1. 09 2月, 2016 1 次提交
  2. 03 2月, 2016 1 次提交
  3. 01 2月, 2016 1 次提交
    • H
      x86/cpufeature: Use enum cpuid_leafs instead of magic numbers · 16aaa537
      Huaitong Han 提交于
      Most of the magic numbers in x86_capability[] have been converted to
      'enum cpuid_leafs', and this patch updates the remaining part.
      Signed-off-by: NHuaitong Han <huaitong.han@intel.com>
      Signed-off-by: NBorislav Petkov <bp@suse.de>
      Cc: Alexander Kuleshov <kuleshovmail@gmail.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Andy Lutomirski <luto@kernel.org>
      Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Brian Gerst <brgerst@gmail.com>
      Cc: David Vrabel <david.vrabel@citrix.com>
      Cc: Denys Vlasenko <dvlasenk@redhat.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Hector Marco-Gisbert <hecmargi@upv.es>
      Cc: Jiang Liu <jiang.liu@linux.intel.com>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Tony Luck <tony.luck@intel.com>
      Cc: Viresh Kumar <viresh.kumar@linaro.org>
      Cc: lguest@lists.ozlabs.org
      Cc: xen-devel@lists.xenproject.org
      Link: http://lkml.kernel.org/r/1453750913-4781-3-git-send-email-bp@alien8.deSigned-off-by: NIngo Molnar <mingo@kernel.org>
      16aaa537
  4. 29 1月, 2016 2 次提交
    • P
      perf/x86: De-obfuscate code · 8f04b853
      Peter Zijlstra 提交于
      Get rid of the 'onln' obfuscation.
      Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Vince Weaver <vincent.weaver@maine.edu>
      Signed-off-by: NIngo Molnar <mingo@kernel.org>
      8f04b853
    • P
      perf/x86: Fix uninitialized value usage · e01d8718
      Peter Zijlstra 提交于
      When calling intel_alt_er() with .idx != EXTRA_REG_RSP_* we will not
      initialize alt_idx and then use this uninitialized value to index an
      array.
      
      When that is not fatal, it can result in an infinite loop in its
      caller __intel_shared_reg_get_constraints(), with IRQs disabled.
      
      Alternative error modes are random memory corruption due to the
      cpuc->shared_regs->regs[] array overrun, which manifest in either
      get_constraints or put_constraints doing weird stuff.
      
      Only took 6 hours of painful debugging to find this. Neither GCC nor
      Smatch warnings flagged this bug.
      Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Kan Liang <kan.liang@intel.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Vince Weaver <vincent.weaver@maine.edu>
      Fixes: ae3f011f ("perf/x86/intel: Fix SLM MSR_OFFCORE_RSP1 valid_mask")
      Signed-off-by: NIngo Molnar <mingo@kernel.org>
      e01d8718
  5. 22 1月, 2016 1 次提交
  6. 21 1月, 2016 1 次提交
  7. 19 1月, 2016 2 次提交
  8. 16 1月, 2016 1 次提交
  9. 15 1月, 2016 15 次提交
  10. 14 1月, 2016 1 次提交
  11. 12 1月, 2016 6 次提交
    • M
      x86/reboot/quirks: Add iMac10,1 to pci_reboot_dmi_table[] · 2f0c0b2d
      Mario Kleiner 提交于
      Without the reboot=pci method, the iMac 10,1 simply
      hangs after printing "Restarting system" at the point
      when it should reboot. This fixes it.
      Signed-off-by: NMario Kleiner <mario.kleiner.de@gmail.com>
      Cc: <stable@vger.kernel.org>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Brian Gerst <brgerst@gmail.com>
      Cc: Dave Jones <davej@codemonkey.org.uk>
      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/1450466646-26663-1-git-send-email-mario.kleiner.de@gmail.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
      2f0c0b2d
    • B
      x86/boot: Hide local labels in verify_cpu() · aa042141
      Borislav Petkov 提交于
      ... from the final ELF image's symbol table as they're not
      really needed there.
      
      Before:
      
      $ readelf -a vmlinux | grep verify_cpu
          43: ffffffff810001a9     0 NOTYPE  LOCAL  DEFAULT    1 verify_cpu
          45: ffffffff8100028f     0 NOTYPE  LOCAL  DEFAULT    1 verify_cpu_no_longmode
          46: ffffffff810001de     0 NOTYPE  LOCAL  DEFAULT    1 verify_cpu_noamd
          47: ffffffff8100022b     0 NOTYPE  LOCAL  DEFAULT    1 verify_cpu_check
          48: ffffffff8100021c     0 NOTYPE  LOCAL  DEFAULT    1 verify_cpu_clear_xd
          49: ffffffff81000263     0 NOTYPE  LOCAL  DEFAULT    1 verify_cpu_sse_test
          50: ffffffff81000296     0 NOTYPE  LOCAL  DEFAULT    1 verify_cpu_sse_ok
      
      After:
      
      $ readelf -a vmlinux | grep verify_cpu
          43: ffffffff810001a9     0 NOTYPE  LOCAL  DEFAULT    1 verify_cpu
      
      No functionality change.
      Signed-off-by: NBorislav Petkov <bp@suse.de>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Brian Gerst <brgerst@gmail.com>
      Cc: Dave Hansen <dave.hansen@linux.intel.com>
      Cc: Denys Vlasenko <dvlasenk@redhat.com>
      Cc: Fenghua Yu <fenghua.yu@intel.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Link: http://lkml.kernel.org/r/1451860733-21163-1-git-send-email-bp@alien8.deSigned-off-by: NIngo Molnar <mingo@kernel.org>
      aa042141
    • Y
      x86/fpu: Disable AVX when eagerfpu is off · 394db20c
      yu-cheng yu 提交于
      When "eagerfpu=off" is given as a command-line input, the kernel
      should disable AVX support.
      
      The Task Switched bit used for lazy context switching does not
      support AVX. If AVX is enabled without eagerfpu context
      switching, one task's AVX state could become corrupted or leak
      to other tasks. This is a bug and has bad security implications.
      
      This only affects systems that have AVX/AVX2/AVX512 and this
      issue will be found only when one actually uses AVX/AVX2/AVX512
      _AND_ does eagerfpu=off.
      
      Reference: Intel Software Developer's Manual Vol. 3A
      
      Sec. 2.5 Control Registers:
      TS Task Switched bit (bit 3 of CR0) -- Allows the saving of the
      x87 FPU/ MMX/SSE/SSE2/SSE3/SSSE3/SSE4 context on a task switch
      to be delayed until an x87 FPU/MMX/SSE/SSE2/SSE3/SSSE3/SSE4
      instruction is actually executed by the new task.
      
      Sec. 13.4.1 Using the TS Flag to Control the Saving of the X87
      FPU and SSE State
      When the TS flag is set, the processor monitors the instruction
      stream for x87 FPU, MMX, SSE instructions. When the processor
      detects one of these instructions, it raises a
      device-not-available exeception (#NM) prior to executing the
      instruction.
      Signed-off-by: NYu-cheng Yu <yu-cheng.yu@intel.com>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Borislav Petkov <bp@suse.de>
      Cc: Dave Hansen <dave.hansen@linux.intel.com>
      Cc: Fenghua Yu <fenghua.yu@intel.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
      Cc: Ravi V. Shankar <ravi.v.shankar@intel.com>
      Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: yu-cheng yu <yu-cheng.yu@intel.com>
      Link: http://lkml.kernel.org/r/1452119094-7252-5-git-send-email-yu-cheng.yu@intel.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
      394db20c
    • Y
      x86/fpu: Disable MPX when eagerfpu is off · a5fe93a5
      yu-cheng yu 提交于
      This issue is a fallout from the command-line parsing move.
      
      When "eagerfpu=off" is given as a command-line input, the kernel
      should disable MPX support. The decision for turning off MPX was
      made in fpu__init_system_ctx_switch(), which is after the
      selection of the XSAVE format. This patch fixes it by getting
      that decision done earlier in fpu__init_system_xstate().
      Signed-off-by: NYu-cheng Yu <yu-cheng.yu@intel.com>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Borislav Petkov <bp@suse.de>
      Cc: Dave Hansen <dave.hansen@linux.intel.com>
      Cc: Fenghua Yu <fenghua.yu@intel.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
      Cc: Ravi V. Shankar <ravi.v.shankar@intel.com>
      Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: yu-cheng yu <yu-cheng.yu@intel.com>
      Link: http://lkml.kernel.org/r/1452119094-7252-4-git-send-email-yu-cheng.yu@intel.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
      a5fe93a5
    • Y
      x86/fpu: Disable XGETBV1 when no XSAVE · eb7c5f87
      yu-cheng yu 提交于
      When "noxsave" is given as a command-line input, the kernel
      should disable XGETBV1. This issue currently does not cause any
      actual problems. XGETBV1 is only useful if we have something
      using the 'init optimization' (i.e. xsaveopt, xsaves). We
      already clear both of those in fpu__xstate_clear_all_cpu_caps().
      But this is good for completeness.
      Signed-off-by: NYu-cheng Yu <yu-cheng.yu@intel.com>
      Reviewed-by: NDave Hansen <dave.hansen@intel.com>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Borislav Petkov <bp@suse.de>
      Cc: Dave Hansen <dave.hansen@linux.intel.com>
      Cc: Fenghua Yu <fenghua.yu@intel.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
      Cc: Ravi V. Shankar <ravi.v.shankar@intel.com>
      Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: yu-cheng yu <yu-cheng.yu@intel.com>
      Link: http://lkml.kernel.org/r/1452119094-7252-3-git-send-email-yu-cheng.yu@intel.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
      eb7c5f87
    • Y
      x86/fpu: Fix early FPU command-line parsing · 4f81cbaf
      yu-cheng yu 提交于
      The function fpu__init_system() is executed before
      parse_early_param(). This causes wrong FPU configuration. This
      patch fixes this issue by parsing boot_command_line in the
      beginning of fpu__init_system().
      
      With all four patches in this series, each parameter disables
      features as the following:
      
      eagerfpu=off: eagerfpu, avx, avx2, avx512, mpx
      no387: fpu
      nofxsr: fxsr, fxsropt, xmm
      noxsave: xsave, xsaveopt, xsaves, xsavec, avx, avx2, avx512,
      mpx, xgetbv1 noxsaveopt: xsaveopt
      noxsaves: xsaves
      Signed-off-by: NYu-cheng Yu <yu-cheng.yu@intel.com>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Borislav Petkov <bp@suse.de>
      Cc: Dave Hansen <dave.hansen@linux.intel.com>
      Cc: Fenghua Yu <fenghua.yu@intel.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
      Cc: Ravi V. Shankar <ravi.v.shankar@intel.com>
      Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: yu-cheng yu <yu-cheng.yu@intel.com>
      Link: http://lkml.kernel.org/r/1452119094-7252-2-git-send-email-yu-cheng.yu@intel.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
      4f81cbaf
  12. 06 1月, 2016 8 次提交