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KVM: SVM: copy instruction bytes from VMCB

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In case of a nested page fault or an intercepted #PF newer SVM
implementations provide a copy of the faulting instruction bytes
in the VMCB.
Use these bytes to feed the instruction emulator and avoid the costly
guest instruction fetch in this case.

Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Andre Przywara 2010-12-21 11:12:07 +01:00 • committed by Avi Kivity
parent df4f310856
commit dc25e89e07
8 changed files with 26 additions and 15 deletions
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4
arch/x86/kvm/vmx.c
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@ -3055,7 +3055,7 @@ static int handle_exception(struct kvm_vcpu *vcpu)
if (kvm_event_needs_reinjection(vcpu))
kvm_mmu_unprotect_page_virt(vcpu, cr2);
return kvm_mmu_page_fault(vcpu, cr2, error_code);
return kvm_mmu_page_fault(vcpu, cr2, error_code, NULL, 0);
}
if (vmx->rmode.vm86_active &&
@ -3502,7 +3502,7 @@ static int handle_ept_violation(struct kvm_vcpu *vcpu)
gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
trace_kvm_page_fault(gpa, exit_qualification);
return kvm_mmu_page_fault(vcpu, gpa, exit_qualification & 0x3);
return kvm_mmu_page_fault(vcpu, gpa, exit_qualification & 0x3, NULL, 0);
}
static u64 ept_rsvd_mask(u64 spte, int level)