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2010-01-11Revert "x86, apic: Use logical flat on intel with <= 8 logical cpus"Ananth N Mavinakayanahalli
Revert commit 2fbd07a5f5d1295fa9b0c0564ec27da7c276a75a, as this commit breaks an IBM platform with quad-core Xeon cpu's. According to Suresh, this might be an IBM platform issue, as on other Intel platforms with <= 8 logical cpu's, logical flat mode works fine irespective of physical apic id values (inline with the xapic architecture). Revert this for now because of the IBM platform breakage. Another version will be re-submitted after the complete analysis. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-01-11core, x86: make LIST_POISON less deadlyAvi Kivity
The list macros use LIST_POISON1 and LIST_POISON2 as undereferencable pointers in order to trap erronous use of freed list_heads. Unfortunately userspace can arrange for those pointers to actually be dereferencable, potentially turning an oops to an expolit. To avoid this allow architectures (currently x86_64 only) to override the default values for these pointers with truly-undereferencable values. This is easy on x86_64 as the virtual address space is large and contains areas that cannot be mapped. Other 64-bit architectures will likely find similar unmapped ranges. [ingo: switch to 0xdead000000000000 as the unmapped area] [ingo: add comments, cleanup] [jaswinder: eliminate sparse warnings] Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-01-11x86: add support for LZO-compressed kernelsAlbin Tonnerre
The necessary changes to the x86 Kconfig and boot/compressed to allow the use of this new compression method Signed-off-by: Albin Tonnerre <albin.tonnerre@free-electrons.com> Acked-by: H. Peter Anvin <hpa@zytor.com> Tested-by: Wu Zhangjin <wuzhangjin@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Tested-by: Russell King <rmk@arm.linux.org.uk> Acked-by: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-01-11mm: make totalhigh_pages unsigned longAndreas Fenkart
Makes it consistent with the extern declaration, used when CONFIG_HIGHMEM is set Removes redundant casts in printout messages Signed-off-by: Andreas Fenkart <andreas.fenkart@streamunlimited.com> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Howells <dhowells@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Chen Liqin <liqin.chen@sunplusct.com> Cc: Lennox Wu <lennox.wu@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-01-08Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip: x86, irq: Check move_in_progress before freeing the vector mapping x86: copy_from_user() should not return -EFAULT Revert "x86: Side-step lguest problem by only building cmpxchg8b_emu for pre-Pentium" x86/pci: Intel ioh bus num reg accessing fix x86: Fix size for ex trampoline with 32bit
2010-01-06x86, irq: Check move_in_progress before freeing the vector mappingSuresh Siddha
With the recent irq migration fixes (post 2.6.32), Gary Hade has noticed "No IRQ handler for vector" messages during the 2.6.33-rc1 kernel boot on IBM AMD platforms and root caused the issue to this commit: > commit 23359a88e7eca3c4f402562b102f23014db3c2aa > Author: Suresh Siddha <suresh.b.siddha@intel.com> > Date: Mon Oct 26 14:24:33 2009 -0800 > > x86: Remove move_cleanup_count from irq_cfg As part of this patch, we have removed the move_cleanup_count check in smp_irq_move_cleanup_interrupt(). With this change, we can run into a situation where an irq cleanup interrupt on a cpu can cleanup the vector mappings associated with multiple irqs, of which one of the irq's migration might be still in progress. As such when that irq hits the old cpu, we get the "No IRQ handler" messages. Fix this by checking for the irq_cfg's move_in_progress and if the move is still in progress delay the vector cleanup to another irq cleanup interrupt request (which will happen when the irq starts arriving at the new cpu destination). Reported-and-tested-by: Gary Hade <garyhade@us.ibm.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> LKML-Reference: <1262804191.2732.7.camel@sbs-t61.sc.intel.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-01-05Revert "x86: Side-step lguest problem by only building cmpxchg8b_emu for ↵Rusty Russell
pre-Pentium" This reverts commit ae1b22f6e46c03cede7cea234d0bf2253b4261cf. As Linus said in 982d007a6ee: "There was something really messy about cmpxchg8b and clone CPU's, so if you enable it on other CPUs later, do it carefully." This breaks lguest for those configs, but we can fix that by emulating if we have to. Fixes: http://bugzilla.kernel.org/show_bug.cgi?id=14884 Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-01-05x86: copy_from_user() should not return -EFAULTHeiko Carstens
Callers of copy_from_user() expect it to return the number of bytes it could not copy. In no case it is supposed to return -EFAULT. In case of a detected buffer overflow just return the requested length. In addition one could think of a memset that would clear the size of the target object. [ hpa: code is not in .32 so not needed for -stable ] Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: Arjan van de Ven <arjan@linux.intel.com> LKML-Reference: <20100105131911.GC5480@osiris.boeblingen.de.ibm.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-01-04Revert "x86: Side-step lguest problem by only building cmpxchg8b_emu for ↵Rusty Russell
pre-Pentium" This reverts commit ae1b22f6e46c03cede7cea234d0bf2253b4261cf. As Linus said in 982d007a6ee: "There was something really messy about cmpxchg8b and clone CPU's, so if you enable it on other CPUs later, do it carefully." This breaks lguest for those configs, but we can fix that by emulating if we have to. Fixes: http://bugzilla.kernel.org/show_bug.cgi?id=14884 Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> LKML-Reference: <201001051248.49700.rusty@rustcorp.com.au> Cc: stable@kernel.org Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-01-04x86/pci: Intel ioh bus num reg accessing fixYinghai Lu
It is above 0x100 (PCI-Express extended register space), so if mmconf is not enable, we can't access it. [ hpa: changed the bound from 0x200 to 0x120, which is the tight bound. ] Reported-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1261525263-13763-3-git-send-email-yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-01-04x86: Fix size for ex trampoline with 32bitYinghai Lu
fix for error that is introduced by | x86: Use find_e820() instead of hard coded trampoline address it should end with PAGE_SIZE + PAGE_SIZE Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1261525263-13763-2-git-send-email-yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-12-31Merge branch 'perf-fixes-for-linus-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf: Fix NULL deref in inheritance code perf: Pass appropriate frame pointer to dump_trace()
2009-12-31Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86/agp: Fix agp_amd64_init() initialization with CONFIG_GART_IOMMU enabled x86: SGI UV: Fix writes to led registers on remote uv hubs x86, kmemcheck: Use KERN_WARNING for error reporting x86: Use KERN_DEFAULT log-level in __show_regs() x86, compress: Force i386 instructions for the decompressor x86/amd-iommu: Fix initialization failure panic dma-debug: Do not add notifier when dma debugging is disabled. x86: Fix objdump version check in chkobjdump.awk for different formats. Trivial conflicts in arch/x86/include/asm/uv/uv_hub.h due to me having applied an earlier version of an SGI UV fix.
2009-12-31perf: Pass appropriate frame pointer to dump_trace()Frederic Weisbecker
Pass the frame pointer from the regs of the interrupted path to dump_trace() while processing the stack trace. Currently, dump_trace() takes the current bp and starts the callchain from dump_trace() itself. This is wasteful because we need to walk through the entire NMI/DEBUG stack before retrieving the interrupted point. We can fix that by just using the frame pointer from the captured regs. It points exactly where we want to start. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1262235183-5320-1-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org>
2009-12-30Merge branch 'release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: ACPI: introduce kernel parameter acpi_sleep=sci_force_enable ACPI: WMI: Survive BIOS with duplicate GUIDs dell-wmi - fix condition to abort driver loading wmi: check find_guid() return value to prevent oops dell-wmi, hp-wmi, msi-wmi: check wmi_get_event_data() return value ACPI: hp-wmi, msi-wmi: clarify that wmi_install_notify_handler() returns an acpi_status dell-wmi: sys_init_module: 'dell_wmi'->init suspiciously returned 21, it should ACPI video: correct error-handling code ACPI video: no warning message if "acpi_backlight=vendor" is used ACPI: fix ACPI=n allmodconfig build thinkpad-acpi: improve Kconfig help text thinkpad-acpi: update volume subdriver documentation thinkpad-acpi: make volume subdriver optional thinkpad-acpi: don't fail to load the entire module due to ALSA problems thinkpad-acpi: don't take the first ALSA slot by default
2009-12-30ACPI: introduce kernel parameter acpi_sleep=sci_force_enableZhang Rui
Introduce kernel parameter acpi_sleep=sci_force_enable some laptop requires SCI_EN being set directly on resume, or else they hung somewhere in the resume code path. We already have a blacklist for these laptops but we still need this option, especially when debugging some suspend/resume problems, in case there are systems that need this workaround and are not yet in the blacklist. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-30Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: PCI/cardbus: Add a fixup hook and fix powerpc PCI: change PCI nomenclature in drivers/pci/ (non-comment changes) PCI: change PCI nomenclature in drivers/pci/ (comment changes) PCI: fix section mismatch on update_res() PCI: add Intel 82599 Virtual Function specific reset method PCI: add Intel USB specific reset method PCI: support device-specific reset methods PCI: Handle case when no pci device can provide cache line size hint PCI/PM: Propagate wake-up enable for PCIe devices too vgaarbiter: fix a typo in the vgaarbiter Documentation
2009-12-30Merge branch 'kvm-updates/2.6.33' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
* 'kvm-updates/2.6.33' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: get rid of kvm_create_vm() unused label warning on s390 KVM: powerpc: Fix mtsrin in book3s_64 mmu KVM: ia64: fix build breakage due to host spinlock change KVM: x86: Extend KVM_SET_VCPU_EVENTS with selective updates KVM: LAPIC: make sure IRR bitmap is scanned after vm load KVM: Fix possible circular locking in kvm_vm_ioctl_assign_device() KVM: MMU: remove prefault from invlpg handler
2009-12-30x86_64 SGI UV: Fix writes to led registers on remote uv hubs.Mike Travis
The wrong address was being used to write the SCIR led regs on remote hubs. Also, there was an inconsistency between how BIOS and the kernel indexed these regs. Standardize on using the lower 6 bits of the APIC ID as the index. This patch fixes the problem of writing to an errant address to a cpu # >= 64. Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Jack Steiner <steiner@sgi.com> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-29x86: SGI UV: Fix writes to led registers on remote uv hubsMike Travis
The wrong address was being used to write the SCIR led regs on remote hubs. Also, there was an inconsistency between how BIOS and the kernel indexed these regs. Standardize on using the lower 6 bits of the APIC ID as the index. This patch fixes the problem of writing to an errant address to a cpu # >= 64. Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Jack Steiner <steiner@sgi.com> Cc: Robin Holt <holt@sgi.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: stable@kernel.org LKML-Reference: <4B3922F9.3060905@sgi.com> [ v2: fix a number of annoying checkpatch artifacts and whitespace noise ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-28x86, kmemcheck: Use KERN_WARNING for error reportingPekka Enberg
As suggested by Vegard Nossum, use KERN_WARNING for error reporting to make sure kmemcheck reports end up in syslog. Suggested-by: Vegard Nossum <vegard.nossum@gmail.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <1261990935.4641.7.camel@penberg-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-28x86: Use KERN_DEFAULT log-level in __show_regs()Pekka Enberg
Andrew Morton reported a strange looking kmemcheck warning: WARNING: kmemcheck: Caught 32-bit read from uninitialized memory (ffff88004fba6c20) 0000000000000000310000000000000000000000000000002413000000c9ffff u u u u u u u u u u u u u u u u i i i i i i i i u u u u u u u u [<ffffffff810af3aa>] kmemleak_scan+0x25a/0x540 [<ffffffff810afbcb>] kmemleak_scan_thread+0x5b/0xe0 [<ffffffff8104d0fe>] kthread+0x9e/0xb0 [<ffffffff81003074>] kernel_thread_helper+0x4/0x10 [<ffffffffffffffff>] 0xffffffffffffffff The above printout is missing register dump completely. The problem here is that the output comes from syslog which doesn't show KERN_INFO log-level messages. We didn't see this before because both of us were testing on 32-bit kernels which use the _default_ log-level. Fix that up by explicitly using KERN_DEFAULT log-level for __show_regs() printks. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Vegard Nossum <vegard.nossum@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1261988819.4641.2.camel@penberg-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-28Merge branch 'iommu/fixes' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into x86/urgent
2009-12-27KVM: x86: Extend KVM_SET_VCPU_EVENTS with selective updatesJan Kiszka
User space may not want to overwrite asynchronously changing VCPU event states on write-back. So allow to skip nmi.pending and sipi_vector by setting corresponding bits in the flags field of kvm_vcpu_events. [avi: advertise the bits in KVM_GET_VCPU_EVENTS] Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-27KVM: LAPIC: make sure IRR bitmap is scanned after vm loadMarcelo Tosatti
The vcpus are initialized with irr_pending set to false, but loading the LAPIC registers with pending IRR fails to reset the irr_pending variable. Cc: stable@kernel.org Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-27KVM: MMU: remove prefault from invlpg handlerMarcelo Tosatti
The invlpg prefault optimization breaks Windows 2008 R2 occasionally. The visible effect is that the invlpg handler instantiates a pte which is, microseconds later, written with a different gfn by another vcpu. The OS could have other mechanisms to prevent a present translation from being used, which the hypervisor is unaware of. While the documentation states that the cpu is at liberty to prefetch tlb entries, it looks like this is not heeded, so remove tlb prefetch from invlpg. Cc: stable@kernel.org Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2009-12-25x86, compress: Force i386 instructions for the decompressorH. Peter Anvin
Recently, some distros have started shipping versions of gcc which default to -march=i686. This breaks building kernels for pre-i686 machines, even if they have been selected in Kconfig, due to the generation of CMOV instructions. There isn't enough benefit to try to preserve the generation of these instructions even when selected, so simply force -march=i386 for the decompressor when building a 32-bit kernel. Reported-and-tested-by: Chris Rankin <rankincj@yahoo.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> LKML-Reference: <219280.97558.qm@web52907.mail.re2.yahoo.com>
2009-12-24Merge branch 'misc-2.6.33' into releaseLen Brown
2009-12-24Merge branch 'pdc' into releaseLen Brown
2009-12-23Revert "x86, ucode-amd: Ensure ucode update on suspend/resume after CPU ↵Linus Torvalds
off/online cycle" This reverts commit 9f15226e75583547aaf542c6be4bdac1060dd425. It's just wrong, and broke resume for Rafael even on a non-AMD CPU. As Rafael says: "... it causes microcode_init_cpu() to be called during resume even for CPUs for which there's no microcode to apply. That, in turn, results in executing request_firmware() (on Intel CPUs at least) which doesn't work at this stage of resume (we have device interrupts disabled, I/O devices are still suspended and so on). If I'm not mistaken, the "if (uci->valid)" logic means "if that CPU is known to us" , so before commit 9f15226e755 microcode_resume_cpu() was called for all CPUs already in the system during suspend, which was the right thing to do. The commit changed it so that the CPUs without microcode to apply are now treated as "unknown", which is not quite right. The problem this commit attempted to solve has to be handled differently." Bisected-and -requested-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-22arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c: avoid cross-CPU interrupts by ↵Andrew Morton
using smp_call_function_any() Presently acpi-cpufreq will perform the MSR read on the first CPU in the mask. That's inefficient if that CPU differs from the current CPU. Because we have to perform a cross-CPU call, but we could have run the rdmsr on the current CPU. So switch to using the new smp_call_function_any(), which will perform the call on the current CPU if that CPU is present in the mask (it is). Cc: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com> Cc: Dave Jones <davej@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Jaswinder Singh Rajput <jaswinder@kernel.org> Cc: Len Brown <len.brown@intel.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-22ACPI: processor: unify arch_acpi_processor_cleanup_pdcAlex Chiang
The x86 and ia64 implementations of the function in $subject are exactly the same. Also, since the arch-specific implementations of setting _PDC have been completely hollowed out, remove the empty shells. Cc: Tony Luck <tony.luck@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-22ACPI: processor: finish unifying arch_acpi_processor_init_pdc()Alex Chiang
The only thing arch-specific about calling _PDC is what bits get set in the input obj_list buffer. There's no need for several levels of indirection to twiddle those bits. Additionally, since we're just messing around with a buffer, we can simplify the interface; no need to pass around the entire struct acpi_processor * just to get at the buffer. Cc: Tony Luck <tony.luck@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-22ACPI: processor: factor out common _PDC settingsAlex Chiang
Both x86 and ia64 initialize _PDC with mostly common bit settings. Factor out the common settings and leave the arch-specific ones alone. Cc: Tony Luck <tony.luck@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-22ACPI: processor: unify arch_acpi_processor_init_pdcAlex Chiang
The x86 and ia64 implementations of arch_acpi_processor_init_pdc() are almost exactly the same. The only difference is in what bits they set in obj_list buffer. Combine the boilerplate memory management code, and leave the arch-specific bit twiddling in separate implementations. Cc: Tony Luck <tony.luck@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-22ACPI: processor: introduce arch_has_acpi_pdcAlex Chiang
arch dependent helper function that tells us if we should attempt to evaluate _PDC on this machine or not. The x86 implementation assumes that the CPUs in the machine must be homogeneous, and that you cannot mix CPUs of different vendors. Cc: Tony Luck <tony.luck@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-21x86/amd-iommu: Fix initialization failure panicJoerg Roedel
The assumption that acpi_table_parse passes the return value of the hanlder function to the caller proved wrong recently. The return value of the handler function is totally ignored. This makes the initialization code for AMD IOMMU buggy in a way that could cause a kernel panic on initialization. This patch fixes the issue in the AMD IOMMU driver. Cc: stable@kernel.org Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-12-19Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf session: Make events_stats u64 to avoid overflow on 32-bit arches hw-breakpoints: Fix hardware breakpoints -> perf events dependency perf events: Dont report side-band events on each cpu for per-task-per-cpu events perf events, x86/stacktrace: Fix performance/softlockup by providing a special frame pointer-only stack walker perf events, x86/stacktrace: Make stack walking optional perf events: Remove unused perf_counter.h header file perf probe: Check new event name kprobe-tracer: Check new event/group name perf probe: Check whether debugfs path is correct perf probe: Fix libdwarf include path for Debian
2009-12-19Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, irq: Allow 0xff for /proc/irq/[n]/smp_affinity on an 8-cpu system Makefile: Unexport LC_ALL instead of clearing it x86: Fix objdump version check in arch/x86/tools/chkobjdump.awk x86: Reenable TSC sync check at boot, even with NONSTOP_TSC x86: Don't use POSIX character classes in gen-insn-attr-x86.awk Makefile: set LC_CTYPE, LC_COLLATE, LC_NUMERIC to C x86: Increase MAX_EARLY_RES; insufficient on 32-bit NUMA x86: Fix checking of SRAT when node 0 ram is not from 0 x86, cpuid: Add "volatile" to asm in native_cpuid() x86, msr: msrs_alloc/free for CONFIG_SMP=n x86, amd: Get multi-node CPU info from NodeId MSR instead of PCI config space x86: Add IA32_TSC_AUX MSR and use it x86, msr/cpuid: Register enough minors for the MSR and CPUID drivers initramfs: add missing decompressor error check bzip2: Add missing checks for malloc returning NULL bzip2/lzma/gzip: pre-boot malloc doesn't return NULL on failure
2009-12-18x86: Fix objdump version check in chkobjdump.awk for different formats.Masami Hiramatsu
Different version of objdump says its version in different way; GNU objdump 2.16.1 or GNU objdump version 2.19.51.0.14-1.fc11 20090722 This patch uses the first argument which starts with a number as version string. Changes in v2: - Remove unneeded increment. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> LKML-Reference: <20091218154012.16960.5113.stgit@dhcp-100-2-132.bos.redhat.com> Suggested-by: H. Peter Anvin <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-12-18hw-breakpoints: Fix hardware breakpoints -> perf events dependencyFrederic Weisbecker
The kbuild's select command doesn't propagate through the config dependencies. Hence the current rules of hardware breakpoint's config can't ensure perf can never be disabled under us. We have: config X86 selects HAVE_HW_BREAKPOINTS config HAVE_HW_BREAKPOINTS select PERF_EVENTS config PERF_EVENTS [...] x86 will select the breakpoints but that won't propagate to perf events. The user can still disable the latter, but it is necessary for the breakpoints. What we need is: - x86 selects HAVE_HW_BREAKPOINTS and PERF_EVENTS - HAVE_HW_BREAKPOINTS depends on PERF_EVENTS so that we ensure PERF_EVENTS is enabled and frozen for x86. This fixes the following kind of build errors: In file included from arch/x86/kernel/hw_breakpoint.c:31: include/linux/hw_breakpoint.h: In function 'hw_breakpoint_addr': include/linux/hw_breakpoint.h:39: error: 'struct perf_event' has no member named 'attr' v2: Select also ANON_INODES from x86, required for perf Reported-by: Cyrill Gorcunov <gorcunov@gmail.com> Reported-by: Michal Marek <mmarek@suse.cz> Reported-by: Andrew Randrianasulu <randrik_a@yahoo.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: K.Prasad <prasad@linux.vnet.ibm.com> LKML-Reference: <1261010034-7786-1-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-17x86, irq: Allow 0xff for /proc/irq/[n]/smp_affinity on an 8-cpu systemSuresh Siddha
John Blackwood reported: > on an older Dell PowerEdge 6650 system with 8 cpus (4 are hyper-threaded), > and 32 bit (x86) kernel, once you change the irq smp_affinity of an irq > to be less than all cpus in the system, you can never change really the > irq smp_affinity back to be all cpus in the system (0xff) again, > even though no error status is returned on the "/bin/echo ff > > /proc/irq/[n]/smp_affinity" operation. > > This is due to that fact that BAD_APICID has the same value as > all cpus (0xff) on 32bit kernels, and thus the value returned from > set_desc_affinity() via the cpu_mask_to_apicid_and() function is treated > as a failure in set_ioapic_affinity_irq_desc(), and no affinity changes > are made. set_desc_affinity() is already checking if the incoming cpu mask intersects with the cpu online mask or not. So there is no need for the apic op cpu_mask_to_apicid_and() to check again and return BAD_APICID. Remove the BAD_APICID return value from cpu_mask_to_apicid_and() and also fix set_desc_affinity() to return -1 instead of using BAD_APICID to represent error conditions (as cpu_mask_to_apicid_and() can return logical or physical apicid values and BAD_APICID is really to represent bad physical apic id). Reported-by: John Blackwood <john.blackwood@ccur.com> Root-caused-by: John Blackwood <john.blackwood@ccur.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> LKML-Reference: <1261103386.2535.409.camel@sbs-t61> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-12-17Merge branch 'cpumask-cleanups' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus * 'cpumask-cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: cpumask: rename tsk_cpumask to tsk_cpus_allowed cpumask: don't recommend set_cpus_allowed hack in Documentation/cpu-hotplug.txt cpumask: avoid dereferencing struct cpumask cpumask: convert drivers/idle/i7300_idle.c to cpumask_var_t cpumask: use modern cpumask style in drivers/scsi/fcoe/fcoe.c cpumask: avoid deprecated function in mm/slab.c cpumask: use cpu_online in kernel/perf_event.c
2009-12-17x86: Fix objdump version check in arch/x86/tools/chkobjdump.awkakpm@linux-foundation.org
It says Warning: objdump version is older than 2.19 Warning: Skipping posttest. because it used the wrong field from `objdump -v': akpm:/usr/src/25> /opt/crosstool/gcc-4.0.2-glibc-2.3.6/x86_64-unknown-linux-gnu/bin/x86_64-unknown-linux-gnu-objdump -v GNU objdump 2.16.1 Copyright 2005 Free Software Foundation, Inc. This program is free software; you may redistribute it under the terms of the GNU General Public License. This program has absolutely no warranty. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <200912172326.nBHNQaQl024796@imap1.linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Masami Hiramatsu <mhiramat@redhat.com>
2009-12-17x86: Reenable TSC sync check at boot, even with NONSTOP_TSCPallipadi, Venkatesh
Commit 83ce4009 did the following change If the TSC is constant and non-stop, also set it reliable. But, there seems to be few systems that will end up with TSC warp across sockets, depending on how the cpus come out of reset. Skipping TSC sync test on such systems may result in time inconsistency later. So, reenable TSC sync test even on constant and non-stop TSC systems. Set, sched_clock_stable to 1 by default and reset it in mark_tsc_unstable, if TSC sync fails. This change still gives perf benefit mentioned in 83ce4009 for systems where TSC is reliable. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> LKML-Reference: <20091217202702.GA18015@linux-os.sc.intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-12-17Merge branch 'for-33' of git://repo.or.cz/linux-kbuildLinus Torvalds
* 'for-33' of git://repo.or.cz/linux-kbuild: (29 commits) net: fix for utsrelease.h moving to generated gen_init_cpio: fixed fwrite warning kbuild: fix make clean after mismerge kbuild: generate modules.builtin genksyms: properly consider EXPORT_UNUSED_SYMBOL{,_GPL}() score: add asm/asm-offsets.h wrapper unifdef: update to upstream revision 1.190 kbuild: specify absolute paths for cscope kbuild: create include/generated in silentoldconfig scripts/package: deb-pkg: use fakeroot if available scripts/package: add KBUILD_PKG_ROOTCMD variable scripts/package: tar-pkg: use tar --owner=root Kbuild: clean up marker net: add net_tstamp.h to headers_install kbuild: move utsrelease.h to include/generated kbuild: move autoconf.h to include/generated drop explicit include of autoconf.h kbuild: move compile.h to include/generated kbuild: drop include/asm kbuild: do not check for include/asm-$ARCH ... Fixed non-conflicting clean merge of modpost.c as per comments from Stephen Rothwell (modpost.c had grown an include of linux/autoconf.h that needed to be changed to generated/autoconf.h)
2009-12-17x86/ptrace: make genregs[32]_get/set more robustLinus Torvalds
The loop condition is fragile: we compare an unsigned value to zero, and then decrement it by something larger than one in the loop. All the callers should be passing in appropriately aligned buffer lengths, but it's better to just not rely on it, and have some appropriate defensive loop limits. Acked-by: Roland McGrath <roland@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-17x86: Don't use POSIX character classes in gen-insn-attr-x86.awkRoland Dreier
Not all awk implementations (including the default awk in Ubuntu 9.10) support POSIX character classes. Since x86-opcode-map.txt is plain ASCII, we can just use explicit ranges for lower case, alphabetic, and alphanumeric characters instead. Signed-off-by: Roland Dreier <rolandd@cisco.com> Acked-by: Masami Hiramatsu <mhiramat@redhat.com> LKML-Reference: <adabphy750b.fsf@roland-alpha.cisco.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-12-17perf events, x86/stacktrace: Fix performance/softlockup by providing a ↵Frederic Weisbecker
special frame pointer-only stack walker It's just wasteful for stacktrace users like perf to walk through every entries on the stack whereas these only accept reliable ones, ie: that the frame pointer validates. Since perf requires pure reliable stacktraces, it needs a stack walker based on frame pointers-only to optimize the stacktrace processing. This might solve some near-lockup scenarios that can be triggered by call-graph tracing timer events. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1261024834-5336-2-git-send-regression-fweisbec@gmail.com> [ v2: fix for modular builds and small detail tidyup ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-17perf events, x86/stacktrace: Make stack walking optionalFrederic Weisbecker
The current print_context_stack helper that does the stack walking job is good for usual stacktraces as it walks through all the stack and reports even addresses that look unreliable, which is nice when we don't have frame pointers for example. But we have users like perf that only require reliable stacktraces, and those may want a more adapted stack walker, so lets make this function a callback in stacktrace_ops that users can tune for their needs. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1261024834-5336-1-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>