1. 28 Sep, 2011 2 commits
    • Jan Beulich's avatar
      x86-64: Fix CFI data for interrupt frames · eab9e613
      Jan Beulich authored
      The patch titled "x86: Don't use frame pointer to save old stack
      on irq entry" did not properly adjust CFI directives, so this
      patch is a follow-up to that one.
      
      With the old stack pointer no longer stored in a callee-saved
      register (plus some offset), we now have to use a CFA expression
      to describe the memory location where it is being found. This
      requires the use of .cfi_escape (allowing arbitrary byte streams
      to be emitted into .eh_frame), as there is no
      .cfi_def_cfa_expression (which also cannot reasonably be
      expected, as it would require a full expression parser).
      Signed-off-by: default avatarJan Beulich <jbeulich@suse.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Link: http://lkml.kernel.org/r/4E8360200200007800058467@nat28.tlf.novell.comSigned-off-by: default avatarIngo Molnar <mingo@elte.hu>
      eab9e613
    • Jan Beulich's avatar
      x86-64: Don't apply destructive erratum workaround on unaffected CPUs · e05139f2
      Jan Beulich authored
      Erratum 93 applies to AMD K8 CPUs only, and its workaround
      (forcing the upper 32 bits of %rip to all get set under certain
      conditions) is actually getting in the way of analyzing page
      faults occurring during EFI physical mode runtime calls (in
      particular the page table walk shown is completely unrelated to
      the actual fault). This is because typically EFI runtime code
      lives in the space between 2G and 4G, which - modulo the above
      manipulation - is likely to overlap with the kernel or modules
      area.
      
      While even for the other errata workarounds their taking effect
      could be limited to just the affected CPUs, none of them appears
      to be destructive, and they're generally getting called only
      outside of performance critical paths, so they're being left
      untouched.
      Signed-off-by: default avatarJan Beulich <jbeulich@suse.com>
      Link: http://lkml.kernel.org/r/4E835FE30200007800058464@nat28.tlf.novell.comSigned-off-by: default avatarIngo Molnar <mingo@elte.hu>
      e05139f2
  2. 27 Sep, 2011 6 commits
  3. 26 Sep, 2011 14 commits
  4. 25 Sep, 2011 5 commits
  5. 24 Sep, 2011 1 commit
  6. 23 Sep, 2011 12 commits