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* Merge branch 'for-3.10' of ↵Linus Torvalds2013-06-014-7/+5
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc fixes from Helge Deller: "This patcheset includes fixes for: - the PCI/LBA which brings back the stifb graphics framebuffer console - possible memory overflows in parisc kernel init code - parport support on older GSC machines - avoids that users by mistake enable PARPORT_PC_SUPERIO on parisc - MAINTAINERS file list updates for parisc." * 'for-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: parport0: fix this legacy no-device port driver! parport_pc: disable PARPORT_PC_SUPERIO on parisc architecture parisc/PCI: lba: fix: convert to pci_create_root_bus() for correct root bus resources (v2) parisc/PCI: Set type for LBA bus_num resource MAINTAINERS: update parisc architecture file list parisc: kernel: using strlcpy() instead of strcpy() parisc: rename "CONFIG_PA7100" to "CONFIG_PA7000" parisc: fix kernel BUG at arch/parisc/include/asm/mmzone.h:50 parisc: memory overflow, 'name' length is too short for using
| * parisc: kernel: using strlcpy() instead of strcpy()Chen Gang2013-06-011-1/+2
| | | | | | | | | | | | | | | | | | 'boot_args' is an input args, and 'boot_command_line' has a fix length. So use strlcpy() instead of strcpy() to avoid memory overflow. Signed-off-by: Chen Gang <gang.chen@asianux.com> Acked-by: Kyle McMartin <kyle@mcmartin.ca> Signed-off-by: Helge Deller <deller@gmx.de>
| * parisc: rename "CONFIG_PA7100" to "CONFIG_PA7000"Paul Bolle2013-06-011-1/+1
| | | | | | | | | | | | | | | | | | | | There's a Makefile line setting cflags for CONFIG_PA7100. But that Kconfig macro doesn't exist. There is a Kconfig symbol PA7000, which covers both PA7000 and PA7100 processors. So let's use the corresponding Kconfig macro. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Helge Deller <deller@gmx.de>
| * parisc: fix kernel BUG at arch/parisc/include/asm/mmzone.h:50Helge Deller2013-06-011-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With CONFIG_DISCONTIGMEM=y and multiple physical memory areas, cat /proc/kpageflags triggers this kernel bug: kernel BUG at arch/parisc/include/asm/mmzone.h:50! CPU: 2 PID: 7848 Comm: cat Tainted: G D W 3.10.0-rc3-64bit #44 IAOQ[0]: kpageflags_read0x128/0x238 IAOQ[1]: kpageflags_read0x12c/0x238 RP(r2): proc_reg_read0xbc/0x130 Backtrace: [<00000000402ca2d4>] proc_reg_read0xbc/0x130 [<0000000040235bcc>] vfs_read0xc4/0x1d0 [<0000000040235f0c>] SyS_read0x94/0xf0 [<0000000040105fc0>] syscall_exit0x0/0x14 kpageflags_read() walks through the whole memory, even if some memory areas are physically not available. So, we should better not BUG on an unavailable pfn in pfn_to_nid() but just return the expected value -1 or 0. Signed-off-by: Helge Deller <deller@gmx.de>
| * parisc: memory overflow, 'name' length is too short for usingChen Gang2013-06-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'path.bc[i]' can be asigned by PCI_SLOT() which can '> 10', so sizeof(6 * "%u:" + "%u" + '\0') may be 21. Since 'name' length is 20, it may be memory overflow. And 'path.bc[i]' is 'unsigned char' for printing, we can be sure the max length of 'name' must be less than 28. So simplify thinking, we can use 28 instead of 20 directly, and do not think of whether 'patchc.bc[i]' can '> 100'. Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Helge Deller <deller@gmx.de>
* | Merge branch 'merge' of ↵Linus Torvalds2013-06-0126-123/+237
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull powerpc fixes from Ben Herrenschmidt: "Here are a few more fixes for powerpc 3.10. It's a bit more than I would have liked this late in the game but I suppose that's what happens with a brand new chip generation coming out. A few regression fixes, some last minute fixes for new P8 features such as transactional memory,... There's also one powerpc KVM patch that I requested that adds two missing functions to our in-kernel interrupt controller support which is itself a new 3.10 feature. These are defined by the base hypervisor specification. We didn't implement them originally because Linux doesn't use them but they are simple and I'm not comfortable having a half-implemented interface in 3.10 and having to deal with versionning etc... later when something starts needing those calls. They cannot be emulated in qemu when using in-kernel interrupt controller (not enough shared state). Just added a last minute patch to fix a typo introducing a breakage in our cputable for Power7+ processors, sorry about that, but the regression it fixes just hurt me :-)" * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc/cputable: Fix typo on P7+ cputable entry powerpc/perf: Add missing SIER support powerpc/perf: Revert to original NO_SIPR logic powerpc/pci: Remove the unused variables in pci_process_bridge_OF_ranges powerpc/pci: Remove the stale comments of pci_process_bridge_OF_ranges powerpc/pseries: Always enable CONFIG_HOTPLUG_CPU on PSERIES SMP powerpc/kvm/book3s: Add support for H_IPOLL and H_XIRR_X in XICS emulation powerpc/32bit:Store temporary result in r0 instead of r8 powerpc/mm: Always invalidate tlb on hpte invalidate and update powerpc/pseries: Improve stream generation comments in copypage/user powerpc/pseries: Kill all prefetch streams on context switch powerpc/cputable: Fix oprofile_cpu_type on power8 powerpc/mpic: Fix irq distribution problem when MPIC_SINGLE_DEST_CPU powerpc/tm: Fix userspace stack corruption on signal delivery for active transactions powerpc/tm: Move TM abort cause codes to uapi powerpc/tm: Abort on emulation and alignment faults powerpc/tm: Update cause codes documentation powerpc/tm: Make room for hypervisor in abort cause codes
| * powerpc/cputable: Fix typo on P7+ cputable entryWill Schmidt2013-06-011-1/+1
| | | | | | | | | | | | | | | | | | Fix a typo in setting COMMON_USER2_POWER7 bits to .cpu_user_features2 cpu specs table. Signed-off-by: Will Schmidt <will_schmidt@vnet.ibm.com> Acked-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/perf: Add missing SIER supportMichael Ellerman2013-06-011-12/+25
| | | | | | | | | | | | | | | | | | | | Commit 8f61aa3 "Add support for SIER" missed updates to siar_valid() and perf_get_data_addr(). In both cases we need to check the SIER instead of mmcra. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/perf: Revert to original NO_SIPR logicMichael Ellerman2013-06-011-24/+6
| | | | | | | | | | | | | | | | | | | | This is a revert and then some of commit 860aad7 "Add regs_no_sipr()". This workaround was only needed on early chip versions. As before NO_SIPR becomes a static flag of the PMU struct. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pci: Remove the unused variables in pci_process_bridge_OF_rangesKevin Hao2013-06-011-4/+1
| | | | | | | | | | | | | | | | The codes which ever used these two variables have gone. Throw away them too. Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pci: Remove the stale comments of pci_process_bridge_OF_rangesKevin Hao2013-06-011-9/+0
| | | | | | | | | | | | | | | | These comments already don't apply to the current code. So just remove them. Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Always enable CONFIG_HOTPLUG_CPU on PSERIES SMPSrivatsa S. Bhat2013-06-011-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adam Lackorzynski reported the following build failure on !CONFIG_HOTPLUG_CPU configuration: CC arch/powerpc/kernel/rtas.o arch/powerpc/kernel/rtas.c: In function ‘rtas_cpu_state_change_mask’: arch/powerpc/kernel/rtas.c:843:4: error: implicit declaration of function ‘cpu_down’ [-Werror=implicit-function-declaration] cc1: all warnings being treated as errors make[1]: *** [arch/powerpc/kernel/rtas.o] Error 1 make: *** [arch/powerpc/kernel] Error 2 The build fails because cpu_down() is defined only under CONFIG_HOTPLUG_CPU. Looking further, the mobility code in pseries is one of the call-sites which uses rtas_ibm_suspend_me(), which in turn calls rtas_cpu_state_change_mask(). And the mobility code is unconditionally compiled-in (it does not fall under any Kconfig option). And commit 120496ac (powerpc: Bring all threads online prior to migration/hibernation) which introduced this build regression is critical for the proper functioning of the migration code. So it appears that the only solution to this problem is to enable CONFIG_HOTPLUG_CPU if SMP is enabled on PPC_PSERIES platforms. So make that change in the Kconfig. Reported-by: Adam Lackorzynski <adam@os.inf.tu-dresden.de> Cc: stable@vger.kernel.org Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/kvm/book3s: Add support for H_IPOLL and H_XIRR_X in XICS emulationPaul Mackerras2013-06-014-0/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds the remaining two hypercalls defined by PAPR for manipulating the XICS interrupt controller, H_IPOLL and H_XIRR_X. H_IPOLL returns information about the priority and pending interrupts for a virtual cpu, without changing any state. H_XIRR_X is like H_XIRR in that it reads and acknowledges the highest-priority pending interrupt, but it also returns the timestamp (timebase register value) from when the interrupt was first received by the hypervisor. Currently we just return the current time, since we don't do any software queueing of virtual interrupts inside the XICS emulation code. These hcalls are not currently used by Linux guests, but may be in future. Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/32bit:Store temporary result in r0 instead of r8Priyanka Jain2013-06-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit a9c4e541ea9b22944da356f2a9258b4eddcc953b "powerpc/kprobe: Complete kprobe and migrate exception frame" introduced a regression: While returning from exception handling in case of PREEMPT enabled, _TIF_NEED_RESCHED bit is checked in TI_FLAGS (thread_info flag) of current task. Only if this bit is set, it should continue with the process of calling preempt_schedule_irq() to schedule highest priority task if available. Current code assumes that r8 contains TI_FLAGS and check this for _TIF_NEED_RESCHED, but as r8 is modified in the code which executes before this check, r8 no longer contains the expected TI_FLAGS information. As a result check for comparison with _TIF_NEED_RESCHED was failing even if NEED_RESCHED bit is set in the current thread_info flag. Due to this, preempt_schedule_irq() and in turn scheduler was not getting called even if highest priority task is ready for execution. So, store temporary results in r0 instead of r8 to prevent r8 from getting modified as subsequent code is dependent on its value. Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com> CC: <stable@vger.kernel.org> [v3.7+] Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/mm: Always invalidate tlb on hpte invalidate and updateAneesh Kumar K.V2013-06-011-8/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | If a hash bucket gets full, we "evict" a more/less random entry from it. When we do that we don't invalidate the TLB (hpte_remove) because we assume the old translation is still technically "valid". This implies that when we are invalidating or updating pte, even if HPTE entry is not valid we should do a tlb invalidate. This was a regression introduced by b1022fbd293564de91596b8775340cf41ad5214c Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Improve stream generation comments in copypage/userMichael Neuling2013-06-012-13/+18
| | | | | | | | | | | | | | No code changes, just documenting what's happening a little better. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pseries: Kill all prefetch streams on context switchMichael Neuling2013-06-012-0/+18
| | | | | | | | | | | | | | | | | | | | | | On context switch, we should have no prefetch streams leak from one userspace process to another. This frees up prefetch resources for the next process. Based on patch from Milton Miller. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/cputable: Fix oprofile_cpu_type on power8Nishanth Aravamudan2013-06-011-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | Maynard informed me that neither the oprofile kernel module nor oprofile userspace has been updated to support that "legacy" oprofile module interface for power8, which is indicated by "ppc64/power8." This results in no samples. The solution is to default to the "timer" type, instead. The raw entry also should be updated, as "ppc64/ibm-compat-v1" indicates to oprofile userspace to use "compatibility events" which are obsolete in ISA 2.07. Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/mpic: Fix irq distribution problem when MPIC_SINGLE_DEST_CPUchenhui zhao2013-06-011-2/+2
| | | | | | | | | | | | | | | | | | | | For the mpic with a flag MPIC_SINGLE_DEST_CPU, only one bit should be set in interrupt destination registers. The code is applicable to 64-bit platforms as well as 32-bit. Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/tm: Fix userspace stack corruption on signal delivery for active ↵Michael Neuling2013-06-016-36/+55
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | transactions When in an active transaction that takes a signal, we need to be careful with the stack. It's possible that the stack has moved back up after the tbegin. The obvious case here is when the tbegin is called inside a function that returns before a tend. In this case, the stack is part of the checkpointed transactional memory state. If we write over this non transactionally or in suspend, we are in trouble because if we get a tm abort, the program counter and stack pointer will be back at the tbegin but our in memory stack won't be valid anymore. To avoid this, when taking a signal in an active transaction, we need to use the stack pointer from the checkpointed state, rather than the speculated state. This ensures that the signal context (written tm suspended) will be written below the stack required for the rollback. The transaction is aborted becuase of the treclaim, so any memory written between the tbegin and the signal will be rolled back anyway. For signals taken in non-TM or suspended mode, we use the normal/non-checkpointed stack pointer. Tested with 64 and 32 bit signals Signed-off-by: Michael Neuling <mikey@neuling.org> Cc: <stable@vger.kernel.org> # v3.9 Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/tm: Move TM abort cause codes to uapiMichael Neuling2013-06-014-14/+21
| | | | | | | | | | | | | | | | These cause codes are usable by userspace, so let's export to uapi. Signed-off-by: Michael Neuling <mikey@neuling.org> Cc: <stable@vger.kernel.org> # v3.9 Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/tm: Abort on emulation and alignment faultsMichael Neuling2013-06-012-0/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If we are emulating an instruction inside an active user transaction that touches memory, the kernel can't emulate it as it operates in transactional suspend context. We need to abort these transactions and send them back to userspace for the hardware to rollback. We can service these if the user transaction is in suspend mode, since the kernel will operate in the same suspend context. This adds a check to all alignment faults and to specific instruction emulations (only string instructions for now). If the user process is in an active (non-suspended) transaction, we abort the transaction go back to userspace allowing the HW to roll back the transaction and tell the user of the failure. This also adds new tm abort cause codes to report the reason of the persistent error to the user. Crappy test case here http://neuling.org/devel/junkcode/aligntm.c Signed-off-by: Michael Neuling <mikey@neuling.org> Cc: <stable@vger.kernel.org> # v3.9 Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/tm: Make room for hypervisor in abort cause codesMichael Neuling2013-06-011-7/+8
| | | | | | | | | | | | | | | | | | | | | | PAPR carves out 0xff-0xe0 for hypervisor use of transactional memory software abort cause codes. Unfortunately we don't respect this currently. Below fixes this to move our cause codes to below this region. Signed-off-by: Michael Neuling <mikey@neuling.org> Cc: <stable@vger.kernel.org> # 3.9 only Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | Merge tag 'arm64-stable' of ↵Linus Torvalds2013-05-314-6/+25
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64 Pull arm64 fixes from Catalin Marinas: - Module compilation issues (symbol not exported). - Plug a hole where user space can bring the kernel down. * tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64: arm64: don't kill the kernel on a bad esr from el0 arm64: treat unhandled compat el0 traps as undef arm64: Do not report user faults for handled signals arm64: kernel: compiling issue, need 'EXPORT_SYMBOL(clear_page)'
| * | arm64: don't kill the kernel on a bad esr from el0Mark Rutland2013-05-311-3/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather than completely killing the kernel if we receive an esr value we can't deal with in the el0 handlers, send the process a SIGILL and log the esr value in the hope that we can debug it. If we receive a bad esr from el1, we'll die() as before. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: stable@vger.kernel.org
| * | arm64: treat unhandled compat el0 traps as undefMark Rutland2013-05-311-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, if a compat process reads or writes from/to a disabled cp15/cp14 register, the trap is not handled by the el0_sync_compat handler, and the kernel will head to bad_mode, where it will die(), and oops(). For 64 bit processes, disabled system register accesses are currently treated as unhandled instructions. This patch modifies entry.S to treat these unhandled traps as undefined instructions, sending a SIGILL to userspace. This gives processes a chance to handle this and stop using inaccessible registers, and prevents further issues in the kernel as a result of the die(). Reported-by: Johannes Jensen <Johannes.Jensen@arm.com> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * | arm64: Do not report user faults for handled signalsCatalin Marinas2013-05-242-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | Currently user faults (page, undefined instruction) are always reported even though the user may have a signal handler for them. This patch adds unhandled_signal() check together with printk_ratelimit() for these cases. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * | arm64: kernel: compiling issue, need 'EXPORT_SYMBOL(clear_page)'Chen Gang2013-05-241-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Need 'EXPORT_SYMBOL(clear_page)' if building with allmodconfig. The related errors: ERROR: "clear_page" [fs/ocfs2/dlm/ocfs2_dlm.ko] undefined! ERROR: "clear_page" [fs/ntfs/ntfs.ko] undefined! ERROR: "clear_page" [fs/gfs2/gfs2.ko] undefined! ERROR: "clear_page" [fs/fuse/fuse.ko] undefined! ERROR: "clear_page" [fs/ext3/ext3.ko] undefined! ERROR: "clear_page" [fs/ext2/ext2.ko] undefined! ERROR: "clear_page" [fs/exofs/libore.ko] undefined! ERROR: "clear_page" [fs/exofs/exofs.ko] undefined! ERROR: "clear_page" [drivers/block/brd.ko] undefined! Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* | | Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds2013-05-315-15/+83
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Peter Anvin: - Three EFI-related fixes - Two early memory initialization fixes - build fix for older binutils - fix for an eager FPU performance regression -- currently we don't allow the use of the FPU at interrupt time *at all* in eager mode, which is clearly wrong. * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86: Allow FPU to be used at interrupt time even with eagerfpu x86, crc32-pclmul: Fix build with older binutils x86-64, init: Fix a possible wraparound bug in switchover in head_64.S x86, range: fix missing merge during add range x86, efi: initial the local variable of DataSize to zero efivar: fix oops in efivar_update_sysfs_entries() caused by memory reuse efivarfs: Never return ENOENT from firmware again
| * | | x86: Allow FPU to be used at interrupt time even with eagerfpuPekka Riikonen2013-05-311-9/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With the addition of eagerfpu the irq_fpu_usable() now returns false negatives especially in the case of ksoftirqd and interrupted idle task, two common cases for FPU use for example in networking/crypto. With eagerfpu=off FPU use is possible in those contexts. This is because of the eagerfpu check in interrupted_kernel_fpu_idle(): ... * For now, with eagerfpu we will return interrupted kernel FPU * state as not-idle. TBD: Ideally we can change the return value * to something like __thread_has_fpu(current). But we need to * be careful of doing __thread_clear_has_fpu() before saving * the FPU etc for supporting nested uses etc. For now, take * the simple route! ... if (use_eager_fpu()) return 0; As eagerfpu is automatically "on" on those CPUs that also have the features like AES-NI this patch changes the eagerfpu check to return 1 in case the kernel_fpu_begin() has not been said yet. Once it has been the __thread_has_fpu() will start returning 0. Notice that with eagerfpu the __thread_has_fpu is always true initially. FPU use is thus always possible no matter what task is under us, unless the state has already been saved with kernel_fpu_begin(). [ hpa: this is a performance regression, not a correctness regression, but since it can be quite serious on CPUs which need encryption at interrupt time I am marking this for urgent/stable. ] Signed-off-by: Pekka Riikonen <priikone@iki.fi> Link: http://lkml.kernel.org/r/alpine.GSO.2.00.1305131356320.18@git.silcnet.org Cc: <stable@vger.kernel.org> v3.7+ Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | x86, crc32-pclmul: Fix build with older binutilsJan Beulich2013-05-312-3/+73
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | binutils prior to 2.18 (e.g. the ones found on SLE10) don't support assembling PEXTRD, so a macro based approach like the one for PCLMULQDQ in the same file should be used. This requires making the helper macros capable of recognizing 32-bit general purpose register operands. [ hpa: tagging for stable as it is a low risk build fix ] Signed-off-by: Jan Beulich <jbeulich@suse.com> Link: http://lkml.kernel.org/r/51A6142A02000078000D99D8@nat28.tlf.novell.com Cc: Alexander Boyko <alexander_boyko@xyratex.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Huang Ying <ying.huang@intel.com> Cc: <stable@vger.kernel.org> v3.9 Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | x86-64, init: Fix a possible wraparound bug in switchover in head_64.SZhang Yanfei2013-05-291-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In head_64.S, a switchover has been used to handle kernel crossing 1G, 512G boundaries. And commit 8170e6bed465b4b0c7687f93e9948aca4358a33b x86, 64bit: Use a #PF handler to materialize early mappings on demand said: During the switchover in head_64.S, before #PF handler is available, we use three pages to handle kernel crossing 1G, 512G boundaries with sharing page by playing games with page aliasing: the same page is mapped twice in the higher-level tables with appropriate wraparound. But from the switchover code, when we set up the PUD table: 114 addq $4096, %rdx 115 movq %rdi, %rax 116 shrq $PUD_SHIFT, %rax 117 andl $(PTRS_PER_PUD-1), %eax 118 movq %rdx, (4096+0)(%rbx,%rax,8) 119 movq %rdx, (4096+8)(%rbx,%rax,8) It seems line 119 has a potential bug there. For example, if the kernel is loaded at physical address 511G+1008M, that is 000000000 111111111 111111000 000000000000000000000 and the kernel _end is 512G+2M, that is 000000001 000000000 000000001 000000000000000000000 So in this example, when using the 2nd page to setup PUD (line 114~119), rax is 511. In line 118, we put rdx which is the address of the PMD page (the 3rd page) into entry 511 of the PUD table. But in line 119, the entry we calculate from (4096+8)(%rbx,%rax,8) has exceeded the PUD page. IMO, the entry in line 119 should be wraparound into entry 0 of the PUD table. The patch fixes the bug. Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Link: http://lkml.kernel.org/r/5191DE5A.3020302@cn.fujitsu.com Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: <stable@vger.kernel.org> v3.9 Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | Merge tag 'efi-urgent' into x86/urgentH. Peter Anvin2013-05-221-1/+1
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Avoid confusing the user by returning -EIO instead of -ENOENT in efivarfs if an EFI variable gets deleted from under us and return EOF when reading from a zero-length file - Lingzhu Xiang * Fix an oops in efivar_update_sysfs_entries() caused by reusing (and therefore corrupting) a kzalloc() allocation - Seiji Aguchi * Initialise the DataSize argument to GetVariable() otherwise it will not be updated with the actual size of the variable on return. Discovered on a Acer Aspire V3 BIOS - Lee, Chun-Yi Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| | * | | x86, efi: initial the local variable of DataSize to zeroLee, Chun-Yi2013-05-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | That will be better initial the value of DataSize to zero for the input of GetVariable(), otherwise we will feed a random value. The debug log of input DataSize like this: ... [ 195.915612] EFI Variables Facility v0.08 2004-May-17 [ 195.915819] efi: size: 18446744071581821342 [ 195.915969] efi: size': 18446744071581821342 [ 195.916324] efi: size: 18446612150714306560 [ 195.916632] efi: size': 18446612150714306560 [ 195.917159] efi: size: 18446612150714306560 [ 195.917453] efi: size': 18446612150714306560 ... The size' is value that was returned by BIOS. After applied this patch: [ 82.442042] EFI Variables Facility v0.08 2004-May-17 [ 82.442202] efi: size: 0 [ 82.442360] efi: size': 1039 [ 82.443828] efi: size: 0 [ 82.444127] efi: size': 2616 [ 82.447057] efi: size: 0 [ 82.447356] efi: size': 5832 ... Found on Acer Aspire V3 BIOS, it will not return the size of data if we input a non-zero DataSize. Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Lee, Chun-Yi <jlee@suse.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
* | | | | Merge tag 'stable/for-linus-3.10-rc3-tag' of ↵Linus Torvalds2013-05-302-7/+4
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen Pull Xen fixes from Konrad Rzeszutek Wilk: - Use proper error paths - Clean up APIC IPI usage (incorrect arguments) - Delay XenBus frontend resume is backend (xenstored) is not running - Fix build error with various combinations of CONFIG_ * tag 'stable/for-linus-3.10-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xenbus_client.c: correct exit path for xenbus_map_ring_valloc_hvm xen-pciback: more uses of cached MSI-X capability offset xen: Clean up apic ipi interface xenbus: save xenstore local status for later use xenbus: delay xenbus frontend resume if xenstored is not running xmem/tmem: fix 'undefined variable' build error.
| * | | | | xen: Clean up apic ipi interfaceStefan Bader2013-05-292-7/+4
| | |/ / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit f447d56d36af18c5104ff29dcb1327c0c0ac3634 introduced the implementation of the PV apic ipi interface. But there were some odd things (it seems none of which cause really any issue but maybe they should be cleaned up anyway): - xen_send_IPI_mask_allbutself (and by that xen_send_IPI_allbutself) ignore the passed in vector and only use the CALL_FUNCTION_SINGLE vector. While xen_send_IPI_all and xen_send_IPI_mask use the vector. - physflat_send_IPI_allbutself is declared unnecessarily. It is never used. This patch tries to clean up those things. Signed-off-by: Stefan Bader <stefan.bader@canonical.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | | | | Merge branch 'mn10300' (mn10300 fixes from David Howells)Linus Torvalds2013-05-303-13/+9
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge mn10300 fixes from David Howells. * emailed patches from David Howells <dhowells@redhat.com>: MN10300: Need pci_iomap() and __pci_ioport_map() defining MN10300: ASB2305's PCI code needs the definition of XIRQ1 MN10300: Enable IRQs more in system call exit work path MN10300: Fix ret_from_kernel_thread
| * | | | | MN10300: Need pci_iomap() and __pci_ioport_map() definingDavid Howells2013-05-301-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Include the generic definitions of pci_iomap() and __pci_ioport_map() otherwise we can get errors like: lib/pci_iomap.c: In function 'pci_iomap': lib/pci_iomap.c:37: error: implicit declaration of function '__pci_ioport_map' lib/pci_iomap.c:37: warning: return makes pointer from integer without a cast and: drivers/pci/quirks.c: In function 'disable_igfx_irq': drivers/pci/quirks.c:2893: error: implicit declaration of function 'pci_iomap' drivers/pci/quirks.c:2893: warning: initialization makes pointer from integer without a cast drivers/pci/quirks.c: In function 'reset_ivb_igd': drivers/pci/quirks.c:3133: warning: assignment makes pointer from integer without a cast Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Ken Cox <jkc@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | | | MN10300: ASB2305's PCI code needs the definition of XIRQ1David Howells2013-05-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The code for PCI in the ASB2305 needs the definition of XIRQ1 from proc/irq.h otherwise the following error appears: arch/mn10300/unit-asb2305/pci.c: In function 'unit_pci_init': arch/mn10300/unit-asb2305/pci.c:481: error: 'XIRQ1' undeclared (first use in this function) arch/mn10300/unit-asb2305/pci.c:481: error: (Each undeclared identifier is reported only once arch/mn10300/unit-asb2305/pci.c:481: error: for each function it appears in.) Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Ken Cox <jkc@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | | | MN10300: Enable IRQs more in system call exit work pathDavid Howells2013-05-301-13/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enable IRQs when calling schedule() for TIF_NEED_RESCHED and do_notify_resume(). If interrupts are enabled during do_notify_resume(), a warning can be seen (see lower down). Whilst we're at it, resume_userspace can be made local to entry.S as it is not called outside of there and it can be merged with the part of work_resched that occurs after schedule() is called. WARNING: at kernel/softirq.c:160 local_bh_enable+0x42/0xa0() Call Trace: local_bh_enable+0x42/0xa0 unix_release_sock+0x86/0x23c unix_release+0x20/0x28 sock_release+0x17/0x88 sock_close+0x20/0x28 __fput+0xc9/0x1fc ____fput+0xb/0x10 task_work_run+0x64/0x78 do_notify_resume+0x53d/0x544 work_notifysig+0xa/0xc Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Ken Cox <jkc@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | | | MN10300: Fix ret_from_kernel_threadDavid Howells2013-05-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ret_from_kernel_thread needs to set A2 to the thread_info pointer before jumping to syscall_exit. Without this, we never correctly start userspace. This was caused by the rejuggling of the fork/exec paths in commit ddf23e87a804 ("mn10300: switch to saner kernel_execve() semantics") Reported-by: Ken Cox <jkc@redhat.com> Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Ken Cox <jkc@redhat.com> Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | | Merge tag 'pinctrl-fixes-v3.10-3' of ↵Linus Torvalds2013-05-301-1/+13
|\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl Pull pin-control fixes from Linus Walleij: - Six patches fixing up the suspend/resume and wakeup handling of the Samsung and Exynos drivers. - Errorpath fixes for four different drivers. All on the probe() errorpath. - Make the debugfs code for pin config take the right mutex. * tag 'pinctrl-fixes-v3.10-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: pinctrl: pinconf: take the right mutex pinctrl: sunxi: fix error return code in sunxi_pinctrl_probe() pinctrl: exynos: Handle suspend/resume of GPIO EINT registers pinctrl: samsung: Allow per-bank SoC-specific private data pinctrl: samsung: Add support for SoC-specific suspend/resume callbacks pinctrl: Don't override the error code in probe error handling ARM: EXYNOS: Fix EINT wake-up mask configuration when pinctrl is used pinctrl: exynos: Add support for set_irq_wake of wake-up EINTs pinctrl: samsung: fix suspend/resume functionality
| * | | | | | ARM: EXYNOS: Fix EINT wake-up mask configuration when pinctrl is usedTomasz Figa2013-05-271-1/+13
| |/ / / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On DT-enabled systems pinctrl-exynos driver is responsible for handling of wake-up EINT interrupts. This patch adjusts wake-up mask configuration code to take wake-up mask value from pinctrl-exynos driver on DT-enabled systems. Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Tested-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | | | | | Merge tag 'fixes-for-linus' of ↵Linus Torvalds2013-05-297-17/+107
|\ \ \ \ \ \ | |_|_|_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM Exynos fixes from Olof Johansson: "Here's a shorter set of fixes for 3.10, all for Samsung Exynos platforms. It also includes a defconfig update so that exynos_defconfig provides a meaningful set of drivers to boot an unmodified kernel on the Samsung ARM-based Chromebooks." * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: exynos: defconfig update ARM: SAMSUNG: Add names to fimd0 IRQ resources ARM: EXYNOS: fix software reset logic for EXYNOS5440 SOC ARM: EXYNOS: Fix support of Exynos4210 rev0 SoC ARM: dts: Enabling samsung-usb2phy driver for exynos5250
| * | | | | ARM: exynos: defconfig updateOlof Johansson2013-05-291-8/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This turns on a number of configs that are useful on the Chromebook, but also good to have on in general: * USB host and MMC drivers(!) * I2C GPIO arbitration driver * CYAPA trackpad driver * simplefb * CROS EC and keyboard drivers * S5M8767 driver * MAX77686 drivers * MAX8997 driver * DEVTMPFS + mount * DM_CRYPT (as module) * CRYPTOLOOP * HIGHMEM * PRINTK timestamps This also turns off DEBUG_LL, and switches the hardcoded Samsung lowlevel uart to uart 3 (which is only used to show the "uncompressing kernel" message at boot, it seems). Signed-off-by: Olof Johansson <olof@lixom.net> Reviewed-by: Doug Anderson <dianders@chromium.org> Tested-by: Tushar Behera <tushar.behera@linaro.org> Acked-by: Kukjin Kim <kgene.kim@samsung.com>
| * | | | | Merge tag 'samsung-fixes-3' of ↵Olof Johansson2013-05-286-9/+61
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes From Kukjin Kim: Fixes following for v3.10 - to get usb2 working on the Chromebook with adding the usb phy node for usb2 on exynos5250 - supporting exynos4210 rev0 SoC - exynos5440 restart applying only to powered-on domains - drm-exynos probe failure with adding resource names to fimd0 platform device * tag 'samsung-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: ARM: SAMSUNG: Add names to fimd0 IRQ resources ARM: EXYNOS: fix software reset logic for EXYNOS5440 SOC ARM: EXYNOS: Fix support of Exynos4210 rev0 SoC ARM: dts: Enabling samsung-usb2phy driver for exynos5250
| | * | | | | ARM: SAMSUNG: Add names to fimd0 IRQ resourcesTomasz Figa2013-05-241-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit 1977e6d8 (drm/exynos: change the method for getting the interrupt) the Exynos DRM FIMD driver requires IRQ resources to be named. This patch fixes probe failure in non-DT cases by adding appropriate resource names to fimd0 platform device. Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
| | * | | | | ARM: EXYNOS: fix software reset logic for EXYNOS5440 SOCJungseok Lee2013-05-241-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes software reset logic. Software reset applies only to powered-on domains in SOC because software reset to all domains causes reboot failure. Signed-off-by: Jungseok Lee <jays.lee@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
| | * | | | | ARM: EXYNOS: Fix support of Exynos4210 rev0 SoCTomasz Figa2013-05-244-5/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch extends exynos_init_time() function to handle Exynos4210 rev0 SoC, which differs in availability of system timers and needs different clocksource initialization. This makes it possible to use exynos_init_time() function as init_time callback for all Exynos-based boards, including Universal_C210, which originally had to use samsung_timer_init(). Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
| | * | | | | ARM: dts: Enabling samsung-usb2phy driver for exynos5250Vivek Gautam2013-05-201-0/+15
| | | |/ / / | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adding usbphy node for Exynos5250 along with the necessary device data to be parsed. Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-14 22:38:55 +0100