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1959ba4e |
| 25-Aug-2020 |
Mark Brown <broonie@kernel.org> |
Merge tag 'v5.9-rc2' into asoc-5.9
Linux 5.9-rc2
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#
2d9ad4cf |
| 25-Aug-2020 |
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> |
Merge tag 'v5.9-rc2' into drm-misc-fixes
Backmerge requested by Tomi for a fix to omap inconsistent locking state issue, and because we need at least v5.9-rc2 now.
Signed-off-by: Maarten Lankhorst
Merge tag 'v5.9-rc2' into drm-misc-fixes
Backmerge requested by Tomi for a fix to omap inconsistent locking state issue, and because we need at least v5.9-rc2 now.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
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Revision tags: v5.9-rc2 |
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#
d85ddd13 |
| 18-Aug-2020 |
Maxime Ripard <maxime@cerno.tech> |
Merge v5.9-rc1 into drm-misc-next
Sam needs 5.9-rc1 to have dev_err_probe in to merge some patches.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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Revision tags: v5.9-rc1 |
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#
bf9c912f |
| 07-Aug-2020 |
Ricardo Neri <ricardo.neri-calderon@linux.intel.com> |
x86/cpu: Use SERIALIZE in sync_core() when available
The SERIALIZE instruction gives software a way to force the processor to complete all modifications to flags, registers and memory from previous
x86/cpu: Use SERIALIZE in sync_core() when available
The SERIALIZE instruction gives software a way to force the processor to complete all modifications to flags, registers and memory from previous instructions and drain all buffered writes to memory before the next instruction is fetched and executed. Thus, it serves the purpose of sync_core(). Use it when available.
Suggested-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Tony Luck <tony.luck@intel.com> Link: https://lkml.kernel.org/r/20200807032833.17484-1-ricardo.neri-calderon@linux.intel.com
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#
94fb1afb |
| 06-Aug-2020 |
Arnaldo Carvalho de Melo <acme@redhat.com> |
Mgerge remote-tracking branch 'torvalds/master' into perf/core
To sync headers, for instance, in this case tools/perf was ahead of upstream till Linus merged tip/perf/core to get the PERF_RECORD_TEX
Mgerge remote-tracking branch 'torvalds/master' into perf/core
To sync headers, for instance, in this case tools/perf was ahead of upstream till Linus merged tip/perf/core to get the PERF_RECORD_TEXT_POKE changes:
Warning: Kernel ABI header at 'tools/include/uapi/linux/perf_event.h' differs from latest version at 'include/uapi/linux/perf_event.h' diff -u tools/include/uapi/linux/perf_event.h include/uapi/linux/perf_event.h
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
335ad94c |
| 04-Aug-2020 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'x86-cpu-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cpu updates from Ingo Molar:
- prepare for Intel's new SERIALIZE instruction
- enable split-lock
Merge tag 'x86-cpu-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cpu updates from Ingo Molar:
- prepare for Intel's new SERIALIZE instruction
- enable split-lock debugging on more CPUs
- add more Intel CPU models
- optimize stack canary initialization a bit
- simplify the Spectre logic a bit
* tag 'x86-cpu-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/cpu: Refactor sync_core() for readability x86/cpu: Relocate sync_core() to sync_core.h x86/cpufeatures: Add enumeration for SERIALIZE instruction x86/split_lock: Enable the split lock feature on Sapphire Rapids and Alder Lake CPUs x86/cpu: Add Lakefield, Alder Lake and Rocket Lake models to the to Intel CPU family x86/stackprotector: Pre-initialize canary for secondary CPUs x86/speculation: Merge one test in spectre_v2_user_select_mitigation()
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#
3b5d1afd |
| 03-Aug-2020 |
Takashi Iwai <tiwai@suse.de> |
Merge branch 'for-next' into for-linus
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Revision tags: v5.8 |
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#
f69ca629 |
| 27-Jul-2020 |
Ricardo Neri <ricardo.neri-calderon@linux.intel.com> |
x86/cpu: Refactor sync_core() for readability
Instead of having #ifdef/#endif blocks inside sync_core() for X86_64 and X86_32, implement the new function iret_to_self() with two versions.
In this m
x86/cpu: Refactor sync_core() for readability
Instead of having #ifdef/#endif blocks inside sync_core() for X86_64 and X86_32, implement the new function iret_to_self() with two versions.
In this manner, avoid having to use even more more #ifdef/#endif blocks when adding support for SERIALIZE in sync_core().
Co-developed-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20200727043132.15082-4-ricardo.neri-calderon@linux.intel.com
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Revision tags: v5.8-rc7, v5.8-rc6, v5.8-rc5, v5.8-rc4 |
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#
98817a84 |
| 30-Jun-2020 |
Thomas Gleixner <tglx@linutronix.de> |
Merge tag 'irqchip-fixes-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent
Pull irqchip fixes from Marc Zyngier:
- Fix atomicity of affinity update in the G
Merge tag 'irqchip-fixes-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent
Pull irqchip fixes from Marc Zyngier:
- Fix atomicity of affinity update in the GIC driver - Don't sleep in atomic when waiting for a GICv4.1 RD to respond - Fix a couple of typos in user-visible messages
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#
77346a70 |
| 30-Jun-2020 |
Joerg Roedel <jroedel@suse.de> |
Merge tag 'v5.8-rc3' into arm/qcom
Linux 5.8-rc3
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#
60e9eabf |
| 29-Jun-2020 |
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> |
Backmerge remote-tracking branch 'drm/drm-next' into drm-misc-next
Some conflicts with ttm_bo->offset removal, but drm-misc-next needs updating to v5.8.
Signed-off-by: Maarten Lankhorst <maarten.la
Backmerge remote-tracking branch 'drm/drm-next' into drm-misc-next
Some conflicts with ttm_bo->offset removal, but drm-misc-next needs updating to v5.8.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
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Revision tags: v5.8-rc3 |
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#
0f69403d |
| 25-Jun-2020 |
Jani Nikula <jani.nikula@intel.com> |
Merge drm/drm-next into drm-intel-next-queued
Catch up with upstream, in particular to get c1e8d7c6a7a6 ("mmap locking API: convert mmap_sem comments").
Signed-off-by: Jani Nikula <jani.nikula@inte
Merge drm/drm-next into drm-intel-next-queued
Catch up with upstream, in particular to get c1e8d7c6a7a6 ("mmap locking API: convert mmap_sem comments").
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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Revision tags: v5.8-rc2 |
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#
08a7c777 |
| 17-Jun-2020 |
Arnaldo Carvalho de Melo <acme@redhat.com> |
Merge remote-tracking branch 'torvalds/master' into perf/urgent
To get some newer headers that got out of sync with the copies in tools/ so that we can try to have the tools/perf/ build clean for v5
Merge remote-tracking branch 'torvalds/master' into perf/urgent
To get some newer headers that got out of sync with the copies in tools/ so that we can try to have the tools/perf/ build clean for v5.8 with fewer pull requests.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
6870112c |
| 17-Jun-2020 |
Mark Brown <broonie@kernel.org> |
Merge tag 'v5.8-rc1' into regulator-5.8
Linux 5.8-rc1
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#
07c7b547 |
| 16-Jun-2020 |
Tony Lindgren <tony@atomide.com> |
Merge tag 'v5.8-rc1' into fixes
Linux 5.8-rc1
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4b3c1f1b |
| 16-Jun-2020 |
Thomas Zimmermann <tzimmermann@suse.de> |
Merge v5.8-rc1 into drm-misc-fixes
Beginning a new release cycles for what will become v5.8. Updating drm-misc-fixes accordingly.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
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Revision tags: v5.8-rc1 |
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#
076f14be |
| 13-Jun-2020 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'x86-entry-2020-06-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 entry updates from Thomas Gleixner: "The x86 entry, exception and interrupt code rework
This al
Merge tag 'x86-entry-2020-06-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 entry updates from Thomas Gleixner: "The x86 entry, exception and interrupt code rework
This all started about 6 month ago with the attempt to move the Posix CPU timer heavy lifting out of the timer interrupt code and just have lockless quick checks in that code path. Trivial 5 patches.
This unearthed an inconsistency in the KVM handling of task work and the review requested to move all of this into generic code so other architectures can share.
Valid request and solved with another 25 patches but those unearthed inconsistencies vs. RCU and instrumentation.
Digging into this made it obvious that there are quite some inconsistencies vs. instrumentation in general. The int3 text poke handling in particular was completely unprotected and with the batched update of trace events even more likely to expose to endless int3 recursion.
In parallel the RCU implications of instrumenting fragile entry code came up in several discussions.
The conclusion of the x86 maintainer team was to go all the way and make the protection against any form of instrumentation of fragile and dangerous code pathes enforcable and verifiable by tooling.
A first batch of preparatory work hit mainline with commit d5f744f9a2ac ("Pull x86 entry code updates from Thomas Gleixner")
That (almost) full solution introduced a new code section '.noinstr.text' into which all code which needs to be protected from instrumentation of all sorts goes into. Any call into instrumentable code out of this section has to be annotated. objtool has support to validate this.
Kprobes now excludes this section fully which also prevents BPF from fiddling with it and all 'noinstr' annotated functions also keep ftrace off. The section, kprobes and objtool changes are already merged.
The major changes coming with this are:
- Preparatory cleanups
- Annotating of relevant functions to move them into the noinstr.text section or enforcing inlining by marking them __always_inline so the compiler cannot misplace or instrument them.
- Splitting and simplifying the idtentry macro maze so that it is now clearly separated into simple exception entries and the more interesting ones which use interrupt stacks and have the paranoid handling vs. CR3 and GS.
- Move quite some of the low level ASM functionality into C code:
- enter_from and exit to user space handling. The ASM code now calls into C after doing the really necessary ASM handling and the return path goes back out without bells and whistels in ASM.
- exception entry/exit got the equivivalent treatment
- move all IRQ tracepoints from ASM to C so they can be placed as appropriate which is especially important for the int3 recursion issue.
- Consolidate the declaration and definition of entry points between 32 and 64 bit. They share a common header and macros now.
- Remove the extra device interrupt entry maze and just use the regular exception entry code.
- All ASM entry points except NMI are now generated from the shared header file and the corresponding macros in the 32 and 64 bit entry ASM.
- The C code entry points are consolidated as well with the help of DEFINE_IDTENTRY*() macros. This allows to ensure at one central point that all corresponding entry points share the same semantics. The actual function body for most entry points is in an instrumentable and sane state.
There are special macros for the more sensitive entry points, e.g. INT3 and of course the nasty paranoid #NMI, #MCE, #DB and #DF. They allow to put the whole entry instrumentation and RCU handling into safe places instead of the previous pray that it is correct approach.
- The INT3 text poke handling is now completely isolated and the recursion issue banned. Aside of the entry rework this required other isolation work, e.g. the ability to force inline bsearch.
- Prevent #DB on fragile entry code, entry relevant memory and disable it on NMI, #MC entry, which allowed to get rid of the nested #DB IST stack shifting hackery.
- A few other cleanups and enhancements which have been made possible through this and already merged changes, e.g. consolidating and further restricting the IDT code so the IDT table becomes RO after init which removes yet another popular attack vector
- About 680 lines of ASM maze are gone.
There are a few open issues:
- An escape out of the noinstr section in the MCE handler which needs some more thought but under the aspect that MCE is a complete trainwreck by design and the propability to survive it is low, this was not high on the priority list.
- Paravirtualization
When PV is enabled then objtool complains about a bunch of indirect calls out of the noinstr section. There are a few straight forward ways to fix this, but the other issues vs. general correctness were more pressing than parawitz.
- KVM
KVM is inconsistent as well. Patches have been posted, but they have not yet been commented on or picked up by the KVM folks.
- IDLE
Pretty much the same problems can be found in the low level idle code especially the parts where RCU stopped watching. This was beyond the scope of the more obvious and exposable problems and is on the todo list.
The lesson learned from this brain melting exercise to morph the evolved code base into something which can be validated and understood is that once again the violation of the most important engineering principle "correctness first" has caused quite a few people to spend valuable time on problems which could have been avoided in the first place. The "features first" tinkering mindset really has to stop.
With that I want to say thanks to everyone involved in contributing to this effort. Special thanks go to the following people (alphabetical order): Alexandre Chartre, Andy Lutomirski, Borislav Petkov, Brian Gerst, Frederic Weisbecker, Josh Poimboeuf, Juergen Gross, Lai Jiangshan, Macro Elver, Paolo Bonzin,i Paul McKenney, Peter Zijlstra, Vitaly Kuznetsov, and Will Deacon"
* tag 'x86-entry-2020-06-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (142 commits) x86/entry: Force rcu_irq_enter() when in idle task x86/entry: Make NMI use IDTENTRY_RAW x86/entry: Treat BUG/WARN as NMI-like entries x86/entry: Unbreak __irqentry_text_start/end magic x86/entry: __always_inline CR2 for noinstr lockdep: __always_inline more for noinstr x86/entry: Re-order #DB handler to avoid *SAN instrumentation x86/entry: __always_inline arch_atomic_* for noinstr x86/entry: __always_inline irqflags for noinstr x86/entry: __always_inline debugreg for noinstr x86/idt: Consolidate idt functionality x86/idt: Cleanup trap_init() x86/idt: Use proper constants for table size x86/idt: Add comments about early #PF handling x86/idt: Mark init only functions __init x86/entry: Rename trace_hardirqs_off_prepare() x86/entry: Clarify irq_{enter,exit}_rcu() x86/entry: Remove DBn stacks x86/entry: Remove debug IDT frobbing x86/entry: Optimize local_db_save() for virt ...
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#
f77d26a9 |
| 11-Jun-2020 |
Thomas Gleixner <tglx@linutronix.de> |
Merge branch 'x86/entry' into ras/core
to fixup conflicts in arch/x86/kernel/cpu/mce/core.c so MCE specific follow up patches can be applied without creating a horrible merge conflict afterwards.
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#
2823e83a |
| 03-Jun-2020 |
Peter Zijlstra <peterz@infradead.org> |
x86/entry: __always_inline CR2 for noinstr
vmlinux.o: warning: objtool: exc_page_fault()+0x9: call to read_cr2() leaves .noinstr.text section vmlinux.o: warning: objtool: exc_page_fault()+0x24: call
x86/entry: __always_inline CR2 for noinstr
vmlinux.o: warning: objtool: exc_page_fault()+0x9: call to read_cr2() leaves .noinstr.text section vmlinux.o: warning: objtool: exc_page_fault()+0x24: call to prefetchw() leaves .noinstr.text section vmlinux.o: warning: objtool: exc_page_fault()+0x21: call to kvm_handle_async_pf.isra.0() leaves .noinstr.text section vmlinux.o: warning: objtool: exc_nmi()+0x1cc: call to write_cr2() leaves .noinstr.text section
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20200603114052.243227806@infradead.org
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Revision tags: v5.7, v5.7-rc7, v5.7-rc6, v5.7-rc5, v5.7-rc4, v5.7-rc3, v5.7-rc2, v5.7-rc1, v5.6, v5.6-rc7, v5.6-rc6, v5.6-rc5 |
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#
410367e3 |
| 04-Mar-2020 |
Thomas Gleixner <tglx@linutronix.de> |
x86/entry: Disable interrupts for native_load_gs_index() in C code
There is absolutely no point in doing this in ASM code. Move it to C.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed
x86/entry: Disable interrupts for native_load_gs_index() in C code
There is absolutely no point in doing this in ASM code. Move it to C.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Andy Lutomirski <luto@kernel.org> Link: https://lkml.kernel.org/r/20200505134903.531534675@linutronix.de
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Revision tags: v5.6-rc4, v5.6-rc3, v5.6-rc2, v5.6-rc1, v5.5, v5.5-rc7, v5.5-rc6, v5.5-rc5, v5.5-rc4, v5.5-rc3, v5.5-rc2, v5.5-rc1 |
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#
976e3645 |
| 25-Nov-2019 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge branch 'next' into for-linus
Prepare input updates for 5.5 merge window.
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Revision tags: v5.4 |
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9f4813b5 |
| 19-Nov-2019 |
Ingo Molnar <mingo@kernel.org> |
Merge tag 'v5.4-rc8' into WIP.x86/mm, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Revision tags: v5.4-rc8 |
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ac94be49 |
| 15-Nov-2019 |
Thomas Gleixner <tglx@linutronix.de> |
Merge branch 'linus' into x86/hyperv
Pick up upstream fixes to avoid conflicts.
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Revision tags: v5.4-rc7, v5.4-rc6 |
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728d90bd |
| 27-Oct-2019 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge tag 'v5.4-rc5' into next
Sync up with mainline.
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Revision tags: v5.4-rc5, v5.4-rc4 |
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112d6212 |
| 18-Oct-2019 |
Mark Brown <broonie@kernel.org> |
Merge tag 'v5.4-rc3' into spi-5.4
Linux 5.4-rc3
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