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| author | Gleb Natapov <gleb@redhat.com> | 2010-10-14 09:22:52 (GMT) |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-01-12 09:23:16 (GMT) |
| commit | 631bc4878220932fe67fc46fc7cf7cccdb1ec597 (patch) | |
| tree | ac588182d02308a004d45a9c3ae6834d096e263d /arch/x86/kernel/entry_32.S | |
| parent | fd10cde9294f73eeccbc16f3fec1ae6cde7b800c (diff) | |
| download | linux-fsl-qoriq-631bc4878220932fe67fc46fc7cf7cccdb1ec597.tar.xz | |
KVM: Handle async PF in a guest.
When async PF capability is detected hook up special page fault handler
that will handle async page fault events and bypass other page faults to
regular page fault handler. Also add async PF handling to nested SVM
emulation. Async PF always generates exit to L1 where vcpu thread will
be scheduled out until page is available.
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/kernel/entry_32.S')
| -rw-r--r-- | arch/x86/kernel/entry_32.S | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S index 591e601..c8b4efa 100644 --- a/arch/x86/kernel/entry_32.S +++ b/arch/x86/kernel/entry_32.S @@ -1406,6 +1406,16 @@ ENTRY(general_protection) CFI_ENDPROC END(general_protection) +#ifdef CONFIG_KVM_GUEST +ENTRY(async_page_fault) + RING0_EC_FRAME + pushl $do_async_page_fault + CFI_ADJUST_CFA_OFFSET 4 + jmp error_code + CFI_ENDPROC +END(apf_page_fault) +#endif + /* * End of kprobes section */ |