KVM: ia64: Add some debug points to provide crash infomation

Use printk infrastructure to print out some debug info once VM crashes.

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

1 files changed, 15 insertions, 23 deletions

diff --git a/arch/ia64/kvm/mmio.c b/arch/ia64/kvm/mmio.c
index 7f1a858bc69f..21f63fffc379 100644
--- a/arch/ia64/kvm/mmio.c
+++ b/arch/ia64/kvm/mmio.c
@@ -66,31 +66,25 @@ void lsapic_write(struct kvm_vcpu *v, unsigned long addr,
 
         switch (addr) {
         case PIB_OFST_INTA:
-                /*panic_domain(NULL, "Undefined write on PIB INTA\n");*/
-                panic_vm(v);
+                panic_vm(v, "Undefined write on PIB INTA\n");
                 break;
         case PIB_OFST_XTP:
                 if (length == 1) {
                         vlsapic_write_xtp(v, val);
                 } else {
-                        /*panic_domain(NULL,
-                        "Undefined write on PIB XTP\n");*/
-                        panic_vm(v);
+                        panic_vm(v, "Undefined write on PIB XTP\n");
                 }
                 break;
         default:
                 if (PIB_LOW_HALF(addr)) {
-                        /*lower half */
+                        /*Lower half */
                         if (length != 8)
-                                /*panic_domain(NULL,
-                                "Can't LHF write with size %ld!\n",
-                                length);*/
-                                panic_vm(v);
+                                panic_vm(v, "Can't LHF write with size %ld!\n",
+                                                length);
                         else
                                 vlsapic_write_ipi(v, addr, val);
-                } else {   /*   upper half
-                                printk("IPI-UHF write %lx\n",addr);*/
-                        panic_vm(v);
+                } else {   /*Upper half */
+                        panic_vm(v, "IPI-UHF write %lx\n", addr);
                 }
                 break;
         }
@@ -108,22 +102,18 @@ unsigned long lsapic_read(struct kvm_vcpu *v, unsigned long addr,
                 if (length == 1) /* 1 byte load */
                         ; /* There is no i8259, there is no INTA access*/
                 else
-                        /*panic_domain(NULL,"Undefined read on PIB INTA\n"); */
-                        panic_vm(v);
+                        panic_vm(v, "Undefined read on PIB INTA\n");
 
                 break;
         case PIB_OFST_XTP:
                 if (length == 1) {
                         result = VLSAPIC_XTP(v);
-                        /* printk("read xtp %lx\n", result); */
                 } else {
-                        /*panic_domain(NULL,
-                        "Undefined read on PIB XTP\n");*/
-                        panic_vm(v);
+                        panic_vm(v, "Undefined read on PIB XTP\n");
                 }
                 break;
         default:
-                panic_vm(v);
+                panic_vm(v, "Undefined addr access for lsapic!\n");
                 break;
         }
         return result;
@@ -162,7 +152,7 @@ static void mmio_access(struct kvm_vcpu *vcpu, u64 src_pa, u64 *dest,
                         /* it's necessary to ensure zero extending */
                         *dest = p->u.ioreq.data & (~0UL >> (64-(s*8)));
         } else
-                panic_vm(vcpu);
+                panic_vm(vcpu, "Unhandled mmio access returned!\n");
 out:
         local_irq_restore(psr);
         return ;
@@ -324,7 +314,9 @@ void emulate_io_inst(struct kvm_vcpu *vcpu, u64 padr, u64 ma)
                 return;
         } else {
                 inst_type = -1;
-                panic_vm(vcpu);
+                panic_vm(vcpu, "Unsupported MMIO access instruction! \
+                                Bunld[0]=0x%lx, Bundle[1]=0x%lx\n",
+                                bundle.i64[0], bundle.i64[1]);
         }
 
         size = 1 << size;
@@ -335,7 +327,7 @@ void emulate_io_inst(struct kvm_vcpu *vcpu, u64 padr, u64 ma)
                 if (inst_type == SL_INTEGER)
                         vcpu_set_gr(vcpu, inst.M1.r1, data, 0);
                 else
-                        panic_vm(vcpu);
+                        panic_vm(vcpu, "Unsupported instruction type!\n");
 
         }
         vcpu_increment_iip(vcpu);