From d3714010c307d26df251c45be9cd12ab6d41f0c4 Mon Sep 17 00:00:00 2001 From: Marcelo Tosatti Date: Tue, 25 Feb 2014 22:44:54 -0300 Subject: [PATCH] KVM: x86: emulator_cmpxchg_emulated should mark_page_dirty emulator_cmpxchg_emulated writes to guest memory, therefore it should update the dirty bitmap accordingly. Signed-off-by: Marcelo Tosatti Reviewed-by: Xiao Guangrong Signed-off-by: Paolo Bonzini --- arch/x86/kvm/x86.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 6530019116b0..4cca45853dfe 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -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; -- 2.20.1