KVM: ia64: Add handler for crashed vmm

Since vmm runs in an isolated address space and it is just a copy
of host's kvm-intel module, so once vmm crashes, we just crash all guests
running on it instead of crashing whole kernel.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/arch/ia64/kvm/process.c b/arch/ia64/kvm/process.c
index cefc349ce354..552d07724207 100644
--- a/arch/ia64/kvm/process.c
+++ b/arch/ia64/kvm/process.c
@@ -942,8 +942,20 @@ static void vcpu_do_resume(struct kvm_vcpu *vcpu)
         ia64_set_pta(vcpu->arch.vhpt.pta.val);
 }
 
+static void vmm_sanity_check(struct kvm_vcpu *vcpu)
+{
+        struct exit_ctl_data *p = &vcpu->arch.exit_data;
+
+        if (!vmm_sanity && p->exit_reason != EXIT_REASON_DEBUG) {
+                panic_vm(vcpu, "Failed to do vmm sanity check,"
+                        "it maybe caused by crashed vmm!!\n\n");
+        }
+}
+
 static void kvm_do_resume_op(struct kvm_vcpu *vcpu)
 {
+        vmm_sanity_check(vcpu); /*Guarantee vcpu runing on healthy vmm!*/
+
         if (test_and_clear_bit(KVM_REQ_RESUME, &vcpu->requests)) {
                 vcpu_do_resume(vcpu);
                 return;
@@ -969,3 +981,11 @@ void vmm_transition(struct kvm_vcpu *vcpu)
                                                 1, 0, 0, 0, 0, 0);
         kvm_do_resume_op(vcpu);
 }
+
+void vmm_panic_handler(u64 vec)
+{
+        struct kvm_vcpu *vcpu = current_vcpu;
+        vmm_sanity = 0;
+        panic_vm(vcpu, "Unexpected interruption occurs in VMM, vector:0x%lx\n",
+                        vec2off[vec]);
+}