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* parisc: fix PMD pages allocation by restoring pmd_alloc_one()Mike Rapoport2020-08-161-0/+6
| | | | | | | | | | | | | | | | | | | Commit 1355c31eeb7e ("asm-generic: pgalloc: provide generic pmd_alloc_one() and pmd_free_one()") converted parisc to use generic version of pmd_alloc_one() but it missed the fact that parisc uses order-1 pages for PMD. Restore the original version of pmd_alloc_one() for parisc, just use GFP_PGTABLE_KERNEL that implies __GFP_ZERO instead of GFP_KERNEL and memset. Fixes: 1355c31eeb7e ("asm-generic: pgalloc: provide generic pmd_alloc_one() and pmd_free_one()") Reported-by: Meelis Roos <mroos@linux.ee> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Tested-by: Meelis Roos <mroos@linux.ee> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Link: https://lkml.kernel.org/r/9f2b5ebd-e4a4-0fa1-6cd3-4b9f6892d1ad@linux.ee Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge tag 'riscv-for-linus-5.9-mw1' of ↵Linus Torvalds2020-08-161-8/+17
|\ | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux Pull RISC-V fix from Palmer Dabbelt: "I collected a single fix during the merge window: we managed to break the early trap setup on !MMU, this fixes it" * tag 'riscv-for-linus-5.9-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: riscv: Setup exception vector for nommu platform
| * riscv: Setup exception vector for nommu platformQiu Wenbo2020-08-151-8/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | Exception vector is missing on nommu platform and that is an issue. This patch is tested in Sipeed Maix Bit Dev Board. Fixes: 79b1feba5455 ("RISC-V: Setup exception vector early") Suggested-by: Anup Patel <anup@brainfault.org> Suggested-by: Atish Patra <atishp@atishpatra.org> Signed-off-by: Qiu Wenbo <qiuwenbo@phytium.com.cn> Reviewed-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Anup Patel <anup@brainfault.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* | Merge tag 'sh-for-5.9' of git://git.libc.org/linux-shLinus Torvalds2020-08-1666-995/+360
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull arch/sh updates from Rich Felker: "Cleanup, SECCOMP_FILTER support, message printing fixes, and other changes to arch/sh" * tag 'sh-for-5.9' of git://git.libc.org/linux-sh: (34 commits) sh: landisk: Add missing initialization of sh_io_port_base sh: bring syscall_set_return_value in line with other architectures sh: Add SECCOMP_FILTER sh: Rearrange blocks in entry-common.S sh: switch to copy_thread_tls() sh: use the generic dma coherent remap allocator sh: don't allow non-coherent DMA for NOMMU dma-mapping: consolidate the NO_DMA definition in kernel/dma/Kconfig sh: unexport register_trapped_io and match_trapped_io_handler sh: don't include <asm/io_trapped.h> in <asm/io.h> sh: move the ioremap implementation out of line sh: move ioremap_fixed details out of <asm/io.h> sh: remove __KERNEL__ ifdefs from non-UAPI headers sh: sort the selects for SUPERH alphabetically sh: remove -Werror from Makefiles sh: Replace HTTP links with HTTPS ones arch/sh/configs: remove obsolete CONFIG_SOC_CAMERA* sh: stacktrace: Remove stacktrace_ops.stack() sh: machvec: Modernize printing of kernel messages sh: pci: Modernize printing of kernel messages ...
| * | sh: landisk: Add missing initialization of sh_io_port_baseGeert Uytterhoeven2020-08-151-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Landisk setup code maps the CF IDE area using ioremap_prot(), and passes the resulting virtual addresses to the pata_platform driver, disguising them as I/O port addresses. Hence the pata_platform driver translates them again using ioport_map(). As CONFIG_GENERIC_IOMAP=n, and CONFIG_HAS_IOPORT_MAP=y, the SuperH-specific mapping code in arch/sh/kernel/ioport.c translates I/O port addresses to virtual addresses by adding sh_io_port_base, which defaults to -1, thus breaking the assumption of an identity mapping. Fix this by setting sh_io_port_base to zero. Fixes: 37b7a97884ba64bf ("sh: machvec IO death.") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: bring syscall_set_return_value in line with other architecturesMichael Karcher2020-08-151-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Other architectures expect that syscall_set_return_value gets an already negative value as error. That's also what kernel/seccomp.c provides. Signed-off-by: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de> Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: Add SECCOMP_FILTERMichael Karcher2020-08-153-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | Port sh to use the new SECCOMP_FILTER code. Signed-off-by: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de> Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: Rearrange blocks in entry-common.SMichael Karcher2020-08-151-28/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | This avoids out-of-range jumps that get auto-replaced by the assembler and prepares for the changes needed to implement SECCOMP_FILTER cleanly. Signed-off-by: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de> Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: switch to copy_thread_tls()Christian Brauner2020-08-152-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the copy_thread_tls() calling convention which passes tls through a register. This is required so we can remove the copy_thread{_tls}() split and remove the HAVE_COPY_THREAD_TLS macro. Cc: Rich Felker <dalias@libc.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: linux-sh@vger.kernel.org Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: use the generic dma coherent remap allocatorChristoph Hellwig2020-08-152-49/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This switches to using common code for the DMA allocations, including potential use of the CMA allocator if configured. Switching to the generic code enables DMA allocations from atomic context, which is required by the DMA API documentation, and also adds various other minor features drivers start relying upon. It also makes sure we have on tested code base for all architectures that require uncached pte bits for coherent DMA allocations. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: don't allow non-coherent DMA for NOMMUChristoph Hellwig2020-08-151-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | The code handling non-coherent DMA depends on being able to remap code as non-cached. But that can't be done without an MMU, so using this option on NOMMU builds is broken. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Rich Felker <dalias@libc.org>
| * | dma-mapping: consolidate the NO_DMA definition in kernel/dma/KconfigChristoph Hellwig2020-08-153-6/+3
| | | | | | | | | | | | | | | | | | | | | Have a single definition that architetures can select. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: unexport register_trapped_io and match_trapped_io_handlerChristoph Hellwig2020-08-151-2/+0
| | | | | | | | | | | | | | | | | | | | | Both functions are only used by compiled in core code. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: don't include <asm/io_trapped.h> in <asm/io.h>Christoph Hellwig2020-08-153-1/+2
| | | | | | | | | | | | | | | | | | | | | No need to expose the details of trapped I/O to drivers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: move the ioremap implementation out of lineChristoph Hellwig2020-08-152-86/+68
| | | | | | | | | | | | | | | | | | | | | | | | Move the internal implementation details of ioremap out of line, no need to expose any of this to drivers for a slow path API. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: move ioremap_fixed details out of <asm/io.h>Christoph Hellwig2020-08-155-16/+26
| | | | | | | | | | | | | | | | | | | | | | | | ioremap_fixed is an internal implementation detail and should not be exposed to drivers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: remove __KERNEL__ ifdefs from non-UAPI headersChristoph Hellwig2020-08-1519-54/+0
| | | | | | | | | | | | | | | | | | | | | | | | There is no point in having __KERNEL__ ifdefs in headers not exported to userspace. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: sort the selects for SUPERH alphabeticallyChristoph Hellwig2020-08-151-48/+47
| | | | | | | | | | | | | | | | | | | | | | | | Ensure there is an order for the selects. Also remove a duplicate one. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: remove -Werror from MakefilesChristoph Hellwig2020-08-153-6/+0
| | | | | | | | | | | | | | | | | | | | | | | | The sh build is full of warnings when building with gcc 9.2.1. While fixing those would be great, at least avoid failing the build. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: Replace HTTP links with HTTPS onesAlexander A. Klimov2020-08-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de> Signed-off-by: Rich Felker <dalias@libc.org>
| * | arch/sh/configs: remove obsolete CONFIG_SOC_CAMERA*Hans Verkuil2020-08-154-11/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Drop all configs with the CONFIG_SOC_CAMERA prefix since those have been removed. SOC_CAMERA support for the sh architecture was removed a long time ago. Drop it from the configs. Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: stacktrace: Remove stacktrace_ops.stack()Geert Uytterhoeven2020-08-155-29/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The SH implementation never called stacktrace_ops.stack(). Presumably this was copied from the x86 implementation. Hence remove the method, and all implementations (most of them are dummies). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: machvec: Modernize printing of kernel messagesGeert Uytterhoeven2020-08-151-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | - Convert from printk() to pr_*(), - Add missing continuations. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: pci: Modernize printing of kernel messagesGeert Uytterhoeven2020-08-153-21/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Convert from printk() to pr_*(), - Add missing continuations, - Join broken messages. Note that printk(KERN_DEBUG ...) is retained, to preserve behavior (pr_debug() is a dummy if DEBUG is not defined). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: sh2007: Modernize printing of kernel messagesGeert Uytterhoeven2020-08-151-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | - Convert from printk() to pr_*(), - Add missing continuation. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: process: Fix broken lines in register dumpsGeert Uytterhoeven2020-08-151-21/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | Rejoin the broken lines by using pr_cont(). Convert the remaining printk() calls to pr_*() while at it. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: dump_stack: Fix broken lines and ptrval in calltrace dumpsGeert Uytterhoeven2020-08-151-9/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rejoin the broken lines by dropping the log level parameters and using pr_cont(). Use "%px" to print sensible addresses in call traces. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: kernel: disassemble: Fix broken lines in disassembly dumpsGeert Uytterhoeven2020-08-151-51/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | Rejoin the broken lines by using pr_cont(). Convert the remaining printk() calls to pr_*() while at it. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Rich Felker <dalias@libc.org>
| * | Revert "sh: remove needless printk()"Geert Uytterhoeven2020-08-151-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit 8b92f34877225c8eb85e3ab7f1177fc248ba26d0. "data" became the log level in commit 539e786cc37ee5cb ("sh: add loglvl to show_trace()"), so we do need to keep the printk() before the continuation in print_trace_address(). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rich Felker <dalias@libc.org>
| * | Revert "sh: add loglvl to printk_address()"Geert Uytterhoeven2020-08-153-6/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit 2deebe4d56d638269a4a728086d64de5734b460a. printk_address() is always used as a continuation of the previous logging, hence it should not include a log level. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: fault: Fix duplicate printing of "PC:"Geert Uytterhoeven2020-08-151-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Somewhere along the patch handling path, both the old "printk(KERN_ALERT ....)" and the new "pr_alert(...)" were retained, leading to the duplicate printing of "PC:". Drop the old one. Fixes: eaabf98b0932a540 ("sh: fault: modernize printing of kernel messages") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: Remove SH5-based Cayman platformGeert Uytterhoeven2020-08-1511-540/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Since the removal of core support for SH5, Cayman support can no longer be selected. Fixes: 37744feebc086908 ("sh: remove sh5 support") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rich Felker <dalias@libc.org>
| * | arch: sh: smc37c93x: fix spelling mistakeFlavio Suligoi2020-08-151-2/+2
| | | | | | | | | | | | | | | | | | | | | Fix typo: "triger" --> "trigger" Signed-off-by: Flavio Suligoi <f.suligoi@asem.it> Signed-off-by: Rich Felker <dalias@libc.org>
| * | Revert "sh: add missing EXPORT_SYMBOL() for __delay"Geert Uytterhoeven2020-08-151-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit d1f56f318d234fc5db230af2f3e0088f689ab3c0. __delay() is an internal implementation detail on several architectures. Drivers should not call __delay() directly, as it has non-standardized semantics, or may not even exist. Hence there is no need to export __delay() to modules. See also include/asm-generic/delay.h: /* Undefined functions to get compile-time errors */ ... extern void __delay(unsigned long loops); Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: Implement __get_user_u64() required for 64-bit get_user()John Paul Adrian Glaubitz2020-08-151-0/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Trying to build the kernel with CONFIG_INFINIBAND_USER_ACCESS enabled fails ERROR: "__get_user_unknown" [drivers/infiniband/core/ib_uverbs.ko] undefined! with on SH since the kernel misses a 64-bit implementation of get_user(). Implement the missing 64-bit get_user() as __get_user_u64(), matching the already existing __put_user_u64() which implements the 64-bit put_user(). Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Acked-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: remove call to memset after dma_alloc_coherentChen Zhou2020-08-151-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | Function dma_alloc_coherent use in buf already zeroes out memory, so memset is not needed. Signed-off-by: Chen Zhou <chenzhou10@huawei.com> Signed-off-by: Rich Felker <dalias@libc.org>
| * | sh: Fix unneeded constructor in page table allocationMatthew Wilcox (Oracle)2020-08-151-4/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | The pgd kmem_cache allocation both specified __GFP_ZERO and had a constructor which makes no sense. Remove __GFP_ZERO and zero the user parts of the pgd explicitly. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Rich Felker <dalias@libc.org>
* | | Merge tag 'x86-urgent-2020-08-15' of ↵Linus Torvalds2020-08-157-17/+58
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Ingo Molnar: "Misc fixes and small updates all around the place: - Fix mitigation state sysfs output - Fix an FPU xstate/sxave code assumption bug triggered by Architectural LBR support - Fix Lightning Mountain SoC TSC frequency enumeration bug - Fix kexec debug output - Fix kexec memory range assumption bug - Fix a boundary condition in the crash kernel code - Optimize porgatory.ro generation a bit - Enable ACRN guests to use X2APIC mode - Reduce a __text_poke() IRQs-off critical section for the benefit of PREEMPT_RT" * tag 'x86-urgent-2020-08-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/alternatives: Acquire pte lock with interrupts enabled x86/bugs/multihit: Fix mitigation reporting when VMX is not in use x86/fpu/xstate: Fix an xstate size check warning with architectural LBRs x86/purgatory: Don't generate debug info for purgatory.ro x86/tsr: Fix tsc frequency enumeration bug on Lightning Mountain SoC kexec_file: Correctly output debugging information for the PT_LOAD ELF header kexec: Improve & fix crash_exclude_mem_range() to handle overlapping ranges x86/crash: Correct the address boundary of function parameters x86/acrn: Remove redundant chars from ACRN signature x86/acrn: Allow ACRN guest to use X2APIC mode
| * | | x86/alternatives: Acquire pte lock with interrupts enabledSebastian Andrzej Siewior2020-08-131-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | pte lock is never acquired in-IRQ context so it does not require interrupts to be disabled. The lock is a regular spinlock which cannot be acquired with interrupts disabled on RT. RT complains about pte_lock() in __text_poke() because it's invoked after disabling interrupts. __text_poke() has to disable interrupts as use_temporary_mm() expects interrupts to be off because it invokes switch_mm_irqs_off() and uses per-CPU (current active mm) data. Move the PTE lock handling outside the interrupt disabled region. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by; Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20200813105026.bvugytmsso6muljw@linutronix.de
| * | | x86/bugs/multihit: Fix mitigation reporting when VMX is not in usePawan Gupta2020-08-071-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On systems that have virtualization disabled or unsupported, sysfs mitigation for X86_BUG_ITLB_MULTIHIT is reported incorrectly as: $ cat /sys/devices/system/cpu/vulnerabilities/itlb_multihit KVM: Vulnerable System is not vulnerable to DoS attack from a rogue guest when virtualization is disabled or unsupported in the hardware. Change the mitigation reporting for these cases. Fixes: b8e8c8303ff2 ("kvm: mmu: ITLB_MULTIHIT mitigation") Reported-by: Nelson Dsouza <nelson.dsouza@linux.intel.com> Co-developed-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Tony Luck <tony.luck@intel.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/0ba029932a816179b9d14a30db38f0f11ef1f166.1594925782.git.pawan.kumar.gupta@linux.intel.com
| * | | x86/fpu/xstate: Fix an xstate size check warning with architectural LBRsKan Liang2020-08-071-1/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | An xstate size check warning is triggered on machines which support Architectural LBRs. XSAVE consistency problem, dumping leaves WARNING: CPU: 0 PID: 0 at arch/x86/kernel/fpu/xstate.c:649 fpu__init_system_xstate+0x4d4/0xd0e Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted intel-arch_lbr+ RIP: 0010:fpu__init_system_xstate+0x4d4/0xd0e The xstate size check routine, init_xstate_size(), compares the size retrieved from the hardware with the size of task->fpu, which is calculated by the software. The size from the hardware is the total size of the enabled xstates in XCR0 | IA32_XSS. Architectural LBR state is a dynamic supervisor feature, which sets the corresponding bit in the IA32_XSS at boot time. The size from the hardware includes the size of the Architectural LBR state. However, a dynamic supervisor feature doesn't allocate a buffer in the task->fpu. The size of task->fpu doesn't include the size of the Architectural LBR state. The mismatch will trigger the warning. Three options as below were considered to fix the issue: - Correct the size from the hardware by subtracting the size of the dynamic supervisor features. The purpose of the check is to compare the size CPU told with the size of the XSAVE buffer, which is calculated by the software. If the software mucks with the number from hardware, it removes the value of the check. This option is not a good option. - Prevent the hardware from counting the size of the dynamic supervisor feature by temporarily removing the corresponding bits in IA32_XSS. Two extra MSR writes are required to flip the IA32_XSS. The option is not pretty, but it is workable. The check is only called once at early boot time. The synchronization or context-switching doesn't need to be worried. This option is implemented here. - Remove the check entirely, because the check hasn't found any real problems. The option may be an alternative as option 2. This option is not implemented here. Add a new function, get_xsaves_size_no_dynamic(), which retrieves the total size without the dynamic supervisor features from the hardware. The size will be used to compare with the size of task->fpu. Fixes: f0dccc9da4c0 ("x86/fpu/xstate: Support dynamic supervisor feature for LBR") Reported-by: Chang S. Bae <chang.seok.bae@intel.com> Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Dave Hansen <dave.hansen@intel.com> Link: https://lore.kernel.org/r/1595253051-75374-1-git-send-email-kan.liang@linux.intel.com
| * | | x86/purgatory: Don't generate debug info for purgatory.roPingfan Liu2020-08-071-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Purgatory.ro is a standalone binary that is not linked against the rest of the kernel. Its image is copied into an array that is linked to the kernel, and from there kexec relocates it wherever it desires. Unlike the debug info for vmlinux, which can be used for analyzing crash such info is useless in purgatory.ro. And discarding them can save about 200K space. Original: 259080 kexec-purgatory.o Stripped debug info: 29152 kexec-purgatory.o Signed-off-by: Pingfan Liu <kernelfans@gmail.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Steve Wahl <steve.wahl@hpe.com> Acked-by: Dave Young <dyoung@redhat.com> Link: https://lore.kernel.org/r/1596433788-3784-1-git-send-email-kernelfans@gmail.com
| * | | x86/tsr: Fix tsc frequency enumeration bug on Lightning Mountain SoCDilip Kota2020-08-071-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Frequency descriptor of Lightning Mountain SoC doesn't have all the frequency entries so resulting in the below failure causing a kernel hang: Error MSR_FSB_FREQ index 15 is unknown tsc: Fast TSC calibration failed So, add all the frequency entries in the Lightning Mountain SoC frequency descriptor. Fixes: 0cc5359d8fd45 ("x86/cpu: Update init data for new Airmont CPU model") Fixes: 812c2d7506fd ("x86/tsc_msr: Use named struct initializers") Signed-off-by: Dilip Kota <eswara.kota@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/211c643ae217604b46cbec43a2c0423946dc7d2d.1596440057.git.eswara.kota@linux.intel.com
| * | | x86/crash: Correct the address boundary of function parametersLianbo Jiang2020-08-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Let's carefully handle the boundary of the function parameter to make sure that the arguments passed doesn't exceed the address range. Signed-off-by: Lianbo Jiang <lijiang@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Dave Young <dyoung@redhat.com> Link: https://lore.kernel.org/r/20200804044933.1973-2-lijiang@redhat.com
| * | | x86/acrn: Remove redundant chars from ACRN signatureShuo Liu2020-08-071-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | hypervisor_cpuid_base() only handles 12 chars of the hypervisor signature string but is provided with 14 chars. Remove the redundancy. Additionally, replace the user space uint32_t with preferred kernel type u32. Signed-off-by: Shuo Liu <shuo.a.liu@intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Link: https://lore.kernel.org/r/20200806114111.9448-1-shuo.a.liu@intel.com
| * | | x86/acrn: Allow ACRN guest to use X2APIC modeShuo Liu2020-08-071-6/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ACRN Hypervisor did not support x2APIC and thus x2APIC support was disabled by always returning false when VM checked for x2APIC support. ACRN received full support of x2APIC and exports the capability through CPUID feature bits. Let VM decide if it needs to switch to x2APIC mode according to CPUID features. Originally-by: Yakui Zhao <yakui.zhao@intel.com> Signed-off-by: Shuo Liu <shuo.a.liu@intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Link: https://lore.kernel.org/r/20200806113802.9325-1-shuo.a.liu@intel.com
* | | | Merge tag 'perf-urgent-2020-08-15' of ↵Linus Torvalds2020-08-151-10/+36
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Ingo Molnar: "Misc fixes, an expansion of perf syscall access to CAP_PERFMON privileged tools, plus a RAPL HW-enablement for Intel SPR platforms" * tag 'perf-urgent-2020-08-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/rapl: Add support for Intel SPR platform perf/x86/rapl: Support multiple RAPL unit quirks perf/x86/rapl: Fix missing psys sysfs attributes hw_breakpoint: Remove unused __register_perf_hw_breakpoint() declaration kprobes: Remove show_registers() function prototype perf/core: Take over CAP_SYS_PTRACE creds to CAP_PERFMON capability
| * | | | perf/x86/rapl: Add support for Intel SPR platformZhang Rui2020-08-141-0/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Intel SPR platform uses fixed 16 bit energy unit for DRAM RAPL domain, and fixed 0 bit energy unit for Psys RAPL domain. After this, on SPR platform the energy counters appear in perf list. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Kan Liang <kan.liang@linux.intel.com> Acked-by: Len Brown <len.brown@intel.com> Link: https://lore.kernel.org/r/20200811153149.12242-4-rui.zhang@intel.com
| * | | | perf/x86/rapl: Support multiple RAPL unit quirksZhang Rui2020-08-141-9/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There will be more platforms with different fixed energy units. Enhance the code to support different RAPL unit quirks for different platforms. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Len Brown <len.brown@intel.com> Link: https://lore.kernel.org/r/20200811153149.12242-3-rui.zhang@intel.com
| * | | | perf/x86/rapl: Fix missing psys sysfs attributesZhang Rui2020-08-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes a problem introduced by commit: 5fb5273a905c ("perf/x86/rapl: Use new MSR detection interface") that perf event sysfs attributes for psys RAPL domain are missing. Fixes: 5fb5273a905c ("perf/x86/rapl: Use new MSR detection interface") Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Len Brown <len.brown@intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Link: https://lore.kernel.org/r/20200811153149.12242-2-rui.zhang@intel.com
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 05:09:34 +0100