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2016-07-15drm/i915/gen9: Add WaFbcWakeMemOnMika Kuoppala2-2/+5
Set bit 8 in 0x43224 to prevent screen corruption and system hangs on high memory bandwidth conditions. The same wa also suggest setting bit 31 on ARB_CTL. According to another workaround we gain better idle power savings when FBC is enabled. v2: use correct workaround name v3: split out overlapping wa for corruption avoidance (Ville) References: HSD#2137218, HSD#2227171, HSD#2136579, BSID#883 Cc: Paulo Zanoni <[email protected]> Cc: Ville Syrjälä <[email protected]> Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Ville Syrjälä <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit 303d4ea522e8672a1b62d968a5b6764929adc292) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/gen9: Add WaFbcTurnOffFbcWatermarkMika Kuoppala1-0/+4
According to bspec this prevents screen corruption when fbc is used. v2: This workaround has a name, use it (Ville) v3: remove bogus gen check on ilk/vlv wm path (Ville) References: HSD#2135555, HSD#2137270, BSID#562 Cc: Paulo Zanoni <[email protected]> Cc: Ville Syrjälä <[email protected]> Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Ville Syrjälä <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit 0f78dee6f06a9399d4bdf79575094cc761b872ac) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/kbl: Add WaClearSlmSpaceAtContextSwitchMika Kuoppala1-0/+17
This workaround for bdw and chv, is also needed for kbl A0. References: HSD#1911519, BSID#569 Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit 066d462888514af727008a450f4078b1a23d5cbe) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/gen9: Add WaEnableChickenDCPRMika Kuoppala2-0/+7
Workaround for display underrun issues with Y & Yf Tiling. Set this on all gen9 as stated by bspec. v2: proper workaround name References: HSD#2136383, BSID#857 Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit 590e8ff04bc0182dce97228e5e352d6413d80456) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/kbl: Add WaDisableSbeCacheDispatchPortSharingMika Kuoppala1-0/+5
This is needed for all kbl revision. v2: Don't add revid checks to generic gen9 init (Arun) References: HSD#2135593 Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit 954337aa96a31f6d4baf1e40ac219fbb1b1d92f4) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/kbl: Add WaDisableGafsUnitClkGatingMika Kuoppala1-0/+3
We need to disable clock gating in this unit to work around hardware issue causing possible corruption/hang. v2: name the bit (Ville) v3: leave the fix enabled for 2227050 and set correct bit (Matthew) v4: Split out the skl part in separate commit for easier backport References: HSD#2227156, HSD#2227050 Cc: Ville Syrjälä <[email protected]> Cc: Matthew Auld <[email protected]> Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit 4de5d7ccbccc88d2f7b1bcdc2180196ded7db8b8) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/kbl: Add WaForGAMHangMika Kuoppala1-2/+34
Add this workaround for A0 and B0 revisions References: HSD#2226935 Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit 0b2d0934edceff9905b1202d0e7e91f1b6228485) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915: Add WaInsertDummyPushConstP for bxt and kblMika Kuoppala2-0/+11
Add this workaround for both bxt and kbl up to until rev B0. References: HSD#2136703 Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit ad2bdb44b19529ba992bd0b7667e91b14fe9a9ee) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/kbl: Add WaDisableDynamicCreditSharingMika Kuoppala2-0/+8
Bspec states that we need to turn off dynamic credit sharing on kbl revid a0 and b0. This happens by writing bit 28 on 0x4ab8. References: HSD#2225601, HSD#2226938, HSD#2225763 Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit c0b730d572ea00d427f6112b17982c6b9d5e97bb) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/kbl: Add WaDisableGamClockGatingMika Kuoppala2-0/+6
According to bspec we need to disable gam unit clock gating on on kbl revids A0 and B0. References: HSD#2226858, HSD#1944358 Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit 8aeb7f624fbf8a68a9c67f831d4158a0f80ea920) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/gen9: Enable must set chicken bits in config0 regMika Kuoppala2-10/+17
The bspec states that these must be set in CONFIG0 for all gen9. v2: rebase v3: fix spacing (Matthew) References: HSD#2134995 Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit b033bb6d5d3a0e51d56b3ba929a8db4e18da0892) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/kbl: Add WaDisableLSQCROPERFforOCLMika Kuoppala3-2/+20
Extend the scope of this workaround, already used in skl, to also take effect in kbl. v2: Fix KBL_REVID_E0 (Matthew) References: HSD#2132677 Cc: Matthew Auld <[email protected]> Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit fe90581987cd5fadd2942f59f8511bcb39fdec34) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/kbl: Add WaDisableSDEUnitClockGatingMika Kuoppala1-2/+16
Add this workaround until upto kbl revid B0. References: HSD#1802092 Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit 9498dba7b4ffe40a1e2b23d7718b77e49841248f) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/kbl: Add WaDisableFenceDestinationToSLM for A0Mika Kuoppala1-0/+5
Add this workaround for kbl revid A0 only. v2: rebase v3: carve out a non related workaround (Chris) References: HSD#1911714 Cc: Chris Wilson <[email protected]> Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit 8401d42fd5adf709281e1700194805f393b49573) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/kbl: Add WaEnableGapsTsvCreditFixMika Kuoppala1-0/+5
We need this crucial workaround from skl also to all kbl revisions. Lack of it was causing system hangs on skl enabling so this is a must have. v2: Don't add revid checks to gen9 init workarounds (Arun) References: HSD#2126660 Cc: Arun Siluvery <[email protected]> Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit e587f6cb0af140f3c0ea794d8616eb9a29969983) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915: Mimic skl with WaForceEnableNonCoherentMika Kuoppala1-16/+21
Past evidence with system hangs and hsds tie WaForceEnableNonCoherent and WaDisableHDCInvalidation to WaForceContextSaveRestoreNonCoherent. Documentation states that WaForceContextSaveRestoreNonCoherent would not be needed on skl past E0 but evidence proved otherwise. See commit <510650e8b2ab> ("drm/i915/skl: Fix spurious gpu hang with gt3/gt4 revs"). In this scope consider kbl to be skl with a bigger revision than E0 so play it safe and bind these two workarounds to the WaForceContextSaveRestoreNonCoherent, and apply to all gen9. v2: fix comment (Matthew) References: HSD#2134449, HSD#2131413 Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit bbaefe72a00c93c6ec12e029019681e3f7d7de7a) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/gen9: Always apply WaForceContextSaveRestoreNonCoherentMika Kuoppala1-7/+4
The revision id range for this workaround has changed. So apply it to all revids on all gen9. References: HSD#2134449 Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit 5b0e3659296cc4a1484e60640ef10780194a195b) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/kbl: Add WaSkipStolenMemoryFirstPage for A0Mika Kuoppala1-2/+4
We need this for kbl a0 boards. Note that this should be also for bxt A0 but we omit that on purpose as bxt A0's are out of fashion already. References: HSD#1912158, HSD#4393097 Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit 6e4f10c33a8bd0df4412bc31c0f11930e0228123) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/kbl: Add REVID macroMika Kuoppala1-0/+6
Add REVID macro for kbl to limit wa applicability to particular revision range. Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit c033a37cd42c1b5492d95bfbc8c0891088e04b57) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/kbl: Init gen9 workaroundsMika Kuoppala1-16/+32
Kabylake is part of gen9 family so init the generic gen9 workarounds for it. v2: rebase Signed-off-by: Mika Kuoppala <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit e5f81d65ac5a04020d790caf63b2324730ba0277) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/skl: Add WaDisableGafsUnitClkGatingMika Kuoppala2-0/+4
We need to disable clock gating in this unit to work around hardware issue causing possible corruption/hang. v2: name the bit (Ville) v3: leave the fix enabled for 2227050 and set correct bit (Matthew) References: HSD#2227156, HSD#2227050 Cc: Ville Syrjälä <[email protected]> Cc: Matthew Auld <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Signed-off-by: Mika Kuoppala <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit eee8efb02a0f9284d85e6b3688f944ca765d7ad3) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/gen9: Add WaVFEStateAfterPipeControlwithMediaStateClear[email protected]2-0/+6
Kernel only need to add a register to HW whitelist, required for a preemption related issue. Reference: HSD#2131039 Reviewed-by: Jeff McGee <[email protected]> Signed-off-by: Arun Siluvery <[email protected]> Signed-off-by: Tvrtko Ursulin <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit 6bb6285582e0cf9b3a8440e0e714aae5f66d9ce2) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15drm/i915/psr: Implement PSR2 w/a for gen9Daniel Vetter2-2/+16
Found this while browsing Bspec. Looks like it applies to both skl and kbl. v2: Also for bxt (Art). Cc: Rodrigo Vivi <[email protected]> Cc: Sonika Jindal <[email protected]> Cc: Durgadoss R <[email protected]> Cc: "Pandiyan, Dhinakaran" <[email protected]> Cc: "Runyan, Arthur J" <[email protected]> Reviewed-by: Sonika Jindal<[email protected]> Signed-off-by: Daniel Vetter <[email protected]> Link: http://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit dc00b6a07c2206e7b7dbcbeff856049264c40faa) Signed-off-by: Mika Kuoppala <[email protected]>
2016-07-15x86/apic: Remove the unused struct apic::apic_id_mask fieldWei Jiangang10-12/+0
The only user verify_local_APIC() had been removed by commit: 4399c03c6780 ("x86/apic: Remove verify_local_APIC()") ... so there is no need to keep it. Signed-off-by: Wei Jiangang <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15Merge branch 'linus' into x86/apic, to refresh the branchIngo Molnar1116-6735/+10896
Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15x86/tsc: Remove the unused check_tsc_disabled()Wei Jiangang2-7/+0
check_tsc_disabled() was introduced by commit: c73deb6aecda ("perf/x86: Add ability to calculate TSC from perf sample timestamps") The only caller was arch_perf_update_userpage(), which had been refactored by commit: d8b11a0cbd1c ("perf/x86: Clean up cap_user_time* setting") ... so no need keep and export it any more. Signed-off-by: Wei Jiangang <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15x86/syscalls: Add compat_sys_preadv64v2/compat_sys_pwritev64v2H.J. Lu3-2/+22
Don't use the same syscall numbers for 2 different syscalls: 534 x32 preadv compat_sys_preadv64 535 x32 pwritev compat_sys_pwritev64 534 x32 preadv2 compat_sys_preadv2 535 x32 pwritev2 compat_sys_pwritev2 Add compat_sys_preadv64v2() and compat_sys_pwritev64v2() so that 64-bit offset is passed in one 64-bit register on x32, similar to compat_sys_preadv64() and compat_sys_pwritev64(). Signed-off-by: H.J. Lu <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/CAMe9rOovCMf-RQfx_n1U_Tu_DX1BYkjtFr%[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15x86/smp: Remove unnecessary initialization of thread_info::cpuAndy Lutomirski1-1/+0
It's statically initialized to zero -- no need to dynamically initialize it to zero as well. Signed-off-by: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/6cf6314dce3051371a913ee19d1b88e29c68c560.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15x86/smp: Remove stack_smp_processor_id()Andy Lutomirski3-8/+1
It serves no purpose -- raw_smp_processor_id() works fine. This change will be needed to move thread_info off the stack. Signed-off-by: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/a2bf4f07fbc30fb32f9f7f3f8f94ad3580823847.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15x86/uaccess: Move thread_info::addr_limit to thread_structAndy Lutomirski12-42/+40
struct thread_info is a legacy mess. To prepare for its partial removal, move thread_info::addr_limit out. As an added benefit, this way is simpler. Signed-off-by: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/15bee834d09402b47ac86f2feccdf6529f9bc5b0.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15x86/dumpstack: Rename thread_struct::sig_on_uaccess_error to sig_on_uaccess_errIngo Molnar3-7/+7
Rename it to match the thread_struct::uaccess_err pattern and also because it was too long. Cc: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15x86/uaccess: Move thread_info::uaccess_err and ↵Andy Lutomirski6-9/+10
thread_info::sig_on_uaccess_err to thread_struct struct thread_info is a legacy mess. To prepare for its partial removal, move the uaccess control fields out -- they're straightforward. Signed-off-by: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/d0ac4d01c8e4d4d756264604e47445d5acc7900e.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15x86/dumpstack: When OOPSing, rewind the stack before do_exit()Andy Lutomirski3-1/+31
If we call do_exit() with a clean stack, we greatly reduce the risk of recursive oopses due to stack overflow in do_exit, and we allow do_exit to work even if we OOPS from an IST stack. The latter gives us a much better chance of surviving long enough after we detect a stack overflow to write out our logs. Signed-off-by: Andy Lutomirski <[email protected]> Reviewed-by: Josh Poimboeuf <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/32f73ceb372ec61889598da5e5b145889b9f2e19.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15x86/mm/64: In vmalloc_fault(), use CR3 instead of current->active_mmAndy Lutomirski1-1/+1
If we get a vmalloc fault while current->active_mm->pgd doesn't match CR3, we'll crash without this change. I've seen this failure mode on heavily instrumented kernels with virtually mapped stacks. Signed-off-by: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/4650d7674185f165ed8fdf9ac4c5c35c5c179ba8.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15x86/dumpstack/64: Handle faults when printing the "Stack: " part of an OOPSAndy Lutomirski1-2/+10
If we overflow the stack into a guard page, we'll recursively fault when trying to dump the contents of the guard page. Use probe_kernel_address() so we can recover if this happens. Signed-off-by: Andy Lutomirski <[email protected]> Reviewed-by: Josh Poimboeuf <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/e626d47a55d7b04dcb1b4d33faa95e8505b217c8.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15x86/dumpstack: Try harder to get a call trace on stack overflowAndy Lutomirski1-1/+9
If we overflow the stack, print_context_stack() will abort. Detect this case and rewind back into the valid part of the stack so that we can trace it. Signed-off-by: Andy Lutomirski <[email protected]> Reviewed-by: Josh Poimboeuf <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/ee1690eb2715ccc5dc187fde94effa4ca0ccbbcd.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15x86/mm: Remove kernel_unmap_pages_in_pgd() and efi_cleanup_page_tables()Andy Lutomirski6-41/+0
kernel_unmap_pages_in_pgd() is dangerous: if a PGD entry in init_mm.pgd were to be cleared, callers would need to ensure that the pgd entry hadn't been propagated to any other pgd. Its only caller was efi_cleanup_page_tables(), and that, in turn, was unused, so just delete both functions. This leaves a couple of other helpers unused, so delete them, too. Signed-off-by: Andy Lutomirski <[email protected]> Reviewed-by: Matt Fleming <[email protected]> Acked-by: Borislav Petkov <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/77ff20fdde3b75cd393be5559ad8218870520248.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15x86/mm/cpa: In populate_pgd(), don't set the PGD entry until it's populatedAndy Lutomirski1-3/+6
This avoids pointless races in which another CPU or task might see a partially populated global PGD entry. These races should normally be harmless, but, if another CPU propagates the entry via vmalloc_fault() and then populate_pgd() fails (due to memory allocation failure, for example), this prevents a use-after-free of the PGD entry. Signed-off-by: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/bf99df27eac6835f687005364bd1fbd89130946c.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15x86/mm/hotplug: Don't remove PGD entries in remove_pagetable()Ingo Molnar1-27/+0
So when memory hotplug removes a piece of physical memory from pagetable mappings, it also frees the underlying PGD entry. This complicates PGD management, so don't do this. We can keep the PGD mapped and the PUD table all clear - it's only a single 4K page per 512 GB of memory hotplugged. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Andy Lutomirski <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Waiman Long <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/064ff6c7275734537f969e876f6cd0baa954d2cc.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15Merge branch 'x86/asm' into x86/mm, to resolve conflictsIngo Molnar162-817/+3790
Conflicts: tools/testing/selftests/x86/Makefile Signed-off-by: Ingo Molnar <[email protected]>
2016-07-15Merge branch 'akpm' (patches from Andrew)Linus Torvalds22-217/+72
Merge misc fixes from Andrew Morton: "20 fixes" * emailed patches from Andrew Morton <[email protected]>: m32r: fix build warning about putc mm: workingset: printk missing log level, use pr_info() mm: thp: refix false positive BUG in page_move_anon_rmap() mm: rmap: call page_check_address() with sync enabled to avoid racy check mm: thp: move pmd check inside ptl for freeze_page() vmlinux.lds: account for destructor sections gcov: add support for gcc version >= 6 mm, meminit: ensure node is online before checking whether pages are uninitialised mm, meminit: always return a valid node from early_pfn_to_nid kasan/quarantine: fix bugs on qlist_move_cache() uapi: export lirc.h header madvise_free, thp: fix madvise_free_huge_pmd return value after splitting Revert "scripts/gdb: add documentation example for radix tree" Revert "scripts/gdb: add a Radix Tree Parser" scripts/gdb: Perform path expansion to lx-symbol's arguments scripts/gdb: add constants.py to .gitignore scripts/gdb: rebuild constants.py on dependancy change scripts/gdb: silence 'nothing to do' message kasan: add newline to messages mm, compaction: prevent VM_BUG_ON when terminating freeing scanner
2016-07-15Merge tag 'for-linus' of ↵Linus Torvalds5-29/+18
git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma Pull rdma fixes from Doug Ledford: "Round three of 4.7 rc fixes: - two fixes for hfi1 - two fixes for i40iw - one omission correction in the port table counter arrays" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: i40iw: Enable remote access rights for stag allocation i40iw: do not print unitialized variables in error message IB core: Add port_xmit_wait counter IB/hfi1: Fix sleep inside atomic issue in init_asic_data IB/hfi1: Correct issues with sc5 computation
2016-07-14i40e: use valid online CPU on q_vector initializationGuilherme G. Piccoli1-5/+11
Currently, the q_vector initialization routine sets the affinity_mask of a q_vector based on v_idx value. Meaning a loop iterates on v_idx, which is an incremental value, and the cpumask is created based on this value. This is a problem in systems with multiple logical CPUs per core (like in SMT scenarios). If we disable some logical CPUs, by turning SMT off for example, we will end up with a sparse cpu_online_mask, i.e., only the first CPU in a core is online, and incremental filling in q_vector cpumask might lead to multiple offline CPUs being assigned to q_vectors. Example: if we have a system with 8 cores each one containing 8 logical CPUs (SMT == 8 in this case), we have 64 CPUs in total. But if SMT is disabled, only the 1st CPU in each core remains online, so the cpu_online_mask in this case would have only 8 bits set, in a sparse way. In general case, when SMT is off the cpu_online_mask has only C bits set: 0, 1*N, 2*N, ..., C*(N-1) where C == # of cores; N == # of logical CPUs per core. In our example, only bits 0, 8, 16, 24, 32, 40, 48, 56 would be set. This patch changes the way q_vector's affinity_mask is created: it iterates on v_idx, but consumes the CPU index from the cpu_online_mask instead of just using the v_idx incremental value. No functional changes were introduced. Signed-off-by: Guilherme G Piccoli <[email protected]> Tested-by: Andrew Bowers <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2016-07-15Merge branch 'i2c/for-current' of ↵Linus Torvalds4-5/+5
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c fixes from Wolfram Sang: "Four driver bugfixes for the I2C subsystem" * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: mux: reg: wrong condition checked for of_address_to_resource return value i2c: tegra: Correct error path in probe i2c: remove __init from i2c_register_board_info() i2c: qup: Fix wrong value of index variable
2016-07-14ixgbe: napi_poll must return the work donePaolo Abeni1-1/+1
Currently the function ixgbe_poll() returns 0 when it clean completely the rx rings, but this foul budget accounting in core code. Fix this returning the actual work done, capped to weight - 1, since the core doesn't allow to return the full budget when the driver modifies the napi status Signed-off-by: Paolo Abeni <[email protected]> Reviewed-by: Venkatesh Srinivas <[email protected]> Tested-by: Andrew Bowers <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2016-07-14i40e: enable VSI broadcast promiscuous mode instead of adding broadcast filterKiran Patil1-12/+20
This patch sets VSI broadcast promiscuous mode during VSI add sequence and prevents adding MAC filter if specified MAC address is broadcast. Change-ID: Ia62251fca095bc449d0497fc44bec3a5a0136773 Signed-off-by: Kiran Patil <[email protected]> Tested-by: Andrew Bowers <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2016-07-14i40e/i40evf: Fix i40e_rx_checksumAlexander Duyck2-26/+34
There are a couple of issues I found in i40e_rx_checksum while doing some recent testing. As a result I have found the Rx checksum logic is pretty much broken and returning that the checksum is valid for tunnels in cases where it is not. First the inner types are not the correct values to use to test for if a tunnel is present or not. In addition the inner protocol types are not a bitmask as such performing an OR of the values doesn't make sense. I have instead changed the code so that the inner protocol types are used to determine if we report CHECKSUM_UNNECESSARY or not. For anything that does not end in UDP, TCP, or SCTP it doesn't make much sense to report a checksum offload since it won't contain a checksum anyway. This leaves us with the need to set the csum_level based on some value. For that purpose I am using the tunnel_type field. If the tunnel type is GRENAT or greater then this means we have a GRE or UDP tunnel with an inner header. In the case of GRE or UDP we will have a possible checksum present so for this reason it should be safe to set the csum_level to 1 to indicate that we are reporting the state of the inner header. Signed-off-by: Alexander Duyck <[email protected]> Tested-by: Andrew Bowers <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2016-07-15Merge tag 'drm-fixes-for-v4.7-rc8-vmware' of ↵Linus Torvalds9-39/+88
git://people.freedesktop.org/~airlied/linux Pull drm vmware fixes from Dave Airlie: "These are some fixes for the vmware graphics driver, that fix some black screen issues on at least Ubuntu 16.04, I think VMware would like to get these in so stable can pick them up ASAP" * tag 'drm-fixes-for-v4.7-rc8-vmware' of git://people.freedesktop.org/~airlied/linux: drm/vmwgfx: Fix error paths when mapping framebuffer drm/vmwgfx: Fix corner case screen target management drm/vmwgfx: Delay pinning fbdev framebuffer until after mode set drm/vmwgfx: Check pin count before attempting to move a buffer drm/ttm: Make ttm_bo_mem_compat available drm/vmwgfx: Add an option to change assumed FB bpp drm/vmwgfx: Work around mode set failure in 2D VMs drm/vmwgfx: Add a check to handle host message failure
2016-07-15Merge tag 'drm-fixes-for-v4.7-rc8' of ↵Linus Torvalds5-1/+36
git://people.freedesktop.org/~airlied/linux Pull drm fixes from Dave Airlie: "These are just some i915 and amdgpu fixes that shows up, the amdgpu ones are polaris fixes, and the i915 one is a major regression fix" * tag 'drm-fixes-for-v4.7-rc8' of git://people.freedesktop.org/~airlied/linux: drm/amdgpu: fix power distribution issue for Polaris10 XT drm/amdgpu: Add a missing register to Polaris golden setting drm/i915: Ignore panel type from OpRegion on SKL drm/i915: Update ifdeffery for mutex->owner
2016-07-15Merge branch 'sched-urgent-for-linus' of ↵Linus Torvalds3-7/+9
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler fix from Ingo Molnar: "Fix a CPU hotplug related corruption of the load average that got introduced in this merge window" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/core: Correct off by one bug in load migration calculation
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