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KVM: SVM: Check for nested vmrun intercept before emulating vmrun

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This patch lets the nested vmrun fail if the L1 hypervisor
has not intercepted vmrun. This fixes the "vmrun intercept
check" unit test.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Joerg Roedel 2010-08-02 16:46:44 +02:00 committed by Avi Kivity
parent 4132779b17
commit 52c65a30a5
1 changed files with 19 additions and 0 deletions
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19
arch/x86/kvm/svm.c
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@ -2014,6 +2014,14 @@ static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
return true;
}
static bool nested_vmcb_checks(struct vmcb *vmcb)
{
if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0)
return false;
return true;
}
static bool nested_svm_vmrun(struct vcpu_svm *svm)
{
struct vmcb *nested_vmcb;
@ -2028,6 +2036,17 @@ static bool nested_svm_vmrun(struct vcpu_svm *svm)
if (!nested_vmcb)
return false;
if (!nested_vmcb_checks(nested_vmcb)) {
nested_vmcb->control.exit_code = SVM_EXIT_ERR;
nested_vmcb->control.exit_code_hi = 0;
nested_vmcb->control.exit_info_1 = 0;
nested_vmcb->control.exit_info_2 = 0;
nested_svm_unmap(page);
return false;
}
trace_kvm_nested_vmrun(svm->vmcb->save.rip - 3, vmcb_gpa,
nested_vmcb->save.rip,
nested_vmcb->control.int_ctl,