KVM: x86: mark hyper-v hypercall page as dirty

Signed-off-by: Vadim Rozenfeld <vrozenfe@redhat.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 0c76f7cfdb32c0f9161ea08427f9144d332eaca5..0fa9c84e36cb10ed4163e7b2ef9db2970c3f029f 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1840,6 +1840,7 @@ static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data)
                if (__copy_to_user((void __user *)addr, instructions, 4))
                        return 1;
                kvm->arch.hv_hypercall = data;
+               mark_page_dirty(kvm, gfn);
                break;
        }
        case HV_X64_MSR_REFERENCE_TSC: {