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KVM: x86: mark hyper-v vapic assist 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>
This commit is contained in:
Vadim Rozenfeld 2014-01-23 18:12:53 +11:00 committed by Paolo Bonzini
parent b94b64c9a7
commit b3af1e889e
1 changed files with 4 additions and 2 deletions
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6
arch/x86/kvm/x86.c
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@ -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: