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2013-08-12x86, microcode, AMD: Fix early microcode loadingTorsten Kaiser3-29/+27
load_microcode_amd() (and the helper it is using) should not have an cpu parameter. The microcode loading does not depend on the CPU wrt the patches loaded since they will end up in a global list for all CPUs anyway. The change from cpu to x86family in load_microcode_amd() now allows to drop the code messing with cpu_data(cpu) from collect_cpu_info_amd_early(), which is wrong anyway because at that point the per-cpu cpu_info is not yet setup (These values would later be overwritten by smp_store_boot_cpu_info() / smp_store_cpu_info()). Fold the rest of collect_cpu_info_amd_early() into load_ucode_amd_ap(), because its only used at one place and without the cpuinfo_x86 accesses it was not much left. Signed-off-by: Torsten Kaiser <just.for.lkml@googlemail.com> [ Fengguang: build fix ] Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> [ Boris: adapt it to current tree. ] Signed-off-by: Borislav Petkov <bp@suse.de>
2013-08-12x86, microcode, AMD: Make cpu_has_amd_erratum() use the correct struct ↵Torsten Kaiser1-15/+5
cpuinfo_x86 cpu_has_amd_erratum() is buggy, because it uses the per-cpu cpu_info before it is filled by smp_store_boot_cpu_info() / smp_store_cpu_info(). If early microcode loading is enabled its collect_cpu_info_amd_early() will fill ->x86 and so the fallback to boot_cpu_data is not used. But ->x86_vendor was not filled and is still X86_VENDOR_INTEL resulting in no errata fixes getting applied and my system hangs on boot. Using cpu_info in cpu_has_amd_erratum() is wrong anyway: its only caller init_amd() will have a struct cpuinfo_x86 as parameter and the set_cpu_bug() that is controlled by cpu_has_amd_erratum() also only uses that struct. So pass the struct cpuinfo_x86 from init_amd() to cpu_has_amd_erratum() and the broken fallback can be dropped. [ Boris: Drop WARN_ON() since we're called only from init_amd() ] Signed-off-by: Torsten Kaiser <just.for.lkml@googlemail.com> Signed-off-by: Borislav Petkov <bp@suse.de>
2013-08-12perf/x86: Add Haswell ULT model number used in Macbook Air and other systemsAndi Kleen1-0/+1
This one was missed earlier. Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1376007983-31616-1-git-send-email-andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-08-09x86: Don't clear olpc_ofw_header when sentinel is detectedDaniel Drake1-2/+2
OpenFirmware wasn't quite following the protocol described in boot.txt and the kernel has detected this through use of the sentinel value in boot_params. OFW does zero out almost all of the stuff that it should do, but not the sentinel. This causes the kernel to clear olpc_ofw_header, which breaks x86 OLPC support. OpenFirmware has now been fixed. However, it would be nice if we could maintain Linux compatibility with old firmware versions. To do that, we just have to avoid zeroing out olpc_ofw_header. OFW does not write to any other parts of the header that are being zapped by the sentinel-detection code, and all users of olpc_ofw_header are somewhat protected through checking for the OLPC_OFW_SIG magic value before using it. So this should not cause any problems for anyone. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/20130809221420.618E6FAB03@dev.laptop.org Acked-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: <stable@vger.kernel.org> # v3.9+
2013-08-07Merge branch 'pm-cpufreq-ondemand' into pm-cpufreqRafael J. Wysocki1-29/+0
* pm-cpufreq: cpufreq: Remove unused function __cpufreq_driver_getavg() cpufreq: Remove unused APERF/MPERF support cpufreq: ondemand: Change the calculation of target frequency
2013-08-06x86, asmlinkage, vdso: Mark vdso variables __visibleAndi Kleen1-1/+1
Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1375740170-7446-17-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-08-06x86, asmlinkage, power: Make various symbols used by the suspend asm code ↵Andi Kleen2-10/+10
visible Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1375740170-7446-16-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-08-06x86, asmlinkage: Make 64bit checksum functions visibleAndi Kleen1-1/+1
They are implemented in assembler. Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1375740170-7446-14-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-08-06x86, asmlinkage, paravirt: Add __visible/asmlinkage to xen paravirt opsAndi Kleen3-11/+12
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1375740170-7446-13-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-08-06x86, asmlinkage, apm: Make APM data structure used from assembler visibleAndi Kleen1-1/+1
Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1375740170-7446-12-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-08-06x86, asmlinkage: Make syscall tables visibleAndi Kleen2-2/+2
They are referenced from entry*.S. Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1375740170-7446-11-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-08-06x86, asmlinkage: Make several variables used from assembler/linker script ↵Andi Kleen10-13/+14
visible Plus one function, load_gs_index(). Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1375740170-7446-10-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-08-06x86, asmlinkage: Make kprobes code visible and fix assembler codeAndi Kleen3-10/+7
- Make all the external assembler template symbols __visible - Move the templates inline assembler code into a top level assembler statement, not inside a function. This avoids it being optimized away or cloned. Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1375740170-7446-8-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-08-06x86, asmlinkage: Make various syscalls asmlinkageAndi Kleen2-5/+5
FWIW I suspect sys_rt_sigreturn/sys_sigreturn should use standard SYSCALL wrappers. But I didn't do that change in this patch. Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1375740170-7446-7-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-08-06x86, asmlinkage: Make 32bit/64bit __switch_to visibleAndi Kleen3-4/+4
This function is called from inline assembler, so has to be visible. Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1375740170-7446-6-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-08-06x86, asmlinkage: Make _*_start_kernel visibleAndi Kleen3-5/+7
Obviously these functions have to be visible, otherwise the whole kernel could be optimized away. Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1375740170-7446-5-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-08-06x86, asmlinkage: Make all interrupt handlers asmlinkage / __visibleAndi Kleen6-81/+77
These handlers are all referenced from assembler stubs, so need to be visible. The handlers without arguments become asmlinkage, the others __visible to not force regparms(0) on x86-32. I put it all into a single patch, please let me know if you want it it split up. Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1375740170-7446-4-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-08-06x86, asmlinkage: Change dotraplinkage into __visible on 32bitAndi Kleen1-5/+1
Mark 32bit dotraplinkage functions as __visible for LTO. 64bit already is using asmlinkage which includes it. v2: Clean up (M.Marek) Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1375740170-7446-3-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-08-06x86: Fix sys_call_table type in asm/syscall.hAndi Kleen2-3/+3
Make the sys_call_table type defined in asm/syscall.h match the definition in syscall_64.c v2: include asm/syscall.h in syscall_64.c too. I left uml alone because it doesn't have an syscall.h on its own and including the native one leads to other errors. Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1375740170-7446-2-git-send-email-andi@firstfloor.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Richard Weinberger <richard@nod.at>
2013-08-06Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds4-8/+19
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull misc x86 fixes from Peter Anvin. * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, amd, microcode: Fix error path in apply_microcode_amd() x86, fpu: correct the asm constraints for fxsave, unbreak mxcsr.daz x86, efi: correct call to free_pages x86/iommu/vt-d: Expand interrupt remapping quirk to cover x58 chipset
2013-08-06x86, insn: Add new opcodes as of June, 2013Masami Hiramatsu2-19/+27
Add TSX-NI related instructions and new instructions to x86-opcode-map.txt according to the Intel(R) 64 and IA-32 Architectures Software Developer's Manual Vol2C (June, 2013). This also includes below updates. - Fix a typo of MWAIT (the lack of (11B)). - Change NOP Ev to prefetchw Ev - Add CRC32 new prefix style (66&F2) - Add ADCX, ADOX, RDSEED, CLAC and STAC instructions Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Link: http://lkml.kernel.org/r/20130806073750.4049.12365.stgit@udc4-manage.rcp.hitachi.co.jp Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-08-05Merging v3.10-rc2 as I need to apply a fix forStefano Stabellini5-8/+24
3cc8e40e8ff8e232a9dd672da81beabd09f87366 "xen/arm: rename xen_secondary_init and run it on every online cpu" The commit is in v3.10-rc2, the current branch is based on v3.10-rc1.
2013-08-05perf/x86: Fix intel QPI uncore event definitionsVince Weaver1-2/+2
John McCalpin reports that the "drs_data" and "ncb_data" QPI uncore events are missing the "extra bit" and always return zero values unless the bit is properly set. More details from him: According to the Xeon E5-2600 Product Family Uncore Performance Monitoring Guide, Table 2-94, about 1/2 of the QPI Link Layer events (including the ones that "perf" calls "drs_data" and "ncb_data") require that the "extra bit" be set. This was confusing for a while -- a note at the bottom of page 94 says that the "extra bit" is bit 16 of the control register. Unfortunately, Table 2-86 clearly says that bit 16 is reserved and must be zero. Looking around a bit, I found that bit 21 appears to be the correct "extra bit", and further investigation shows that "perf" actually agrees with me: [root@c560-003.stampede]# cat /sys/bus/event_source/devices/uncore_qpi_0/format/event config:0-7,21 So the command # perf -e "uncore_qpi_0/event=drs_data/" Is the same as # perf -e "uncore_qpi_0/event=0x02,umask=0x08/" While it should be # perf -e "uncore_qpi_0/event=0x102,umask=0x08/" I confirmed that this last version gives results that agree with the amount of data that I expected the STREAM benchmark to move across the QPI link in the second (cross-chip) test of the original script. Reported-by: John McCalpin <mccalpin@tacc.utexas.edu> Signed-off-by: Vince Weaver <vincent.weaver@maine.edu> Cc: zheng.z.yan@intel.com Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Paul Mackerras <paulus@samba.org> Cc: <stable@kernel.org> Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1308021037280.26119@vincent-weaver-1.um.maine.edu Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-08-02Merge tag 'please-pull-fix-mce-regression' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras Pull MCE fix from Tony Luck: "Fix a regression in mce-severity.c" * tag 'please-pull-fix-mce-regression' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras: x86/mce: Fix mce regression from recent cleanup
2013-08-01sched/x86: Optimize switch_mm() for multi-threaded workloadsRik van Riel1-7/+13
Dick Fowles, Don Zickus and Joe Mario have been working on improvements to perf, and noticed heavy cache line contention on the mm_cpumask, running linpack on a 60 core / 120 thread system. The cause turned out to be unnecessary atomic accesses to the mm_cpumask. When in lazy TLB mode, the CPU is only removed from the mm_cpumask if there is a TLB flush event. Most of the time, no such TLB flush happens, and the kernel skips the TLB reload. It can also skip the atomic memory set & test. Here is a summary of Joe's test results: * The __schedule function dropped from 24% of all program cycles down to 5.5%. * The cacheline contention/hotness for accesses to that bitmask went from being the 1st/2nd hottest - down to the 84th hottest (0.3% of all shared misses which is now quite cold) * The average load latency for the bit-test-n-set instruction in __schedule dropped from 10k-15k cycles down to an average of 600 cycles. * The linpack program results improved from 133 GFlops to 144 GFlops. Peak GFlops rose from 133 to 153. Reported-by: Don Zickus <dzickus@redhat.com> Reported-by: Joe Mario <jmario@redhat.com> Tested-by: Joe Mario <jmario@redhat.com> Signed-off-by: Rik van Riel <riel@redhat.com> Reviewed-by: Paul Turner <pjt@google.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/20130731221421.616d3d20@annuminas.surriel.com [ Made the comments consistent around the modified code. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-07-31arch/x86/platform/ce4100/ce4100.c: include reboot.hAndrew Morton1-0/+1
Fix the build: arch/x86/platform/ce4100/ce4100.c: In function 'x86_ce4100_early_setup': arch/x86/platform/ce4100/ce4100.c:165:2: error: 'reboot_type' undeclared (first use in this function) Reported-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-31x86, amd, microcode: Fix error path in apply_microcode_amd()Torsten Kaiser1-4/+5
Return -1 (like Intels apply_microcode) when the loading fails, also do not set the active microcode level on failure. Signed-off-by: Torsten Kaiser <just.for.lkml@googlemail.com> Link: http://lkml.kernel.org/r/20130723225823.2e4e7588@googlemail.com Acked-by: Borislav Petkov <bp@suse.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-07-31x86 / tboot / ACPI: Fail extended mode reduced hardware sleepBen Guthro1-0/+10
Register for the extended sleep callback from ACPI. As tboot currently does not support the reduced hardware sleep interface, fail this extended sleep call. Signed-off-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Ben Guthro <benjamin.guthro@citrix.com> Cc: tboot-devel@lists.sourceforge.net Cc: Gang Wei <gang.wei@intel.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-07-30Merge tag 'efi-urgent' of ↵Ingo Molnar1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/urgent Pull EFI fix from Matt Fleming: * The size of memory that gets freed by free_pages() needs to be specified in pages, not bytes - by Roy Franz. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-07-29x86 / cpu topology: remove the stale macro arch_provides_topology_pointersHanjun Guo1-3/+0
Macro arch_provides_topology_pointers is pointless now, remove it. Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-07-29x86/mce: Fix mce regression from recent cleanupTony Luck1-2/+2
In commit 33d7885b594e169256daef652e8d3527b2298e75 x86/mce: Update MCE severity condition check We simplified the rules to recognise each classification of recoverable machine check combining the instruction and data fetch rules into a single entry based on clarifications in the June 2013 SDM that all recoverable events would be reported on the unaffected processor with MCG_STATUS.EIPV=0 and MCG_STATUS.RIPV=1. Unfortunately the simplified rule has a couple of bugs. Fix them here. Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2013-07-26x86/PCI: MMCONFIG: Check earlier for MMCONFIG region at address zeroethan.zhao1-6/+1
We can check for addr being zero earlier and thus avoid the mutex_unlock() cleanup path. [bhelgaas: drop warning printk] Signed-off-by: ethan.zhao <ethan.zhao@oracle.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Yinghai Lu <yinghai@kernel.org>
2013-07-26x86, fpu: correct the asm constraints for fxsave, unbreak mxcsr.dazH.J. Lu1-1/+1
GCC will optimize mxcsr_feature_mask_init in arch/x86/kernel/i387.c: memset(&fx_scratch, 0, sizeof(struct i387_fxsave_struct)); asm volatile("fxsave %0" : : "m" (fx_scratch)); mask = fx_scratch.mxcsr_mask; if (mask == 0) mask = 0x0000ffbf; to memset(&fx_scratch, 0, sizeof(struct i387_fxsave_struct)); asm volatile("fxsave %0" : : "m" (fx_scratch)); mask = 0x0000ffbf; since asm statement doesn’t say it will update fx_scratch. As the result, the DAZ bit will be cleared. This patch fixes it. This bug dates back to at least kernel 2.6.12. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: <stable@vger.kernel.org>
2013-07-26x86, efi: correct call to free_pagesRoy Franz1-1/+1
Specify memory size in pages, not bytes. Signed-off-by: Roy Franz <roy.franz@linaro.org> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2013-07-26cpufreq: Remove unused APERF/MPERF supportStratos Karafotis1-29/+0
The target frequency calculation method in the ondemand governor has changed and it is now independent of the measured average frequency. Consequently, the APERF/MPERF support in cpufreq is not used any more, so drop it. [rjw: Changelog] Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-07-25x86/pci/mrst: Cleanup checkpatch.pl warningsValentina Manea1-17/+24
This patch fixes warning and errors found by checkpatch.pl: * replace asm/acpi.h, asm/io.h and asm/smp.h with linux/acpi.h, linux/io.h and linux/smp.h respectively * remove explicit initialization to 0 of a static global variable * replace printk(KERN_INFO ...) with pr_info * use tabs instead of spaces for indentation * arrange comments so that they adhere to Documentation/CodingStyle [bhelgaas: capitalize "PCI", "Langwell", "Lincroft" consistently] Signed-off-by: Valentina Manea <valentina.manea.m@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Ingo Molnar <mingo@kernel.org>
2013-07-24Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds3-796/+0
Pull crypto fixes from Herbert Xu: "This push fixes a memory corruption issue in caam, as well as reverting the new optimised crct10dif implementation as it breaks boot on initrd systems. Hopefully crct10dif will be reinstated once the supporting code is added so that it doesn't break boot" * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: Revert "crypto: crct10dif - Wrap crc_t10dif function all to use crypto transform framework" crypto: caam - Fixed the memory out of bound overwrite issue
2013-07-24Revert "crypto: crct10dif - Wrap crc_t10dif function all to use crypto ↵Herbert Xu3-796/+0
transform framework" This reverts commits 67822649d7305caf3dd50ed46c27b99c94eff996 39761214eefc6b070f29402aa1165f24d789b3f7 0b95a7f85718adcbba36407ef88bba0a7379ed03 31d939625a9a20b1badd2d4e6bf6fd39fa523405 2d31e518a42828df7877bca23a958627d60408bc Unfortunately this change broke boot on some systems that used an initrd which does not include the newly created crct10dif modules. As these modules are required by sd_mod under certain configurations this is a serious problem. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-07-23perf/x86: Add ability to calculate TSC from perf sample timestampsAdrian Hunter3-0/+13
For modern CPUs, perf clock is directly related to TSC. TSC can be calculated from perf clock and vice versa using a simple calculation. Two of the three componenets of that calculation are already exported in struct perf_event_mmap_page. This patch exports the third. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: "H. Peter Anvin" <hpa@zytor.com> Link: http://lkml.kernel.org/r/1372425741-1676-3-git-send-email-adrian.hunter@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-07-23x86/iommu/vt-d: Expand interrupt remapping quirk to cover x58 chipsetNeil Horman1-2/+12
Recently we added an early quirk to detect 5500/5520 chipsets with early revisions that had problems with irq draining with interrupt remapping enabled: commit 03bbcb2e7e292838bb0244f5a7816d194c911d62 Author: Neil Horman <nhorman@tuxdriver.com> Date: Tue Apr 16 16:38:32 2013 -0400 iommu/vt-d: add quirk for broken interrupt remapping on 55XX chipsets It turns out this same problem is present in the intel X58 chipset as well. See errata 69 here: http://www.intel.com/content/www/us/en/chipsets/x58-express-specification-update.html This patch extends the pci early quirk so that the chip devices/revisions specified in the above update are also covered in the same way: Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> Acked-by: Donald Dutile <ddutile@redhat.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Andrew Cooper <andrew.cooper3@citrix.com> Cc: Malcolm Crossley <malcolm.crossley@citrix.com> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Don Zickus <dzickus@redhat.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/1374059639-8631-1-git-send-email-nhorman@tuxdriver.com [ Small edits. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-07-23x86/ia32/asm: Remove unused argument in macroRamkumar Ramachandra1-1/+1
Commit 3fe26fa ("x86: get rid of pt_regs argument in sigreturn variants", from 2012-11-12) changed the body of PTREGSCALL to drop arg, and updated the callsites; unfortunately, it forgot to update the macro argument list, leaving an unused argument. Fix this. Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Link: http://lkml.kernel.org/r/1373479468-7175-1-git-send-email-artagnon@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-07-23kprobes/x86: Call out into INT3 handler directly instead of using notifierJiri Kosina3-23/+14
In fd4363fff3d96 ("x86: Introduce int3 (breakpoint)-based instruction patching"), the mechanism that was introduced for notifying alternatives code from int3 exception handler that and exception occured was die_notifier. This is however problematic, as early code might be using jump labels even before the notifier registration has been performed, which will then lead to an oops due to unhandled exception. One of such occurences has been encountered by Fengguang: int3: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC Modules linked in: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.11.0-rc1-01429-g04bf576 #8 task: ffff88000da1b040 ti: ffff88000da1c000 task.ti: ffff88000da1c000 RIP: 0010:[<ffffffff811098cc>] [<ffffffff811098cc>] ttwu_do_wakeup+0x28/0x225 RSP: 0000:ffff88000dd03f10 EFLAGS: 00000006 RAX: 0000000000000000 RBX: ffff88000dd12940 RCX: ffffffff81769c40 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff88000dd03f28 R08: ffffffff8176a8c0 R09: 0000000000000002 R10: ffffffff810ff484 R11: ffff88000dd129e8 R12: ffff88000dbc90c0 R13: ffff88000dbc90c0 R14: ffff88000da1dfd8 R15: ffff88000da1dfd8 FS: 0000000000000000(0000) GS:ffff88000dd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00000000ffffffff CR3: 0000000001c88000 CR4: 00000000000006e0 Stack: ffff88000dd12940 ffff88000dbc90c0 ffff88000da1dfd8 ffff88000dd03f48 ffffffff81109e2b ffff88000dd12940 0000000000000000 ffff88000dd03f68 ffffffff81109e9e 0000000000000000 0000000000012940 ffff88000dd03f98 Call Trace: <IRQ> [<ffffffff81109e2b>] ttwu_do_activate.constprop.56+0x6d/0x79 [<ffffffff81109e9e>] sched_ttwu_pending+0x67/0x84 [<ffffffff8110c845>] scheduler_ipi+0x15a/0x2b0 [<ffffffff8104dfb4>] smp_reschedule_interrupt+0x38/0x41 [<ffffffff8173bf5d>] reschedule_interrupt+0x6d/0x80 <EOI> [<ffffffff810ff484>] ? __atomic_notifier_call_chain+0x5/0xc1 [<ffffffff8105cc30>] ? native_safe_halt+0xd/0x16 [<ffffffff81015f10>] default_idle+0x147/0x282 [<ffffffff81017026>] arch_cpu_idle+0x3d/0x5d [<ffffffff81127d6a>] cpu_idle_loop+0x46d/0x5db [<ffffffff81127f5c>] cpu_startup_entry+0x84/0x84 [<ffffffff8104f4f8>] start_secondary+0x3c8/0x3d5 [...] Fix this by directly calling poke_int3_handler() from the int3 exception handler (analogically to what ftrace has been doing already), instead of relying on notifier, registration of which might not have yet been finalized by the time of the first trap. Reported-and-tested-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: H. Peter Anvin <hpa@linux.intel.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/alpine.LNX.2.00.1307231007490.14024@pobox.suse.cz Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-07-23x86/acpi: Fix incorrect sanity check in acpi_register_lapic()Tang Chen1-1/+1
We wanted to check if the APIC ID is out of range. It should be: if (id >= MAX_LOCAL_APIC) There's no known bad effect of this bug. Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com> Reviewed-by: Len Brown <len.brown@intel.com> Cc: pavel@ucw.cz Cc: rjw@sisk.pl Link: http://lkml.kernel.org/r/1374566419-21120-1-git-send-email-tangchen@cn.fujitsu.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-07-23x86 / PCI: prevent re-allocation of already existing bridge and ROM resourcesMika Westerberg1-0/+4
In hotplug case (especially with Thunderbolt enabled systems) we might need to call pcibios_resource_survey_bus() several times for a bus. The function ends up calling pci_claim_resource() for each bridge resource that then fails claiming that the resource exists already (which it does). Once this happens the resource is invalidated thus preventing devices behind the bridge to allocate their resources. To fix this we do what has been done in pcibios_allocate_dev_resources() and check 'parent' of the given resource. If it is non-NULL it means that the resource has been allocated already and we can skip it. We do the same for ROM resources as well. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-07-19Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/umlLinus Torvalds1-1/+0
Pull UML fixes from Richard Weinberger: "Special thanks goes to Toralf Föster for continuously testing UML and reporting issues!" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: um: remove dead code um: siginfo cleanup uml: Fix which_tmpdir failure when /dev/shm is a symlink, and in other edge cases um: Fix wait_stub_done() error handling um: Mark stub pages mapping with VM_PFNMAP um: Fix return value of strnlen_user()
2013-07-19Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-0/+7
Pull KVM fix from Paolo Bonzini: "This single patch fixes a regression caused by one of the optimizations introduced in 3.11, which is generally visible only on AMD processors" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: MMU: avoid fast page fault fixing mmio page fault
2013-07-19um: remove dead codeRichard Weinberger1-1/+0
"me" is not used. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-07-19kprobes/x86: Remove unused text_poke_smp() and text_poke_smp_batch() functionsMasami Hiramatsu3-112/+2
Since introducing the text_poke_bp() for all text_poke_smp*() callers, text_poke_smp*() are now unused. This patch basically reverts: 3d55cc8a058e ("x86: Add text_poke_smp for SMP cross modifying code") 7deb18dcf047 ("x86: Introduce text_poke_smp_batch() for batch-code modifying") and related commits. This patch also fixes a Kconfig dependency issue on STOP_MACHINE in the case of CONFIG_SMP && !CONFIG_MODULE_UNLOAD. Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Reviewed-by: Jiri Kosina <jkosina@suse.cz> Cc: H. Peter Anvin <hpa@linux.intel.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Jason Baron <jbaron@akamai.com> Cc: yrl.pp-manager.tt@hitachi.com Cc: Borislav Petkov <bpetkov@suse.de> Link: http://lkml.kernel.org/r/20130718114753.26675.18714.stgit@mhiramat-M0-7522 Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-07-19kprobes/x86: Use text_poke_bp() instead of text_poke_smp*()Masami Hiramatsu3-84/+23
Use text_poke_bp() for optimizing kprobes instead of text_poke_smp*(). Since the number of kprobes is usually not so large (<100) and text_poke_bp() is much lighter than text_poke_smp() [which uses stop_machine()], this just stops using batch processing. Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Reviewed-by: Jiri Kosina <jkosina@suse.cz> Cc: H. Peter Anvin <hpa@linux.intel.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Jason Baron <jbaron@akamai.com> Cc: yrl.pp-manager.tt@hitachi.com Cc: Borislav Petkov <bpetkov@suse.de> Link: http://lkml.kernel.org/r/20130718114750.26675.9174.stgit@mhiramat-M0-7522 Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-07-19kprobes/x86: Remove an incorrect comment about int3 in NMI/MCEMasami Hiramatsu1-10/+0
Remove a comment about an int3 issue in NMI/MCE, since commit: 3f3c8b8c4b2a ("x86: Add workaround to NMI iret woes") already fixed that. Keeping this incorrect comment can mislead developers. Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Reviewed-by: Jiri Kosina <jkosina@suse.cz> Cc: H. Peter Anvin <hpa@linux.intel.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Jason Baron <jbaron@akamai.com> Cc: yrl.pp-manager.tt@hitachi.com Cc: Borislav Petkov <bpetkov@suse.de> Link: http://lkml.kernel.org/r/20130718114747.26675.84110.stgit@mhiramat-M0-7522 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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