diff mbox

[2/2] mark hyper-v vapic assist page as dirty

Message ID 1390461173-3920-3-git-send-email-vrozenfe@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Vadim Rozenfeld Jan. 23, 2014, 7:12 a.m. UTC 
Signed-off-by: Vadim Rozenfeld <vrozenfe@redhat.com>
---
 arch/x86/kvm/x86.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index e8599ed..cd8a41f 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1869,19 +1869,21 @@  static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data)
 {
 	switch (msr) {
 	case HV_X64_MSR_APIC_ASSIST_PAGE: {
+		u64 gfn;
 		unsigned long addr;
 
 		if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) {
 			vcpu->arch.hv_vapic = data;
 			break;
 		}
-		addr = gfn_to_hva(vcpu->kvm, data >>
-				  HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT);
+		gfn = data >> HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT;
+		addr = gfn_to_hva(vcpu->kvm, gfn);
 		if (kvm_is_error_hva(addr))
 			return 1;
 		if (__clear_user((void __user *)addr, PAGE_SIZE))
 			return 1;
 		vcpu->arch.hv_vapic = data;
+		mark_page_dirty(vcpu->kvm, gfn);
 		break;
 	}
 	case HV_X64_MSR_EOI: