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KVM: x86: get_msr support for HV_X64_MSR_APIC_ASSIST_PAGE

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"get" support for the HV_X64_MSR_APIC_ASSIST_PAGE msr was missing, even
though it is explicitly enumerated as something the vmm should save in
msrs_to_save and reported to userland via the KVM_GET_MSR_INDEX_LIST
ioctl.

Add "get" support for HV_X64_MSR_APIC_ASSIST_PAGE.  We simply return the
guest visible value of this register, which seems to be correct as a set
on the register is validated for us already.

Signed-off-by: Mike Waychison <mikew@google.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Mike Waychison 2011-07-21 15:38:10 -07:00 • committed by Avi Kivity
parent 2b3c246a68
commit 14fa67ee95
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kvm/x86.c
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@ -1825,6 +1825,8 @@ static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata); return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata);
case HV_X64_MSR_TPR: case HV_X64_MSR_TPR:
return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata); return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata);
case HV_X64_MSR_APIC_ASSIST_PAGE:
return vcpu->arch.hv_vapic;
default: default:
pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
return 1; return 1;