linux-stable.git/arch/x86/kernel/cpu, branch v3.0 Linux kernel stable tree Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 2011-05-29T18:18:09+00:00 Linus Torvalds torvalds@linux-foundation.org 2011-05-29T18:18:09+00:00 f310642123e0d32d919c60ca3fab5acd130c4ba3 * 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6: x86 idle: deprecate mwait_idle() and "idle=mwait" cmdline param x86 idle: deprecate "no-hlt" cmdline param x86 idle APM: deprecate CONFIG_APM_CPU_IDLE x86 idle floppy: deprecate disable_hlt() x86 idle: EXPORT_SYMBOL(default_idle, pm_idle) only when APM demands it x86 idle: clarify AMD erratum 400 workaround idle governor: Avoid lock acquisition to read pm_qos before entering idle cpuidle: menu: fixed wrapping timers at 4.294 seconds 
* 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6:
  x86 idle: deprecate mwait_idle() and "idle=mwait" cmdline param
  x86 idle: deprecate "no-hlt" cmdline param
  x86 idle APM: deprecate CONFIG_APM_CPU_IDLE
  x86 idle floppy: deprecate disable_hlt()
  x86 idle: EXPORT_SYMBOL(default_idle, pm_idle) only when APM demands it
  x86 idle: clarify AMD erratum 400 workaround
  idle governor: Avoid lock acquisition to read pm_qos before entering idle
  cpuidle: menu: fixed wrapping timers at 4.294 seconds
x86 idle: deprecate "no-hlt" cmdline param 2011-05-29T07:39:16+00:00 Len Brown len.brown@intel.com 2011-04-01T19:41:17+00:00 cdaab4a0d330f70c0e5ad8c3f7c65c2e375ea180 We'd rather that modern machines not check if HLT works on every entry into idle, for the benefit of machines that had marginal electricals 15-years ago. If those machines are still running the upstream kernel, they can use "idle=poll". The only difference will be that they'll now invoke HLT in machine_hlt(). cc: x86@kernel.org # .39.x Signed-off-by: Len Brown <len.brown@intel.com> 
We'd rather that modern machines not check if HLT works on
every entry into idle, for the benefit of machines that had
marginal electricals 15-years ago.  If those machines are still running
the upstream kernel, they can use "idle=poll".  The only difference
will be that they'll now invoke HLT in machine_hlt().

cc: x86@kernel.org # .39.x
Signed-off-by: Len Brown <len.brown@intel.com>
x86 idle: clarify AMD erratum 400 workaround 2011-05-29T07:38:57+00:00 Len Brown len.brown@intel.com 2011-04-01T20:59:53+00:00 02c68a02018669d1817c43c42de800975cbec467 The workaround for AMD erratum 400 uses the term "c1e" falsely suggesting: 1. Intel C1E is somehow involved 2. All AMD processors with C1E are involved Use the string "amd_c1e" instead of simply "c1e" to clarify that this workaround is specific to AMD's version of C1E. Use the string "e400" to clarify that the workaround is specific to AMD processors with Erratum 400. This patch is text-substitution only, with no functional change. cc: x86@kernel.org Acked-by: Borislav Petkov <borislav.petkov@amd.com> Signed-off-by: Len Brown <len.brown@intel.com> 
The workaround for AMD erratum 400 uses the term "c1e" falsely suggesting:
1. Intel C1E is somehow involved
2. All AMD processors with C1E are involved

Use the string "amd_c1e" instead of simply "c1e" to clarify that
this workaround is specific to AMD's version of C1E.
Use the string "e400" to clarify that the workaround is specific
to AMD processors with Erratum 400.

This patch is text-substitution only, with no functional change.

cc: x86@kernel.org
Acked-by: Borislav Petkov <borislav.petkov@amd.com>
Signed-off-by: Len Brown <len.brown@intel.com>
x86, amd: Do not enable ARAT feature on AMD processors below family 0x12 2011-05-26T17:38:30+00:00 Boris Ostrovsky ostr@amd64.org 2011-05-26T15:19:52+00:00 e9cdd343a5e42c43bcda01e609fa23089e026470 Commit b87cf80af3ba4b4c008b4face3c68d604e1715c6 added support for ARAT (Always Running APIC timer) on AMD processors that are not affected by erratum 400. This erratum is present on certain processor families and prevents APIC timer from waking up the CPU when it is in a deep C state, including C1E state. Determining whether a processor is affected by this erratum may have some corner cases and handling these cases is somewhat complicated. In the interest of simplicity we won't claim ARAT support on processor families below 0x12 and will go back to broadcasting timer when going idle. Signed-off-by: Boris Ostrovsky <ostr@amd64.org> Link: http://lkml.kernel.org/r/1306423192-19774-1-git-send-email-ostr@amd64.org Tested-by: Boris Petkov <borislav.petkov@amd.com> Cc: Hans Rosenfeld <Hans.Rosenfeld@amd.com> Cc: Andreas Herrmann <Andreas.Herrmann3@amd.com> Cc: Chuck Ebbert <cebbert@redhat.com> Cc: stable@kernel.org # 32.x, 38.x, 39.x Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> 
Commit b87cf80af3ba4b4c008b4face3c68d604e1715c6 added support for
ARAT (Always Running APIC timer) on AMD processors that are not
affected by erratum 400. This erratum is present on certain processor
families and prevents APIC timer from waking up the CPU when it
is in a deep C state, including C1E state.

Determining whether a processor is affected by this erratum may
have some corner cases and handling these cases is somewhat
complicated. In the interest of simplicity we won't claim ARAT
support on processor families below 0x12 and will go back to
broadcasting timer when going idle.

Signed-off-by: Boris Ostrovsky <ostr@amd64.org>
Link: http://lkml.kernel.org/r/1306423192-19774-1-git-send-email-ostr@amd64.org
Tested-by: Boris Petkov <borislav.petkov@amd.com>
Cc: Hans Rosenfeld <Hans.Rosenfeld@amd.com>
Cc: Andreas Herrmann <Andreas.Herrmann3@amd.com>
Cc: Chuck Ebbert <cebbert@redhat.com>
Cc: stable@kernel.org # 32.x, 38.x, 39.x
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
x86: Remove unnecessary check in detect_ht() 2011-05-25T21:01:08+00:00 Nikhil P Rao nikhil.rao@intel.com 2011-05-25T17:18:41+00:00 8b27f2ff7a24f0735c96055e676872f05398d99b This patch removes a check that causes incorrect scheduler domain setup (SMP instead of SMT) and bootlog warning messages when cpuid extensions for topology enumeration are not supported and the number of processors reported to the OS is smaller than smp_num_siblings. Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Nikhil P Rao <nikhil.rao@intel.com> Link: http://lkml.kernel.org/r/1306343921.19325.1.camel@fedora13 Signed-off-by: Ingo Molnar <mingo@elte.hu> 
This patch removes a check that causes incorrect scheduler
domain setup (SMP instead of SMT) and bootlog warning messages
when cpuid extensions for topology enumeration are not supported
and the number of processors reported to the OS is smaller than
smp_num_siblings.

Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Nikhil P Rao <nikhil.rao@intel.com>
Link: http://lkml.kernel.org/r/1306343921.19325.1.camel@fedora13
Signed-off-by: Ingo Molnar <mingo@elte.hu>
x86, SMEP: Fix section mismatch warnings 2011-05-21T10:46:24+00:00 Fenghua Yu fenghua.yu@intel.com 2011-05-20T22:33:17+00:00 1d487624fcc17a40aa67acaa9e8f3815fb7cd0f0 Fix these kernel compilation warnings: WARNING: arch/x86/built-in.o(.cpuinit.text+0x1e07): Section mismatch ... WARNING: arch/x86/built-in.o(.cpuinit.text+0x1b10): Section mismatch ... introduced by: de5397ad5b9a: x86, cpu: Enable/disable Supervisor Mode Execution Protection Change disable_smep from __initdata to __cpuinitdata. Change setup_smep() from __init to __cpuinit. Reported-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Cc: Asit K Mallick <asit.k.mallick@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/1305930797-11409-1-git-send-email-fenghua.yu@intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu> 
Fix these kernel compilation warnings:

 WARNING: arch/x86/built-in.o(.cpuinit.text+0x1e07): Section mismatch ...
 WARNING: arch/x86/built-in.o(.cpuinit.text+0x1b10): Section mismatch ...

introduced by:

  de5397ad5b9a: x86, cpu: Enable/disable Supervisor Mode Execution Protection

Change disable_smep from __initdata to __cpuinitdata.
Change setup_smep() from __init to __cpuinit.

Reported-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Cc: Asit K Mallick <asit.k.mallick@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1305930797-11409-1-git-send-email-fenghua.yu@intel.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
x86, amd: Use _safe() msr access for GartTlbWlk disable code 2011-05-20T10:57:18+00:00 Roedel, Joerg Joerg.Roedel@amd.com 2011-05-19T09:13:39+00:00 d47cc0db8fd6011de2248df505fc34990b7451bf The workaround for Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=33012 introduced a read and a write to the MC4 mask msr. Unfortunatly this MSR is not emulated by the KVM hypervisor so that the kernel will get a #GP and crashes when applying this workaround when running inside KVM. This issue was reported as: https://bugzilla.kernel.org/show_bug.cgi?id=35132 and is fixed with this patch. The change just let the kernel ignore any #GP it gets while accessing this MSR by using the _safe msr access methods. Reported-by: Török Edwin <edwintorok@gmail.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Maciej Rutecki <maciej.rutecki@gmail.com> Cc: Avi Kivity <avi@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@kernel.org> # .39.x Signed-off-by: Ingo Molnar <mingo@elte.hu> 
The workaround for Bugzilla:

	https://bugzilla.kernel.org/show_bug.cgi?id=33012

introduced a read and a write to the MC4 mask msr.

Unfortunatly this MSR is not emulated by the KVM hypervisor
so that the kernel will get a #GP and crashes when applying
this workaround when running inside KVM.

This issue was reported as:

	https://bugzilla.kernel.org/show_bug.cgi?id=35132

and is fixed with this patch. The change just let the kernel
ignore any #GP it gets while accessing this MSR by using the
_safe msr access methods.

Reported-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Maciej Rutecki <maciej.rutecki@gmail.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: <stable@kernel.org> # .39.x
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Merge branch 'x86-smep-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-05-20T01:10:17+00:00 Linus Torvalds torvalds@linux-foundation.org 2011-05-20T01:10:17+00:00 5765040ebfc9a28d9dcfaaaaf3d25840d922de96 * 'x86-smep-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, cpu: Enable/disable Supervisor Mode Execution Protection x86, cpu: Add SMEP CPU feature in CR4 x86, cpufeature: Add cpufeature flag for SMEP 
* 'x86-smep-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, cpu: Enable/disable Supervisor Mode Execution Protection
  x86, cpu: Add SMEP CPU feature in CR4
  x86, cpufeature: Add cpufeature flag for SMEP
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-05-20T01:07:31+00:00 Linus Torvalds torvalds@linux-foundation.org 2011-05-20T01:07:31+00:00 13588209aa90d9c8e502750fc86160314555612f * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (50 commits) x86, mm: Allow ZONE_DMA to be configurable x86, NUMA: Trim numa meminfo with max_pfn in a separate loop x86, NUMA: Rename setup_node_bootmem() to setup_node_data() x86, NUMA: Enable emulation on 32bit too x86, NUMA: Enable CONFIG_AMD_NUMA on 32bit too x86, NUMA: Rename amdtopology_64.c to amdtopology.c x86, NUMA: Make numa_init_array() static x86, NUMA: Make 32bit use common NUMA init path x86, NUMA: Initialize and use remap allocator from setup_node_bootmem() x86-32, NUMA: Add @start and @end to init_alloc_remap() x86, NUMA: Remove long 64bit assumption from numa.c x86, NUMA: Enable build of generic NUMA init code on 32bit x86, NUMA: Move NUMA init logic from numa_64.c to numa.c x86-32, NUMA: Update numaq to use new NUMA init protocol x86-32, NUMA: Replace srat_32.c with srat.c x86-32, NUMA: implement temporary NUMA init shims x86, NUMA: Move numa_nodes_parsed to numa.[hc] x86-32, NUMA: Move get_memcfg_numa() into numa_32.c x86, NUMA: make srat.c 32bit safe x86, NUMA: rename srat_64.c to srat.c ... 
* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (50 commits)
  x86, mm: Allow ZONE_DMA to be configurable
  x86, NUMA: Trim numa meminfo with max_pfn in a separate loop
  x86, NUMA: Rename setup_node_bootmem() to setup_node_data()
  x86, NUMA: Enable emulation on 32bit too
  x86, NUMA: Enable CONFIG_AMD_NUMA on 32bit too
  x86, NUMA: Rename amdtopology_64.c to amdtopology.c
  x86, NUMA: Make numa_init_array() static
  x86, NUMA: Make 32bit use common NUMA init path
  x86, NUMA: Initialize and use remap allocator from setup_node_bootmem()
  x86-32, NUMA: Add @start and @end to init_alloc_remap()
  x86, NUMA: Remove long 64bit assumption from numa.c
  x86, NUMA: Enable build of generic NUMA init code on 32bit
  x86, NUMA: Move NUMA init logic from numa_64.c to numa.c
  x86-32, NUMA: Update numaq to use new NUMA init protocol
  x86-32, NUMA: Replace srat_32.c with srat.c
  x86-32, NUMA: implement temporary NUMA init shims
  x86, NUMA: Move numa_nodes_parsed to numa.[hc]
  x86-32, NUMA: Move get_memcfg_numa() into numa_32.c
  x86, NUMA: make srat.c 32bit safe
  x86, NUMA: rename srat_64.c to srat.c
  ...
Merge branches 'x86-efi-for-linus', 'x86-gart-for-linus', 'x86-irq-for-linus' and 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-05-20T01:03:56+00:00 Linus Torvalds torvalds@linux-foundation.org 2011-05-20T01:03:56+00:00 ac2941f59a38eeb535e1f227a8f90d7fe6b7828b * 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, efi: Ensure that the entirity of a region is mapped x86, efi: Pass a minimal map to SetVirtualAddressMap() x86, efi: Merge contiguous memory regions of the same type and attribute x86, efi: Consolidate EFI nx control x86, efi: Remove virtual-mode SetVirtualAddressMap call * 'x86-gart-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, gart: Don't enforce GART aperture lower-bound by alignment * 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Don't unmask disabled irqs when migrating them x86: Skip migrating IRQF_PER_CPU irqs in fixup_irqs() * 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, mce: Drop the default decoding notifier x86, MCE: Do not taint when handling correctable errors 
* 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, efi: Ensure that the entirity of a region is mapped
  x86, efi: Pass a minimal map to SetVirtualAddressMap()
  x86, efi: Merge contiguous memory regions of the same type and attribute
  x86, efi: Consolidate EFI nx control
  x86, efi: Remove virtual-mode SetVirtualAddressMap call

* 'x86-gart-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, gart: Don't enforce GART aperture lower-bound by alignment

* 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Don't unmask disabled irqs when migrating them
  x86: Skip migrating IRQF_PER_CPU irqs in fixup_irqs()

* 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, mce: Drop the default decoding notifier
  x86, MCE: Do not taint when handling correctable errors