From b3af1e889ec4909f6b48dabd19a311d9c9f8d58e Mon Sep 17 00:00:00 2001 From: Vadim Rozenfeld Date: Thu, 23 Jan 2014 18:12:53 +1100 Subject: KVM: x86: mark hyper-v vapic assist page as dirty Signed-off-by: Vadim Rozenfeld Reviewed-by: Marcelo Tosatti Signed-off-by: Paolo Bonzini --- arch/x86/kvm/x86.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 0fa9c84e36c..dc11b4f9857 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: -- cgit v1.2.3-70-g09d2