mirror of https://gitee.com/openkylin/linux.git
KVM: nSVM: restore clobbered INT_CTL fields after clearing VINTR
Restore the INT_CTL value from the guest's VMCB once we've stopped using it, so that virtual interrupts can be injected as requested by L1. V_TPR is up-to-date however, and it can change if the guest writes to CR8, so keep it. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -1365,9 +1365,17 @@ static void svm_set_vintr(struct vcpu_svm *svm)
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static void svm_clear_vintr(struct vcpu_svm *svm)
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{
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const u32 mask = V_TPR_MASK | V_GIF_ENABLE_MASK | V_GIF_MASK | V_INTR_MASKING_MASK;
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clr_intercept(svm, INTERCEPT_VINTR);
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svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
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/* Drop int_ctl fields related to VINTR injection. */
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svm->vmcb->control.int_ctl &= mask;
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if (is_guest_mode(&svm->vcpu)) {
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WARN_ON((svm->vmcb->control.int_ctl & V_TPR_MASK) !=
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(svm->nested.ctl.int_ctl & V_TPR_MASK));
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svm->vmcb->control.int_ctl |= svm->nested.ctl.int_ctl & ~mask;
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}
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mark_dirty(svm->vmcb, VMCB_INTR);
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}
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