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KVM: x86: emulator_cmpxchg_emulated should mark_page_dirty

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emulator_cmpxchg_emulated writes to guest memory, therefore it should
update the dirty bitmap accordingly.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Reviewed-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Marcelo Tosatti 2014-02-25 22:44:54 -03:00 committed by Paolo Bonzini
parent 390bd528ae
commit d3714010c3
1 changed files with 1 additions and 0 deletions
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arch/x86/kvm/x86.c
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@ -4399,6 +4399,7 @@ static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt,
if (!exchanged)
return X86EMUL_CMPXCHG_FAILED;
mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT);
kvm_mmu_pte_write(vcpu, gpa, new, bytes);
return X86EMUL_CONTINUE;