KVM: Fix load_guest_segment_descriptor() to inject page fault

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This patch injects page fault when reading descriptor in
load_guest_segment_descriptor() fails with FAULT.

Effects of this injection: This function is used by
kvm_load_segment_descriptor() which is necessary for the
following instructions:

 - mov seg,r/m16
 - jmp far
 - pop ?s

This patch makes it possible to emulate the page faults
generated by these instructions. But be sure that unless
we change the kvm_load_segment_descriptor()'s ret value
propagation this patch has no effect.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

...

This commit is contained in:

Takuya Yoshikawa 2010-02-18 12:15:00 +02:00 • committed by Marcelo Tosatti

parent 8b9f44140b

commit 6f550484a1

1 changed files with 10 additions and 3 deletions

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arch/x86/kvm/x86.c

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