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98a96f2022
98471 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Linus Torvalds
|
98a96f2022 |
Merge branch 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 vdso updates from Ingo Molnar: "Further simplifications and improvements to the VDSO code, by Andy Lutomirski" * 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86_64/vsyscall: Fix warn_bad_vsyscall log output x86/vdso: Set VM_MAYREAD for the vvar vma x86, vdso: Get rid of the fake section mechanism x86, vdso: Move the vvar area before the vdso text |
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Linus Torvalds
|
5637a2a3e9 |
Merge branch 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 UV TLB update from Ingo Molnar: "UV TLB shootdown logic updates for version of the UV architecture" * 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/uv: Update the UV3 TLB shootdown logic |
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Linus Torvalds
|
d782cebd6b |
Merge branch 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RAS updates from Ingo Molnar:
"The main changes in this cycle are:
- RAS tracing/events infrastructure, by Gong Chen.
- Various generalizations of the APEI code to make it available to
non-x86 architectures, by Tomasz Nowicki"
* 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/ras: Fix build warnings in <linux/aer.h>
acpi, apei, ghes: Factor out ioremap virtual memory for IRQ and NMI context.
acpi, apei, ghes: Make NMI error notification to be GHES architecture extension.
apei, mce: Factor out APEI architecture specific MCE calls.
RAS, extlog: Adjust init flow
trace, eMCA: Add a knob to adjust where to save event log
trace, RAS: Add eMCA trace event interface
RAS, debugfs: Add debugfs interface for RAS subsystem
CPER: Adjust code flow of some functions
x86, MCE: Robustify mcheck_init_device
trace, AER: Move trace into unified interface
trace, RAS: Add basic RAS trace event
x86, MCE: Kill CPU_POST_DEAD
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Linus Torvalds
|
8556d44fee |
Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 platform updates from Ingo Molnar: "The main changes in this cycle are: - Intel SOC driver updates, by Aubrey Li. - TS5500 platform updates, by Vivien Didelot" * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/pmc_atom: Silence shift wrapping warnings in pmc_sleep_tmr_show() x86/pmc_atom: Expose PMC device state and platform sleep state x86/pmc_atom: Eisable a few S0ix wake up events for S0ix residency x86/platform: New Intel Atom SOC power management controller driver x86/platform/ts5500: Add support for TS-5400 boards x86/platform/ts5500: Add a 'name' sysfs attribute x86/platform/ts5500: Use the DEVICE_ATTR_RO() macro |
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Linus Torvalds
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ce47479632 |
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 mm changes from Ingo Molnar: "The main change in this cycle is the rework of the TLB range flushing code, to simplify, fix and consolidate the code. By Dave Hansen" * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm: Set TLB flush tunable to sane value (33) x86/mm: New tunable for single vs full TLB flush x86/mm: Add tracepoints for TLB flushes x86/mm: Unify remote INVLPG code x86/mm: Fix missed global TLB flush stat x86/mm: Rip out complicated, out-of-date, buggy TLB flushing x86/mm: Clean up the TLB flushing code x86/smep: Be more informative when signalling an SMEP fault |
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Linus Torvalds
|
76f09aa464 |
Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI changes from Ingo Molnar:
"Main changes in this cycle are:
- arm64 efi stub fixes, preservation of FP/SIMD registers across
firmware calls, and conversion of the EFI stub code into a static
library - Ard Biesheuvel
- Xen EFI support - Daniel Kiper
- Support for autoloading the efivars driver - Lee, Chun-Yi
- Use the PE/COFF headers in the x86 EFI boot stub to request that
the stub be loaded with CONFIG_PHYSICAL_ALIGN alignment - Michael
Brown
- Consolidate all the x86 EFI quirks into one file - Saurabh Tangri
- Additional error logging in x86 EFI boot stub - Ulf Winkelvos
- Support loading initrd above 4G in EFI boot stub - Yinghai Lu
- EFI reboot patches for ACPI hardware reduced platforms"
* 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits)
efi/arm64: Handle missing virtual mapping for UEFI System Table
arch/x86/xen: Silence compiler warnings
xen: Silence compiler warnings
x86/efi: Request desired alignment via the PE/COFF headers
x86/efi: Add better error logging to EFI boot stub
efi: Autoload efivars
efi: Update stale locking comment for struct efivars
arch/x86: Remove efi_set_rtc_mmss()
arch/x86: Replace plain strings with constants
xen: Put EFI machinery in place
xen: Define EFI related stuff
arch/x86: Remove redundant set_bit(EFI_MEMMAP) call
arch/x86: Remove redundant set_bit(EFI_SYSTEM_TABLES) call
efi: Introduce EFI_PARAVIRT flag
arch/x86: Do not access EFI memory map if it is not available
efi: Use early_mem*() instead of early_io*()
arch/ia64: Define early_memunmap()
x86/reboot: Add EFI reboot quirk for ACPI Hardware Reduced flag
efi/reboot: Allow powering off machines using EFI
efi/reboot: Add generic wrapper around EfiResetSystem()
...
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Linus Torvalds
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e9c9eecaba |
Merge branch 'x86-cpufeature-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cpufeature updates from Ingo Molnar:
"The main changes in this cycle were:
- Continued cleanups of CPU bugs mis-marked as 'missing features', by
Borislav Petkov.
- Detect the xsaves/xrstors feature and releated cleanup, by Fenghua
Yu"
* 'x86-cpufeature-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, cpu: Kill cpu_has_mp
x86, amd: Cleanup init_amd
x86/cpufeature: Add bug flags to /proc/cpuinfo
x86, cpufeature: Convert more "features" to bugs
x86/xsaves: Detect xsaves/xrstors feature
x86/cpufeature.h: Reformat x86 feature macros
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Linus Torvalds
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19d402c1e7 |
Merge branches 'x86-build-for-linus', 'x86-cleanups-for-linus' and 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 build/cleanup/debug updates from Ingo Molnar: "Robustify the build process with a quirk to avoid GCC reordering related bugs. Two code cleanups. Simplify entry_64.S CFI annotations, by Jan Beulich" * 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, build: Change code16gcc.h from a C header to an assembly header * 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86: Simplify __HAVE_ARCH_CMPXCHG tests x86/tsc: Get rid of custom DIV_ROUND() macro * 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/debug: Drop several unnecessary CFI annotations |
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Linus Torvalds
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ef35ad26f8 |
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf changes from Ingo Molnar:
"Kernel side changes:
- Consolidate the PMU interrupt-disabled code amongst architectures
(Vince Weaver)
- misc fixes
Tooling changes (new features, user visible changes):
- Add support for pagefault tracing in 'trace', please see multiple
examples in the changeset messages (Stanislav Fomichev).
- Add pagefault statistics in 'trace' (Stanislav Fomichev)
- Add header for columns in 'top' and 'report' TUI browsers (Jiri
Olsa)
- Add pagefault statistics in 'trace' (Stanislav Fomichev)
- Add IO mode into timechart command (Stanislav Fomichev)
- Fallback to syscalls:* when raw_syscalls:* is not available in the
perl and python perf scripts. (Daniel Bristot de Oliveira)
- Add --repeat global option to 'perf bench' to be used in benchmarks
such as the existing 'futex' one, that was modified to use it
instead of a local option. (Davidlohr Bueso)
- Fix fd -> pathname resolution in 'trace', be it using /proc or a
vfs_getname probe point. (Arnaldo Carvalho de Melo)
- Add suggestion of how to set perf_event_paranoid sysctl, to help
non-root users trying tools like 'trace' to get a working
environment. (Arnaldo Carvalho de Melo)
- Updates from trace-cmd for traceevent plugin_kvm plus args cleanup
(Steven Rostedt, Jan Kiszka)
- Support S/390 in 'perf kvm stat' (Alexander Yarygin)
Tooling infrastructure changes:
- Allow reserving a row for header purposes in the hists browser
(Arnaldo Carvalho de Melo)
- Various fixes and prep work related to supporting Intel PT (Adrian
Hunter)
- Introduce multiple debug variables control (Jiri Olsa)
- Add callchain and additional sample information for python scripts
(Joseph Schuchart)
- More prep work to support Intel PT: (Adrian Hunter)
- Polishing 'script' BTS output
- 'inject' can specify --kallsym
- VDSO is per machine, not a global var
- Expose data addr lookup functions previously private to 'script'
- Large mmap fixes in events processing
- Include standard stringify macros in power pc code (Sukadev
Bhattiprolu)
Tooling cleanups:
- Convert open coded equivalents to asprintf() (Andy Shevchenko)
- Remove needless reassignments in 'trace' (Arnaldo Carvalho de Melo)
- Cache the is_exit syscall test in 'trace) (Arnaldo Carvalho de
Melo)
- No need to reimplement err() in 'perf bench sched-messaging', drop
barf(). (Davidlohr Bueso).
- Remove ev_name argument from perf_evsel__hists_browse, can be
obtained from the other parameters. (Jiri Olsa)
Tooling fixes:
- Fix memory leak in the 'sched-messaging' perf bench test.
(Davidlohr Bueso)
- The -o and -n 'perf bench mem' options are mutually exclusive, emit
error when both are specified. (Davidlohr Bueso)
- Fix scrollbar refresh row index in the ui browser, problem exposed
now that headers will be added and will be allowed to be switched
on/off. (Jiri Olsa)
- Handle the num array type in python properly (Sebastian Andrzej
Siewior)
- Fix wrong condition for allocation failure (Jiri Olsa)
- Adjust callchain based on DWARF debug info on powerpc (Sukadev
Bhattiprolu)
- Fix a risk for doing free on uninitialized pointer in traceevent
lib (Rickard Strandqvist)
- Update attr test with PERF_FLAG_FD_CLOEXEC flag (Jiri Olsa)
- Enable close-on-exec flag on perf file descriptor (Yann Droneaud)
- Fix build on gcc 4.4.7 (Arnaldo Carvalho de Melo)
- Event ordering fixes (Jiri Olsa)"
* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (123 commits)
Revert "perf tools: Fix jump label always changing during tracing"
perf tools: Fix perf usage string leftover
perf: Check permission only for parent tracepoint event
perf record: Store PERF_RECORD_FINISHED_ROUND only for nonempty rounds
perf record: Always force PERF_RECORD_FINISHED_ROUND event
perf inject: Add --kallsyms parameter
perf tools: Expose 'addr' functions so they can be reused
perf session: Fix accounting of ordered samples queue
perf powerpc: Include util/util.h and remove stringify macros
perf tools: Fix build on gcc 4.4.7
perf tools: Add thread parameter to vdso__dso_findnew()
perf tools: Add dso__type()
perf tools: Separate the VDSO map name from the VDSO dso name
perf tools: Add vdso__new()
perf machine: Fix the lifetime of the VDSO temporary file
perf tools: Group VDSO global variables into a structure
perf session: Add ability to skip 4GiB or more
perf session: Add ability to 'skip' a non-piped event stream
perf tools: Pass machine to vdso__dso_findnew()
perf tools: Add dso__data_size()
...
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Linus Torvalds
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8efb90cf1e |
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
"The main changes in this cycle are:
- big rtmutex and futex cleanup and robustification from Thomas
Gleixner
- mutex optimizations and refinements from Jason Low
- arch_mutex_cpu_relax() removal and related cleanups
- smaller lockdep tweaks"
* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
arch, locking: Ciao arch_mutex_cpu_relax()
locking/lockdep: Only ask for /proc/lock_stat output when available
locking/mutexes: Optimize mutex trylock slowpath
locking/mutexes: Try to acquire mutex only if it is unlocked
locking/mutexes: Delete the MUTEX_SHOW_NO_WAITER macro
locking/mutexes: Correct documentation on mutex optimistic spinning
rtmutex: Make the rtmutex tester depend on BROKEN
futex: Simplify futex_lock_pi_atomic() and make it more robust
futex: Split out the first waiter attachment from lookup_pi_state()
futex: Split out the waiter check from lookup_pi_state()
futex: Use futex_top_waiter() in lookup_pi_state()
futex: Make unlock_pi more robust
rtmutex: Avoid pointless requeueing in the deadlock detection chain walk
rtmutex: Cleanup deadlock detector debug logic
rtmutex: Confine deadlock logic to futex
rtmutex: Simplify remove_waiter()
rtmutex: Document pi chain walk
rtmutex: Clarify the boost/deboost part
rtmutex: No need to keep task ref for lock owner check
rtmutex: Simplify and document try_to_take_rtmutex()
...
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Linus Torvalds
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a45c657f28 |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
Pull m68k changes from Geert Uytterhoeven: "Extremely non-spectacular changes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k/sun3: Remove define statement no longer needed zorro: Use ARRAY_SIZE |
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Linus Torvalds
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489f50be56 |
Miscellaneous ia64 specific cleanup
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Linus Torvalds
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5167d09ffa |
arm64 updates for 3.17
Changes include:
- Context tracking support (NO_HZ_FULL) which narrowly missed 3.16
- vDSO layout rework following Andy's work on x86
- TEXT_OFFSET fuzzing for bootloader testing
- /proc/cpuinfo tidy-up
- Preliminary work to support 48-bit virtual addresses, but this is
currently disabled until KVM has been ported to use it (the patches
do, however, bring some nice clean-up)
- Boot-time CPU sanity checks (especially useful on heterogenous
systems)
- Support for syscall auditing
- Support for CC_STACKPROTECTOR
- defconfig updates
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon:
"Once again, Catalin's off on holiday and I'm looking after the arm64
tree. Please can you pull the following arm64 updates for 3.17?
Note that this branch also includes the new GICv3 driver (merged via a
stable tag from Jason's irqchip tree), since there is a fix for older
binutils on top.
Changes include:
- context tracking support (NO_HZ_FULL) which narrowly missed 3.16
- vDSO layout rework following Andy's work on x86
- TEXT_OFFSET fuzzing for bootloader testing
- /proc/cpuinfo tidy-up
- preliminary work to support 48-bit virtual addresses, but this is
currently disabled until KVM has been ported to use it (the patches
do, however, bring some nice clean-up)
- boot-time CPU sanity checks (especially useful on heterogenous
systems)
- support for syscall auditing
- support for CC_STACKPROTECTOR
- defconfig updates"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (55 commits)
arm64: add newline to I-cache policy string
Revert "arm64: dmi: Add SMBIOS/DMI support"
arm64: fpsimd: fix a typo in fpsimd_save_partial_state ENDPROC
arm64: don't call break hooks for BRK exceptions from EL0
arm64: defconfig: enable devtmpfs mount option
arm64: vdso: fix build error when switching from LE to BE
arm64: defconfig: add virtio support for running as a kvm guest
arm64: gicv3: Allow GICv3 compilation with older binutils
arm64: fix soft lockup due to large tlb flush range
arm64/crypto: fix makefile rule for aes-glue-%.o
arm64: Do not invoke audit_syscall_* functions if !CONFIG_AUDIT_SYSCALL
arm64: Fix barriers used for page table modifications
arm64: Add support for 48-bit VA space with 64KB page configuration
arm64: asm/pgtable.h pmd/pud definitions clean-up
arm64: Determine the vmalloc/vmemmap space at build time based on VA_BITS
arm64: Clean up the initial page table creation in head.S
arm64: Remove asm/pgtable-*level-types.h files
arm64: Remove asm/pgtable-*level-hwdef.h files
arm64: Convert bool ARM64_x_LEVELS to int ARM64_PGTABLE_LEVELS
arm64: mm: Implement 4 levels of translation tables
...
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Linus Torvalds
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8533ce7271 |
These are the x86, MIPS and s390 changes; PPC and ARM will come in a
few days. MIPS and s390 have little going on this release; just bugfixes, some small, some larger. The highlights for x86 are nested VMX improvements (Jan Kiszka), optimizations for old processor (up to Nehalem, by me and Bandan Das), and a lot of x86 emulator bugfixes (Nadav Amit). Stephen Rothwell reported a trivial conflict with the tracing branch. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABAgAGBQJT300XAAoJEBvWZb6bTYby3V8QAJz+XyajnhJ8wH55Vxczz22L i2gtUGmBLhEXsBcaVKO4BBfek88lLzg0SGLjfW5wCMQmKtxVlrwTCXNkBoPGjapd NwHtWkMKym44PDhRovn7zkSumkxC43uFIBR/ebrhP6Bvhh9s+MnkQUxfw9ILB+YV EeKyEG8sSgxFCciuHbp3mIXpDcO6r/ldy6I7009OdyhLoMY+Kvmk7kRe9wtAivdg CGJi60QvGOn2RGRPOCEtF6UWr8Ae8fe1t84o0hkXPv/j3jtabzAatXKJa4dYNbIs 7Mp4NQpxaGV6rq3WCYVeZRxGs+UReGDAS3Il4Z8C9eTOTooSfxdVr8acpM8PY6I8 UmLT6ECLGycc4ELXrETtR+QLmiXACyJqyVxz4aiLV3kWSWfamKD3hBeQK9NizNcE VoPDl+PyISvR1tW4KstBuzfUWAEXi+gO78cqqFr/VW6cl7HKpA1DFQaPfGkYKDae 2CPwcLwI5/M6RtSgkyXTkEqNZLc2BjldqSeM1lmWjhZVW56X2iqePUL46Vab3Yvt U+sELtwEE560NLN3hbaHUsLR1tcUix5w8vTzcXPxgoHQBszHCcAZTWd1XHulr64F rp/cangqtkPKcu5j1mNhQs38oLjHI1MUsbQrqFoD4tmHjQ75iXHRFzYGoIVKXyHG AnGbQzJzBcdAANhm3LW0 =UXxV -----END PGP SIGNATURE----- Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm Pull KVM changes from Paolo Bonzini: "These are the x86, MIPS and s390 changes; PPC and ARM will come in a few days. MIPS and s390 have little going on this release; just bugfixes, some small, some larger. The highlights for x86 are nested VMX improvements (Jan Kiszka), optimizations for old processor (up to Nehalem, by me and Bandan Das), and a lot of x86 emulator bugfixes (Nadav Amit). Stephen Rothwell reported a trivial conflict with the tracing branch" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (104 commits) x86/kvm: Resolve shadow warnings in macro expansion KVM: s390: rework broken SIGP STOP interrupt handling KVM: x86: always exit on EOIs for interrupts listed in the IOAPIC redir table KVM: vmx: remove duplicate vmx_mpx_supported() prototype KVM: s390: Fix memory leak on busy SIGP stop x86/kvm: Resolve shadow warning from min macro kvm: Resolve missing-field-initializers warnings Replace NR_VMX_MSR with its definition KVM: x86: Assertions to check no overrun in MSR lists KVM: x86: set rflags.rf during fault injection KVM: x86: Setting rflags.rf during rep-string emulation KVM: x86: DR6/7.RTM cannot be written KVM: nVMX: clean up nested_release_vmcs12 and code around it KVM: nVMX: fix lifetime issues for vmcs02 KVM: x86: Defining missing x86 vectors KVM: x86: emulator injects #DB when RFLAGS.RF is set KVM: x86: Cleanup of rflags.rf cleaning KVM: x86: Clear rflags.rf on emulated instructions KVM: x86: popf emulation should not change RF KVM: x86: Clearing rflags.rf upon skipped emulated instruction ... |
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Linus Torvalds
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b8c0aa46b3 |
This pull request has a lot of work done. The main thing is the changes
to the ftrace function callback infrastructure. It's introducing a way to allow different functions to call directly different trampolines instead of all calling the same "mcount" one. The only user of this for now is the function graph tracer, which always had a different trampoline, but the function tracer trampoline was called and did basically nothing, and then the function graph tracer trampoline was called. The difference now, is that the function graph tracer trampoline can be called directly if a function is only being traced by the function graph trampoline. If function tracing is also happening on the same function, the old way is still done. The accounting for this takes up more memory when function graph tracing is activated, as it needs to keep track of which functions it uses. I have a new way that wont take as much memory, but it's not ready yet for this merge window, and will have to wait for the next one. Another big change was the removal of the ftrace_start/stop() calls that were used by the suspend/resume code that stopped function tracing when entering into suspend and resume paths. The stop of ftrace was done because there was some function that would crash the system if one called smp_processor_id()! The stop/start was a big hammer to solve the issue at the time, which was when ftrace was first introduced into Linux. Now ftrace has better infrastructure to debug such issues, and I found the problem function and labeled it with "notrace" and function tracing can now safely be activated all the way down into the guts of suspend and resume. Other changes include clean ups of uprobe code. Clean up of the trace_seq() code. And other various small fixes and clean ups to ftrace and tracing. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAABAgAGBQJT35zXAAoJEKQekfcNnQGuOz0H/38zqM0nLFhrgvz3EPk2UOjn xqpX8qyb2V7TJZL+IqeXU2a5cQZl5ba0D4WtBGpxbTae3CJYiuQ87iKUNFoH0om5 FDpn80igb368k8V3qRdRsziKVCCf0XBd/NkHJXc0ZkfXGyzB2Ga4bBxALxp2gj9y bnO+vKo6+tWYKG4hyQb4P3LRXUrK8/LWEsPr39cH2QH1Rdj69Lx9CgrCdUVJmwcb Bj8hEiLXL/RYCFNn79A3wNTUvW0rG/AOIf4SLqXtasSRZ0ToaU0ZyDnrNv+0Ol47 rX8tSk+LfXchL9hpIvjCf1vlAYq3pO02favteR/jip3lx/dTjEDE4RJ9qtJzZ4Q= =fwQY -----END PGP SIGNATURE----- Merge tag 'trace-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing updates from Steven Rostedt: "This pull request has a lot of work done. The main thing is the changes to the ftrace function callback infrastructure. It's introducing a way to allow different functions to call directly different trampolines instead of all calling the same "mcount" one. The only user of this for now is the function graph tracer, which always had a different trampoline, but the function tracer trampoline was called and did basically nothing, and then the function graph tracer trampoline was called. The difference now, is that the function graph tracer trampoline can be called directly if a function is only being traced by the function graph trampoline. If function tracing is also happening on the same function, the old way is still done. The accounting for this takes up more memory when function graph tracing is activated, as it needs to keep track of which functions it uses. I have a new way that wont take as much memory, but it's not ready yet for this merge window, and will have to wait for the next one. Another big change was the removal of the ftrace_start/stop() calls that were used by the suspend/resume code that stopped function tracing when entering into suspend and resume paths. The stop of ftrace was done because there was some function that would crash the system if one called smp_processor_id()! The stop/start was a big hammer to solve the issue at the time, which was when ftrace was first introduced into Linux. Now ftrace has better infrastructure to debug such issues, and I found the problem function and labeled it with "notrace" and function tracing can now safely be activated all the way down into the guts of suspend and resume Other changes include clean ups of uprobe code, clean up of the trace_seq() code, and other various small fixes and clean ups to ftrace and tracing" * tag 'trace-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (57 commits) ftrace: Add warning if tramp hash does not match nr_trampolines ftrace: Fix trampoline hash update check on rec->flags ring-buffer: Use rb_page_size() instead of open coded head_page size ftrace: Rename ftrace_ops field from trampolines to nr_trampolines tracing: Convert local function_graph functions to static ftrace: Do not copy old hash when resetting tracing: let user specify tracing_thresh after selecting function_graph ring-buffer: Always run per-cpu ring buffer resize with schedule_work_on() tracing: Remove function_trace_stop and HAVE_FUNCTION_TRACE_MCOUNT_TEST s390/ftrace: remove check of obsolete variable function_trace_stop arm64, ftrace: Remove check of obsolete variable function_trace_stop Blackfin: ftrace: Remove check of obsolete variable function_trace_stop metag: ftrace: Remove check of obsolete variable function_trace_stop microblaze: ftrace: Remove check of obsolete variable function_trace_stop MIPS: ftrace: Remove check of obsolete variable function_trace_stop parisc: ftrace: Remove check of obsolete variable function_trace_stop sh: ftrace: Remove check of obsolete variable function_trace_stop sparc64,ftrace: Remove check of obsolete variable function_trace_stop tile: ftrace: Remove check of obsolete variable function_trace_stop ftrace: x86: Remove check of obsolete variable function_trace_stop ... |
||
|
Linus Torvalds
|
e4ca4308c0 |
The clock framework changes for 3.17 are mostly additions of new clock
drivers and fixes/enhancements to existing clock drivers. There are also
some non-critical fixes and improvements to the framework core.
Changes to the clock framework core include:
* improvements to printks on errors
* flattening the previously hierarchal structure of per-clock entries
in debugfs
* allow per-clock debugfs entries that are specific to a particular
clock driver
* configure initial clock parent and/or initial clock rate from Device
Tree
* several feature enhancements to the composite clock type
* misc fixes
New clock drivers added include:
* TI Palmas PMIC
* Allwinner A23 SoC
* Qualcomm APQ8084 and IPQ8064 SoCs
* Rockchip rk3188, rk3066 and rk3288 SoCs
* STMicroelectronics STiH407 SoC
* Cirrus Logic CLPS711X SoC
Many fixes, feature enhancements and further clock tree support for
existing clock drivers also were merged, such as Samsung's "ARMCLK down"
power saving feature for their Exynos4 & Exynos5 SoCs.
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Merge tag 'clk-for-linus-3.17' of git://git.linaro.org/people/mike.turquette/linux
Pull clock framework updates from Mike Turquette:
"The clock framework changes for 3.17 are mostly additions of new clock
drivers and fixes/enhancements to existing clock drivers. There are
also some non-critical fixes and improvements to the framework core.
Changes to the clock framework core include:
- improvements to printks on errors
- flattening the previously hierarchal structure of per-clock entries
in debugfs
- allow per-clock debugfs entries that are specific to a particular
clock driver
- configure initial clock parent and/or initial clock rate from
Device Tree
- several feature enhancements to the composite clock type
- misc fixes
New clock drivers added include:
- TI Palmas PMIC
- Allwinner A23 SoC
- Qualcomm APQ8084 and IPQ8064 SoCs
- Rockchip rk3188, rk3066 and rk3288 SoCs
- STMicroelectronics STiH407 SoC
- Cirrus Logic CLPS711X SoC
Many fixes, feature enhancements and further clock tree support for
existing clock drivers also were merged, such as Samsung's "ARMCLK
down" power saving feature for their Exynos4 & Exynos5 SoCs"
* tag 'clk-for-linus-3.17' of git://git.linaro.org/people/mike.turquette/linux: (86 commits)
clk: Add missing of_clk_set_defaults export
clk: checking wrong variable in __set_clk_parents()
clk: Propagate any error return from debug_init()
clk: clps711x: Add DT bindings documentation
clk: Add CLPS711X clk driver
clk: st: Use round to closest divider flag
clk: st: Update frequency tables for fs660c32 and fs432c65
clk: st: STiH407: Support for clockgenA9
clk: st: STiH407: Support for clockgenD0/D2/D3
clk: st: STiH407: Support for clockgenC0
clk: st: Add quadfs reset handling
clk: st: Add polarity bit indication
clk: st: STiH407: Support for clockgenA0
clk: st: STiH407: Support for A9 MUX Clocks
clk: st: STiH407: Support for Flexgen Clocks
clk: st: Adds Flexgen clock binding
clk: st: Remove uncessary (void *) cast
clk: st: use static const for clkgen_pll_data tables
clk: st: use static const for stm_fs tables
clk: st: Update ST clock binding documentation
...
|
||
|
Linus Torvalds
|
f2a84170ed |
Merge branch 'for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
Pull percpu updates from Tejun Heo:
- Major reorganization of percpu header files which I think makes
things a lot more readable and logical than before.
- percpu-refcount is updated so that it requires explicit destruction
and can be reinitialized if necessary. This was pulled into the
block tree to replace the custom percpu refcnting implemented in
blk-mq.
- In the process, percpu and percpu-refcount got cleaned up a bit
* 'for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (21 commits)
percpu-refcount: implement percpu_ref_reinit() and percpu_ref_is_zero()
percpu-refcount: require percpu_ref to be exited explicitly
percpu-refcount: use unsigned long for pcpu_count pointer
percpu-refcount: add helpers for ->percpu_count accesses
percpu-refcount: one bit is enough for REF_STATUS
percpu-refcount, aio: use percpu_ref_cancel_init() in ioctx_alloc()
workqueue: stronger test in process_one_work()
workqueue: clear POOL_DISASSOCIATED in rebind_workers()
percpu: Use ALIGN macro instead of hand coding alignment calculation
percpu: invoke __verify_pcpu_ptr() from the generic part of accessors and operations
percpu: preffity percpu header files
percpu: use raw_cpu_*() to define __this_cpu_*()
percpu: reorder macros in percpu header files
percpu: move {raw|this}_cpu_*() definitions to include/linux/percpu-defs.h
percpu: move generic {raw|this}_cpu_*_N() definitions to include/asm-generic/percpu.h
percpu: only allow sized arch overrides for {raw|this}_cpu_*() ops
percpu: reorganize include/linux/percpu-defs.h
percpu: move accessors from include/linux/percpu.h to percpu-defs.h
percpu: include/asm-generic/percpu.h should contain only arch-overridable parts
percpu: introduce arch_raw_cpu_ptr()
...
|
||
|
Linus Torvalds
|
3e7a716a92 |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto update from Herbert Xu: - CTR(AES) optimisation on x86_64 using "by8" AVX. - arm64 support to ccp - Intel QAT crypto driver - Qualcomm crypto engine driver - x86-64 assembly optimisation for 3DES - CTR(3DES) speed test - move FIPS panic from module.c so that it only triggers on crypto modules - SP800-90A Deterministic Random Bit Generator (drbg). - more test vectors for ghash. - tweak self tests to catch partial block bugs. - misc fixes. * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (94 commits) crypto: drbg - fix failure of generating multiple of 2**16 bytes crypto: ccp - Do not sign extend input data to CCP crypto: testmgr - add missing spaces to drbg error strings crypto: atmel-tdes - Switch to managed version of kzalloc crypto: atmel-sha - Switch to managed version of kzalloc crypto: testmgr - use chunks smaller than algo block size in chunk tests crypto: qat - Fixed SKU1 dev issue crypto: qat - Use hweight for bit counting crypto: qat - Updated print outputs crypto: qat - change ae_num to ae_id crypto: qat - change slice->regions to slice->region crypto: qat - use min_t macro crypto: qat - remove unnecessary parentheses crypto: qat - remove unneeded header crypto: qat - checkpatch blank lines crypto: qat - remove unnecessary return codes crypto: Resolve shadow warnings crypto: ccp - Remove "select OF" from Kconfig crypto: caam - fix DECO RSR polling crypto: qce - Let 'DEV_QCE' depend on both HAS_DMA and HAS_IOMEM ... |
||
|
Linus Torvalds
|
f74ad8df4e |
PCI changes for the v3.17 merge window:
Resource management
- Support BAR sizes up to 128GB (Yinghai Lu)
- Keep original resource if we fail to expand it (Guo Chao)
- Return conventional error values from pci_revert_fw_address() (Bjorn Helgaas)
- Tidy resource assignment messages (Bjorn Helgaas)
- Don't exclude low BIOS area for non-PCI cards (Christoph Schulz)
PCI device hotplug
- Prevent NULL dereference during pciehp probe (Andreas Noever)
- Make pciehp pcie_wait_cmd() self-contained (Bjorn Helgaas)
- Wait for pciehp hotplug command completion lazily (Bjorn Helgaas)
- Compute pciehp timeout from hotplug command start time (Bjorn Helgaas)
- Remove pciehp assumptions about which commands cause completion events (Bjorn Helgaas)
- Clear pciehp Data Link Layer State Changed during init (Myron Stowe)
- Remove pciehp struct controller.no_cmd_complete (Rajat Jain)
- Remove cpqphp unnecessary null test (Fabian Frederick)
- Remove "invalid IRQ" warning for hot-added PCIe ports (Jiang Liu)
IOMMU
- Add DMA alias quirk for Intel 82801 bridge (Alex Williamson)
MSI
- Add internal msix_clear_and_set_ctrl() (Yijing Wang)
- Remove unused msi_enabled_mask() (Yijing Wang)
- Cache Multiple Message Capable in struct msi_desc (Yijing Wang)
- Add msi_setup_entry() to clean up initialization (Yijing Wang)
- Remove unused msi_remove_pci_irq_vectors() (Yijing Wang)
- Retrieve first MSI IRQ from msi_desc rather than pci_dev (Yijing Wang)
- Remove unused list access in __pci_restore_msix_state() (Yijing Wang)
- Use irq_get_msi_desc() to simplify code (Yijing Wang)
Generic host bridge driver
- Fix GPL v2 license string typo (Bjorn Helgaas)
Marvell MVEBU
- Fix GPL v2 license string typo (Thierry Reding)
NVIDIA Tegra
- Use correct initial HW settings (Phil Edworthy)
- Remove rcar_pcie_setup_window() resource argument (Phil Edworthy)
- Fix GPL v2 license string typo (Thierry Reding)
Renesas R-Car
- Remove redundant config accessor register checks (Sergei Shtylyov)
- Fix GPL v2 license string typo (Bjorn Helgaas)
Virtualization
- Factor secondary bus reset logic (Gavin Shan)
- Remove duplicate powerpc reset logic (Gavin Shan)
Miscellaneous
- Rework default VGA detection for EFI (Bruno Prémont)
- Fix sysfs "acpi_index" and "label" errors for NIC renaming (Simone Gotti)
- Configure ASPM at pci_enable_device()-time (Vidya Sagar)
- Add include/linux/pci_ids.h include guard (Rasmus Villemoes)
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Merge tag 'pci-v3.17-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI updates from Bjorn Helgaas:
"I'll be on vacation until Aug 11, and I suspect the merge window will
open before then, so I'm sending this to you early. There are more
things I'd like to get into v3.17, so I hope to send another pull
request soon after I return.
The most notable pieces here are:
- Support BARs up to 128GB (up from 8GB)
- Fix SR-IOV resource assignment when we fail to expand a resource
- Rework pciehp to handle a common hardware erratum
- Cleanup MSI
- Fix NIC renaming issue
- Fix VGA default device issue on EFI systems
- Fix ASPM configuration (previously we didn't enable it as expected)
Alex Williamson has graciously agreed to take care of any major issues
with this if you take it before I return.
Details:
Resource management
- Support BAR sizes up to 128GB (Yinghai Lu)
- Keep original resource if we fail to expand it (Guo Chao)
- Return conventional error values from pci_revert_fw_address() (Bjorn Helgaas)
- Tidy resource assignment messages (Bjorn Helgaas)
- Don't exclude low BIOS area for non-PCI cards (Christoph Schulz)
PCI device hotplug
- Prevent NULL dereference during pciehp probe (Andreas Noever)
- Make pciehp pcie_wait_cmd() self-contained (Bjorn Helgaas)
- Wait for pciehp hotplug command completion lazily (Bjorn Helgaas)
- Compute pciehp timeout from hotplug command start time (Bjorn Helgaas)
- Remove pciehp assumptions about which commands cause completion events (Bjorn Helgaas)
- Clear pciehp Data Link Layer State Changed during init (Myron Stowe)
- Remove pciehp struct controller.no_cmd_complete (Rajat Jain)
- Remove cpqphp unnecessary null test (Fabian Frederick)
- Remove "invalid IRQ" warning for hot-added PCIe ports (Jiang Liu)
IOMMU
- Add DMA alias quirk for Intel 82801 bridge (Alex Williamson)
MSI
- Add internal msix_clear_and_set_ctrl() (Yijing Wang)
- Remove unused msi_enabled_mask() (Yijing Wang)
- Cache Multiple Message Capable in struct msi_desc (Yijing Wang)
- Add msi_setup_entry() to clean up initialization (Yijing Wang)
- Remove unused msi_remove_pci_irq_vectors() (Yijing Wang)
- Retrieve first MSI IRQ from msi_desc rather than pci_dev (Yijing Wang)
- Remove unused list access in __pci_restore_msix_state() (Yijing Wang)
- Use irq_get_msi_desc() to simplify code (Yijing Wang)
Generic host bridge driver
- Fix GPL v2 license string typo (Bjorn Helgaas)
Marvell MVEBU
- Fix GPL v2 license string typo (Thierry Reding)
NVIDIA Tegra
- Use correct initial HW settings (Phil Edworthy)
- Remove rcar_pcie_setup_window() resource argument (Phil Edworthy)
- Fix GPL v2 license string typo (Thierry Reding)
Renesas R-Car
- Remove redundant config accessor register checks (Sergei Shtylyov)
- Fix GPL v2 license string typo (Bjorn Helgaas)
Virtualization
- Factor secondary bus reset logic (Gavin Shan)
- Remove duplicate powerpc reset logic (Gavin Shan)
Miscellaneous
- Rework default VGA detection for EFI (Bruno Prémont)
- Fix sysfs "acpi_index" and "label" errors for NIC renaming (Simone Gotti)
- Configure ASPM at pci_enable_device()-time (Vidya Sagar)
- Add include/linux/pci_ids.h include guard (Rasmus Villemoes)"
* tag 'pci-v3.17-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (38 commits)
PCI/MSI: Use irq_get_msi_desc() to simplify code
PCI/MSI: Remove unused list access in __pci_restore_msix_state()
PCI/MSI: Retrieve first MSI IRQ from msi_desc rather than pci_dev
PCI/MSI: Remove unused function msi_remove_pci_irq_vectors()
PCI/MSI: Add msi_setup_entry() to clean up MSI initialization
PCI: Configure ASPM when enabling device
x86: don't exclude low BIOS area when allocating address space for non-PCI cards
PCI: generic: Fix GPL v2 license string typo
PCI: rcar: Fix GPL v2 license string typo
PCI: tegra: Fix GPL v2 license string typo
PCI: mvebu: Fix GPL v2 license string typo
PCI: Add include guard to include/linux/pci_ids.h
x86, ia64: Move EFI_FB vga_default_device() initialization to pci_vga_fixup()
PCI: Tidy resource assignment messages
PCI: Return conventional error values from pci_revert_fw_address()
PCI: Cleanup control flow
PCI: Support BAR sizes up to 128GB
PCI: cpqphp: Remove unnecessary null test before debugfs_remove()
PCI: pciehp: Clear Data Link Layer State Changed during init
PCI: Add bridge DMA alias quirk for Intel 82801 bridge
...
|
||
Dan Carpenter
|
4c51cb005b |
x86/pmc_atom: Silence shift wrapping warnings in pmc_sleep_tmr_show()
I don't know if we really need 64 bits here but these variables are declared as u64 and it can't hurt to cast this so we prevent any shift wrapping. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Aubrey Li <aubrey.li@linux.intel.com> Link: http://lkml.kernel.org/r/20140801082715.GE28869@mwanda Signed-off-by: H. Peter Anvin <hpa@zytor.com> |
||
|
Linus Torvalds
|
3f9c08f7ce |
Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
"A few fixes for ARM. Some of these are correctness issues:
- TLBs must be flushed after the old mappings are removed by the DMA
mapping code, but before the new mappings are established.
- An off-by-one entry error in the Keystone LPAE setup code.
Fixes include:
- ensuring that the identity mapping for LPAE does not remove the
kernel image from the identity map.
- preventing userspace from trapping into kgdb.
- fixing a preemption issue in the Intel iwmmxt code.
- fixing a build error with nommu.
Other changes include:
- Adding a note about which areas of memory are expected to be
accessible while the identity mapping tables are in place"
* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
ARM: 8124/1: don't enter kgdb when userspace executes a kgdb break instruction
ARM: idmap: add identity mapping usage note
ARM: 8115/1: LPAE: reduce damage caused by idmap to virtual memory layout
ARM: fix alignment of keystone page table fixup
ARM: 8112/1: only select ARM_PATCH_PHYS_VIRT if MMU is enabled
ARM: 8100/1: Fix preemption disable in iwmmxt_task_enable()
ARM: DMA: ensure that old section mappings are flushed from the TLB
|
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Omar Sandoval
|
6bf755db4d |
ARM: 8124/1: don't enter kgdb when userspace executes a kgdb break instruction
The kgdb breakpoint hooks (kgdb_brk_fn and kgdb_compiled_brk_fn) should only be entered when a kgdb break instruction is executed from the kernel. Otherwise, if kgdb is enabled, a userspace program can cause the kernel to drop into the debugger by executing either KGDB_BREAKINST or KGDB_COMPILED_BREAK. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Omar Sandoval <osandov@osandov.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> |
||
Russell King
|
c5cc87fa8d |
ARM: idmap: add identity mapping usage note
Add a note about the usage of the identity mapping; we do not support accesses outside of the identity map region and kernel image while a CPU is using the identity map. This is because the identity mapping may overwrite vmalloc space, IO mappings, the vectors pages, etc. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> |
||
|
Linus Torvalds
|
f88cf230a4 |
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fix from Peter Anvin: "A single fix to not invoke the espfix code on Xen PV, as it turns out to oops the guest when invoked after all. This patch leaves some amount of dead code, in particular unnecessary initialization of the espfix stacks when they won't be used, but in the interest of keeping the patch minimal that cleanup can wait for the next cycle" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86_64/entry/xen: Do not invoke espfix64 on Xen |
||
|
Linus Torvalds
|
9642a1041e |
ARM: Straggler SoC fix for 3.16
A DT bugfix for Nomadik that had an ambigouos double-inversion of a gpio line, and one MAINTAINER URL update that might as well go in now. We could hold off until the merge window, but then we'll just have to mark the DT fix for stable and it just seems like in total causing more work. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) iQIcBAABAgAGBQJT2dyEAAoJEIwa5zzehBx3rZMQAKwoGghFh2t/4USXOWEDT1ns B0cPMvg3wjlOxnJsC4Nvi9BclIBBlUImHoHYG8Un7/aJXkuRpOC36Zg2wWDJUkVC NZOwHAj/wBwPTKQnHKSQ2Nyw/h1t1FidlWt07GcFxmYvl00pfE707MHKiRTd/pUY T4/VELaUXmcJ2/9WqscNLi4TzuQBd5eBb1n48GRzVsTfjJo7jXExCsuKWNOpbPar eDqZjw7KAU73T8d0hJmZtJuI8iZ0I3mMYFrA7Sp1srXEpw/ZKfvn6+SBH3CzZdxz oDXZYYBl4wYuqqW7I42esZkcsyGmCE58KS0tYWZgvQUJzrHeyV6myuEn2qt2ROzQ Ii5huDBSbxNOk2D+v5JevBG8SuDFMS6Op1Gj9fUB7F/+P+EDzccwSkejPZYAnHDd JHWiks6CU4xRzlSrPb4AtQ3UkX0GO1QPlhhT/TQD0wOAn9XMkC9hfYBBn+pnusXm l8F+DSGx2UUziwF2f4tTGcpKeiTN71g8xizHFs4LHhctnVeb/G68a5s1Cxsfq7Bd tW3Y/b1sy5q/TllKTL6qTSqTS+GPldV/w4IwBm4tJs3Q5lMoJErvFQqTEPpIwcRP xDVBT0BpEStvxMNYVhIEE4C50k02zLhqS2CH9pqzHVBFYhhNlp2g23QDsbU2yWgG sPg0G+Ts8yxeS1DZotnq =sz9W -----END PGP SIGNATURE----- Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM straggler SoC fix from Olof Johansson: "A DT bugfix for Nomadik that had an ambigouos double-inversion of a gpio line, and one MAINTAINER URL update that might as well go in now. We could hold off until the merge window, but then we'll just have to mark the DT fix for stable and it just seems like in total causing more work" * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: MAINTAINERS: Update Tegra Git URL ARM: nomadik: fix up double inversion in DT |
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Mark Rutland
|
ea1719672f |
arm64: add newline to I-cache policy string
Due to a missing newline in the I-cache policy detection log output,
it's possible to get some ratehr unfortunate output at boot time:
CPU1: Booted secondary processor
Detected VIPT I-cache on CPU1CPU2: Booted secondary processor
Detected VIPT I-cache on CPU2CPU3: Booted secondary processor
Detected VIPT I-cache on CPU3CPU4: Booted secondary processor
Detected PIPT I-cache on CPU4CPU5: Booted secondary processor
Detected PIPT I-cache on CPU5Brought up 6 CPUs
SMP: Total of 6 processors activated.
This patch adds the missing newline to the format string, cleaning up
the output.
Fixes:
|
||
Mike Turquette
|
d7d3d26fa5 |
Samsung clock patches for 3.17
1) non-critical fixes (without need to push to stable): |
||
Dave Hansen
|
a5102476a2 |
x86/mm: Set TLB flush tunable to sane value (33)
This has been run through Intel's LKP tests across a wide range
of modern sytems and workloads and it wasn't shown to make a
measurable performance difference positive or negative.
Now that we have some shiny new tracepoints, we can actually
figure out what the heck is going on.
During a kernel compile, 60% of the flush_tlb_mm_range() calls
are for a single page. It breaks down like this:
size percent percent<=
V V V
GLOBAL: 2.20% 2.20% avg cycles: 2283
1: 56.92% 59.12% avg cycles: 1276
2: 13.78% 72.90% avg cycles: 1505
3: 8.26% 81.16% avg cycles: 1880
4: 7.41% 88.58% avg cycles: 2447
5: 1.73% 90.31% avg cycles: 2358
6: 1.32% 91.63% avg cycles: 2563
7: 1.14% 92.77% avg cycles: 2862
8: 0.62% 93.39% avg cycles: 3542
9: 0.08% 93.47% avg cycles: 3289
10: 0.43% 93.90% avg cycles: 3570
11: 0.20% 94.10% avg cycles: 3767
12: 0.08% 94.18% avg cycles: 3996
13: 0.03% 94.20% avg cycles: 4077
14: 0.02% 94.23% avg cycles: 4836
15: 0.04% 94.26% avg cycles: 5699
16: 0.06% 94.32% avg cycles: 5041
17: 0.57% 94.89% avg cycles: 5473
18: 0.02% 94.91% avg cycles: 5396
19: 0.03% 94.95% avg cycles: 5296
20: 0.02% 94.96% avg cycles: 6749
21: 0.18% 95.14% avg cycles: 6225
22: 0.01% 95.15% avg cycles: 6393
23: 0.01% 95.16% avg cycles: 6861
24: 0.12% 95.28% avg cycles: 6912
25: 0.05% 95.32% avg cycles: 7190
26: 0.01% 95.33% avg cycles: 7793
27: 0.01% 95.34% avg cycles: 7833
28: 0.01% 95.35% avg cycles: 8253
29: 0.08% 95.42% avg cycles: 8024
30: 0.03% 95.45% avg cycles: 9670
31: 0.01% 95.46% avg cycles: 8949
32: 0.01% 95.46% avg cycles: 9350
33: 3.11% 98.57% avg cycles: 8534
34: 0.02% 98.60% avg cycles: 10977
35: 0.02% 98.62% avg cycles: 11400
We get in to dimishing returns pretty quickly. On pre-IvyBridge
CPUs, we used to set the limit at 8 pages, and it was set at 128
on IvyBrige. That 128 number looks pretty silly considering that
less than 0.5% of the flushes are that large.
The previous code tried to size this number based on the size of
the TLB. Good idea, but it's error-prone, needs maintenance
(which it didn't get up to now), and probably would not matter in
practice much.
Settting it to 33 means that we cover the mallopt
M_TRIM_THRESHOLD, which is the most universally common size to do
flushes.
That's the short version. Here's the long one for why I chose 33:
1. These numbers have a constant bias in the timestamps from the
tracing. Probably counts for a couple hundred cycles in each of
these tests, but it should be fairly _even_ across all of them.
The smallest delta between the tracepoints I have ever seen is
335 cycles. This is one reason the cycles/page cost goes down in
general as the flushes get larger. The true cost is nearer to
100 cycles.
2. A full flush is more expensive than a single invlpg, but not
by much (single percentages).
3. A dtlb miss is 17.1ns (~45 cycles) and a itlb miss is 13.0ns
(~34 cycles). At those rates, refilling the 512-entry dTLB takes
22,000 cycles.
4. 22,000 cycles is approximately the equivalent of doing 85
invlpg operations. But, the odds are that the TLB can
actually be filled up faster than that because TLB misses that
are close in time also tend to leverage the same caches.
6. ~98% of flushes are <=33 pages. There are a lot of flushes of
33 pages, probably because libc's M_TRIM_THRESHOLD is set to
128k (32 pages)
7. I've found no consistent data to support changing the IvyBridge
vs. SandyBridge tunable by a factor of 16
I used the performance counters on this hardware (IvyBridge i5-3320M)
to figure out the tlb miss costs:
ocperf.py stat -e dtlb_load_misses.walk_duration,dtlb_load_misses.walk_completed,dtlb_store_misses.walk_duration,dtlb_store_misses.walk_completed,itlb_misses.walk_duration,itlb_misses.walk_completed,itlb.itlb_flush
7,720,030,970 dtlb_load_misses_walk_duration [57.13%]
169,856,353 dtlb_load_misses_walk_completed [57.15%]
708,832,859 dtlb_store_misses_walk_duration [57.17%]
19,346,823 dtlb_store_misses_walk_completed [57.17%]
2,779,687,402 itlb_misses_walk_duration [57.15%]
82,241,148 itlb_misses_walk_completed [57.13%]
770,717 itlb_itlb_flush [57.11%]
Show that a dtlb miss is 17.1ns (~45 cycles) and a itlb miss is 13.0ns
(~34 cycles). At those rates, refilling the 512-entry dTLB takes
22,000 cycles. On a SandyBridge system with more cores and larger
caches, those are dtlb=13.4ns and itlb=9.5ns.
cat perf.stat.txt | perl -pe 's/,//g'
| awk '/itlb_misses_walk_duration/ { icyc+=$1 }
/itlb_misses_walk_completed/ { imiss+=$1 }
/dtlb_.*_walk_duration/ { dcyc+=$1 }
/dtlb_.*.*completed/ { dmiss+=$1 }
END {print "itlb cyc/miss: ", icyc/imiss, " dtlb cyc/miss: ", dcyc/dmiss, " ----- ", icyc,imiss, dcyc,dmiss }
On Westmere CPUs, the counters to use are: itlb_flush,itlb_misses.walk_cycles,itlb_misses.any,dtlb_misses.walk_cycles,dtlb_misses.any
The assumptions that this code went in under:
https://lkml.org/lkml/2012/6/12/119 say that a flush and a refill are
about 100ns. Being generous, that is over by a factor of 6 on the
refill side, although it is fairly close on the cost of an invlpg.
An increase of a single invlpg operation seems to lengthen the flush
range operation by about 200 cycles. Here is one example of the data
collected for flushing 10 and 11 pages (full data are below):
10: 0.43% 93.90% avg cycles: 3570 cycles/page: 357 samples: 4714
11: 0.20% 94.10% avg cycles: 3767 cycles/page: 342 samples: 2145
How to generate this table:
echo 10000 > /sys/kernel/debug/tracing/buffer_size_kb
echo x86-tsc > /sys/kernel/debug/tracing/trace_clock
echo 'reason != 0' > /sys/kernel/debug/tracing/events/tlb/tlb_flush/filter
echo 1 > /sys/kernel/debug/tracing/events/tlb/tlb_flush/enable
Pipe the trace output in to this script:
http://sr71.net/~dave/intel/201402-tlb/trace-time-diff-process.pl.txt
Note that these data were gathered with the invlpg threshold set to
150 pages. Only data points with >=50 of samples were printed:
Flush % of %<=
in flush this
pages es size
------------------------------------------------------------------------------
-1: 2.20% 2.20% avg cycles: 2283 cycles/page: xxxx samples: 23960
1: 56.92% 59.12% avg cycles: 1276 cycles/page: 1276 samples: 620895
2: 13.78% 72.90% avg cycles: 1505 cycles/page: 752 samples: 150335
3: 8.26% 81.16% avg cycles: 1880 cycles/page: 626 samples: 90131
4: 7.41% 88.58% avg cycles: 2447 cycles/page: 611 samples: 80877
5: 1.73% 90.31% avg cycles: 2358 cycles/page: 471 samples: 18885
6: 1.32% 91.63% avg cycles: 2563 cycles/page: 427 samples: 14397
7: 1.14% 92.77% avg cycles: 2862 cycles/page: 408 samples: 12441
8: 0.62% 93.39% avg cycles: 3542 cycles/page: 442 samples: 6721
9: 0.08% 93.47% avg cycles: 3289 cycles/page: 365 samples: 917
10: 0.43% 93.90% avg cycles: 3570 cycles/page: 357 samples: 4714
11: 0.20% 94.10% avg cycles: 3767 cycles/page: 342 samples: 2145
12: 0.08% 94.18% avg cycles: 3996 cycles/page: 333 samples: 864
13: 0.03% 94.20% avg cycles: 4077 cycles/page: 313 samples: 289
14: 0.02% 94.23% avg cycles: 4836 cycles/page: 345 samples: 236
15: 0.04% 94.26% avg cycles: 5699 cycles/page: 379 samples: 390
16: 0.06% 94.32% avg cycles: 5041 cycles/page: 315 samples: 643
17: 0.57% 94.89% avg cycles: 5473 cycles/page: 321 samples: 6229
18: 0.02% 94.91% avg cycles: 5396 cycles/page: 299 samples: 224
19: 0.03% 94.95% avg cycles: 5296 cycles/page: 278 samples: 367
20: 0.02% 94.96% avg cycles: 6749 cycles/page: 337 samples: 185
21: 0.18% 95.14% avg cycles: 6225 cycles/page: 296 samples: 1964
22: 0.01% 95.15% avg cycles: 6393 cycles/page: 290 samples: 83
23: 0.01% 95.16% avg cycles: 6861 cycles/page: 298 samples: 61
24: 0.12% 95.28% avg cycles: 6912 cycles/page: 288 samples: 1307
25: 0.05% 95.32% avg cycles: 7190 cycles/page: 287 samples: 533
26: 0.01% 95.33% avg cycles: 7793 cycles/page: 299 samples: 94
27: 0.01% 95.34% avg cycles: 7833 cycles/page: 290 samples: 66
28: 0.01% 95.35% avg cycles: 8253 cycles/page: 294 samples: 73
29: 0.08% 95.42% avg cycles: 8024 cycles/page: 276 samples: 846
30: 0.03% 95.45% avg cycles: 9670 cycles/page: 322 samples: 296
31: 0.01% 95.46% avg cycles: 8949 cycles/page: 288 samples: 79
32: 0.01% 95.46% avg cycles: 9350 cycles/page: 292 samples: 60
33: 3.11% 98.57% avg cycles: 8534 cycles/page: 258 samples: 33936
34: 0.02% 98.60% avg cycles: 10977 cycles/page: 322 samples: 268
35: 0.02% 98.62% avg cycles: 11400 cycles/page: 325 samples: 177
36: 0.01% 98.63% avg cycles: 11504 cycles/page: 319 samples: 161
37: 0.02% 98.65% avg cycles: 11596 cycles/page: 313 samples: 182
38: 0.02% 98.66% avg cycles: 11850 cycles/page: 311 samples: 195
39: 0.01% 98.68% avg cycles: 12158 cycles/page: 311 samples: 128
40: 0.01% 98.68% avg cycles: 11626 cycles/page: 290 samples: 78
41: 0.04% 98.73% avg cycles: 11435 cycles/page: 278 samples: 477
42: 0.01% 98.73% avg cycles: 12571 cycles/page: 299 samples: 74
43: 0.01% 98.74% avg cycles: 12562 cycles/page: 292 samples: 78
44: 0.01% 98.75% avg cycles: 12991 cycles/page: 295 samples: 108
45: 0.01% 98.76% avg cycles: 13169 cycles/page: 292 samples: 78
46: 0.02% 98.78% avg cycles: 12891 cycles/page: 280 samples: 261
47: 0.01% 98.79% avg cycles: 13099 cycles/page: 278 samples: 67
48: 0.01% 98.80% avg cycles: 13851 cycles/page: 288 samples: 77
49: 0.01% 98.80% avg cycles: 13749 cycles/page: 280 samples: 66
50: 0.01% 98.81% avg cycles: 13949 cycles/page: 278 samples: 73
52: 0.00% 98.82% avg cycles: 14243 cycles/page: 273 samples: 52
54: 0.01% 98.83% avg cycles: 15312 cycles/page: 283 samples: 87
55: 0.01% 98.84% avg cycles: 15197 cycles/page: 276 samples: 109
56: 0.02% 98.86% avg cycles: 15234 cycles/page: 272 samples: 208
57: 0.00% 98.86% avg cycles: 14888 cycles/page: 261 samples: 53
58: 0.01% 98.87% avg cycles: 15037 cycles/page: 259 samples: 59
59: 0.01% 98.87% avg cycles: 15752 cycles/page: 266 samples: 63
62: 0.00% 98.89% avg cycles: 16222 cycles/page: 261 samples: 54
64: 0.02% 98.91% avg cycles: 17179 cycles/page: 268 samples: 248
65: 0.12% 99.03% avg cycles: 18762 cycles/page: 288 samples: 1324
85: 0.00% 99.10% avg cycles: 21649 cycles/page: 254 samples: 50
127: 0.01% 99.18% avg cycles: 32397 cycles/page: 255 samples: 75
128: 0.13% 99.31% avg cycles: 31711 cycles/page: 247 samples: 1466
129: 0.18% 99.49% avg cycles: 33017 cycles/page: 255 samples: 1927
181: 0.33% 99.84% avg cycles: 2489 cycles/page: 13 samples: 3547
256: 0.05% 99.91% avg cycles: 2305 cycles/page: 9 samples: 550
512: 0.03% 99.95% avg cycles: 2133 cycles/page: 4 samples: 304
1512: 0.01% 99.99% avg cycles: 3038 cycles/page: 2 samples: 65
Here are the tlb counters during a 10-second slice of a kernel compile
for a SandyBridge system. It's better than IvyBridge, but probably
due to the larger caches since this was one of the 'X' extreme parts.
10,873,007,282 dtlb_load_misses_walk_duration
250,711,333 dtlb_load_misses_walk_completed
1,212,395,865 dtlb_store_misses_walk_duration
31,615,772 dtlb_store_misses_walk_completed
5,091,010,274 itlb_misses_walk_duration
163,193,511 itlb_misses_walk_completed
1,321,980 itlb_itlb_flush
10.008045158 seconds time elapsed
# cat perf.stat.1392743721.txt | perl -pe 's/,//g' | awk '/itlb_misses_walk_duration/ { icyc+=$1 } /itlb_misses_walk_completed/ { imiss+=$1 } /dtlb_.*_walk_duration/ { dcyc+=$1 } /dtlb_.*.*completed/ { dmiss+=$1 } END {print "itlb cyc/miss: ", icyc/imiss/3.3, " dtlb cyc/miss: ", dcyc/dmiss/3.3, " ----- ", icyc,imiss, dcyc,dmiss }'
itlb ns/miss: 9.45338 dtlb ns/miss: 12.9716
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: http://lkml.kernel.org/r/20140731154103.10C1115E@viggo.jf.intel.com
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
|
||
|
Dave Hansen
|
2d040a1ce9 |
x86/mm: New tunable for single vs full TLB flush
Most of the logic here is in the documentation file. Please take a look at it. I know we've come full-circle here back to a tunable, but this new one is *WAY* simpler. I challenge anyone to describe in one sentence how the old one worked. Here's the way the new one works: If we are flushing more pages than the ceiling, we use the full flush, otherwise we use per-page flushes. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Link: http://lkml.kernel.org/r/20140731154101.12B52CAF@viggo.jf.intel.com Acked-by: Rik van Riel <riel@redhat.com> Acked-by: Mel Gorman <mgorman@suse.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> |
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Dave Hansen
|
d17d8f9ded |
x86/mm: Add tracepoints for TLB flushes
We don't have any good way to figure out what kinds of flushes are being attempted. Right now, we can try to use the vm counters, but those only tell us what we actually did with the hardware (one-by-one vs full) and don't tell us what was actually _requested_. This allows us to select out "interesting" TLB flushes that we might want to optimize (like the ranged ones) and ignore the ones that we have very little control over (the ones at context switch). Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Link: http://lkml.kernel.org/r/20140731154059.4C96CBA5@viggo.jf.intel.com Acked-by: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> |
||
|
Dave Hansen
|
a23421f111 |
x86/mm: Unify remote INVLPG code
There are currently three paths through the remote flush code: 1. full invalidation 2. single page invalidation using invlpg 3. ranged invalidation using invlpg This takes 2 and 3 and combines them in to a single path by making the single-page one just be the start and end be start plus a single page. This makes placement of our tracepoint easier. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Link: http://lkml.kernel.org/r/20140731154058.E0F90408@viggo.jf.intel.com Cc: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> |
||
|
Dave Hansen
|
9dfa6dee53 |
x86/mm: Fix missed global TLB flush stat
If we take the
if (end == TLB_FLUSH_ALL || vmflag & VM_HUGETLB) {
local_flush_tlb();
goto out;
}
path out of flush_tlb_mm_range(), we will have flushed the tlb,
but not incremented NR_TLB_LOCAL_FLUSH_ALL. This unifies the
way out of the function so that we always take a single path when
doing a full tlb flush.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: http://lkml.kernel.org/r/20140731154056.FF763B76@viggo.jf.intel.com
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
|
||
|
Dave Hansen
|
e9f4e0a9fe |
x86/mm: Rip out complicated, out-of-date, buggy TLB flushing
I think the flush_tlb_mm_range() code that tries to tune the flush sizes based on the CPU needs to get ripped out for several reasons: 1. It is obviously buggy. It uses mm->total_vm to judge the task's footprint in the TLB. It should certainly be using some measure of RSS, *NOT* ->total_vm since only resident memory can populate the TLB. 2. Haswell, and several other CPUs are missing from the intel_tlb_flushall_shift_set() function. Thus, it has been demonstrated to bitrot quickly in practice. 3. It is plain wrong in my vm: [ 0.037444] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0 [ 0.037444] Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0 [ 0.037444] tlb_flushall_shift: 6 Which leads to it to never use invlpg. 4. The assumptions about TLB refill costs are wrong: http://lkml.kernel.org/r/1337782555-8088-3-git-send-email-alex.shi@intel.com (more on this in later patches) 5. I can not reproduce the original data: https://lkml.org/lkml/2012/5/17/59 I believe the sample times were too short. Running the benchmark in a loop yields times that vary quite a bit. Note that this leaves us with a static ceiling of 1 page. This is a conservative, dumb setting, and will be revised in a later patch. This also removes the code which attempts to predict whether we are flushing data or instructions. We expect instruction flushes to be relatively rare and not worth tuning for explicitly. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Link: http://lkml.kernel.org/r/20140731154055.ABC88E89@viggo.jf.intel.com Acked-by: Rik van Riel <riel@redhat.com> Acked-by: Mel Gorman <mgorman@suse.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> |
||
|
Dave Hansen
|
4995ab9cf5 |
x86/mm: Clean up the TLB flushing code
The if (cpumask_any_but(mm_cpumask(mm), smp_processor_id()) < nr_cpu_ids) line of code is not exactly the easiest to audit, especially when it ends up at two different indentation levels. This eliminates one of the the copy-n-paste versions. It also gives us a unified exit point for each path through this function. We need this in a minute for our tracepoint. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Link: http://lkml.kernel.org/r/20140731154054.44F1CDDC@viggo.jf.intel.com Acked-by: Rik van Riel <riel@redhat.com> Acked-by: Mel Gorman <mgorman@suse.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> |
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Mark D Rustad
|
42cbc04fd3 |
x86/kvm: Resolve shadow warnings in macro expansion
Resolve shadow warnings that appear in W=2 builds. Instead of using ret to hold the return pointer, save the length in a new variable saved_len and compute the pointer on exit. This also resolves a very technical error, in that ret was declared as a const char *, when it really was a char * const. Signed-off-by: Mark Rustad <mark.d.rustad@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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Paolo Bonzini
|
307d2740b1 |
Two fixes for recently introduced regressions
- a memory leak on busy SIGP - pontentially lost SIGP stop in rare situations (shutdown loops) The first issue is not part of a released kernel. The 2nd issue is present in all KVM versions, but did not trigger before commit |
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Will Deacon
|
9415667584 |
Revert "arm64: dmi: Add SMBIOS/DMI support"
This reverts commit
|
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byungchul.park
|
e4aa297a49 |
arm64: fpsimd: fix a typo in fpsimd_save_partial_state ENDPROC
Commit
|
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|
Will Deacon
|
c878e0cff5 |
arm64: don't call break hooks for BRK exceptions from EL0
Our break hooks are used to handle brk exceptions from kgdb (and potentially kprobes if that code ever resurfaces), so don't bother calling them if the BRK exception comes from userspace. This prevents userspace from trapping to a kdb shell on systems where kgdb is enabled and active. Cc: <stable@vger.kernel.org> Reported-by: Omar Sandoval <osandov@osandov.com> Signed-off-by: Will Deacon <will.deacon@arm.com> |
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David Hildenbrand
|
db37386147 |
KVM: s390: rework broken SIGP STOP interrupt handling
A VCPU might never stop if it intercepts (for whatever reason) between "fake interrupt delivery" and execution of the stop function. Heart of the problem is that SIGP STOP is an interrupt that has to be processed on every SIE entry until the VCPU finally executes the stop function. This problem was made apparent by commit |
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Linus Walleij
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3181788c3a |
ARM: nomadik: fix up double inversion in DT
The GPIO pin connected to card detect was inverted twice: once by
the argument to the GPIO line itself where it was magically marked
as active low by the flag GPIO_ACTIVE_LOW (0x01) in the third cell,
and also marked active low AGAIN by explicitly stating
"cd-inverted" (a deprecated method).
After commit
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H. Peter Anvin
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c3107e3c50 |
APEI is currently implemented so that it depends on x86 hardware.
The primary dependency is that GHES uses the x86 NMI for hardware error notification and MCE for memory error handling. These patches remove that dependency. Other APEI features such as error reporting via external IRQ, error serialization, or error injection, do not require changes to use them on non-x86 architectures. The following patch set eliminates the APEI Kconfig x86 dependency by making these changes: - treat NMI notification as GHES architecture - HAVE_ACPI_APEI_NMI - group and wrap around #ifdef CONFIG_HAVE_ACPI_APEI_NMI code which is used only for NMI path - identify architectural boxes and abstract it accordingly (tlb flush and MCE) - rework ioremap for both IRQ and NMI context NMI code is kept in ghes.c file since NMI and IRQ context are tightly coupled. Note, these patches introduce no functional changes for x86. The NMI notification feature is hard selected for x86. Architectures that want to use this feature should also provide NMI code infrastructure. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJT2BaPAAoJEKurIx+X31iBLGMP/0yyWOna4229p9CmuElSP3os Kb+9Thru+Wg4ihj43CYW0nznQnamCaqBa5NpDXZn0Ebtxc08SSGVzbf+z+vBMeD+ HW4093m4g8sGL7i4JdAol0MEPpKTQRdpj525N/h/xWVSDXQ0Bq3vQ7DS1/j1Bp4k Lq3G8dEk+4LjNPcQ5YBPl71zWJOC4iUctfh1OpFdfgA04804Vis3j8T6ljE7/72M 51xXK3af9ktIg6MU2HOwraUsSspVeJs/4lPu4fab4XI07BRDb4T7yx19a9VaBy67 m6TaTd3eC/Z0Uh+51grNuXSnWQK4fvahRZJEwiRdC0wL3w3mhdZkmqm0nBdBFyof 5b251+FOazOtZdMsWS/mMjQUjybQ+4k9zpnndIPw/5rqxJ8lgaP7o81e+hw1Xh1Q E0ZWUMXnAIkRmkyYLUv5aTICRYIZtAC/C1QrR5ZB/9Q+yvtxp13dbqGzWhcF7AIw UK/yb5T5ZAzvuJlmPG0ZiV75HH9bjX4OFV3AhXJIEG/iTOdVVpat8yICFrT33Xpc uAwRXQvz6mn2c2xpZcJqSJQlXKg2nbrfUmscU8P8Zu6mQpvBB/+2cDbW/5wfuKbE NpD0aB5PxhHY+nNvIfOsTUk72aZcZdUEQJt/792vhnMYb/IK1X/qa4zrVmOqlZKt mtXwUQWdj3kSG36mgssO =nYdd -----END PGP SIGNATURE----- Merge tag 'please-pull-apei' into x86/ras APEI is currently implemented so that it depends on x86 hardware. The primary dependency is that GHES uses the x86 NMI for hardware error notification and MCE for memory error handling. These patches remove that dependency. Other APEI features such as error reporting via external IRQ, error serialization, or error injection, do not require changes to use them on non-x86 architectures. The following patch set eliminates the APEI Kconfig x86 dependency by making these changes: - treat NMI notification as GHES architecture - HAVE_ACPI_APEI_NMI - group and wrap around #ifdef CONFIG_HAVE_ACPI_APEI_NMI code which is used only for NMI path - identify architectural boxes and abstract it accordingly (tlb flush and MCE) - rework ioremap for both IRQ and NMI context NMI code is kept in ghes.c file since NMI and IRQ context are tightly coupled. Note, these patches introduce no functional changes for x86. The NMI notification feature is hard selected for x86. Architectures that want to use this feature should also provide NMI code infrastructure. |
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Linus Torvalds
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26bcd8b725 |
Device tree Exynos bug fix for v3.16-rc7
Exynos has buggy firmware that puts bad data into the memory node. Commit |
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Linus Torvalds
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acba648dca |
Fix BUG when trying to expand the grant table. This seems to occur
often during boot with Ubuntu 14.04 PV guests. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJT2PhgAAoJEFxbo/MsZsTRlzIH/1HjbkGZmRlOj5wcrYlWCUJ/ DGLBHc76so52xd9oP8COT5tuSVP6/usPPLFaOmVZ7fMiOpoyz9d3lc0g56otw3gJ tTUFTyW0EoFtvmIl50OMC726p9azETjA3P2XJkV/D3GhBGGqgrP5uR+mRvisvq3y eGZEx1UIHv1jov47TBFR1NcckXBWw+6J9m34y9h6an9VNDCuuGwYZ8dfGAFsLrVb lGLTmgQQmyk4SexVINfOwL40KkVDVEq+X74HcPviyNHEIy66xLzMtKpL+Sf4xeuv VG3JhqAUGuRGGK48rrbpxhBbpxGp35O9RV68YrGssxfuTejSYduw5zTzzt30QIA= =cr8X -----END PGP SIGNATURE----- Merge tag 'stable/for-linus-3.16-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull Xen fix from David Vrabel: "Fix BUG when trying to expand the grant table. This seems to occur often during boot with Ubuntu 14.04 PV guests" * tag 'stable/for-linus-3.16-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: x86/xen: safely map and unmap grant frames when in atomic context |
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Robert Richter
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3666f88010 |
arm64: defconfig: enable devtmpfs mount option
Matching x86 and making it more convenient to run the arm64 default kernel as distros like Ubuntu need this option. Signed-off-by: Robert Richter <rrichter@cavium.com> Signed-off-by: Will Deacon <will.deacon@arm.com> |
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Chris J Arges
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296f047502 |
KVM: vmx: remove duplicate vmx_mpx_supported() prototype
Remove a prototype which was added by both |
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Arun Chandran
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1915e2ad1c |
arm64: vdso: fix build error when switching from LE to BE
Building a kernel with CPU_BIG_ENDIAN fails if there are stale objects from a !CPU_BIG_ENDIAN build. Due to a missing FORCE prerequisite on an if_changed rule in the VDSO Makefile, we attempt to link a stale LE object into the new BE kernel. According to Documentation/kbuild/makefiles.txt, FORCE is required for if_changed rules and forgetting it is a common mistake, so fix it by 'Forcing' the build of vdso. This patch fixes build errors like these: arch/arm64/kernel/vdso/note.o: compiled for a little endian system and target is big endian failed to merge target specific data of file arch/arm64/kernel/vdso/note.o arch/arm64/kernel/vdso/sigreturn.o: compiled for a little endian system and target is big endian failed to merge target specific data of file arch/arm64/kernel/vdso/sigreturn.o Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Arun Chandran <achandran@mvista.com> Signed-off-by: Will Deacon <will.deacon@arm.com> |
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Christian Borntraeger
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d514f42641 |
KVM: s390: Fix memory leak on busy SIGP stop
commit
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David Vrabel
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b7dd0e350e |
x86/xen: safely map and unmap grant frames when in atomic context
arch_gnttab_map_frames() and arch_gnttab_unmap_frames() are called in atomic context but were calling alloc_vm_area() which might sleep. Also, if a driver attempts to allocate a grant ref from an interrupt and the table needs expanding, then the CPU may already by in lazy MMU mode and apply_to_page_range() will BUG when it tries to re-enable lazy MMU mode. These two functions are only used in PV guests. Introduce arch_gnttab_init() to allocates the virtual address space in advance. Avoid the use of apply_to_page_range() by using saving and using the array of PTE addresses from the alloc_vm_area() call (which ensures that the required page tables are pre-allocated). Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
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Laura Abbott
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5a12a597a8 |
arm: Add devicetree fixup machine function
Commit
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