1 files changed, 25 insertions, 4 deletions

diff --git a/arch/ia64/kvm/process.c b/arch/ia64/kvm/process.c
index 800817307b7b..552d07724207 100644
--- a/arch/ia64/kvm/process.c
+++ b/arch/ia64/kvm/process.c
@@ -527,7 +527,8 @@ void reflect_interruption(u64 ifa, u64 isr, u64 iim,
         vector = vec2off[vec];
 
         if (!(vpsr & IA64_PSR_IC) && (vector != IA64_DATA_NESTED_TLB_VECTOR)) {
-                panic_vm(vcpu);
+                panic_vm(vcpu, "Interruption with vector :0x%lx occurs "
+                                                "with psr.ic = 0\n", vector);
                 return;
         }
 
@@ -586,7 +587,7 @@ static void set_pal_call_result(struct kvm_vcpu *vcpu)
                 vcpu_set_gr(vcpu, 10, p->u.pal_data.ret.v1, 0);
                 vcpu_set_gr(vcpu, 11, p->u.pal_data.ret.v2, 0);
         } else
-                panic_vm(vcpu);
+                panic_vm(vcpu, "Mis-set for exit reason!\n");
 }
 
 static void set_sal_call_data(struct kvm_vcpu *vcpu)
@@ -614,7 +615,7 @@ static void set_sal_call_result(struct kvm_vcpu *vcpu)
                 vcpu_set_gr(vcpu, 10, p->u.sal_data.ret.r10, 0);
                 vcpu_set_gr(vcpu, 11, p->u.sal_data.ret.r11, 0);
         } else
-                panic_vm(vcpu);
+                panic_vm(vcpu, "Mis-set for exit reason!\n");
 }
 
 void  kvm_ia64_handle_break(unsigned long ifa, struct kvm_pt_regs *regs,
@@ -680,7 +681,7 @@ static void generate_exirq(struct kvm_vcpu *vcpu)
         vpsr = VCPU(vcpu, vpsr);
         isr = vpsr & IA64_PSR_RI;
         if (!(vpsr & IA64_PSR_IC))
-                panic_vm(vcpu);
+                panic_vm(vcpu, "Trying to inject one IRQ with psr.ic=0\n");
         reflect_interruption(0, isr, 0, 12, regs); /* EXT IRQ */
 }
 
@@ -941,8 +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;
@@ -968,3 +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]);
+}