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KVM: x86: No error-code on real-mode exceptions 

Real-mode exceptions do not deliver error code. As can be seen in Intel SDM
volume 2, real-mode exceptions do not have parentheses, which indicate
error-code.  To avoid significant changes of the code, the error code is
"removed" during exception queueing.

Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Nadav Amit 2014-11-02 11:54:42 +02:00 committed by Paolo Bonzini
parent 5b38ab877e
commit 3ffb24681c
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kvm/x86.c
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@ -353,6 +353,8 @@ static void kvm_multiple_exception(struct kvm_vcpu *vcpu,
if (!vcpu->arch.exception.pending) { if (!vcpu->arch.exception.pending) {
queue: queue:
if (has_error && !is_protmode(vcpu))
has_error = false;
vcpu->arch.exception.pending = true; vcpu->arch.exception.pending = true;
vcpu->arch.exception.has_error_code = has_error; vcpu->arch.exception.has_error_code = has_error;
vcpu->arch.exception.nr = nr; vcpu->arch.exception.nr = nr;