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2016-07-15drm/i915/gen9: Add WaFbcHighMemBwCorruptionAvoidanceMika Kuoppala
Add this fbc related workaround for all gen9 Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-28-git-send-email-mika.kuoppala@intel.com (cherry picked from commit d1b4eefdea6d63aa15321f539feec298d8aefdc1) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i195/fbc: Add WaFbcNukeOnHostModifyMika Kuoppala
Bspec states that we need to set nuke on modify all to prevent screen corruption with fbc on skl and kbl. v2: proper workaround name References: HSD#2227109, HSDES#1404569388 Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-27-git-send-email-mika.kuoppala@intel.com (cherry picked from commit 031cd8c85aefad31e7af91eba7bc4735a6dfcc79) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/gen9: Add WaFbcWakeMemOnMika Kuoppala
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 <paulo.r.zanoni@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-26-git-send-email-mika.kuoppala@intel.com (cherry picked from commit 303d4ea522e8672a1b62d968a5b6764929adc292) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/gen9: Add WaFbcTurnOffFbcWatermarkMika Kuoppala
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 <paulo.r.zanoni@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-25-git-send-email-mika.kuoppala@intel.com (cherry picked from commit 0f78dee6f06a9399d4bdf79575094cc761b872ac) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/kbl: Add WaClearSlmSpaceAtContextSwitchMika Kuoppala
This workaround for bdw and chv, is also needed for kbl A0. References: HSD#1911519, BSID#569 Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-24-git-send-email-mika.kuoppala@intel.com (cherry picked from commit 066d462888514af727008a450f4078b1a23d5cbe) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/gen9: Add WaEnableChickenDCPRMika Kuoppala
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 <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-22-git-send-email-mika.kuoppala@intel.com (cherry picked from commit 590e8ff04bc0182dce97228e5e352d6413d80456) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/kbl: Add WaDisableSbeCacheDispatchPortSharingMika Kuoppala
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 <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-21-git-send-email-mika.kuoppala@intel.com (cherry picked from commit 954337aa96a31f6d4baf1e40ac219fbb1b1d92f4) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/kbl: Add WaDisableGafsUnitClkGatingMika Kuoppala
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 <ville.syrjala@linux.intel.com> Cc: Matthew Auld <matthew.william.auld@gmail.com> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-20-git-send-email-mika.kuoppala@intel.com (cherry picked from commit 4de5d7ccbccc88d2f7b1bcdc2180196ded7db8b8) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/kbl: Add WaForGAMHangMika Kuoppala
Add this workaround for A0 and B0 revisions References: HSD#2226935 Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-19-git-send-email-mika.kuoppala@intel.com (cherry picked from commit 0b2d0934edceff9905b1202d0e7e91f1b6228485) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915: Add WaInsertDummyPushConstP for bxt and kblMika Kuoppala
Add this workaround for both bxt and kbl up to until rev B0. References: HSD#2136703 Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-16-git-send-email-mika.kuoppala@intel.com (cherry picked from commit ad2bdb44b19529ba992bd0b7667e91b14fe9a9ee) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/kbl: Add WaDisableDynamicCreditSharingMika Kuoppala
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 <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-15-git-send-email-mika.kuoppala@intel.com (cherry picked from commit c0b730d572ea00d427f6112b17982c6b9d5e97bb) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/kbl: Add WaDisableGamClockGatingMika Kuoppala
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 <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-14-git-send-email-mika.kuoppala@intel.com (cherry picked from commit 8aeb7f624fbf8a68a9c67f831d4158a0f80ea920) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/gen9: Enable must set chicken bits in config0 regMika Kuoppala
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 <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-13-git-send-email-mika.kuoppala@intel.com (cherry picked from commit b033bb6d5d3a0e51d56b3ba929a8db4e18da0892) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/kbl: Add WaDisableLSQCROPERFforOCLMika Kuoppala
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 <matthew.william.auld@gmail.com> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-12-git-send-email-mika.kuoppala@intel.com (cherry picked from commit fe90581987cd5fadd2942f59f8511bcb39fdec34) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/kbl: Add WaDisableSDEUnitClockGatingMika Kuoppala
Add this workaround until upto kbl revid B0. References: HSD#1802092 Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-10-git-send-email-mika.kuoppala@intel.com (cherry picked from commit 9498dba7b4ffe40a1e2b23d7718b77e49841248f) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/kbl: Add WaDisableFenceDestinationToSLM for A0Mika Kuoppala
Add this workaround for kbl revid A0 only. v2: rebase v3: carve out a non related workaround (Chris) References: HSD#1911714 Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-9-git-send-email-mika.kuoppala@intel.com (cherry picked from commit 8401d42fd5adf709281e1700194805f393b49573) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/kbl: Add WaEnableGapsTsvCreditFixMika Kuoppala
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 <arun.siluvery@linux.intel.com> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-8-git-send-email-mika.kuoppala@intel.com (cherry picked from commit e587f6cb0af140f3c0ea794d8616eb9a29969983) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915: Mimic skl with WaForceEnableNonCoherentMika Kuoppala
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 <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-7-git-send-email-mika.kuoppala@intel.com (cherry picked from commit bbaefe72a00c93c6ec12e029019681e3f7d7de7a) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/gen9: Always apply WaForceContextSaveRestoreNonCoherentMika Kuoppala
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 <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-6-git-send-email-mika.kuoppala@intel.com (cherry picked from commit 5b0e3659296cc4a1484e60640ef10780194a195b) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/kbl: Add WaSkipStolenMemoryFirstPage for A0Mika Kuoppala
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 <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-5-git-send-email-mika.kuoppala@intel.com (cherry picked from commit 6e4f10c33a8bd0df4412bc31c0f11930e0228123) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/kbl: Add REVID macroMika Kuoppala
Add REVID macro for kbl to limit wa applicability to particular revision range. Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-4-git-send-email-mika.kuoppala@intel.com (cherry picked from commit c033a37cd42c1b5492d95bfbc8c0891088e04b57) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/kbl: Init gen9 workaroundsMika Kuoppala
Kabylake is part of gen9 family so init the generic gen9 workarounds for it. v2: rebase Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-3-git-send-email-mika.kuoppala@intel.com (cherry picked from commit e5f81d65ac5a04020d790caf63b2324730ba0277) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/skl: Add WaDisableGafsUnitClkGatingMika Kuoppala
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 <ville.syrjala@linux.intel.com> Cc: Matthew Auld <matthew.william.auld@gmail.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-2-git-send-email-mika.kuoppala@intel.com (cherry picked from commit eee8efb02a0f9284d85e6b3688f944ca765d7ad3) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/gen9: Add WaVFEStateAfterPipeControlwithMediaStateCleararun.siluvery@linux.intel.com
Kernel only need to add a register to HW whitelist, required for a preemption related issue. Reference: HSD#2131039 Reviewed-by: Jeff McGee <jeff.mcgee@intel.com> Signed-off-by: Arun Siluvery <arun.siluvery@linux.intel.com> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465203169-16591-1-git-send-email-arun.siluvery@linux.intel.com (cherry picked from commit 6bb6285582e0cf9b3a8440e0e714aae5f66d9ce2) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15drm/i915/psr: Implement PSR2 w/a for gen9Daniel Vetter
Found this while browsing Bspec. Looks like it applies to both skl and kbl. v2: Also for bxt (Art). Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Sonika Jindal <sonika.jindal@intel.com> Cc: Durgadoss R <durgadoss.r@intel.com> Cc: "Pandiyan, Dhinakaran" <dhinakaran.pandiyan@intel.com> Cc: "Runyan, Arthur J" <arthur.j.runyan@intel.com> Reviewed-by: Sonika Jindal<sonika.jindal@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1463642060-30728-1-git-send-email-daniel.vetter@ffwll.ch (cherry picked from commit dc00b6a07c2206e7b7dbcbeff856049264c40faa) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
2016-07-15s390/chsc: improve channel path descriptor determinationSebastian Ott
When we fetch channel path descriptors via chsc we use a suboptimal struct chsc_scpd and adjust that by casting the response to a generic chsc_response_struct. Simplify the code by improving struct chsc_scpd. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-07-15s390/chsc: sanitize fmt check for chp_desc determinationSebastian Ott
When fetching channel path descriptors we've only evaluated the rfmt parameter which could lead us to trigger the chsc even though the machine doesn't support the specific format or to not trigger the chsc and report a failure to userspace even though the machine would've supported it. Improve these checks and change the parameters of the in-kernel user to be less confusing. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-07-15s390/cio: make fmt1 channel path descriptor optionalSebastian Ott
Not all machines / hypervisors support the chsc commands to fetch the fmt1 descriptor. When these commands fail the channel path would currently not be available to linux. Since users of these descriptors can already deal with invalid data make fetching it optional. The only data that is mandatory for us is the fmt0 channel path descriptor. Also make the return code for missing facilities in chsc_get_channel_measurement_chars consistent to other functions. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-07-15s390/chsc: fix ioctl CHSC_INFO_CU commandSebastian Ott
Via CHSC_INFO_CU we ought to provide userspace with control unit configuration data. Due to an erroneous request code we trigger the wrong chsc command. Fix this copy and paste error. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-07-15s390/cio/device_ops: fix kernel docSebastian Ott
Fix an incorrect kernel doc comment in device_ops.c. Also provide proper function markups while at it. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-07-15x86/apic: Remove the unused struct apic::apic_id_mask fieldWei Jiangang
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 <weijg.fnst@cn.fujitsu.com> Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: boris.ostrovsky@oracle.com Cc: bsd@redhat.com Cc: david.vrabel@citrix.com Cc: jgross@suse.com Cc: konrad.wilk@oracle.com Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/1468463046-20849-1-git-send-email-weijg.fnst@cn.fujitsu.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15Merge branch 'linus' into x86/apic, to refresh the branchIngo Molnar
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15x86/tsc: Remove the unused check_tsc_disabled()Wei Jiangang
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 <weijg.fnst@cn.fujitsu.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: a.p.zijlstra@chello.nl Cc: adrian.hunter@intel.com Cc: bp@suse.de Link: http://lkml.kernel.org/r/1468570330-25810-1-git-send-email-weijg.fnst@cn.fujitsu.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15x86/syscalls: Add compat_sys_preadv64v2/compat_sys_pwritev64v2H.J. Lu
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 <hjl.tools@gmail.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/CAMe9rOovCMf-RQfx_n1U_Tu_DX1BYkjtFr%3DQ4-_PFVSj9BCzUA@mail.gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15x86/smp: Remove unnecessary initialization of thread_info::cpuAndy Lutomirski
It's statically initialized to zero -- no need to dynamically initialize it to zero as well. Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/6cf6314dce3051371a913ee19d1b88e29c68c560.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15x86/smp: Remove stack_smp_processor_id()Andy Lutomirski
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 <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/a2bf4f07fbc30fb32f9f7f3f8f94ad3580823847.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15x86/uaccess: Move thread_info::addr_limit to thread_structAndy Lutomirski
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 <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/15bee834d09402b47ac86f2feccdf6529f9bc5b0.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15x86/dumpstack: Rename thread_struct::sig_on_uaccess_error to sig_on_uaccess_errIngo Molnar
Rename it to match the thread_struct::uaccess_err pattern and also because it was too long. Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15x86/uaccess: Move thread_info::uaccess_err and ↵Andy Lutomirski
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 <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/d0ac4d01c8e4d4d756264604e47445d5acc7900e.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15x86/dumpstack: When OOPSing, rewind the stack before do_exit()Andy Lutomirski
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 <luto@kernel.org> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/32f73ceb372ec61889598da5e5b145889b9f2e19.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15x86/mm/64: In vmalloc_fault(), use CR3 instead of current->active_mmAndy Lutomirski
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 <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/4650d7674185f165ed8fdf9ac4c5c35c5c179ba8.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15x86/dumpstack/64: Handle faults when printing the "Stack: " part of an OOPSAndy Lutomirski
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 <luto@kernel.org> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/e626d47a55d7b04dcb1b4d33faa95e8505b217c8.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15x86/dumpstack: Try harder to get a call trace on stack overflowAndy Lutomirski
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 <luto@kernel.org> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/ee1690eb2715ccc5dc187fde94effa4ca0ccbbcd.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15x86/mm: Remove kernel_unmap_pages_in_pgd() and efi_cleanup_page_tables()Andy Lutomirski
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 <luto@kernel.org> Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Acked-by: Borislav Petkov <bp@suse.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/77ff20fdde3b75cd393be5559ad8218870520248.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15x86/mm/cpa: In populate_pgd(), don't set the PGD entry until it's populatedAndy Lutomirski
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 <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/bf99df27eac6835f687005364bd1fbd89130946c.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15x86/mm/hotplug: Don't remove PGD entries in remove_pagetable()Ingo Molnar
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 <mingo@kernel.org> Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Waiman Long <Waiman.Long@hp.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/064ff6c7275734537f969e876f6cd0baa954d2cc.1468527351.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15Merge branch 'x86/asm' into x86/mm, to resolve conflictsIngo Molnar
Conflicts: tools/testing/selftests/x86/Makefile Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge misc fixes from Andrew Morton: "20 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: 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 Torvalds
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. Piccoli
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 <gpiccoli@linux.vnet.ibm.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
generated by cgit (git 2.34.1) at 2025-09-17 23:33:24 +0000