diff options
| author | Joerg Roedel <joerg.roedel@amd.com> | 2007-12-06 21:02:25 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-01-30 17:53:21 +0200 |
| commit | 1d075434149c38d457c30d1f11d9c39210b0bb79 (patch) | |
| tree | bb824281fe4c5b07877adbaa4793b8b4038b37d0 | |
| parent | e833240f3c1b0b415efb14eaa102718769d5f063 (diff) | |
KVM: SVM: Exit to userspace if write to cr8 and not using in-kernel apic
With this patch KVM on SVM will exit to userspace if the guest writes to CR8
and the in-kernel APIC is disabled.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Markus Rechberger <markus.rechberger@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
| -rw-r--r-- | drivers/kvm/svm.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c index 143d271d443..442ca818c5a 100644 --- a/drivers/kvm/svm.c +++ b/drivers/kvm/svm.c @@ -1048,6 +1048,15 @@ static int emulate_on_interception(struct vcpu_svm *svm, return 1; } +static int cr8_write_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) +{ + emulate_instruction(&svm->vcpu, NULL, 0, 0, 0); + if (irqchip_in_kernel(svm->vcpu.kvm)) + return 1; + kvm_run->exit_reason = KVM_EXIT_SET_TPR; + return 0; +} + static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data) { struct vcpu_svm *svm = to_svm(vcpu); @@ -1202,7 +1211,7 @@ static int (*svm_exit_handlers[])(struct vcpu_svm *svm, [SVM_EXIT_WRITE_CR0] = emulate_on_interception, [SVM_EXIT_WRITE_CR3] = emulate_on_interception, [SVM_EXIT_WRITE_CR4] = emulate_on_interception, - [SVM_EXIT_WRITE_CR8] = emulate_on_interception, + [SVM_EXIT_WRITE_CR8] = cr8_write_interception, [SVM_EXIT_READ_DR0] = emulate_on_interception, [SVM_EXIT_READ_DR1] = emulate_on_interception, [SVM_EXIT_READ_DR2] = emulate_on_interception, |