_PREFETCH_CTRL_OFFSET_MASK; + } else if (ret != -EINVAL) { + pr_err("L2C-310 OF arm,prefetch-offset property value is missing\n"); + } + + l2x0_saved_regs.prefetch_ctrl = prefetch; } static const struct l2c_init_data of_l2c310_data __initconst = { @@ -1188,6 +1211,7 @@ static const struct l2c_init_data of_l2c310_data __initconst = { .enable = l2c310_enable, .fixup = l2c310_fixup, .save = l2c310_save, + .configure = l2c310_configure, .outer_cache = { .inv_range = l2c210_inv_range, .clean_range = l2c210_clean_range, @@ -1216,6 +1240,7 @@ static const struct l2c_init_data of_l2c310_coherent_data __initconst = { .enable = l2c310_enable, .fixup = l2c310_fixup, .save = l2c310_save, + .configure = l2c310_configure, .outer_cache = { .inv_range = l2c210_inv_range, .clean_range = l2c210_clean_range, @@ -1231,7 +1256,7 @@ static const struct l2c_init_data of_l2c310_coherent_data __initconst = { * noninclusive, while the hardware cache range operations use * inclusive start and end addresses. */ -static unsigned long calc_range_end(unsigned long start, unsigned long end) +static unsigned long aurora_range_end(unsigned long start, unsigned long end) { /* * Limit the number of cache lines processed at once, @@ -1250,25 +1275,13 @@ static unsigned long calc_range_end(unsigned long start, unsigned long end) return end; } -/* - * Make sure 'start' and 'end' reference the same page, as L2 is PIPT - * and range operations only do a TLB lookup on the start address. - */ static void aurora_pa_range(unsigned long start, unsigned long end, - unsigned long offset) + unsigned long offset) { + void __iomem *base = l2x0_base; + unsigned long range_end; unsigned long flags; - raw_spin_lock_irqsave(&l2x0_lock, flags); - writel_relaxed(start, l2x0_base + AURORA_RANGE_BASE_ADDR_REG); - writel_relaxed(end, l2x0_base + offset); - raw_spin_unlock_irqrestore(&l2x0_lock, flags); - - cache_sync(); -} - -static void aurora_inv_range(unsigned long start, unsigned long end) -{ /* * round start and end adresses up to cache line size */ @@ -1276,15 +1289,24 @@ static void aurora_inv_range(unsigned long start, unsigned long end) end = ALIGN(end, CACHE_LINE_SIZE); /* - * Invalidate all full cache lines between 'start' and 'end'. + * perform operation on all full cache lines between 'start' and 'end' */ while (start < end) { - unsigned long range_end = calc_range_end(start, end); - aurora_pa_range(start, range_end - CACHE_LINE_SIZE, - AURORA_INVAL_RANGE_REG); + range_end = aurora_range_end(start, end); + + raw_spin_lock_irqsave(&l2x0_lock, flags); + writel_relaxed(start, base + AURORA_RANGE_BASE_ADDR_REG); + writel_relaxed(range_end - CACHE_LINE_SIZE, base + offset); + raw_spin_unlock_irqrestore(&l2x0_lock, flags); + + writel_relaxed(0, base + AURORA_SYNC_REG); start = range_end; } } +static void aurora_inv_range(unsigned long start, unsigned long end) +{ + aurora_pa_range(start, end, AURORA_INVAL_RANGE_REG); +} static void aurora_clean_range(unsigned long start, unsigned long end) { @@ -1292,52 +1314,53 @@ static void aurora_clean_range(unsigned long start, unsigned long end) * If L2 is forced to WT, the L2 will always be clean and we * don't need to do anything here. */ - if (!l2_wt_override) { - start &= ~(CACHE_LINE_SIZE - 1); - end = ALIGN(end, CACHE_LINE_SIZE); - while (start != end) { - unsigned long range_end = calc_range_end(start, end); - aurora_pa_range(start, range_end - CACHE_LINE_SIZE, - AURORA_CLEAN_RANGE_REG); - start = range_end; - } - } + if (!l2_wt_override) + aurora_pa_range(start, end, AURORA_CLEAN_RANGE_REG); } static void aurora_flush_range(unsigned long start, unsigned long end) { - start &= ~(CACHE_LINE_SIZE - 1); - end = ALIGN(end, CACHE_LINE_SIZE); - while (start != end) { - unsigned long range_end = calc_range_end(start, end); - /* - * If L2 is forced to WT, the L2 will always be clean and we - * just need to invalidate. - */ - if (l2_wt_override) - aurora_pa_range(start, range_end - CACHE_LINE_SIZE, - AURORA_INVAL_RANGE_REG); - else - aurora_pa_range(start, range_end - CACHE_LINE_SIZE, - AURORA_FLUSH_RANGE_REG); - start = range_end; - } + if (l2_wt_override) + aurora_pa_range(start, end, AURORA_INVAL_RANGE_REG); + else + aurora_pa_range(start, end, AURORA_FLUSH_RANGE_REG); } -static void aurora_save(void __iomem *base) +static void aurora_flush_all(void) { - l2x0_saved_regs.ctrl = readl_relaxed(base + L2X0_CTRL); - l2x0_saved_regs.aux_ctrl = readl_relaxed(base + L2X0_AUX_CTRL); + void __iomem *base = l2x0_base; + unsigned long flags; + + /* clean all ways */ + raw_spin_lock_irqsave(&l2x0_lock, flags); + __l2c_op_way(base + L2X0_CLEAN_INV_WAY); + raw_spin_unlock_irqrestore(&l2x0_lock, flags); + + writel_relaxed(0, base + AURORA_SYNC_REG); } -static void aurora_resume(void) +static void aurora_cache_sync(void) +{ + writel_relaxed(0, l2x0_base + AURORA_SYNC_REG); +} + +static void aurora_disable(void) { void __iomem *base = l2x0_base; + unsigned long flags; - if (!(readl(base + L2X0_CTRL) & L2X0_CTRL_EN)) { - writel_relaxed(l2x0_saved_regs.aux_ctrl, base + L2X0_AUX_CTRL); - writel_relaxed(l2x0_saved_regs.ctrl, base + L2X0_CTRL); - } + raw_spin_lock_irqsave(&l2x0_lock, flags); + __l2c_op_way(base + L2X0_CLEAN_INV_WAY); + writel_relaxed(0, base + AURORA_SYNC_REG); + l2c_write_sec(0, base, L2X0_CTRL); + dsb(st); + raw_spin_unlock_irqrestore(&l2x0_lock, flags); +} + +static void aurora_save(void __iomem *base) +{ + l2x0_saved_regs.ctrl = readl_relaxed(base + L2X0_CTRL); + l2x0_saved_regs.aux_ctrl = readl_relaxed(base + L2X0_AUX_CTRL); } /* @@ -1398,10 +1421,10 @@ static const struct l2c_init_data of_aurora_with_outer_data __initconst = { .inv_range = aurora_inv_range, .clean_range = aurora_clean_range, .flush_range = aurora_flush_range, - .flush_all = l2x0_flush_all, - .disable = l2x0_disable, - .sync = l2x0_cache_sync, - .resume = aurora_resume, + .flush_all = aurora_flush_all, + .disable = aurora_disable, + .sync = aurora_cache_sync, + .resume = l2c_resume, }, }; @@ -1414,7 +1437,7 @@ static const struct l2c_init_data of_aurora_no_outer_data __initconst = { .fixup = aurora_fixup, .save = aurora_save, .outer_cache = { - .resume = aurora_resume, + .resume = l2c_resume, }, }; @@ -1562,6 +1585,7 @@ static const struct l2c_init_data of_bcm_l2x0_data __initconst = { .of_parse = l2c310_of_parse, .enable = l2c310_enable, .save = l2c310_save, + .configure = l2c310_configure, .outer_cache = { .inv_range = bcm_inv_range, .clean_range = bcm_clean_range, @@ -1583,18 +1607,12 @@ static void __init tauros3_save(void __iomem *base) readl_relaxed(base + L310_PREFETCH_CTRL); } -static void tauros3_resume(void) +static void tauros3_configure(void __iomem *base) { - void __iomem *base = l2x0_base; - - if (!(readl_relaxed(base + L2X0_CTRL) & L2X0_CTRL_EN)) { - writel_relaxed(l2x0_saved_regs.aux2_ctrl, - base + TAUROS3_AUX2_CTRL); - writel_relaxed(l2x0_saved_regs.prefetch_ctrl, - base + L310_PREFETCH_CTRL); - - l2c_enable(base, l2x0_saved_regs.aux_ctrl, 8); - } + writel_relaxed(l2x0_saved_regs.aux2_ctrl, + base + TAUROS3_AUX2_CTRL); + writel_relaxed(l2x0_saved_regs.prefetch_ctrl, + base + L310_PREFETCH_CTRL); } static const struct l2c_init_data of_tauros3_data __initconst = { @@ -1603,9 +1621,10 @@ static const struct l2c_init_data of_tauros3_data __initconst = { .num_lock = 8, .enable = l2c_enable, .save = tauros3_save, + .configure = tauros3_configure, /* Tauros3 broadcasts L1 cache operations to L2 */ .outer_cache = { - .resume = tauros3_resume, + .resume = l2c_resume, }, }; @@ -1661,6 +1680,10 @@ int __init l2x0_of_init(u32 aux_val, u32 aux_mask) if (!of_property_read_bool(np, "cache-unified")) pr_err("L2C: device tree omits to specify unified cache\n"); + /* Read back current (default) hardware configuration */ + if (data->save) + data->save(l2x0_base); + /* L2 configuration can only be changed if the cache is disabled */ if (!(readl_relaxed(l2x0_base + L2X0_CTRL) & L2X0_CTRL_EN)) if (data->of_parse) @@ -1671,8 +1694,6 @@ int __init l2x0_of_init(u32 aux_val, u32 aux_mask) else cache_id = readl_relaxed(l2x0_base + L2X0_CACHE_ID); - __l2c_init(data, aux_val, aux_mask, cache_id); - - return 0; + return __l2c_init(data, aux_val, aux_mask, cache_id); } #endif diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 2495c8cb47ba..1609b022a72f 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -319,10 +319,7 @@ void __init arm_memblock_init(const struct machine_desc *mdesc) early_init_fdt_scan_reserved_mem(); - /* - * reserve memory for DMA contigouos allocations, - * must come from DMA area inside low memory - */ + /* reserve memory for DMA contiguous allocations */ dma_contiguous_reserve(arm_dma_limit); arm_memblock_steal_permitted = false; diff --git a/arch/arm/probes/Makefile b/arch/arm/probes/Makefile new file mode 100644 index 000000000000..aa1f8590dcdd --- /dev/null +++ b/arch/arm/probes/Makefile @@ -0,0 +1,7 @@ +obj-$(CONFIG_UPROBES) += decode.o decode-arm.o uprobes/ +obj-$(CONFIG_KPROBES) += decode.o kprobes/ +ifdef CONFIG_THUMB2_KERNEL +obj-$(CONFIG_KPROBES) += decode-thumb.o +else +obj-$(CONFIG_KPROBES) += decode-arm.o +endif diff --git a/arch/arm/kernel/probes-arm.c b/arch/arm/probes/decode-arm.c index 8eaef81d8344..f72c33a2dcfb 100644 --- a/arch/arm/kernel/probes-arm.c +++ b/arch/arm/probes/decode-arm.c @@ -1,5 +1,6 @@ /* - * arch/arm/kernel/probes-arm.c + * + * arch/arm/probes/decode-arm.c * * Some code moved here from arch/arm/kernel/kprobes-arm.c * @@ -20,8 +21,8 @@ #include <linux/stddef.h> #include <linux/ptrace.h> -#include "probes.h" -#include "probes-arm.h" +#include "decode.h" +#include "decode-arm.h" #define sign_extend(x, signbit) ((x) | (0 - ((x) & (1 << (signbit))))) @@ -369,17 +370,17 @@ static const union decode_item arm_cccc_001x_table[] = { /* MOVW cccc 0011 0000 xxxx xxxx xxxx xxxx xxxx */ /* MOVT cccc 0011 0100 xxxx xxxx xxxx xxxx xxxx */ - DECODE_EMULATEX (0x0fb00000, 0x03000000, PROBES_DATA_PROCESSING_IMM, + DECODE_EMULATEX (0x0fb00000, 0x03000000, PROBES_MOV_HALFWORD, REGS(0, NOPC, 0, 0, 0)), /* YIELD cccc 0011 0010 0000 xxxx xxxx 0000 0001 */ DECODE_OR (0x0fff00ff, 0x03200001), /* SEV cccc 0011 0010 0000 xxxx xxxx 0000 0100 */ - DECODE_EMULATE (0x0fff00ff, 0x03200004, PROBES_EMULATE_NONE), + DECODE_EMULATE (0x0fff00ff, 0x03200004, PROBES_SEV), /* NOP cccc 0011 0010 0000 xxxx xxxx 0000 0000 */ /* WFE cccc 0011 0010 0000 xxxx xxxx 0000 0010 */ /* WFI cccc 0011 0010 0000 xxxx xxxx 0000 0011 */ - DECODE_SIMULATE (0x0fff00fc, 0x03200000, PROBES_SIMULATE_NOP), + DECODE_SIMULATE (0x0fff00fc, 0x03200000, PROBES_WFE), /* DBG cccc 0011 0010 0000 xxxx xxxx ffff xxxx */ /* unallocated hints cccc 0011 0010 0000 xxxx xxxx xxxx xxxx */ /* MSR (immediate) cccc 0011 0x10 xxxx xxxx xxxx xxxx xxxx */ @@ -725,10 +726,11 @@ static void __kprobes arm_singlestep(probes_opcode_t insn, */ enum probes_insn __kprobes arm_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi, - bool emulate, const union decode_action *actions) + bool emulate, const union decode_action *actions, + const struct decode_checker *checkers[]) { asi->insn_singlestep = arm_singlestep; asi->insn_check_cc = probes_condition_checks[insn>>28]; return probes_decode_insn(insn, asi, probes_decode_arm_table, false, - emulate, actions); + emulate, actions, checkers); } diff --git a/arch/arm/kernel/probes-arm.h b/arch/arm/probes/decode-arm.h index ace6572f6e26..b3b80f6d414b 100644 --- a/arch/arm/kernel/probes-arm.h +++ b/arch/arm/probes/decode-arm.h @@ -1,5 +1,5 @@ /* - * arch/arm/kernel/probes-arm.h + * arch/arm/probes/decode-arm.h * * Copyright 2013 Linaro Ltd. * Written by: David A. Long @@ -15,9 +15,9 @@ #ifndef _ARM_KERNEL_PROBES_ARM_H #define _ARM_KERNEL_PROBES_ARM_H +#include "decode.h" + enum probes_arm_action { - PROBES_EMULATE_NONE, - PROBES_SIMULATE_NOP, PROBES_PRELOAD_IMM, PROBES_PRELOAD_REG, PROBES_BRANCH_IMM, @@ -68,6 +68,7 @@ extern const union decode_item probes_decode_arm_table[]; enum probes_insn arm_probes_decode_insn(probes_opcode_t, struct arch_probes_insn *, bool emulate, - const union decode_action *actions); + const union decode_action *actions, + const struct decode_checker *checkers[]); #endif diff --git a/arch/arm/kernel/probes-thumb.c b/arch/arm/probes/decode-thumb.c index 4131351e812f..985e7dd4cac6 100644 --- a/arch/arm/kernel/probes-thumb.c +++ b/arch/arm/probes/decode-thumb.c @@ -1,5 +1,5 @@ /* - * arch/arm/kernel/probes-thumb.c + * arch/arm/probes/decode-thumb.c * * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>. * @@ -12,8 +12,8 @@ #include <linux/kernel.h> #include <linux/module.h> -#include "probes.h" -#include "probes-thumb.h" +#include "decode.h" +#include "decode-thumb.h" static const union decode_item t32_table_1110_100x_x0xx[] = { @@ -863,20 +863,22 @@ static void __kprobes thumb32_singlestep(probes_opcode_t opcode, enum probes_insn __kprobes thumb16_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi, - bool emulate, const union decode_action *actions) + bool emulate, const union decode_action *actions, + const struct decode_checker *checkers[]) { asi->insn_singlestep = thumb16_singlestep; asi->insn_check_cc = thumb_check_cc; return probes_decode_insn(insn, asi, probes_decode_thumb16_table, true, - emulate, actions); + emulate, actions, checkers); } enum probes_insn __kprobes thumb32_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi, - bool emulate, const union decode_action *actions) + bool emulate, const union decode_action *actions, + const struct decode_checker *checkers[]) { asi->insn_singlestep = thumb32_singlestep; asi->insn_check_cc = thumb_check_cc; return probes_decode_insn(insn, asi, probes_decode_thumb32_table, true, - emulate, actions); + emulate, actions, checkers); } diff --git a/arch/arm/kernel/probes-thumb.h b/arch/arm/probes/decode-thumb.h index 7c6f6ebe514f..8457add0a2d8 100644 --- a/arch/arm/kernel/probes-thumb.h +++ b/arch/arm/probes/decode-thumb.h @@ -1,5 +1,5 @@ /* - * arch/arm/kernel/probes-thumb.h + * arch/arm/probes/decode-thumb.h * * Copyright 2013 Linaro Ltd. * Written by: David A. Long @@ -15,6 +15,8 @@ #ifndef _ARM_KERNEL_PROBES_THUMB_H #define _ARM_KERNEL_PROBES_THUMB_H +#include "decode.h" + /* * True if current instruction is in an IT block. */ @@ -89,9 +91,11 @@ extern const union decode_item probes_decode_thumb16_table[]; enum probes_insn __kprobes thumb16_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi, - bool emulate, const union decode_action *actions); + bool emulate, const union decode_action *actions, + const struct decode_checker *checkers[]); enum probes_insn __kprobes thumb32_probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi, - bool emulate, const union decode_action *actions); + bool emulate, const union decode_action *actions, + const struct decode_checker *checkers[]); #endif diff --git a/arch/arm/kernel/probes.c b/arch/arm/probes/decode.c index a8ab540d7e73..880ebe0cdf19 100644 --- a/arch/arm/kernel/probes.c +++ b/arch/arm/probes/decode.c @@ -1,5 +1,5 @@ /* - * arch/arm/kernel/probes.c + * arch/arm/probes/decode.c * * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>. * @@ -17,7 +17,7 @@ #include <asm/ptrace.h> #include <linux/bug.h> -#include "probes.h" +#include "decode.h" #ifndef find_str_pc_offset @@ -342,6 +342,31 @@ static const int decode_struct_sizes[NUM_DECODE_TYPES] = { [DECODE_TYPE_REJECT] = sizeof(struct decode_reject) }; +static int run_checkers(const struct decode_checker *checkers[], + int action, probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + const struct decode_checker **p; + + if (!checkers) + return INSN_GOOD; + + p = checkers; + while (*p != NULL) { + int retval; + probes_check_t *checker_func = (*p)[action].checker; + + retval = INSN_GOOD; + if (checker_func) + retval = checker_func(insn, asi, h); + if (retval == INSN_REJECTED) + return retval; + p++; + } + return INSN_GOOD; +} + /* * probes_decode_insn operates on data tables in order to decode an ARM * architecture instruction onto which a kprobe has been placed. @@ -388,11 +413,34 @@ static const int decode_struct_sizes[NUM_DECODE_TYPES] = { int __kprobes probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi, const union decode_item *table, bool thumb, - bool emulate, const union decode_action *actions) + bool emulate, const union decode_action *actions, + const struct decode_checker *checkers[]) { const struct decode_header *h = (struct decode_header *)table; const struct decode_header *next; bool matched = false; + /* + * @insn can be modified by decode_regs. Save its original + * value for checkers. + */ + probes_opcode_t origin_insn = insn; + + /* + * stack_space is initialized to 0 here. Checker functions + * should update is value if they find this is a stack store + * instruction: positive value means bytes of stack usage, + * negitive value means unable to determine stack usage + * statically. For instruction doesn't store to stack, checker + * do nothing with it. + */ + asi->stack_space = 0; + + /* + * Similarly to stack_space, register_usage_flags is filled by + * checkers. Its default value is set to ~0, which is 'all + * registers are used', to prevent any potential optimization. + */ + asi->register_usage_flags = ~0UL; if (emulate) insn = prepare_emulated_insn(insn, asi, thumb); @@ -422,24 +470,41 @@ probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi, } case DECODE_TYPE_CUSTOM: { + int err; struct decode_custom *d = (struct decode_custom *)h; - return actions[d->decoder.action].decoder(insn, asi, h); + int action = d->decoder.action; + + err = run_checkers(checkers, action, origin_insn, asi, h); + if (err == INSN_REJECTED) + return INSN_REJECTED; + return actions[action].decoder(insn, asi, h); } case DECODE_TYPE_SIMULATE: { + int err; struct decode_simulate *d = (struct decode_simulate *)h; - asi->insn_handler = actions[d->handler.action].handler; + int action = d->handler.action; + + err = run_checkers(checkers, action, origin_insn, asi, h); + if (err == INSN_REJECTED) + return INSN_REJECTED; + asi->insn_handler = actions[action].handler; return INSN_GOOD_NO_SLOT; } case DECODE_TYPE_EMULATE: { + int err; struct decode_emulate *d = (struct decode_emulate *)h; + int action = d->handler.action; + + err = run_checkers(checkers, action, origin_insn, asi, h); + if (err == INSN_REJECTED) + return INSN_REJECTED; if (!emulate) - return actions[d->handler.action].decoder(insn, - asi, h); + return actions[action].decoder(insn, asi, h); - asi->insn_handler = actions[d->handler.action].handler; + asi->insn_handler = actions[action].handler; set_emulated_insn(insn, asi, thumb); return INSN_GOOD; } diff --git a/arch/arm/kernel/probes.h b/arch/arm/probes/decode.h index dba9f2466a93..f9b08ba7fe73 100644 --- a/arch/arm/kernel/probes.h +++ b/arch/arm/probes/decode.h @@ -1,5 +1,5 @@ /* - * arch/arm/kernel/probes.h + * arch/arm/probes/decode.h * * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>. * @@ -314,6 +314,14 @@ union decode_action { probes_custom_decode_t *decoder; }; +typedef enum probes_insn (probes_check_t)(probes_opcode_t, + struct arch_probes_insn *, + const struct decode_header *); + +struct decode_checker { + probes_check_t *checker; +}; + #define DECODE_END \ {.bits = DECODE_TYPE_END} @@ -402,6 +410,7 @@ probes_insn_handler_t probes_emulate_none; int __kprobes probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi, const union decode_item *table, bool thumb, bool emulate, - const union decode_action *actions); + const union decode_action *actions, + const struct decode_checker **checkers); #endif diff --git a/arch/arm/probes/kprobes/Makefile b/arch/arm/probes/kprobes/Makefile new file mode 100644 index 000000000000..76a36bf102b7 --- /dev/null +++ b/arch/arm/probes/kprobes/Makefile @@ -0,0 +1,12 @@ +obj-$(CONFIG_KPROBES) += core.o actions-common.o checkers-common.o +obj-$(CONFIG_ARM_KPROBES_TEST) += test-kprobes.o +test-kprobes-objs := test-core.o + +ifdef CONFIG_THUMB2_KERNEL +obj-$(CONFIG_KPROBES) += actions-thumb.o checkers-thumb.o +test-kprobes-objs += test-thumb.o +else +obj-$(CONFIG_KPROBES) += actions-arm.o checkers-arm.o +obj-$(CONFIG_OPTPROBES) += opt-arm.o +test-kprobes-objs += test-arm.o +endif diff --git a/arch/arm/kernel/kprobes-arm.c b/arch/arm/probes/kprobes/actions-arm.c index ac300c60d656..b9056d649607 100644 --- a/arch/arm/kernel/kprobes-arm.c +++ b/arch/arm/probes/kprobes/actions-arm.c @@ -1,5 +1,5 @@ /* - * arch/arm/kernel/kprobes-decode.c + * arch/arm/probes/kprobes/actions-arm.c * * Copyright (C) 2006, 2007 Motorola Inc. * @@ -62,8 +62,9 @@ #include <linux/kprobes.h> #include <linux/ptrace.h> -#include "kprobes.h" -#include "probes-arm.h" +#include "../decode-arm.h" +#include "core.h" +#include "checkers.h" #if __LINUX_ARM_ARCH__ >= 6 #define BLX(reg) "blx "reg" \n\t" @@ -302,8 +303,6 @@ emulate_rdlo12rdhi16rn0rm8_rwflags_nopc(probes_opcode_t insn, } const union decode_action kprobes_arm_actions[NUM_PROBES_ARM_ACTIONS] = { - [PROBES_EMULATE_NONE] = {.handler = probes_emulate_none}, - [PROBES_SIMULATE_NOP] = {.handler = probes_simulate_nop}, [PROBES_PRELOAD_IMM] = {.handler = probes_simulate_nop}, [PROBES_PRELOAD_REG] = {.handler = probes_simulate_nop}, [PROBES_BRANCH_IMM] = {.handler = simulate_blx1}, @@ -341,3 +340,5 @@ const union decode_action kprobes_arm_actions[NUM_PROBES_ARM_ACTIONS] = { [PROBES_BRANCH] = {.handler = simulate_bbl}, [PROBES_LDMSTM] = {.decoder = kprobe_decode_ldmstm} }; + +const struct decode_checker *kprobes_arm_checkers[] = {arm_stack_checker, arm_regs_checker, NULL}; diff --git a/arch/arm/kernel/kprobes-common.c b/arch/arm/probes/kprobes/actions-common.c index 0bf5d64eba1d..bd20a71cd34a 100644 --- a/arch/arm/kernel/kprobes-common.c +++ b/arch/arm/probes/kprobes/actions-common.c @@ -1,5 +1,5 @@ /* - * arch/arm/kernel/kprobes-common.c + * arch/arm/probes/kprobes/actions-common.c * * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>. * @@ -15,7 +15,7 @@ #include <linux/kprobes.h> #include <asm/opcodes.h> -#include "kprobes.h" +#include "core.h" static void __kprobes simulate_ldm1stm1(probes_opcode_t insn, diff --git a/arch/arm/kernel/kprobes-thumb.c b/arch/arm/probes/kprobes/actions-thumb.c index 9495d7f3516f..07cfd9bef340 100644 --- a/arch/arm/kernel/kprobes-thumb.c +++ b/arch/arm/probes/kprobes/actions-thumb.c @@ -1,5 +1,5 @@ /* - * arch/arm/kernel/kprobes-thumb.c + * arch/arm/probes/kprobes/actions-thumb.c * * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>. * @@ -13,8 +13,9 @@ #include <linux/ptrace.h> #include <linux/kprobes.h> -#include "kprobes.h" -#include "probes-thumb.h" +#include "../decode-thumb.h" +#include "core.h" +#include "checkers.h" /* These emulation encodings are functionally equivalent... */ #define t32_emulate_rd8rn16rm0ra12_noflags \ @@ -664,3 +665,6 @@ const union decode_action kprobes_t32_actions[NUM_PROBES_T32_ACTIONS] = { [PROBES_T32_MUL_ADD_LONG] = { .handler = t32_emulate_rdlo12rdhi8rn16rm0_noflags}, }; + +const struct decode_checker *kprobes_t32_checkers[] = {t32_stack_checker, NULL}; +const struct decode_checker *kprobes_t16_checkers[] = {t16_stack_checker, NULL}; diff --git a/arch/arm/probes/kprobes/checkers-arm.c b/arch/arm/probes/kprobes/checkers-arm.c new file mode 100644 index 000000000000..7b9817333b68 --- /dev/null +++ b/arch/arm/probes/kprobes/checkers-arm.c @@ -0,0 +1,192 @@ +/* + * arch/arm/probes/kprobes/checkers-arm.c + * + * Copyright (C) 2014 Huawei Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include <linux/kernel.h> +#include "../decode.h" +#include "../decode-arm.h" +#include "checkers.h" + +static enum probes_insn __kprobes arm_check_stack(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + /* + * PROBES_LDRSTRD, PROBES_LDMSTM, PROBES_STORE, + * PROBES_STORE_EXTRA may get here. Simply mark all normal + * insns as STACK_USE_NONE. + */ + static const union decode_item table[] = { + /* + * 'STR{,D,B,H}, Rt, [Rn, Rm]' should be marked as UNKNOWN + * if Rn or Rm is SP. + * x + * STR (register) cccc 011x x0x0 xxxx xxxx xxxx xxxx xxxx + * STRB (register) cccc 011x x1x0 xxxx xxxx xxxx xxxx xxxx + */ + DECODE_OR (0x0e10000f, 0x0600000d), + DECODE_OR (0x0e1f0000, 0x060d0000), + + /* + * x + * STRD (register) cccc 000x x0x0 xxxx xxxx xxxx 1111 xxxx + * STRH (register) cccc 000x x0x0 xxxx xxxx xxxx 1011 xxxx + */ + DECODE_OR (0x0e5000bf, 0x000000bd), + DECODE_CUSTOM (0x0e5f00b0, 0x000d00b0, STACK_USE_UNKNOWN), + + /* + * For PROBES_LDMSTM, only stmdx sp, [...] need to examine + * + * Bit B/A (bit 24) encodes arithmetic operation order. 1 means + * before, 0 means after. + * Bit I/D (bit 23) encodes arithmetic operation. 1 means + * increment, 0 means decrement. + * + * So: + * B I + * / / + * A D | Rn | + * STMDX SP, [...] cccc 100x 00x0 xxxx xxxx xxxx xxxx xxxx + */ + DECODE_CUSTOM (0x0edf0000, 0x080d0000, STACK_USE_STMDX), + + /* P U W | Rn | Rt | imm12 |*/ + /* STR (immediate) cccc 010x x0x0 1101 xxxx xxxx xxxx xxxx */ + /* STRB (immediate) cccc 010x x1x0 1101 xxxx xxxx xxxx xxxx */ + /* P U W | Rn | Rt |imm4| |imm4|*/ + /* STRD (immediate) cccc 000x x1x0 1101 xxxx xxxx 1111 xxxx */ + /* STRH (immediate) cccc 000x x1x0 1101 xxxx xxxx 1011 xxxx */ + /* + * index = (P == '1'); add = (U == '1'). + * Above insns with: + * index == 0 (str{,d,h} rx, [sp], #+/-imm) or + * add == 1 (str{,d,h} rx, [sp, #+<imm>]) + * should be STACK_USE_NONE. + * Only str{,b,d,h} rx,[sp,#-n] (P == 1 and U == 0) are + * required to be examined. + */ + /* STR{,B} Rt,[SP,#-n] cccc 0101 0xx0 1101 xxxx xxxx xxxx xxxx */ + DECODE_CUSTOM (0x0f9f0000, 0x050d0000, STACK_USE_FIXED_XXX), + + /* STR{D,H} Rt,[SP,#-n] cccc 0001 01x0 1101 xxxx xxxx 1x11 xxxx */ + DECODE_CUSTOM (0x0fdf00b0, 0x014d00b0, STACK_USE_FIXED_X0X), + + /* fall through */ + DECODE_CUSTOM (0, 0, STACK_USE_NONE), + DECODE_END + }; + + return probes_decode_insn(insn, asi, table, false, false, stack_check_actions, NULL); +} + +const struct decode_checker arm_stack_checker[NUM_PROBES_ARM_ACTIONS] = { + [PROBES_LDRSTRD] = {.checker = arm_check_stack}, + [PROBES_STORE_EXTRA] = {.checker = arm_check_stack}, + [PROBES_STORE] = {.checker = arm_check_stack}, + [PROBES_LDMSTM] = {.checker = arm_check_stack}, +}; + +static enum probes_insn __kprobes arm_check_regs_nouse(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + asi->register_usage_flags = 0; + return INSN_GOOD; +} + +static enum probes_insn arm_check_regs_normal(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + u32 regs = h->type_regs.bits >> DECODE_TYPE_BITS; + int i; + + asi->register_usage_flags = 0; + for (i = 0; i < 5; regs >>= 4, insn >>= 4, i++) + if (regs & 0xf) + asi->register_usage_flags |= 1 << (insn & 0xf); + + return INSN_GOOD; +} + + +static enum probes_insn arm_check_regs_ldmstm(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + unsigned int reglist = insn & 0xffff; + unsigned int rn = (insn >> 16) & 0xf; + asi->register_usage_flags = reglist | (1 << rn); + return INSN_GOOD; +} + +static enum probes_insn arm_check_regs_mov_ip_sp(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + /* Instruction is 'mov ip, sp' i.e. 'mov r12, r13' */ + asi->register_usage_flags = (1 << 12) | (1<< 13); + return INSN_GOOD; +} + +/* + * | Rn |Rt/d| | Rm | + * LDRD (register) cccc 000x x0x0 xxxx xxxx xxxx 1101 xxxx + * STRD (register) cccc 000x x0x0 xxxx xxxx xxxx 1111 xxxx + * | Rn |Rt/d| |imm4L| + * LDRD (immediate) cccc 000x x1x0 xxxx xxxx xxxx 1101 xxxx + * STRD (immediate) cccc 000x x1x0 xxxx xxxx xxxx 1111 xxxx + * + * Such instructions access Rt/d and its next register, so different + * from others, a specific checker is required to handle this extra + * implicit register usage. + */ +static enum probes_insn arm_check_regs_ldrdstrd(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + int rdt = (insn >> 12) & 0xf; + arm_check_regs_normal(insn, asi, h); + asi->register_usage_flags |= 1 << (rdt + 1); + return INSN_GOOD; +} + + +const struct decode_checker arm_regs_checker[NUM_PROBES_ARM_ACTIONS] = { + [PROBES_MRS] = {.checker = arm_check_regs_normal}, + [PROBES_SATURATING_ARITHMETIC] = {.checker = arm_check_regs_normal}, + [PROBES_MUL1] = {.checker = arm_check_regs_normal}, + [PROBES_MUL2] = {.checker = arm_check_regs_normal}, + [PROBES_MUL_ADD_LONG] = {.checker = arm_check_regs_normal}, + [PROBES_MUL_ADD] = {.checker = arm_check_regs_normal}, + [PROBES_LOAD] = {.checker = arm_check_regs_normal}, + [PROBES_LOAD_EXTRA] = {.checker = arm_check_regs_normal}, + [PROBES_STORE] = {.checker = arm_check_regs_normal}, + [PROBES_STORE_EXTRA] = {.checker = arm_check_regs_normal}, + [PROBES_DATA_PROCESSING_REG] = {.checker = arm_check_regs_normal}, + [PROBES_DATA_PROCESSING_IMM] = {.checker = arm_check_regs_normal}, + [PROBES_SEV] = {.checker = arm_check_regs_nouse}, + [PROBES_WFE] = {.checker = arm_check_regs_nouse}, + [PROBES_SATURATE] = {.checker = arm_check_regs_normal}, + [PROBES_REV] = {.checker = arm_check_regs_normal}, + [PROBES_MMI] = {.checker = arm_check_regs_normal}, + [PROBES_PACK] = {.checker = arm_check_regs_normal}, + [PROBES_EXTEND] = {.checker = arm_check_regs_normal}, + [PROBES_EXTEND_ADD] = {.checker = arm_check_regs_normal}, + [PROBES_BITFIELD] = {.checker = arm_check_regs_normal}, + [PROBES_LDMSTM] = {.checker = arm_check_regs_ldmstm}, + [PROBES_MOV_IP_SP] = {.checker = arm_check_regs_mov_ip_sp}, + [PROBES_LDRSTRD] = {.checker = arm_check_regs_ldrdstrd}, +}; diff --git a/arch/arm/probes/kprobes/checkers-common.c b/arch/arm/probes/kprobes/checkers-common.c new file mode 100644 index 000000000000..971119c29474 --- /dev/null +++ b/arch/arm/probes/kprobes/checkers-common.c @@ -0,0 +1,101 @@ +/* + * arch/arm/probes/kprobes/checkers-common.c + * + * Copyright (C) 2014 Huawei Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include <linux/kernel.h> +#include "../decode.h" +#include "../decode-arm.h" +#include "checkers.h" + +enum probes_insn checker_stack_use_none(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + asi->stack_space = 0; + return INSN_GOOD_NO_SLOT; +} + +enum probes_insn checker_stack_use_unknown(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + asi->stack_space = -1; + return INSN_GOOD_NO_SLOT; +} + +#ifdef CONFIG_THUMB2_KERNEL +enum probes_insn checker_stack_use_imm_0xx(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + int imm = insn & 0xff; + asi->stack_space = imm; + return INSN_GOOD_NO_SLOT; +} + +/* + * Different from other insn uses imm8, the real addressing offset of + * STRD in T32 encoding should be imm8 * 4. See ARMARM description. + */ +enum probes_insn checker_stack_use_t32strd(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + int imm = insn & 0xff; + asi->stack_space = imm << 2; + return INSN_GOOD_NO_SLOT; +} +#else +enum probes_insn checker_stack_use_imm_x0x(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + int imm = ((insn & 0xf00) >> 4) + (insn & 0xf); + asi->stack_space = imm; + return INSN_GOOD_NO_SLOT; +} +#endif + +enum probes_insn checker_stack_use_imm_xxx(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + int imm = insn & 0xfff; + asi->stack_space = imm; + return INSN_GOOD_NO_SLOT; +} + +enum probes_insn checker_stack_use_stmdx(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + unsigned int reglist = insn & 0xffff; + int pbit = insn & (1 << 24); + asi->stack_space = (hweight32(reglist) - (!pbit ? 1 : 0)) * 4; + + return INSN_GOOD_NO_SLOT; +} + +const union decode_action stack_check_actions[] = { + [STACK_USE_NONE] = {.decoder = checker_stack_use_none}, + [STACK_USE_UNKNOWN] = {.decoder = checker_stack_use_unknown}, +#ifdef CONFIG_THUMB2_KERNEL + [STACK_USE_FIXED_0XX] = {.decoder = checker_stack_use_imm_0xx}, + [STACK_USE_T32STRD] = {.decoder = checker_stack_use_t32strd}, +#else + [STACK_USE_FIXED_X0X] = {.decoder = checker_stack_use_imm_x0x}, +#endif + [STACK_USE_FIXED_XXX] = {.decoder = checker_stack_use_imm_xxx}, + [STACK_USE_STMDX] = {.decoder = checker_stack_use_stmdx}, +}; diff --git a/arch/arm/probes/kprobes/checkers-thumb.c b/arch/arm/probes/kprobes/checkers-thumb.c new file mode 100644 index 000000000000..d608e3b9017a --- /dev/null +++ b/arch/arm/probes/kprobes/checkers-thumb.c @@ -0,0 +1,110 @@ +/* + * arch/arm/probes/kprobes/checkers-thumb.c + * + * Copyright (C) 2014 Huawei Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include <linux/kernel.h> +#include "../decode.h" +#include "../decode-thumb.h" +#include "checkers.h" + +static enum probes_insn __kprobes t32_check_stack(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + /* + * PROBES_T32_LDMSTM, PROBES_T32_LDRDSTRD and PROBES_T32_LDRSTR + * may get here. Simply mark all normal insns as STACK_USE_NONE. + */ + static const union decode_item table[] = { + + /* + * First, filter out all ldr insns to make our life easier. + * Following load insns may come here: + * LDM, LDRD, LDR. + * In T32 encoding, bit 20 is enough for distinguishing + * load and store. All load insns have this bit set, when + * all store insns have this bit clear. + */ + DECODE_CUSTOM (0x00100000, 0x00100000, STACK_USE_NONE), + + /* + * Mark all 'STR{,B,H}, Rt, [Rn, Rm]' as STACK_USE_UNKNOWN + * if Rn or Rm is SP. T32 doesn't encode STRD. + */ + /* xx | Rn | Rt | | Rm |*/ + /* STR (register) 1111 1000 0100 xxxx xxxx 0000 00xx xxxx */ + /* STRB (register) 1111 1000 0000 xxxx xxxx 0000 00xx xxxx */ + /* STRH (register) 1111 1000 0010 xxxx xxxx 0000 00xx xxxx */ + /* INVALID INSN 1111 1000 0110 xxxx xxxx 0000 00xx xxxx */ + /* By Introducing INVALID INSN, bit 21 and 22 can be ignored. */ + DECODE_OR (0xff9f0fc0, 0xf80d0000), + DECODE_CUSTOM (0xff900fcf, 0xf800000d, STACK_USE_UNKNOWN), + + + /* xx | Rn | Rt | PUW| imm8 |*/ + /* STR (imm 8) 1111 1000 0100 1101 xxxx 110x xxxx xxxx */ + /* STRB (imm 8) 1111 1000 0000 1101 xxxx 110x xxxx xxxx */ + /* STRH (imm 8) 1111 1000 0010 1101 xxxx 110x xxxx xxxx */ + /* INVALID INSN 1111 1000 0110 1101 xxxx 110x xxxx xxxx */ + /* Only consider U == 0 and P == 1: strx rx, [sp, #-<imm>] */ + DECODE_CUSTOM (0xff9f0e00, 0xf80d0c00, STACK_USE_FIXED_0XX), + + /* For STR{,B,H} (imm 12), offset is always positive, so ignore them. */ + + /* P U W | Rn | Rt | Rt2| imm8 |*/ + /* STRD (immediate) 1110 1001 01x0 1101 xxxx xxxx xxxx xxxx */ + /* + * Only consider U == 0 and P == 1. + * Also note that STRD in T32 encoding is special: + * imm = ZeroExtend(imm8:'00', 32) + */ + DECODE_CUSTOM (0xffdf0000, 0xe94d0000, STACK_USE_T32STRD), + + /* | Rn | */ + /* STMDB 1110 1001 00x0 1101 xxxx xxxx xxxx xxxx */ + DECODE_CUSTOM (0xffdf0000, 0xe90d0000, STACK_USE_STMDX), + + /* fall through */ + DECODE_CUSTOM (0, 0, STACK_USE_NONE), + DECODE_END + }; + + return probes_decode_insn(insn, asi, table, false, false, stack_check_actions, NULL); +} + +const struct decode_checker t32_stack_checker[NUM_PROBES_T32_ACTIONS] = { + [PROBES_T32_LDMSTM] = {.checker = t32_check_stack}, + [PROBES_T32_LDRDSTRD] = {.checker = t32_check_stack}, + [PROBES_T32_LDRSTR] = {.checker = t32_check_stack}, +}; + +/* + * See following comments. This insn must be 'push'. + */ +static enum probes_insn __kprobes t16_check_stack(probes_opcode_t insn, + struct arch_probes_insn *asi, + const struct decode_header *h) +{ + unsigned int reglist = insn & 0x1ff; + asi->stack_space = hweight32(reglist) * 4; + return INSN_GOOD; +} + +/* + * T16 encoding is simple: only the 'push' insn can need extra stack space. + * Other insns, like str, can only use r0-r7 as Rn. + */ +const struct decode_checker t16_stack_checker[NUM_PROBES_T16_ACTIONS] = { + [PROBES_T16_PUSH] = {.checker = t16_check_stack}, +}; diff --git a/arch/arm/probes/kprobes/checkers.h b/arch/arm/probes/kprobes/checkers.h new file mode 100644 index 000000000000..cf6c9e74d666 --- /dev/null +++ b/arch/arm/probes/kprobes/checkers.h @@ -0,0 +1,55 @@ +/* + * arch/arm/probes/kprobes/checkers.h + * + * Copyright (C) 2014 Huawei Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +#ifndef _ARM_KERNEL_PROBES_CHECKERS_H +#define _ARM_KERNEL_PROBES_CHECKERS_H + +#include <linux/kernel.h> +#include <linux/types.h> +#include "../decode.h" + +extern probes_check_t checker_stack_use_none; +extern probes_check_t checker_stack_use_unknown; +#ifdef CONFIG_THUMB2_KERNEL +extern probes_check_t checker_stack_use_imm_0xx; +#else +extern probes_check_t checker_stack_use_imm_x0x; +#endif +extern probes_check_t checker_stack_use_imm_xxx; +extern probes_check_t checker_stack_use_stmdx; + +enum { + STACK_USE_NONE, + STACK_USE_UNKNOWN, +#ifdef CONFIG_THUMB2_KERNEL + STACK_USE_FIXED_0XX, + STACK_USE_T32STRD, +#else + STACK_USE_FIXED_X0X, +#endif + STACK_USE_FIXED_XXX, + STACK_USE_STMDX, + NUM_STACK_USE_TYPES +}; + +extern const union decode_action stack_check_actions[]; + +#ifndef CONFIG_THUMB2_KERNEL +extern const struct decode_checker arm_stack_checker[]; +extern const struct decode_checker arm_regs_checker[]; +#else +#endif +extern const struct decode_checker t32_stack_checker[]; +extern const struct decode_checker t16_stack_checker[]; +#endif diff --git a/arch/arm/kernel/kprobes.c b/arch/arm/probes/kprobes/core.c index 6d644202c8dc..a4ec240ee7ba 100644 --- a/arch/arm/kernel/kprobes.c +++ b/arch/arm/probes/kprobes/core.c @@ -30,11 +30,11 @@ #include <asm/cacheflush.h> #include <linux/percpu.h> #include <linux/bug.h> +#include <asm/patch.h> -#include "kprobes.h" -#include "probes-arm.h" -#include "probes-thumb.h" -#include "patch.h" +#include "../decode-arm.h" +#include "../decode-thumb.h" +#include "core.h" #define MIN_STACK_SIZE(addr) \ min((unsigned long)MAX_STACK_SIZE, \ @@ -61,6 +61,7 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) kprobe_decode_insn_t *decode_insn; const union decode_action *actions; int is; + const struct decode_checker **checkers; if (in_exception_text(addr)) return -EINVAL; @@ -74,9 +75,11 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) insn = __opcode_thumb32_compose(insn, inst2); decode_insn = thumb32_probes_decode_insn; actions = kprobes_t32_actions; + checkers = kprobes_t32_checkers; } else { decode_insn = thumb16_probes_decode_insn; actions = kprobes_t16_actions; + checkers = kprobes_t16_checkers; } #else /* !CONFIG_THUMB2_KERNEL */ thumb = false; @@ -85,12 +88,13 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) insn = __mem_to_opcode_arm(*p->addr); decode_insn = arm_probes_decode_insn; actions = kprobes_arm_actions; + checkers = kprobes_arm_checkers; #endif p->opcode = insn; p->ainsn.insn = tmp_insn; - switch ((*decode_insn)(insn, &p->ainsn, true, actions)) { + switch ((*decode_insn)(insn, &p->ainsn, true, actions, checkers)) { case INSN_REJECTED: /* not supported */ return -EINVAL; @@ -111,6 +115,15 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) break; } + /* + * Never instrument insn like 'str r0, [sp, +/-r1]'. Also, insn likes + * 'str r0, [sp, #-68]' should also be prohibited. + * See __und_svc. + */ + if ((p->ainsn.stack_space < 0) || + (p->ainsn.stack_space > MAX_STACK_SIZE)) + return -EINVAL; + return 0; } @@ -150,19 +163,31 @@ void __kprobes arch_arm_kprobe(struct kprobe *p) * memory. It is also needed to atomically set the two half-words of a 32-bit * Thumb breakpoint. */ -int __kprobes __arch_disarm_kprobe(void *p) -{ - struct kprobe *kp = p; - void *addr = (void *)((uintptr_t)kp->addr & ~1); - - __patch_text(addr, kp->opcode); +struct patch { + void *addr; + unsigned int insn; +}; +static int __kprobes_remove_breakpoint(void *data) +{ + struct patch *p = data; + __patch_text(p->addr, p->insn); return 0; } +void __kprobes kprobes_remove_breakpoint(void *addr, unsigned int insn) +{ + struct patch p = { + .addr = addr, + .insn = insn, + }; + stop_machine(__kprobes_remove_breakpoint, &p, cpu_online_mask); +} + void __kprobes arch_disarm_kprobe(struct kprobe *p) { - stop_machine(__arch_disarm_kprobe, p, cpu_online_mask); + kprobes_remove_breakpoint((void *)((uintptr_t)p->addr & ~1), + p->opcode); } void __kprobes arch_remove_kprobe(struct kprobe *p) diff --git a/arch/arm/kernel/kprobes.h b/arch/arm/probes/kprobes/core.h index 9a2712ecefc3..ec5d1f20a085 100644 --- a/arch/arm/kernel/kprobes.h +++ b/arch/arm/probes/kprobes/core.h @@ -19,7 +19,8 @@ #ifndef _ARM_KERNEL_KPROBES_H #define _ARM_KERNEL_KPROBES_H -#include "probes.h" +#include <asm/kprobes.h> +#include "../decode.h" /* * These undefined instructions must be unique and @@ -29,6 +30,8 @@ #define KPROBE_THUMB16_BREAKPOINT_INSTRUCTION 0xde18 #define KPROBE_THUMB32_BREAKPOINT_INSTRUCTION 0xf7f0a018 +extern void kprobes_remove_breakpoint(void *addr, unsigned int insn); + enum probes_insn __kprobes kprobe_decode_ldmstm(kprobe_opcode_t insn, struct arch_probes_insn *asi, const struct decode_header *h); @@ -36,16 +39,19 @@ kprobe_decode_ldmstm(kprobe_opcode_t insn, struct arch_probes_insn *asi, typedef enum probes_insn (kprobe_decode_insn_t)(probes_opcode_t, struct arch_probes_insn *, bool, - const union decode_action *); + const union decode_action *, + const struct decode_checker *[]); #ifdef CONFIG_THUMB2_KERNEL extern const union decode_action kprobes_t32_actions[]; extern const union decode_action kprobes_t16_actions[]; - +extern const struct decode_checker *kprobes_t32_checkers[]; +extern const struct decode_checker *kprobes_t16_checkers[]; #else /* !CONFIG_THUMB2_KERNEL */ extern const union decode_action kprobes_arm_actions[]; +extern const struct decode_checker *kprobes_arm_checkers[]; #endif diff --git a/arch/arm/probes/kprobes/opt-arm.c b/arch/arm/probes/kprobes/opt-arm.c new file mode 100644 index 000000000000..bcdecc25461b --- /dev/null +++ b/arch/arm/probes/kprobes/opt-arm.c @@ -0,0 +1,370 @@ +/* + * Kernel Probes Jump Optimization (Optprobes) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright (C) IBM Corporation, 2002, 2004 + * Copyright (C) Hitachi Ltd., 2012 + * Copyright (C) Huawei Inc., 2014 + */ + +#include <linux/kprobes.h> +#include <linux/jump_label.h> +#include <asm/kprobes.h> +#include <asm/cacheflush.h> +/* for arm_gen_branch */ +#include <asm/insn.h> +/* for patch_text */ +#include <asm/patch.h> + +#include "core.h" + +/* + * See register_usage_flags. If the probed instruction doesn't use PC, + * we can copy it into template and have it executed directly without + * simulation or emulation. + */ +#define ARM_REG_PC 15 +#define can_kprobe_direct_exec(m) (!test_bit(ARM_REG_PC, &(m))) + +/* + * NOTE: the first sub and add instruction will be modified according + * to the stack cost of the instruction. + */ +asm ( + ".global optprobe_template_entry\n" + "optprobe_template_entry:\n" + ".global optprobe_template_sub_sp\n" + "optprobe_template_sub_sp:" + " sub sp, sp, #0xff\n" + " stmia sp, {r0 - r14} \n" + ".global optprobe_template_add_sp\n" + "optprobe_template_add_sp:" + " add r3, sp, #0xff\n" + " str r3, [sp, #52]\n" + " mrs r4, cpsr\n" + " str r4, [sp, #64]\n" + " mov r1, sp\n" + " ldr r0, 1f\n" + " ldr r2, 2f\n" + /* + * AEABI requires an 8-bytes alignment stack. If + * SP % 8 != 0 (SP % 4 == 0 should be ensured), + * alloc more bytes here. + */ + " and r4, sp, #4\n" + " sub sp, sp, r4\n" +#if __LINUX_ARM_ARCH__ >= 5 + " blx r2\n" +#else + " mov lr, pc\n" + " mov pc, r2\n" +#endif + " add sp, sp, r4\n" + " ldr r1, [sp, #64]\n" + " tst r1, #"__stringify(PSR_T_BIT)"\n" + " ldrne r2, [sp, #60]\n" + " orrne r2, #1\n" + " strne r2, [sp, #60] @ set bit0 of PC for thumb\n" + " msr cpsr_cxsf, r1\n" + ".global optprobe_template_restore_begin\n" + "optprobe_template_restore_begin:\n" + " ldmia sp, {r0 - r15}\n" + ".global optprobe_template_restore_orig_insn\n" + "optprobe_template_restore_orig_insn:\n" + " nop\n" + ".global optprobe_template_restore_end\n" + "optprobe_template_restore_end:\n" + " nop\n" + ".global optprobe_template_val\n" + "optprobe_template_val:\n" + "1: .long 0\n" + ".global optprobe_template_call\n" + "optprobe_template_call:\n" + "2: .long 0\n" + ".global optprobe_template_end\n" + "optprobe_template_end:\n"); + +#define TMPL_VAL_IDX \ + ((unsigned long *)&optprobe_template_val - (unsigned long *)&optprobe_template_entry) +#define TMPL_CALL_IDX \ + ((unsigned long *)&optprobe_template_call - (unsigned long *)&optprobe_template_entry) +#define TMPL_END_IDX \ + ((unsigned long *)&optprobe_template_end - (unsigned long *)&optprobe_template_entry) +#define TMPL_ADD_SP \ + ((unsigned long *)&optprobe_template_add_sp - (unsigned long *)&optprobe_template_entry) +#define TMPL_SUB_SP \ + ((unsigned long *)&optprobe_template_sub_sp - (unsigned long *)&optprobe_template_entry) +#define TMPL_RESTORE_BEGIN \ + ((unsigned long *)&optprobe_template_restore_begin - (unsigned long *)&optprobe_template_entry) +#define TMPL_RESTORE_ORIGN_INSN \ + ((unsigned long *)&optprobe_template_restore_orig_insn - (unsigned long *)&optprobe_template_entry) +#define TMPL_RESTORE_END \ + ((unsigned long *)&optprobe_template_restore_end - (unsigned long *)&optprobe_template_entry) + +/* + * ARM can always optimize an instruction when using ARM ISA, except + * instructions like 'str r0, [sp, r1]' which store to stack and unable + * to determine stack space consumption statically. + */ +int arch_prepared_optinsn(struct arch_optimized_insn *optinsn) +{ + return optinsn->insn != NULL; +} + +/* + * In ARM ISA, kprobe opt always replace one instruction (4 bytes + * aligned and 4 bytes long). It is impossible to encounter another + * kprobe in the address range. So always return 0. + */ +int arch_check_optimized_kprobe(struct optimized_kprobe *op) +{ + return 0; +} + +/* Caller must ensure addr & 3 == 0 */ +static int can_optimize(struct kprobe *kp) +{ + if (kp->ainsn.stack_space < 0) + return 0; + /* + * 255 is the biggest imm can be used in 'sub r0, r0, #<imm>'. + * Number larger than 255 needs special encoding. + */ + if (kp->ainsn.stack_space > 255 - sizeof(struct pt_regs)) + return 0; + return 1; +} + +/* Free optimized instruction slot */ +static void +__arch_remove_optimized_kprobe(struct optimized_kprobe *op, int dirty) +{ + if (op->optinsn.insn) { + free_optinsn_slot(op->optinsn.insn, dirty); + op->optinsn.insn = NULL; + } +} + +extern void kprobe_handler(struct pt_regs *regs); + +static void +optimized_callback(struct optimized_kprobe *op, struct pt_regs *regs) +{ + unsigned long flags; + struct kprobe *p = &op->kp; + struct kprobe_ctlblk *kcb = get_kprobe_ctlblk(); + + /* Save skipped registers */ + regs->ARM_pc = (unsigned long)op->kp.addr; + regs->ARM_ORIG_r0 = ~0UL; + + local_irq_save(flags); + + if (kprobe_running()) { + kprobes_inc_nmissed_count(&op->kp); + } else { + __this_cpu_write(current_kprobe, &op->kp); + kcb->kprobe_status = KPROBE_HIT_ACTIVE; + opt_pre_handler(&op->kp, regs); + __this_cpu_write(current_kprobe, NULL); + } + + /* + * We singlestep the replaced instruction only when it can't be + * executed directly during restore. + */ + if (!p->ainsn.kprobe_direct_exec) + op->kp.ainsn.insn_singlestep(p->opcode, &p->ainsn, regs); + + local_irq_restore(flags); +} + +int arch_prepare_optimized_kprobe(struct optimized_kprobe *op, struct kprobe *orig) +{ + kprobe_opcode_t *code; + unsigned long rel_chk; + unsigned long val; + unsigned long stack_protect = sizeof(struct pt_regs); + + if (!can_optimize(orig)) + return -EILSEQ; + + code = get_optinsn_slot(); + if (!code) + return -ENOMEM; + + /* + * Verify if the address gap is in 32MiB range, because this uses + * a relative jump. + * + * kprobe opt use a 'b' instruction to branch to optinsn.insn. + * According to ARM manual, branch instruction is: + * + * 31 28 27 24 23 0 + * +------+---+---+---+---+----------------+ + * | cond | 1 | 0 | 1 | 0 | imm24 | + * +------+---+---+---+---+----------------+ + * + * imm24 is a signed 24 bits integer. The real branch offset is computed + * by: imm32 = SignExtend(imm24:'00', 32); + * + * So the maximum forward branch should be: + * (0x007fffff << 2) = 0x01fffffc = 0x1fffffc + * The maximum backword branch should be: + * (0xff800000 << 2) = 0xfe000000 = -0x2000000 + * + * We can simply check (rel & 0xfe000003): + * if rel is positive, (rel & 0xfe000000) shoule be 0 + * if rel is negitive, (rel & 0xfe000000) should be 0xfe000000 + * the last '3' is used for alignment checking. + */ + rel_chk = (unsigned long)((long)code - + (long)orig->addr + 8) & 0xfe000003; + + if ((rel_chk != 0) && (rel_chk != 0xfe000000)) { + /* + * Different from x86, we free code buf directly instead of + * calling __arch_remove_optimized_kprobe() because + * we have not fill any field in op. + */ + free_optinsn_slot(code, 0); + return -ERANGE; + } + + /* Copy arch-dep-instance from template. */ + memcpy(code, &optprobe_template_entry, + TMPL_END_IDX * sizeof(kprobe_opcode_t)); + + /* Adjust buffer according to instruction. */ + BUG_ON(orig->ainsn.stack_space < 0); + + stack_protect += orig->ainsn.stack_space; + + /* Should have been filtered by can_optimize(). */ + BUG_ON(stack_protect > 255); + + /* Create a 'sub sp, sp, #<stack_protect>' */ + code[TMPL_SUB_SP] = __opcode_to_mem_arm(0xe24dd000 | stack_protect); + /* Create a 'add r3, sp, #<stack_protect>' */ + code[TMPL_ADD_SP] = __opcode_to_mem_arm(0xe28d3000 | stack_protect); + + /* Set probe information */ + val = (unsigned long)op; + code[TMPL_VAL_IDX] = val; + + /* Set probe function call */ + val = (unsigned long)optimized_callback; + code[TMPL_CALL_IDX] = val; + + /* If possible, copy insn and have it executed during restore */ + orig->ainsn.kprobe_direct_exec = false; + if (can_kprobe_direct_exec(orig->ainsn.register_usage_flags)) { + kprobe_opcode_t final_branch = arm_gen_branch( + (unsigned long)(&code[TMPL_RESTORE_END]), + (unsigned long)(op->kp.addr) + 4); + if (final_branch != 0) { + /* + * Replace original 'ldmia sp, {r0 - r15}' with + * 'ldmia {r0 - r14}', restore all registers except pc. + */ + code[TMPL_RESTORE_BEGIN] = __opcode_to_mem_arm(0xe89d7fff); + + /* The original probed instruction */ + code[TMPL_RESTORE_ORIGN_INSN] = __opcode_to_mem_arm(orig->opcode); + + /* Jump back to next instruction */ + code[TMPL_RESTORE_END] = __opcode_to_mem_arm(final_branch); + orig->ainsn.kprobe_direct_exec = true; + } + } + + flush_icache_range((unsigned long)code, + (unsigned long)(&code[TMPL_END_IDX])); + + /* Set op->optinsn.insn means prepared. */ + op->optinsn.insn = code; + return 0; +} + +void __kprobes arch_optimize_kprobes(struct list_head *oplist) +{ + struct optimized_kprobe *op, *tmp; + + list_for_each_entry_safe(op, tmp, oplist, list) { + unsigned long insn; + WARN_ON(kprobe_disabled(&op->kp)); + + /* + * Backup instructions which will be replaced + * by jump address + */ + memcpy(op->optinsn.copied_insn, op->kp.addr, + RELATIVEJUMP_SIZE); + + insn = arm_gen_branch((unsigned long)op->kp.addr, + (unsigned long)op->optinsn.insn); + BUG_ON(insn == 0); + + /* + * Make it a conditional branch if replaced insn + * is consitional + */ + insn = (__mem_to_opcode_arm( + op->optinsn.copied_insn[0]) & 0xf0000000) | + (insn & 0x0fffffff); + + /* + * Similar to __arch_disarm_kprobe, operations which + * removing breakpoints must be wrapped by stop_machine + * to avoid racing. + */ + kprobes_remove_breakpoint(op->kp.addr, insn); + + list_del_init(&op->list); + } +} + +void arch_unoptimize_kprobe(struct optimized_kprobe *op) +{ + arch_arm_kprobe(&op->kp); +} + +/* + * Recover original instructions and breakpoints from relative jumps. + * Caller must call with locking kprobe_mutex. + */ +void arch_unoptimize_kprobes(struct list_head *oplist, + struct list_head *done_list) +{ + struct optimized_kprobe *op, *tmp; + + list_for_each_entry_safe(op, tmp, oplist, list) { + arch_unoptimize_kprobe(op); + list_move(&op->list, done_list); + } +} + +int arch_within_optimized_kprobe(struct optimized_kprobe *op, + unsigned long addr) +{ + return ((unsigned long)op->kp.addr <= addr && + (unsigned long)op->kp.addr + RELATIVEJUMP_SIZE > addr); +} + +void arch_remove_optimized_kprobe(struct optimized_kprobe *op) +{ + __arch_remove_optimized_kprobe(op, 1); +} diff --git a/arch/arm/kernel/kprobes-test-arm.c b/arch/arm/probes/kprobes/test-arm.c index cb1424240ff6..8866aedfdea2 100644 --- a/arch/arm/kernel/kprobes-test-arm.c +++ b/arch/arm/probes/kprobes/test-arm.c @@ -12,8 +12,9 @@ #include <linux/module.h> #include <asm/system_info.h> #include <asm/opcodes.h> +#include <asm/probes.h> -#include "kprobes-test.h" +#include "test-core.h" #define TEST_ISA "32" @@ -203,9 +204,9 @@ void kprobe_arm_test_cases(void) #endif TEST_GROUP("Miscellaneous instructions") - TEST("mrs r0, cpsr") - TEST("mrspl r7, cpsr") - TEST("mrs r14, cpsr") + TEST_RMASKED("mrs r",0,~PSR_IGNORE_BITS,", cpsr") + TEST_RMASKED("mrspl r",7,~PSR_IGNORE_BITS,", cpsr") + TEST_RMASKED("mrs r",14,~PSR_IGNORE_BITS,", cpsr") TEST_UNSUPPORTED(__inst_arm(0xe10ff000) " @ mrs r15, cpsr") TEST_UNSUPPORTED("mrs r0, spsr") TEST_UNSUPPORTED("mrs lr, spsr") @@ -214,9 +215,12 @@ void kprobe_arm_test_cases(void) TEST_UNSUPPORTED("msr cpsr_f, lr") TEST_UNSUPPORTED("msr spsr, r0") +#if __LINUX_ARM_ARCH__ >= 5 || \ + (__LINUX_ARM_ARCH__ == 4 && !defined(CONFIG_CPU_32v4)) TEST_BF_R("bx r",0,2f,"") TEST_BB_R("bx r",7,2f,"") TEST_BF_R("bxeq r",14,2f,"") +#endif #if __LINUX_ARM_ARCH__ >= 5 TEST_R("clz r0, r",0, 0x0,"") @@ -476,7 +480,9 @@ void kprobe_arm_test_cases(void) TEST_GROUP("Extra load/store instructions") TEST_RPR( "strh r",0, VAL1,", [r",1, 48,", -r",2, 24,"]") - TEST_RPR( "streqh r",14,VAL2,", [r",13,0, ", r",12, 48,"]") + TEST_RPR( "streqh r",14,VAL2,", [r",11,0, ", r",12, 48,"]") + TEST_UNSUPPORTED( "streqh r14, [r13, r12]") + TEST_UNSUPPORTED( "streqh r14, [r12, r13]") TEST_RPR( "strh r",1, VAL1,", [r",2, 24,", r",3, 48,"]!") TEST_RPR( "strneh r",12,VAL2,", [r",11,48,", -r",10,24,"]!") TEST_RPR( "strh r",2, VAL1,", [r",3, 24,"], r",4, 48,"") @@ -501,6 +507,9 @@ void kprobe_arm_test_cases(void) TEST_RP( "strplh r",12,VAL2,", [r",11,24,", #-4]!") TEST_RP( "strh r",2, VAL1,", [r",3, 24,"], #48") TEST_RP( "strh r",10,VAL2,", [r",9, 64,"], #-48") + TEST_RP( "strh r",3, VAL1,", [r",13,TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"]!") + TEST_UNSUPPORTED("strh r3, [r13, #-"__stringify(MAX_STACK_SIZE)"-8]!") + TEST_RP( "strh r",4, VAL1,", [r",14,TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"-8]!") TEST_UNSUPPORTED(__inst_arm(0xe1efc3b0) " @ strh r12, [pc, #48]!") TEST_UNSUPPORTED(__inst_arm(0xe0c9f3b0) " @ strh pc, [r9], #48") @@ -565,7 +574,9 @@ void kprobe_arm_test_cases(void) #if __LINUX_ARM_ARCH__ >= 5 TEST_RPR( "strd r",0, VAL1,", [r",1, 48,", -r",2,24,"]") - TEST_RPR( "strccd r",8, VAL2,", [r",13,0, ", r",12,48,"]") + TEST_RPR( "strccd r",8, VAL2,", [r",11,0, ", r",12,48,"]") + TEST_UNSUPPORTED( "strccd r8, [r13, r12]") + TEST_UNSUPPORTED( "strccd r8, [r12, r13]") TEST_RPR( "strd r",4, VAL1,", [r",2, 24,", r",3, 48,"]!") TEST_RPR( "strcsd r",12,VAL2,", [r",11,48,", -r",10,24,"]!") TEST_RPR( "strd r",2, VAL1,", [r",5, 24,"], r",4,48,"") @@ -589,6 +600,9 @@ void kprobe_arm_test_cases(void) TEST_RP( "strvcd r",12,VAL2,", [r",11,24,", #-16]!") TEST_RP( "strd r",2, VAL1,", [r",4, 24,"], #48") TEST_RP( "strd r",10,VAL2,", [r",9, 64,"], #-48") + TEST_RP( "strd r",6, VAL1,", [r",13,TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"]!") + TEST_UNSUPPORTED("strd r6, [r13, #-"__stringify(MAX_STACK_SIZE)"-8]!") + TEST_RP( "strd r",4, VAL1,", [r",12,TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"-8]!") TEST_UNSUPPORTED(__inst_arm(0xe1efc3f0) " @ strd r12, [pc, #48]!") TEST_P( "ldrd r0, [r",0, 24,", #-8]") @@ -637,14 +651,20 @@ void kprobe_arm_test_cases(void) TEST_RP( "str"byte" r",12,VAL2,", [r",11,24,", #-4]!") \ TEST_RP( "str"byte" r",2, VAL1,", [r",3, 24,"], #48") \ TEST_RP( "str"byte" r",10,VAL2,", [r",9, 64,"], #-48") \ + TEST_RP( "str"byte" r",3, VAL1,", [r",13,TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"]!") \ + TEST_UNSUPPORTED("str"byte" r3, [r13, #-"__stringify(MAX_STACK_SIZE)"-8]!") \ + TEST_RP( "str"byte" r",4, VAL1,", [r",10,TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"-8]!") \ TEST_RPR("str"byte" r",0, VAL1,", [r",1, 48,", -r",2, 24,"]") \ - TEST_RPR("str"byte" r",14,VAL2,", [r",13,0, ", r",12, 48,"]") \ + TEST_RPR("str"byte" r",14,VAL2,", [r",11,0, ", r",12, 48,"]") \ + TEST_UNSUPPORTED("str"byte" r14, [r13, r12]") \ + TEST_UNSUPPORTED("str"byte" r14, [r12, r13]") \ TEST_RPR("str"byte" r",1, VAL1,", [r",2, 24,", r",3, 48,"]!") \ TEST_RPR("str"byte" r",12,VAL2,", [r",11,48,", -r",10,24,"]!") \ TEST_RPR("str"byte" r",2, VAL1,", [r",3, 24,"], r",4, 48,"") \ TEST_RPR("str"byte" r",10,VAL2,", [r",9, 48,"], -r",11,24,"") \ TEST_RPR("str"byte" r",0, VAL1,", [r",1, 24,", r",2, 32,", asl #1]")\ - TEST_RPR("str"byte" r",14,VAL2,", [r",13,0, ", r",12, 32,", lsr #2]")\ + TEST_RPR("str"byte" r",14,VAL2,", [r",11,0, ", r",12, 32,", lsr #2]")\ + TEST_UNSUPPORTED("str"byte" r14, [r13, r12, lsr #2]") \ TEST_RPR("str"byte" r",1, VAL1,", [r",2, 24,", r",3, 32,", asr #3]!")\ TEST_RPR("str"byte" r",12,VAL2,", [r",11,24,", r",10, 4,", ror #31]!")\ TEST_P( "ldr"byte" r0, [r",0, 24,", #-2]") \ @@ -668,12 +688,12 @@ void kprobe_arm_test_cases(void) LOAD_STORE("") TEST_P( "str pc, [r",0,0,", #15*4]") - TEST_R( "str pc, [sp, r",2,15*4,"]") + TEST_UNSUPPORTED( "str pc, [sp, r2]") TEST_BF( "ldr pc, [sp, #15*4]") TEST_BF_R("ldr pc, [sp, r",2,15*4,"]") TEST_P( "str sp, [r",0,0,", #13*4]") - TEST_R( "str sp, [sp, r",2,13*4,"]") + TEST_UNSUPPORTED( "str sp, [sp, r2]") TEST_BF( "ldr sp, [sp, #13*4]") TEST_BF_R("ldr sp, [sp, r",2,13*4,"]") diff --git a/arch/arm/kernel/kprobes-test.c b/arch/arm/probes/kprobes/test-core.c index b206d7790c77..9775de22e2ff 100644 --- a/arch/arm/kernel/kprobes-test.c +++ b/arch/arm/probes/kprobes/test-core.c @@ -209,10 +209,10 @@ #include <linux/bug.h> #include <asm/opcodes.h> -#include "kprobes.h" -#include "probes-arm.h" -#include "probes-thumb.h" -#include "kprobes-test.h" +#include "core.h" +#include "test-core.h" +#include "../decode-arm.h" +#include "../decode-thumb.h" #define BENCHMARKING 1 @@ -236,6 +236,8 @@ static int tests_failed; #ifndef CONFIG_THUMB2_KERNEL +#define RET(reg) "mov pc, "#reg + long arm_func(long r0, long r1); static void __used __naked __arm_kprobes_test_func(void) @@ -245,7 +247,7 @@ static void __used __naked __arm_kprobes_test_func(void) ".type arm_func, %%function \n\t" "arm_func: \n\t" "adds r0, r0, r1 \n\t" - "bx lr \n\t" + "mov pc, lr \n\t" ".code "NORMAL_ISA /* Back to Thumb if necessary */ : : : "r0", "r1", "cc" ); @@ -253,6 +255,8 @@ static void __used __naked __arm_kprobes_test_func(void) #else /* CONFIG_THUMB2_KERNEL */ +#define RET(reg) "bx "#reg + long thumb16_func(long r0, long r1); long thumb32even_func(long r0, long r1); long thumb32odd_func(long r0, long r1); @@ -494,7 +498,7 @@ static void __naked benchmark_nop(void) { __asm__ __volatile__ ( "nop \n\t" - "bx lr" + RET(lr)" \n\t" ); } @@ -977,7 +981,7 @@ void __naked __kprobes_test_case_start(void) "bic r0, lr, #1 @ r0 = inline data \n\t" "mov r1, sp \n\t" "bl kprobes_test_case_start \n\t" - "bx r0 \n\t" + RET(r0)" \n\t" ); } @@ -1056,15 +1060,6 @@ static int test_case_run_count; static bool test_case_is_thumb; static int test_instance; -/* - * We ignore the state of the imprecise abort disable flag (CPSR.A) because this - * can change randomly as the kernel doesn't take care to preserve or initialise - * this across context switches. Also, with Security Extentions, the flag may - * not be under control of the kernel; for this reason we ignore the state of - * the FIQ disable flag CPSR.F as well. - */ -#define PSR_IGNORE_BITS (PSR_A_BIT | PSR_F_BIT) - static unsigned long test_check_cc(int cc, unsigned long cpsr) { int ret = arm_check_condition(cc << 28, cpsr); @@ -1196,6 +1191,13 @@ static void setup_test_context(struct pt_regs *regs) regs->uregs[arg->reg] = (unsigned long)current_stack + arg->val; memory_needs_checking = true; + /* + * Test memory at an address below SP is in danger of + * being altered by an interrupt occurring and pushing + * data onto the stack. Disable interrupts to stop this. + */ + if (arg->reg == 13) + regs->ARM_cpsr |= PSR_I_BIT; break; } case ARG_TYPE_MEM: { @@ -1264,14 +1266,26 @@ test_case_pre_handler(struct kprobe *p, struct pt_regs *regs) static int __kprobes test_after_pre_handler(struct kprobe *p, struct pt_regs *regs) { + struct test_arg *args; + if (container_of(p, struct test_probe, kprobe)->hit == test_instance) return 0; /* Already run for this test instance */ result_regs = *regs; + + /* Mask out results which are indeterminate */ result_regs.ARM_cpsr &= ~PSR_IGNORE_BITS; + for (args = current_args; args[0].type != ARG_TYPE_END; ++args) + if (args[0].type == ARG_TYPE_REG_MASKED) { + struct test_arg_regptr *arg = + (struct test_arg_regptr *)args; + result_regs.uregs[arg->reg] &= arg->val; + } /* Undo any changes done to SP by the test case */ regs->ARM_sp = (unsigned long)current_stack; + /* Enable interrupts in case setup_test_context disabled them */ + regs->ARM_cpsr &= ~PSR_I_BIT; container_of(p, struct test_probe, kprobe)->hit = test_instance; return 0; diff --git a/arch/arm/kernel/kprobes-test.h b/arch/arm/probes/kprobes/test-core.h index 4430990e90e7..94285203e9f7 100644 --- a/arch/arm/kernel/kprobes-test.h +++ b/arch/arm/probes/kprobes/test-core.h @@ -1,5 +1,5 @@ /* - * arch/arm/kernel/kprobes-test.h + * arch/arm/probes/kprobes/test-core.h * * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>. * @@ -45,10 +45,11 @@ extern int kprobe_test_cc_position; * */ -#define ARG_TYPE_END 0 -#define ARG_TYPE_REG 1 -#define ARG_TYPE_PTR 2 -#define ARG_TYPE_MEM 3 +#define ARG_TYPE_END 0 +#define ARG_TYPE_REG 1 +#define ARG_TYPE_PTR 2 +#define ARG_TYPE_MEM 3 +#define ARG_TYPE_REG_MASKED 4 #define ARG_FLAG_UNSUPPORTED 0x01 #define ARG_FLAG_SUPPORTED 0x02 @@ -61,7 +62,7 @@ struct test_arg { }; struct test_arg_regptr { - u8 type; /* ARG_TYPE_REG or ARG_TYPE_PTR */ + u8 type; /* ARG_TYPE_REG or ARG_TYPE_PTR or ARG_TYPE_REG_MASKED */ u8 reg; u8 _padding[2]; u32 val; @@ -138,6 +139,12 @@ struct test_arg_end { ".short 0 \n\t" \ ".word "#val" \n\t" +#define TEST_ARG_REG_MASKED(reg, val) \ + ".byte "__stringify(ARG_TYPE_REG_MASKED)" \n\t" \ + ".byte "#reg" \n\t" \ + ".short 0 \n\t" \ + ".word "#val" \n\t" + #define TEST_ARG_END(flags) \ ".byte "__stringify(ARG_TYPE_END)" \n\t" \ ".byte "TEST_ISA flags" \n\t" \ @@ -395,6 +402,22 @@ struct test_arg_end { " "codex" \n\t" \ TESTCASE_END +#define TEST_RMASKED(code1, reg, mask, code2) \ + TESTCASE_START(code1 #reg code2) \ + TEST_ARG_REG_MASKED(reg, mask) \ + TEST_ARG_END("") \ + TEST_INSTRUCTION(code1 #reg code2) \ + TESTCASE_END + +/* + * We ignore the state of the imprecise abort disable flag (CPSR.A) because this + * can change randomly as the kernel doesn't take care to preserve or initialise + * this across context switches. Also, with Security Extensions, the flag may + * not be under control of the kernel; for this reason we ignore the state of + * the FIQ disable flag CPSR.F as well. + */ +#define PSR_IGNORE_BITS (PSR_A_BIT | PSR_F_BIT) + /* * Macros for defining space directives spread over multiple lines. diff --git a/arch/arm/kernel/kprobes-test-thumb.c b/arch/arm/probes/kprobes/test-thumb.c index 844dd10d8593..b683b4517458 100644 --- a/arch/arm/kernel/kprobes-test-thumb.c +++ b/arch/arm/probes/kprobes/test-thumb.c @@ -1,5 +1,5 @@ /* - * arch/arm/kernel/kprobes-test-thumb.c + * arch/arm/probes/kprobes/test-thumb.c * * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>. * @@ -11,8 +11,9 @@ #include <linux/kernel.h> #include <linux/module.h> #include <asm/opcodes.h> +#include <asm/probes.h> -#include "kprobes-test.h" +#include "test-core.h" #define TEST_ISA "16" @@ -416,6 +417,9 @@ void kprobe_thumb32_test_cases(void) TEST_RR( "strd r",14,VAL2,", r",12,VAL1,", [sp, #16]!") TEST_RRP("strd r",1, VAL1,", r",0, VAL2,", [r",7, 24,"], #16") TEST_RR( "strd r",7, VAL2,", r",8, VAL1,", [sp], #-16") + TEST_RRP("strd r",6, VAL1,", r",7, VAL2,", [r",13, TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"]!") + TEST_UNSUPPORTED("strd r6, r7, [r13, #-"__stringify(MAX_STACK_SIZE)"-8]!") + TEST_RRP("strd r",4, VAL1,", r",5, VAL2,", [r",14, TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"-8]!") TEST_UNSUPPORTED(__inst_thumb32(0xe9efec04) " @ strd r14, r12, [pc, #16]!") TEST_UNSUPPORTED(__inst_thumb32(0xe8efec04) " @ strd r14, r12, [pc], #16") @@ -774,8 +778,8 @@ CONDITION_INSTRUCTIONS(22, TEST_UNSUPPORTED("subs pc, lr, #4") - TEST("mrs r0, cpsr") - TEST("mrs r14, cpsr") + TEST_RMASKED("mrs r",0,~PSR_IGNORE_BITS,", cpsr") + TEST_RMASKED("mrs r",14,~PSR_IGNORE_BITS,", cpsr") TEST_UNSUPPORTED(__inst_thumb32(0xf3ef8d00) " @ mrs sp, spsr") TEST_UNSUPPORTED(__inst_thumb32(0xf3ef8f00) " @ mrs pc, spsr") TEST_UNSUPPORTED("mrs r0, spsr") @@ -821,14 +825,22 @@ CONDITION_INSTRUCTIONS(22, TEST_RP( "str"size" r",14,VAL2,", [r",1, 256, ", #-128]!") \ TEST_RPR("str"size".w r",0, VAL1,", [r",1, 0,", r",2, 4,"]") \ TEST_RPR("str"size" r",14,VAL2,", [r",10,0,", r",11,4,", lsl #1]") \ + TEST_UNSUPPORTED("str"size" r0, [r13, r1]") \ TEST_R( "str"size".w r",7, VAL1,", [sp, #24]") \ TEST_RP( "str"size".w r",0, VAL2,", [r",0,0, "]") \ + TEST_RP( "str"size" r",6, VAL1,", [r",13, TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"]!") \ + TEST_UNSUPPORTED("str"size" r6, [r13, #-"__stringify(MAX_STACK_SIZE)"-8]!") \ + TEST_RP( "str"size" r",4, VAL2,", [r",12, TEST_MEMORY_SIZE,", #-"__stringify(MAX_STACK_SIZE)"-8]!") \ TEST_UNSUPPORTED("str"size"t r0, [r1, #4]") SINGLE_STORE("b") SINGLE_STORE("h") SINGLE_STORE("") + TEST_UNSUPPORTED(__inst_thumb32(0xf801000d) " @ strb r0, [r1, r13]") + TEST_UNSUPPORTED(__inst_thumb32(0xf821000d) " @ strh r0, [r1, r13]") + TEST_UNSUPPORTED(__inst_thumb32(0xf841000d) " @ str r0, [r1, r13]") + TEST("str sp, [sp]") TEST_UNSUPPORTED(__inst_thumb32(0xf8cfe000) " @ str r14, [pc]") TEST_UNSUPPORTED(__inst_thumb32(0xf8cef000) " @ str pc, [r14]") diff --git a/arch/arm/probes/uprobes/Makefile b/arch/arm/probes/uprobes/Makefile new file mode 100644 index 000000000000..e1dc3d0f6d5a --- /dev/null +++ b/arch/arm/probes/uprobes/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_UPROBES) += core.o actions-arm.o diff --git a/arch/arm/kernel/uprobes-arm.c b/arch/arm/probes/uprobes/actions-arm.c index d3b655ff17da..76eb44972ebe 100644 --- a/arch/arm/kernel/uprobes-arm.c +++ b/arch/arm/probes/uprobes/actions-arm.c @@ -13,9 +13,9 @@ #include <linux/uprobes.h> #include <linux/module.h> -#include "probes.h" -#include "probes-arm.h" -#include "uprobes.h" +#include "../decode.h" +#include "../decode-arm.h" +#include "core.h" static int uprobes_substitute_pc(unsigned long *pinsn, u32 oregs) { @@ -195,8 +195,6 @@ uprobe_decode_ldmstm(probes_opcode_t insn, } const union decode_action uprobes_probes_actions[] = { - [PROBES_EMULATE_NONE] = {.handler = probes_simulate_nop}, - [PROBES_SIMULATE_NOP] = {.handler = probes_simulate_nop}, [PROBES_PRELOAD_IMM] = {.handler = probes_simulate_nop}, [PROBES_PRELOAD_REG] = {.handler = probes_simulate_nop}, [PROBES_BRANCH_IMM] = {.handler = simulate_blx1}, diff --git a/arch/arm/kernel/uprobes.c b/arch/arm/probes/uprobes/core.c index 56adf9c1fde0..d1329f1ba4e4 100644 --- a/arch/arm/kernel/uprobes.c +++ b/arch/arm/probes/uprobes/core.c @@ -17,9 +17,9 @@ #include <asm/opcodes.h> #include <asm/traps.h> -#include "probes.h" -#include "probes-arm.h" -#include "uprobes.h" +#include "../decode.h" +#include "../decode-arm.h" +#include "core.h" #define UPROBE_TRAP_NR UINT_MAX @@ -88,7 +88,7 @@ int arch_uprobe_analyze_insn(struct arch_uprobe *auprobe, struct mm_struct *mm, auprobe->ixol[1] = __opcode_to_mem_arm(UPROBE_SS_ARM_INSN); ret = arm_probes_decode_insn(insn, &auprobe->asi, false, - uprobes_probes_actions); + uprobes_probes_actions, NULL); switch (ret) { case INSN_REJECTED: return -EINVAL; diff --git a/arch/arm/kernel/uprobes.h b/arch/arm/probes/uprobes/core.h index 1d0c12dfbd03..1d0c12dfbd03 100644 --- a/arch/arm/kernel/uprobes.h +++ b/arch/arm/probes/uprobes/core.h diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index d3f7e4941231..2814304cec04 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -39,6 +39,7 @@ config ARM64 select HARDIRQS_SW_RESEND select HAVE_ALIGNED_STRUCT_PAGE if SLUB select HAVE_ARCH_AUDITSYSCALL + select HAVE_ARCH_BITREVERSE select HAVE_ARCH_JUMP_LABEL select HAVE_ARCH_KGDB select HAVE_ARCH_SECCOMP_FILTER diff --git a/arch/arm64/include/asm/bitrev.h b/arch/arm64/include/asm/bitrev.h new file mode 100644 index 000000000000..a5a0c3660137 --- /dev/null +++ b/arch/arm64/include/asm/bitrev.h @@ -0,0 +1,19 @@ +#ifndef __ASM_BITREV_H +#define __ASM_BITREV_H +static __always_inline __attribute_const__ u32 __arch_bitrev32(u32 x) +{ + __asm__ ("rbit %w0, %w1" : "=r" (x) : "r" (x)); + return x; +} + +static __always_inline __attribute_const__ u16 __arch_bitrev16(u16 x) +{ + return __arch_bitrev32((u32)x) >> 16; +} + +static __always_inline __attribute_const__ u8 __arch_bitrev8(u8 x) +{ + return __arch_bitrev32((u32)x) >> 24; +} + +#endif diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c index 7c523bbf3dc8..0dd8d089c315 100644 --- a/arch/x86/kernel/kprobes/opt.c +++ b/arch/x86/kernel/kprobes/opt.c @@ -322,7 +322,8 @@ void arch_remove_optimized_kprobe(struct optimized_kprobe *op) * Target instructions MUST be relocatable (checked inside) * This is called when new aggr(opt)probe is allocated or reused. */ -int arch_prepare_optimized_kprobe(struct optimized_kprobe *op) +int arch_prepare_optimized_kprobe(struct optimized_kprobe *op, + struct kprobe *__unused) { u8 *buf; int ret; diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c index 52ddd9fbb55e..f0099360039e 100644 --- a/drivers/amba/bus.c +++ b/drivers/amba/bus.c @@ -18,6 +18,7 @@ #include <linux/pm_domain.h> #include <linux/amba/bus.h> #include <linux/sizes.h> +#include <linux/limits.h> #include <asm/irq.h> @@ -43,6 +44,10 @@ static int amba_match(struct device *dev, struct device_driver *drv) struct amba_device *pcdev = to_amba_device(dev); struct amba_driver *pcdrv = to_amba_driver(drv); + /* When driver_override is set, only bind to the matching driver */ + if (pcdev->driver_override) + return !strcmp(pcdev->driver_override, drv->name); + return amba_lookup(pcdrv->id_table, pcdev) != NULL; } @@ -59,6 +64,47 @@ static int amba_uevent(struct device *dev, struct kobj_uevent_env *env) return retval; } +static ssize_t driver_override_show(struct device *_dev, + struct device_attribute *attr, char *buf) +{ + struct amba_device *dev = to_amba_device(_dev); + + if (!dev->driver_override) + return 0; + + return sprintf(buf, "%s\n", dev->driver_override); +} + +static ssize_t driver_override_store(struct device *_dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct amba_device *dev = to_amba_device(_dev); + char *driver_override, *old = dev->driver_override, *cp; + + if (count > PATH_MAX) + return -EINVAL; + + driver_override = kstrndup(buf, count, GFP_KERNEL); + if (!driver_override) + return -ENOMEM; + + cp = strchr(driver_override, '\n'); + if (cp) + *cp = '\0'; + + if (strlen(driver_override)) { + dev->driver_override = driver_override; + } else { + kfree(driver_override); + dev->driver_override = NULL; + } + + kfree(old); + + return count; +} + #define amba_attr_func(name,fmt,arg...) \ static ssize_t name##_show(struct device *_dev, \ struct device_attribute *attr, char *buf) \ @@ -81,6 +127,7 @@ amba_attr_func(resource, "\t%016llx\t%016llx\t%016lx\n", static struct device_attribute amba_dev_attrs[] = { __ATTR_RO(id), __ATTR_RO(resource), + __ATTR_RW(driver_override), __ATTR_NULL, }; diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index fc01ec27d3c8..8a1479fc6479 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -229,4 +229,11 @@ config CLKSRC_MIPS_GIC depends on MIPS_GIC select CLKSRC_OF +config CLKSRC_PXA + def_bool y if ARCH_PXA || ARCH_SA1100 + select CLKSRC_OF if USE_OF + help + This enables OST0 support available on PXA and SA-11x0 + platforms. + endmenu diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index 94d90b24b56b..aa526f4bd3cf 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -21,7 +21,7 @@ obj-$(CONFIG_ARCH_CLPS711X) += clps711x-timer.o obj-$(CONFIG_ARCH_MARCO) += timer-marco.o obj-$(CONFIG_ARCH_MOXART) += moxart_timer.o obj-$(CONFIG_ARCH_MXS) += mxs_timer.o -obj-$(CONFIG_ARCH_PXA) += pxa_timer.o +obj-$(CONFIG_CLKSRC_PXA) += pxa_timer.o obj-$(CONFIG_ARCH_PRIMA2) += timer-prima2.o obj-$(CONFIG_ARCH_U300) += timer-u300.o obj-$(CONFIG_SUN4I_TIMER) += sun4i_timer.o diff --git a/drivers/gpio/gpio-sa1100.c b/drivers/gpio/gpio-sa1100.c index a90be34e4d5c..bec397a60204 100644 --- a/drivers/gpio/gpio-sa1100.c +++ b/drivers/gpio/gpio-sa1100.c @@ -11,6 +11,7 @@ #include <linux/init.h> #include <linux/module.h> #include <linux/io.h> +#include <linux/syscore_ops.h> #include <mach/hardware.h> #include <mach/irqs.h> @@ -50,7 +51,7 @@ static int sa1100_direction_output(struct gpio_chip *chip, unsigned offset, int static int sa1100_to_irq(struct gpio_chip *chip, unsigned offset) { - return offset < 11 ? (IRQ_GPIO0 + offset) : (IRQ_GPIO11 - 11 + offset); + return IRQ_GPIO0 + offset; } static struct gpio_chip sa1100_gpio_chip = { @@ -64,7 +65,203 @@ static struct gpio_chip sa1100_gpio_chip = { .ngpio = GPIO_MAX + 1, }; +/* + * SA1100 GPIO edge detection for IRQs: + * IRQs are generated on Falling-Edge, Rising-Edge, or both. + * Use this instead of directly setting GRER/GFER. + */ +static int GPIO_IRQ_rising_edge; +static int GPIO_IRQ_falling_edge; +static int GPIO_IRQ_mask; + +static int sa1100_gpio_type(struct irq_data *d, unsigned int type) +{ + unsigned int mask; + + mask = BIT(d->hwirq); + + if (type == IRQ_TYPE_PROBE) { + if ((GPIO_IRQ_rising_edge | GPIO_IRQ_falling_edge) & mask) + return 0; + type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING; + } + + if (type & IRQ_TYPE_EDGE_RISING) + GPIO_IRQ_rising_edge |= mask; + else + GPIO_IRQ_rising_edge &= ~mask; + if (type & IRQ_TYPE_EDGE_FALLING) + GPIO_IRQ_falling_edge |= mask; + else + GPIO_IRQ_falling_edge &= ~mask; + + GRER = GPIO_IRQ_rising_edge & GPIO_IRQ_mask; + GFER = GPIO_IRQ_falling_edge & GPIO_IRQ_mask; + + return 0; +} + +/* + * GPIO IRQs must be acknowledged. + */ +static void sa1100_gpio_ack(struct irq_data *d) +{ + GEDR = BIT(d->hwirq); +} + +static void sa1100_gpio_mask(struct irq_data *d) +{ + unsigned int mask = BIT(d->hwirq); + + GPIO_IRQ_mask &= ~mask; + + GRER &= ~mask; + GFER &= ~mask; +} + +static void sa1100_gpio_unmask(struct irq_data *d) +{ + unsigned int mask = BIT(d->hwirq); + + GPIO_IRQ_mask |= mask; + + GRER = GPIO_IRQ_rising_edge & GPIO_IRQ_mask; + GFER = GPIO_IRQ_falling_edge & GPIO_IRQ_mask; +} + +static int sa1100_gpio_wake(struct irq_data *d, unsigned int on) +{ + if (on) + PWER |= BIT(d->hwirq); + else + PWER &= ~BIT(d->hwirq); + return 0; +} + +/* + * This is for GPIO IRQs + */ +static struct irq_chip sa1100_gpio_irq_chip = { + .name = "GPIO", + .irq_ack = sa1100_gpio_ack, + .irq_mask = sa1100_gpio_mask, + .irq_unmask = sa1100_gpio_unmask, + .irq_set_type = sa1100_gpio_type, + .irq_set_wake = sa1100_gpio_wake, +}; + +static int sa1100_gpio_irqdomain_map(struct irq_domain *d, + unsigned int irq, irq_hw_number_t hwirq) +{ + irq_set_chip_and_handler(irq, &sa1100_gpio_irq_chip, + handle_edge_irq); + set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); + + return 0; +} + +static struct irq_domain_ops sa1100_gpio_irqdomain_ops = { + .map = sa1100_gpio_irqdomain_map, + .xlate = irq_domain_xlate_onetwocell, +}; + +static struct irq_domain *sa1100_gpio_irqdomain; + +/* + * IRQ 0-11 (GPIO) handler. We enter here with the + * irq_controller_lock held, and IRQs disabled. Decode the IRQ + * and call the handler. + */ +static void +sa1100_gpio_handler(unsigned int irq, struct irq_desc *desc) +{ + unsigned int mask; + + mask = GEDR; + do { + /* + * clear down all currently active IRQ sources. + * We will be processing them all. + */ + GEDR = mask; + + irq = IRQ_GPIO0; + do { + if (mask & 1) + generic_handle_irq(irq); + mask >>= 1; + irq++; + } while (mask); + + mask = GEDR; + } while (mask); +} + +static int sa1100_gpio_suspend(void) +{ + /* + * Set the appropriate edges for wakeup. + */ + GRER = PWER & GPIO_IRQ_rising_edge; + GFER = PWER & GPIO_IRQ_falling_edge; + + /* + * Clear any pending GPIO interrupts. + */ + GEDR = GEDR; + + return 0; +} + +static void sa1100_gpio_resume(void) +{ + GRER = GPIO_IRQ_rising_edge & GPIO_IRQ_mask; + GFER = GPIO_IRQ_falling_edge & GPIO_IRQ_mask; +} + +static struct syscore_ops sa1100_gpio_syscore_ops = { + .suspend = sa1100_gpio_suspend, + .resume = sa1100_gpio_resume, +}; + +static int __init sa1100_gpio_init_devicefs(void) +{ + register_syscore_ops(&sa1100_gpio_syscore_ops); + return 0; +} + +device_initcall(sa1100_gpio_init_devicefs); + void __init sa1100_init_gpio(void) { + /* clear all GPIO edge detects */ + GFER = 0; + GRER = 0; + GEDR = -1; + gpiochip_add(&sa1100_gpio_chip); + + sa1100_gpio_irqdomain = irq_domain_add_simple(NULL, + 28, IRQ_GPIO0, + &sa1100_gpio_irqdomain_ops, NULL); + + /* + * Install handlers for GPIO 0-10 edge detect interrupts + */ + irq_set_chained_handler(IRQ_GPIO0_SC, sa1100_gpio_handler); + irq_set_chained_handler(IRQ_GPIO1_SC, sa1100_gpio_handler); + irq_set_chained_handler(IRQ_GPIO2_SC, sa1100_gpio_handler); + irq_set_chained_handler(IRQ_GPIO3_SC, sa1100_gpio_handler); + irq_set_chained_handler(IRQ_GPIO4_SC, sa1100_gpio_handler); + irq_set_chained_handler(IRQ_GPIO5_SC, sa1100_gpio_handler); + irq_set_chained_handler(IRQ_GPIO6_SC, sa1100_gpio_handler); + irq_set_chained_handler(IRQ_GPIO7_SC, sa1100_gpio_handler); + irq_set_chained_handler(IRQ_GPIO8_SC, sa1100_gpio_handler); + irq_set_chained_handler(IRQ_GPIO9_SC, sa1100_gpio_handler); + irq_set_chained_handler(IRQ_GPIO10_SC, sa1100_gpio_handler); + /* + * Install handler for GPIO 11-27 edge detect interrupts + */ + irq_set_chained_handler(IRQ_GPIO11_27, sa1100_gpio_handler); + } diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h index 2afc618b15ce..50fc66868402 100644 --- a/include/linux/amba/bus.h +++ b/include/linux/amba/bus.h @@ -33,6 +33,7 @@ struct amba_device { struct clk *pclk; unsigned int periphid; unsigned int irq[AMBA_NR_IRQS]; + char *driver_override; }; struct amba_driver { @@ -92,11 +93,15 @@ struct amba_device *amba_find_device(const char *, struct device *, unsigned int int amba_request_regions(struct amba_device *, const char *); void amba_release_regions(struct amba_device *); -#define amba_pclk_enable(d) \ - (IS_ERR((d)->pclk) ? 0 : clk_enable((d)->pclk)) +static inline int amba_pclk_enable(struct amba_device *dev) +{ + return clk_enable(dev->pclk); +} -#define amba_pclk_disable(d) \ - do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0) +static inline void amba_pclk_disable(struct amba_device *dev) +{ + clk_disable(dev->pclk); +} static inline int amba_pclk_prepare(struct amba_device *dev) { diff --git a/include/linux/bitrev.h b/include/linux/bitrev.h index 7ffe03f4693d..fb790b8449c1 100644 --- a/include/linux/bitrev.h +++ b/include/linux/bitrev.h @@ -3,14 +3,83 @@ #include <linux/types.h> -extern u8 const byte_rev_table[256]; +#ifdef CONFIG_HAVE_ARCH_BITREVERSE +#include <asm/bitrev.h> + +#define __bitrev32 __arch_bitrev32 +#define __bitrev16 __arch_bitrev16 +#define __bitrev8 __arch_bitrev8 -static inline u8 bitrev8(u8 byte) +#else +extern u8 const byte_rev_table[256]; +static inline u8 __bitrev8(u8 byte) { return byte_rev_table[byte]; } -extern u16 bitrev16(u16 in); -extern u32 bitrev32(u32 in); +static inline u16 __bitrev16(u16 x) +{ + return (__bitrev8(x & 0xff) << 8) | __bitrev8(x >> 8); +} + +static inline u32 __bitrev32(u32 x) +{ + return (__bitrev16(x & 0xffff) << 16) | __bitrev16(x >> 16); +} + +#endif /* CONFIG_HAVE_ARCH_BITREVERSE */ + +#define __constant_bitrev32(x) \ +({ \ + u32 __x = x; \ + __x = (__x >> 16) | (__x << 16); \ + __x = ((__x & (u32)0xFF00FF00UL) >> 8) | ((__x & (u32)0x00FF00FFUL) << 8); \ + __x = ((__x & (u32)0xF0F0F0F0UL) >> 4) | ((__x & (u32)0x0F0F0F0FUL) << 4); \ + __x = ((__x & (u32)0xCCCCCCCCUL) >> 2) | ((__x & (u32)0x33333333UL) << 2); \ + __x = ((__x & (u32)0xAAAAAAAAUL) >> 1) | ((__x & (u32)0x55555555UL) << 1); \ + __x; \ +}) + +#define __constant_bitrev16(x) \ +({ \ + u16 __x = x; \ + __x = (__x >> 8) | (__x << 8); \ + __x = ((__x & (u16)0xF0F0U) >> 4) | ((__x & (u16)0x0F0FU) << 4); \ + __x = ((__x & (u16)0xCCCCU) >> 2) | ((__x & (u16)0x3333U) << 2); \ + __x = ((__x & (u16)0xAAAAU) >> 1) | ((__x & (u16)0x5555U) << 1); \ + __x; \ +}) + +#define __constant_bitrev8(x) \ +({ \ + u8 __x = x; \ + __x = (__x >> 4) | (__x << 4); \ + __x = ((__x & (u8)0xCCU) >> 2) | ((__x & (u8)0x33U) << 2); \ + __x = ((__x & (u8)0xAAU) >> 1) | ((__x & (u8)0x55U) << 1); \ + __x; \ +}) + +#define bitrev32(x) \ +({ \ + u32 __x = x; \ + __builtin_constant_p(__x) ? \ + __constant_bitrev32(__x) : \ + __bitrev32(__x); \ +}) + +#define bitrev16(x) \ +({ \ + u16 __x = x; \ + __builtin_constant_p(__x) ? \ + __constant_bitrev16(__x) : \ + __bitrev16(__x); \ + }) +#define bitrev8(x) \ +({ \ + u8 __x = x; \ + __builtin_constant_p(__x) ? \ + __constant_bitrev8(__x) : \ + __bitrev8(__x) ; \ + }) #endif /* _LINUX_BITREV_H */ diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h index 5297f9fa0ef2..1ab54754a86d 100644 --- a/include/linux/kprobes.h +++ b/include/linux/kprobes.h @@ -308,7 +308,8 @@ struct optimized_kprobe { /* Architecture dependent functions for direct jump optimization */ extern int arch_prepared_optinsn(struct arch_optimized_insn *optinsn); extern int arch_check_optimized_kprobe(struct optimized_kprobe *op); -extern int arch_prepare_optimized_kprobe(struct optimized_kprobe *op); +extern int arch_prepare_optimized_kprobe(struct optimized_kprobe *op, + struct kprobe *orig); extern void arch_remove_optimized_kprobe(struct optimized_kprobe *op); extern void arch_optimize_kprobes(struct list_head *oplist); extern void arch_unoptimize_kprobes(struct list_head *oplist, diff --git a/kernel/kprobes.c b/kernel/kprobes.c index ee619929cf90..2ca272f8f62e 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -717,7 +717,7 @@ static void prepare_optimized_kprobe(struct kprobe *p) struct optimized_kprobe *op; op = container_of(p, struct optimized_kprobe, kp); - arch_prepare_optimized_kprobe(op); + arch_prepare_optimized_kprobe(op, p); } /* Allocate new optimized_kprobe and try to prepare optimized instructions */ @@ -731,7 +731,7 @@ static struct kprobe *alloc_aggr_kprobe(struct kprobe *p) INIT_LIST_HEAD(&op->list); op->kp.addr = p->addr; - arch_prepare_optimized_kprobe(op); + arch_prepare_optimized_kprobe(op, p); return &op->kp; } diff --git a/lib/Kconfig b/lib/Kconfig index 54cf309a92a5..cd177caf3876 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -13,6 +13,15 @@ config RAID6_PQ config BITREVERSE tristate +config HAVE_ARCH_BITREVERSE + boolean + default n + depends on BITREVERSE + help + This option provides an config for the architecture which have instruction + can do bitreverse operation, we use the hardware instruction if the architecture + have this capability. + config RATIONAL boolean diff --git a/lib/bitrev.c b/lib/bitrev.c index 3956203456d4..40ffda94cc5d 100644 --- a/lib/bitrev.c +++ b/lib/bitrev.c @@ -1,3 +1,4 @@ +#ifndef CONFIG_HAVE_ARCH_BITREVERSE #include <linux/types.h> #include <linux/module.h> #include <linux/bitrev.h> @@ -42,18 +43,4 @@ const u8 byte_rev_table[256] = { }; EXPORT_SYMBOL_GPL(byte_rev_table); -u16 bitrev16(u16 x) -{ - return (bitrev8(x & 0xff) << 8) | bitrev8(x >> 8); -} -EXPORT_SYMBOL(bitrev16); - -/** - * bitrev32 - reverse the order of bits in a u32 value - * @x: value to be bit-reversed - */ -u32 bitrev32(u32 x) -{ - return (bitrev16(x & 0xffff) << 16) | bitrev16(x >> 16); -} -EXPORT_SYMBOL(bitrev32); +#endif /* CONFIG_HAVE_ARCH_BITREVERSE */ |