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2020-08-14sh: use the generic dma coherent remap allocatorChristoph Hellwig
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>
2020-08-14sh: don't allow non-coherent DMA for NOMMUChristoph Hellwig
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>
2020-08-14dma-mapping: consolidate the NO_DMA definition in kernel/dma/KconfigChristoph Hellwig
Have a single definition that architetures can select. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Rich Felker <dalias@libc.org>
2020-08-14sh: unexport register_trapped_io and match_trapped_io_handlerChristoph Hellwig
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>
2020-08-14sh: don't include <asm/io_trapped.h> in <asm/io.h>Christoph Hellwig
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>
2020-08-14sh: move the ioremap implementation out of lineChristoph Hellwig
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>
2020-08-14sh: move ioremap_fixed details out of <asm/io.h>Christoph Hellwig
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>
2020-08-14sh: remove __KERNEL__ ifdefs from non-UAPI headersChristoph Hellwig
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>
2020-08-14sh: sort the selects for SUPERH alphabeticallyChristoph Hellwig
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>
2020-08-14sh: remove -Werror from MakefilesChristoph Hellwig
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>
2020-08-14sh: Replace HTTP links with HTTPS onesAlexander A. Klimov
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>
2020-08-14arch/sh/configs: remove obsolete CONFIG_SOC_CAMERA*Hans Verkuil
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>
2020-08-14sh: stacktrace: Remove stacktrace_ops.stack()Geert Uytterhoeven
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>
2020-08-14sh: machvec: Modernize printing of kernel messagesGeert Uytterhoeven
- 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>
2020-08-14sh: pci: Modernize printing of kernel messagesGeert Uytterhoeven
- 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>
2020-08-14sh: sh2007: Modernize printing of kernel messagesGeert Uytterhoeven
- 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>
2020-08-14sh: process: Fix broken lines in register dumpsGeert Uytterhoeven
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>
2020-08-14sh: dump_stack: Fix broken lines and ptrval in calltrace dumpsGeert Uytterhoeven
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>
2020-08-14sh: kernel: disassemble: Fix broken lines in disassembly dumpsGeert Uytterhoeven
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>
2020-08-14Revert "sh: remove needless printk()"Geert Uytterhoeven
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>
2020-08-14Revert "sh: add loglvl to printk_address()"Geert Uytterhoeven
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>
2020-08-14sh: fault: Fix duplicate printing of "PC:"Geert Uytterhoeven
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>
2020-08-14sh: Remove SH5-based Cayman platformGeert Uytterhoeven
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>
2020-08-14arch: sh: smc37c93x: fix spelling mistakeFlavio Suligoi
Fix typo: "triger" --> "trigger" Signed-off-by: Flavio Suligoi <f.suligoi@asem.it> Signed-off-by: Rich Felker <dalias@libc.org>
2020-08-14Revert "sh: add missing EXPORT_SYMBOL() for __delay"Geert Uytterhoeven
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>
2020-08-14sh: Implement __get_user_u64() required for 64-bit get_user()John Paul Adrian Glaubitz
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>
2020-08-14sh: remove call to memset after dma_alloc_coherentChen Zhou
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>
2020-08-14sh: Fix unneeded constructor in page table allocationMatthew Wilcox (Oracle)
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>
2020-08-02Merge tag 'x86-urgent-2020-08-02' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fix from Ingo Molnar: "A single fix for a potential deadlock when printing a message about spurious interrupts" * tag 'x86-urgent-2020-08-02' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/i8259: Use printk_deferred() to prevent deadlock
2020-08-02Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull KVM fixes from Paolo Bonzini: "Bugfixes and strengthening the validity checks on inputs from new userspace APIs. Now I know why I shouldn't prepare pull requests on the weekend, it's hard to concentrate if your son is shouting about his latest Minecraft builds in your ear. Fortunately all the patches were ready and I just had to check the test results..." * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: SVM: Fix disable pause loop exit/pause filtering capability on SVM KVM: LAPIC: Prevent setting the tscdeadline timer if the lapic is hw disabled KVM: arm64: Don't inherit exec permission across page-table levels KVM: arm64: Prevent vcpu_has_ptrauth from generating OOL functions KVM: nVMX: check for invalid hdr.vmx.flags KVM: nVMX: check for required but missing VMCS12 in KVM_SET_NESTED_STATE selftests: kvm: do not set guest mode flag
2020-07-31Merge tag 'powerpc-5.8-8' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fix from Michael Ellerman: "Fix a bug introduced by the changes we made to lockless page table walking this cycle. When using the hash MMU, and perf with callchain recording, we can deadlock if the PMI interrupts a hash fault, and the callchain recording then takes a hash fault on the same page. Thanks to Nicholas Piggin, Aneesh Kumar K.V, Anton Blanchard, and Athira Rajeev" * tag 'powerpc-5.8-8' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/64s/hash: Fix hash_preload running with interrupts enabled
2020-07-31Merge tag 'arm64-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Will Deacon: "The main one is to fix the build after Willy's per-cpu entropy changes this week. Although that was already resolved elsewhere, the arm64 fix here is useful cleanup anyway. Other than that, we've got a fix for building with Clang's integrated assembler and a fix to make our IPv4 checksumming robust against invalid header lengths (this only seems to be triggerable by injected errors). - Fix build breakage due to circular headers - Fix build regression when using Clang's integrated assembler - Fix IPv4 header checksum code to deal with invalid length field - Fix broken path for Arm PMU entry in MAINTAINERS" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: MAINTAINERS: Include drivers subdirs for ARM PMU PROFILING AND DEBUGGING entry arm64: csum: Fix handling of bad packets arm64: Drop unnecessary include from asm/smp.h arm64/alternatives: move length validation inside the subsection
2020-07-31Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-armLinus Torvalds
Pull ARM fixes from Russell King: - avoid invoking overflow handler for uaccess watchpoints - fix incorrect clock_gettime64 availability - fix EFI crash in create_mapping_late() * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: 8988/1: mmu: fix crash in EFI calls due to p4d typo in create_mapping_late() ARM: 8987/1: VDSO: Fix incorrect clock_gettime64 ARM: 8986/1: hw_breakpoint: Don't invoke overflow handler on uaccess watchpoints
2020-07-31KVM: SVM: Fix disable pause loop exit/pause filtering capability on SVMWanpeng Li
'Commit 8566ac8b8e7c ("KVM: SVM: Implement pause loop exit logic in SVM")' drops disable pause loop exit/pause filtering capability completely, I guess it is a merge fault by Radim since disable vmexits capabilities and pause loop exit for SVM patchsets are merged at the same time. This patch reintroduces the disable pause loop exit/pause filtering capability support. Reported-by: Haiwei Li <lihaiwei@tencent.com> Tested-by: Haiwei Li <lihaiwei@tencent.com> Fixes: 8566ac8b ("KVM: SVM: Implement pause loop exit logic in SVM") Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Message-Id: <1596165141-28874-3-git-send-email-wanpengli@tencent.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-07-31KVM: LAPIC: Prevent setting the tscdeadline timer if the lapic is hw disabledWanpeng Li
Prevent setting the tscdeadline timer if the lapic is hw disabled. Fixes: bce87cce88 (KVM: x86: consolidate different ways to test for in-kernel LAPIC) Cc: <stable@vger.kernel.org> Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Message-Id: <1596165141-28874-1-git-send-email-wanpengli@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-07-30Merge tag 'kvmarm-fixes-5.8-4' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master KVM/arm64 fixes for Linux 5.8, take #3 - Fix a corner case of a new mapping inheriting exec permission without and yet bypassing invalidation of the I-cache - Make sure PtrAuth predicates oinly generate inline code for the non-VHE hypervisor code
2020-07-30ARM: percpu.h: fix build errorGrygorii Strashko
Fix build error for the case: defined(CONFIG_SMP) && !defined(CONFIG_CPU_V6) config: keystone_defconfig CC arch/arm/kernel/signal.o In file included from ../include/linux/random.h:14, from ../arch/arm/kernel/signal.c:8: ../arch/arm/include/asm/percpu.h: In function ‘__my_cpu_offset’: ../arch/arm/include/asm/percpu.h:29:34: error: ‘current_stack_pointer’ undeclared (first use in this function); did you mean ‘user_stack_pointer’? : "Q" (*(const unsigned long *)current_stack_pointer)); ^~~~~~~~~~~~~~~~~~~~~ user_stack_pointer Fixes: f227e3ec3b5c ("random32: update the net random state on interrupt and activity") Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-07-30arm64: csum: Fix handling of bad packetsRobin Murphy
Although iph is expected to point to at least 20 bytes of valid memory, ihl may be bogus, for example on reception of a corrupt packet. If it happens to be less than 5, we really don't want to run away and dereference 16GB worth of memory until it wraps back to exactly zero... Fixes: 0e455d8e80aa ("arm64: Implement optimised IP checksum helpers") Reported-by: guodeqing <geffrey.guo@huawei.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Will Deacon <will@kernel.org>
2020-07-30arm64: Drop unnecessary include from asm/smp.hMarc Zyngier
asm/pointer_auth.h is not needed anymore in asm/smp.h, as 62a679cb2825 ("arm64: simplify ptrauth initialization") removed the keys from the secondary_data structure. This also cures a compilation issue introduced by f227e3ec3b5c ("random32: update the net random state on interrupt and activity"). Fixes: 62a679cb2825 ("arm64: simplify ptrauth initialization") Fixes: f227e3ec3b5c ("random32: update the net random state on interrupt and activity") Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Will Deacon <will@kernel.org>
2020-07-30arm64/alternatives: move length validation inside the subsectionSami Tolvanen
Commit f7b93d42945c ("arm64/alternatives: use subsections for replacement sequences") breaks LLVM's integrated assembler, because due to its one-pass design, it cannot compute instruction sequence lengths before the layout for the subsection has been finalized. This change fixes the build by moving the .org directives inside the subsection, so they are processed after the subsection layout is known. Fixes: f7b93d42945c ("arm64/alternatives: use subsections for replacement sequences") Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Link: https://github.com/ClangBuiltLinux/linux/issues/1078 Link: https://lore.kernel.org/r/20200730153701.3892953-1-samitolvanen@google.com Signed-off-by: Will Deacon <will@kernel.org>
2020-07-29x86/i8259: Use printk_deferred() to prevent deadlockThomas Gleixner
0day reported a possible circular locking dependency: Chain exists of: &irq_desc_lock_class --> console_owner --> &port_lock_key Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&port_lock_key); lock(console_owner); lock(&port_lock_key); lock(&irq_desc_lock_class); The reason for this is a printk() in the i8259 interrupt chip driver which is invoked with the irq descriptor lock held, which reverses the lock operations vs. printk() from arbitrary contexts. Switch the printk() to printk_deferred() to avoid that. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/87365abt2v.fsf@nanos.tec.linutronix.de
2020-07-28Merge tag 'arm-fixes-5.8-3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc into master Pull ARM SoC DT fixes from Arnd Bergmann: "These are the latest device tree fixes for Arm SoCs: - TI Keystone2 ethernet regressed after a driver change broke with incorrect phy-mode in a board's DT source. - A similar fix is needed for two i.MX boards that were missed in an earlier bugfix. - DT change for Armada 38x allowing to add the register needed to fix NETA lockup when repeatedly switching speed. - One fix on imx6qdl-icore pin muxing to get USB OTG_ID and SD card detect work correctly. - Two fixes for the Allwinner SoCs, one to relax the CMA allocation ranges that were failing on older SoCs and one to fix Cedrus on the H6" * tag 'arm-fixes-5.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: ARM: dts: keystone-k2g-evm: fix rgmii phy-mode for ksz9031 phy ARM: dts: armada-38x: fix NETA lockup when repeatedly switching speeds ARM: dts: imx6qdl-icore: Fix OTG_ID pin and sdcard detect ARM: dts: imx6sx-sabreauto: Fix the phy-mode on fec2 ARM: dts: imx6sx-sdb: Fix the phy-mode on fec2 arm64: dts: allwinner: h6: Fix Cedrus IOMMU usage ARM: dts sunxi: Relax a bit the CMA pool allocation range
2020-07-28KVM: arm64: Don't inherit exec permission across page-table levelsWill Deacon
If a stage-2 page-table contains an executable, read-only mapping at the pte level (e.g. due to dirty logging being enabled), a subsequent write fault to the same page which tries to install a larger block mapping (e.g. due to dirty logging having been disabled) will erroneously inherit the exec permission and consequently skip I-cache invalidation for the rest of the block. Ensure that exec permission is only inherited by write faults when the new mapping is of the same size as the existing one. A subsequent instruction abort will result in I-cache invalidation for the entire block mapping. Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Marc Zyngier <maz@kernel.org> Tested-by: Quentin Perret <qperret@google.com> Reviewed-by: Quentin Perret <qperret@google.com> Cc: Marc Zyngier <maz@kernel.org> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20200723101714.15873-1-will@kernel.org
2020-07-28KVM: arm64: Prevent vcpu_has_ptrauth from generating OOL functionsMarc Zyngier
So far, vcpu_has_ptrauth() is implemented in terms of system_supports_*_auth() calls, which are declared "inline". In some specific conditions (clang and SCS), the "inline" very much turns into an "out of line", which leads to a fireworks when this predicate is evaluated on a non-VHE system (right at the beginning of __hyp_handle_ptrauth). Instead, make sure vcpu_has_ptrauth gets expanded inline by directly using the cpus_have_final_cap() helpers, which are __always_inline, generate much better code, and are the only thing that make sense when running at EL2 on a nVHE system. Fixes: 29eb5a3c57f7 ("KVM: arm64: Handle PtrAuth traps early") Reported-by: Nathan Chancellor <natechancellor@gmail.com> Reported-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Link: https://lore.kernel.org/r/20200722162231.3689767-1-maz@kernel.org
2020-07-27sh: Fix validation of system call numberMichael Karcher
The slow path for traced system call entries accessed a wrong memory location to get the number of the maximum allowed system call number. Renumber the numbered "local" label for the correct location to avoid collisions with actual local labels. Signed-off-by: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de> Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Fixes: f3a8308864f920d2 ("sh: Add a few missing irqflags tracing markers.") Signed-off-by: Rich Felker <dalias@libc.org>
2020-07-27sh/tlb: Fix PGTABLE_LEVELS > 2Peter Zijlstra
Geert reported that his SH7722-based Migo-R board failed to boot after commit: c5b27a889da9 ("sh/tlb: Convert SH to generic mmu_gather") That commit fell victim to copying the wrong pattern -- __pmd_free_tlb() used to be implemented with pmd_free(). Fixes: c5b27a889da9 ("sh/tlb: Convert SH to generic mmu_gather") Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rich Felker <dalias@libc.org>
2020-07-27KVM: nVMX: check for invalid hdr.vmx.flagsPaolo Bonzini
hdr.vmx.flags is meant for future extensions to the ABI, rejecting invalid flags is necessary to avoid broken half-loads of the nVMX state. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-07-27KVM: nVMX: check for required but missing VMCS12 in KVM_SET_NESTED_STATEPaolo Bonzini
A missing VMCS12 was not causing -EINVAL (it was just read with copy_from_user, so it is not a security issue, but it is still wrong). Test for VMCS12 validity and reject the nested state if a VMCS12 is required but not present. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-07-27powerpc/64s/hash: Fix hash_preload running with interrupts enabledNicholas Piggin
Commit 2f92447f9f96 ("powerpc/book3s64/hash: Use the pte_t address from the caller") removed the local_irq_disable from hash_preload, but it was required for more than just the page table walk: the hash pte busy bit is effectively a lock which may be taken in interrupt context, and the local update flag test must not be preempted before it's used. This solves apparent lockups with perf interrupting __hash_page_64K. If get_perf_callchain then also takes a hash fault on the same page while it is already locked, it will loop forever taking hash faults, which looks like this: cpu 0x49e: Vector: 100 (System Reset) at [c00000001a4f7d70] pc: c000000000072dc8: hash_page_mm+0x8/0x800 lr: c00000000000c5a4: do_hash_page+0x24/0x38 sp: c0002ac1cc69ac70 msr: 8000000000081033 current = 0xc0002ac1cc602e00 paca = 0xc00000001de1f280 irqmask: 0x03 irq_happened: 0x01 pid = 20118, comm = pread2_processe Linux version 5.8.0-rc6-00345-g1fad14f18bc6 49e:mon> t [c0002ac1cc69ac70] c00000000000c5a4 do_hash_page+0x24/0x38 (unreliable) --- Exception: 300 (Data Access) at c00000000008fa60 __copy_tofrom_user_power7+0x20c/0x7ac [link register ] c000000000335d10 copy_from_user_nofault+0xf0/0x150 [c0002ac1cc69af70] c00032bf9fa3c880 (unreliable) [c0002ac1cc69afa0] c000000000109df0 read_user_stack_64+0x70/0xf0 [c0002ac1cc69afd0] c000000000109fcc perf_callchain_user_64+0x15c/0x410 [c0002ac1cc69b060] c000000000109c00 perf_callchain_user+0x20/0x40 [c0002ac1cc69b080] c00000000031c6cc get_perf_callchain+0x25c/0x360 [c0002ac1cc69b120] c000000000316b50 perf_callchain+0x70/0xa0 [c0002ac1cc69b140] c000000000316ddc perf_prepare_sample+0x25c/0x790 [c0002ac1cc69b1a0] c000000000317350 perf_event_output_forward+0x40/0xb0 [c0002ac1cc69b220] c000000000306138 __perf_event_overflow+0x88/0x1a0 [c0002ac1cc69b270] c00000000010cf70 record_and_restart+0x230/0x750 [c0002ac1cc69b620] c00000000010d69c perf_event_interrupt+0x20c/0x510 [c0002ac1cc69b730] c000000000027d9c performance_monitor_exception+0x4c/0x60 [c0002ac1cc69b750] c00000000000b2f8 performance_monitor_common_virt+0x1b8/0x1c0 --- Exception: f00 (Performance Monitor) at c0000000000cb5b0 pSeries_lpar_hpte_insert+0x0/0x160 [link register ] c0000000000846f0 __hash_page_64K+0x210/0x540 [c0002ac1cc69ba50] 0000000000000000 (unreliable) [c0002ac1cc69bb00] c000000000073ae0 update_mmu_cache+0x390/0x3a0 [c0002ac1cc69bb70] c00000000037f024 wp_page_copy+0x364/0xce0 [c0002ac1cc69bc20] c00000000038272c do_wp_page+0xdc/0xa60 [c0002ac1cc69bc70] c0000000003857bc handle_mm_fault+0xb9c/0x1b60 [c0002ac1cc69bd50] c00000000006c434 __do_page_fault+0x314/0xc90 [c0002ac1cc69be20] c00000000000c5c8 handle_page_fault+0x10/0x2c --- Exception: 300 (Data Access) at 00007fff8c861fe8 SP (7ffff6b19660) is in userspace Fixes: 2f92447f9f96 ("powerpc/book3s64/hash: Use the pte_t address from the caller") Reported-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Reported-by: Anton Blanchard <anton@ozlabs.org> Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200727060947.10060-1-npiggin@gmail.com
2020-07-26Merge branch 'parisc-5.8-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux into master Pull parisc fixes from Helge Deller: "Two fixes: - Add the cmpxchg() function for pointers to u8 values. This fixes a kernel linking error when building the tusb1210 driver (from Liam Beguin). - Add a define for atomic64_set_release() to fix CPU soft lockups which happen because of missing unlocks while processing bit operations (from John David Anglin)" * 'parisc-5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Add atomic64_set_release() define to avoid CPU soft lockups parisc: add support for cmpxchg on u8 pointers
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-07 00:11:47 +0000