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>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 0c76f7cfdb32..0fa9c84e36cb 100644
--- 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: {