17 Dec, 2009

1 commit

• 6ede31e03   x86, msr: msrs_alloc/free for CONFIG_SMP=n ... Browse Code »

  Randy Dunlap reported the following build error:

  "When CONFIG_SMP=n, CONFIG_X86_MSR=m:

  ERROR: "msrs_free" [drivers/edac/amd64_edac_mod.ko] undefined!
  ERROR: "msrs_alloc" [drivers/edac/amd64_edac_mod.ko] undefined!"

  This is due to the fact that is conditioned on
  CONFIG_SMP and in the UP case we have only the stubs in the header.
  Fork off SMP functionality into a new file (msr-smp.c) and build
  msrs_{alloc,free} unconditionally.

  Reported-by: Randy Dunlap
  Cc: H. Peter Anvin
  Signed-off-by: Borislav Petkov
  LKML-Reference:
  Signed-off-by: H. Peter Anvin

  Borislav Petkov

  2009-12-17 07:36:32 +0800  

12 Dec, 2009

1 commit

• 505422517   x86, msr: Add support for non-contiguous cpumasks ... Browse Code »

  The current rd/wrmsr_on_cpus helpers assume that the supplied
  cpumasks are contiguous. However, there are machines out there
  like some K8 multinode Opterons which have a non-contiguous core
  enumeration on each node (e.g. cores 0,2 on node 0 instead of 0,1), see
  http://www.gossamer-threads.com/lists/linux/kernel/1160268.

  This patch fixes out-of-bounds writes (see URL above) by adding per-CPU
  msr structs which are used on the respective cores.

  Additionally, two helpers, msrs_{alloc,free}, are provided for use by
  the callers of the MSR accessors.

  Cc: H. Peter Anvin
  Cc: Mauro Carvalho Chehab
  Cc: Aristeu Rozanski
  Cc: Randy Dunlap
  Cc: Doug Thompson
  Signed-off-by: Borislav Petkov
  LKML-Reference:
  Signed-off-by: H. Peter Anvin

  Borislav Petkov

  2009-12-12 02:59:21 +0800  

15 Sep, 2009

1 commit

• b8a475414   x86, msr: Unify rdmsr_on_cpus/wrmsr_on_cpus ... Browse Code »

  Since rdmsr_on_cpus and wrmsr_on_cpus are almost identical, unify them
  into a common __rwmsr_on_cpus helper thus avoiding code duplication.

  While at it, convert cpumask_t's to const struct cpumask *.

  Signed-off-by: Borislav Petkov
  Signed-off-by: H. Peter Anvin
  Signed-off-by: Ingo Molnar

  Borislav Petkov

  2009-09-15 15:15:54 +0800  

01 Sep, 2009

1 commit

• 8b956bf1f   x86, msr: Create _on_cpu helpers for {rw,wr}msr_safe_regs() ... Browse Code »

  Create _on_cpu helpers for {rw,wr}msr_safe_regs() analogously with the
  other MSR functions. This will be necessary to add support for these
  to the MSR driver.

  Signed-off-by: H. Peter Anvin
  Cc: Borislav Petkov

  H. Peter Anvin

  2009-09-01 07:15:57 +0800  

04 Aug, 2009

1 commit

• bab9a3da9   x86, msr: execute on the correct CPU subset ... Browse Code »

  Make rdmsr_on_cpus/wrmsr_on_cpus execute on the current CPU only if it
  is in the supplied bitmask.

  Signed-off-by: Borislav Petkov
  Signed-off-by: H. Peter Anvin

  Borislav Petkov

  2009-08-04 05:48:13 +0800  

10 Jun, 2009

2 commits

• b034c19f9   x86: MSR: add methods for writing of an MSR on several CPUs ... Browse Code »

  Provide for concurrent MSR writes on all the CPUs in the cpumask. Also,
  add a temporary workaround for smp_call_function_many which skips the
  CPU we're executing on.

  Bart: zero out rv struct which is allocated on stack.

  CC: H. Peter Anvin
  Signed-off-by: Borislav Petkov
  Signed-off-by: Bartlomiej Zolnierkiewicz

  Borislav Petkov

  2009-06-10 18:18:43 +0800  
• 6bc1096d7   x86: MSR: add a struct representation of an MSR ... Browse Code »

  Add a struct representing a 64bit MSR pair consisting of a low and high
  register part and convert msr_info to use it. Also, rename msr-on-cpu.c
  to msr.c.

  Side note: Put the cpumask.h include in __KERNEL__ space thus fixing an
  allmodconfig build failure in the headers_check target.

  CC: H. Peter Anvin
  Signed-off-by: Borislav Petkov

  Borislav Petkov

  2009-06-10 18:18:42 +0800