diff options
| author | Joerg Roedel <joerg.roedel@amd.com> | 2007-01-26 09:56:42 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-01-26 22:50:57 +0100 |
| commit | 46fe4ddd9dbb15305ab9b458e6cfa4dd47ac3e47 (patch) | |
| tree | d7a7d0443d519f7de0b6c5157cf610726b4ab0bf /drivers/kvm | |
| parent | [PATCH] KVM: MMU: Report nx faults to the guest (diff) | |
| download | linux-46fe4ddd9dbb15305ab9b458e6cfa4dd47ac3e47.tar.xz linux-46fe4ddd9dbb15305ab9b458e6cfa4dd47ac3e47.zip | |
[PATCH] KVM: SVM: Propagate cpu shutdown events to userspace
This patch implements forwarding of SHUTDOWN intercepts from the guest on to
userspace on AMD SVM. A SHUTDOWN event occurs when the guest produces a
triple fault (e.g. on reboot). This also fixes the bug that a guest reboot
actually causes a host reboot under some circumstances.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/kvm')
| -rw-r--r-- | drivers/kvm/svm.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c index 717aabb012cc..9c70ff65e6b7 100644 --- a/drivers/kvm/svm.c +++ b/drivers/kvm/svm.c @@ -502,6 +502,7 @@ static void init_vmcb(struct vmcb *vmcb) (1ULL << INTERCEPT_IOIO_PROT) | (1ULL << INTERCEPT_MSR_PROT) | (1ULL << INTERCEPT_TASK_SWITCH) | + (1ULL << INTERCEPT_SHUTDOWN) | (1ULL << INTERCEPT_VMRUN) | (1ULL << INTERCEPT_VMMCALL) | (1ULL << INTERCEPT_VMLOAD) | @@ -892,6 +893,19 @@ static int pf_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) return 0; } +static int shutdown_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) +{ + /* + * VMCB is undefined after a SHUTDOWN intercept + * so reinitialize it. + */ + memset(vcpu->svm->vmcb, 0, PAGE_SIZE); + init_vmcb(vcpu->svm->vmcb); + + kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; + return 0; +} + static int io_get_override(struct kvm_vcpu *vcpu, struct vmcb_seg **seg, int *addr_override) @@ -1249,6 +1263,7 @@ static int (*svm_exit_handlers[])(struct kvm_vcpu *vcpu, [SVM_EXIT_IOIO] = io_interception, [SVM_EXIT_MSR] = msr_interception, [SVM_EXIT_TASK_SWITCH] = task_switch_interception, + [SVM_EXIT_SHUTDOWN] = shutdown_interception, [SVM_EXIT_VMRUN] = invalid_op_interception, [SVM_EXIT_VMMCALL] = invalid_op_interception, [SVM_EXIT_VMLOAD] = invalid_op_interception, |