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KVM: SVM: Check for nested intercepts on NMI injection 

This patch implements the NMI intercept checking for nested
svm.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Joerg Roedel 2010-02-24 18:59:12 +01:00 committed by Avi Kivity
parent 0e5cbe368b
commit 887f500ca1
1 changed files with 20 additions and 3 deletions
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23
arch/x86/kvm/svm.c
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@ -1486,6 +1486,21 @@ static inline bool nested_svm_intr(struct vcpu_svm *svm)
return true;
}
/* This function returns true if it is save to enable the nmi window */
static inline bool nested_svm_nmi(struct vcpu_svm *svm)
{
if (!is_nested(svm))
return true;
if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI)))
return true;
svm->vmcb->control.exit_code = SVM_EXIT_NMI;
svm->nested.exit_required = true;
return false;
}
static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page)
{
struct page *page;
@ -2687,9 +2702,11 @@ static void enable_nmi_window(struct kvm_vcpu *vcpu)
* Something prevents NMI from been injected. Single step over possible
* problem (IRET or exception injection or interrupt shadow)
*/
svm->nmi_singlestep = true;
svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
update_db_intercept(vcpu);
if (gif_set(svm) && nested_svm_nmi(svm)) {
svm->nmi_singlestep = true;
svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
update_db_intercept(vcpu);
}
}
static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)