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, 66 insertions, 5 deletions

diff --git a/arch/ia64/kvm/vcpu.c b/arch/ia64/kvm/vcpu.c
index a528d70..ecd526b 100644
--- a/arch/ia64/kvm/vcpu.c
+++ b/arch/ia64/kvm/vcpu.c
@@ -1651,7 +1651,8 @@ void vcpu_set_psr(struct kvm_vcpu *vcpu, unsigned long val)
 	 * Otherwise panic
 	 */
 	if (val & (IA64_PSR_PK | IA64_PSR_IS | IA64_PSR_VM))
-		panic_vm(vcpu);
+		panic_vm(vcpu, "Only support guests with vpsr.pk =0 \
+				& vpsr.is=0\n");
 
 	/*
 	 * For those IA64_PSR bits: id/da/dd/ss/ed/ia
@@ -2104,7 +2105,7 @@ void kvm_init_all_rr(struct kvm_vcpu *vcpu)
 
 	if (is_physical_mode(vcpu)) {
 		if (vcpu->arch.mode_flags & GUEST_PHY_EMUL)
-			panic_vm(vcpu);
+			panic_vm(vcpu, "Machine Status conflicts!\n");
 
 		ia64_set_rr((VRN0 << VRN_SHIFT), vcpu->arch.metaphysical_rr0);
 		ia64_dv_serialize_data();
@@ -2153,10 +2154,70 @@ int vmm_entry(void)
 	return 0;
 }
 
-void panic_vm(struct kvm_vcpu *v)
-{
+static void kvm_show_registers(struct kvm_pt_regs *regs)
+{
+	unsigned long ip = regs->cr_iip + ia64_psr(regs)->ri;
+
+	struct kvm_vcpu *vcpu = current_vcpu;
+	if (vcpu != NULL)
+		printk("vcpu 0x%p vcpu %d\n",
+		       vcpu, vcpu->vcpu_id);
+
+	printk("psr : %016lx ifs : %016lx ip  : [<%016lx>]\n",
+	       regs->cr_ipsr, regs->cr_ifs, ip);
+
+	printk("unat: %016lx pfs : %016lx rsc : %016lx\n",
+	       regs->ar_unat, regs->ar_pfs, regs->ar_rsc);
+	printk("rnat: %016lx bspstore: %016lx pr  : %016lx\n",
+	       regs->ar_rnat, regs->ar_bspstore, regs->pr);
+	printk("ldrs: %016lx ccv : %016lx fpsr: %016lx\n",
+	       regs->loadrs, regs->ar_ccv, regs->ar_fpsr);
+	printk("csd : %016lx ssd : %016lx\n", regs->ar_csd, regs->ar_ssd);
+	printk("b0  : %016lx b6  : %016lx b7  : %016lx\n", regs->b0,
+							regs->b6, regs->b7);
+	printk("f6  : %05lx%016lx f7  : %05lx%016lx\n",
+	       regs->f6.u.bits[1], regs->f6.u.bits[0],
+	       regs->f7.u.bits[1], regs->f7.u.bits[0]);
+	printk("f8  : %05lx%016lx f9  : %05lx%016lx\n",
+	       regs->f8.u.bits[1], regs->f8.u.bits[0],
+	       regs->f9.u.bits[1], regs->f9.u.bits[0]);
+	printk("f10 : %05lx%016lx f11 : %05lx%016lx\n",
+	       regs->f10.u.bits[1], regs->f10.u.bits[0],
+	       regs->f11.u.bits[1], regs->f11.u.bits[0]);
+
+	printk("r1  : %016lx r2  : %016lx r3  : %016lx\n", regs->r1,
+							regs->r2, regs->r3);
+	printk("r8  : %016lx r9  : %016lx r10 : %016lx\n", regs->r8,
+							regs->r9, regs->r10);
+	printk("r11 : %016lx r12 : %016lx r13 : %016lx\n", regs->r11,
+							regs->r12, regs->r13);
+	printk("r14 : %016lx r15 : %016lx r16 : %016lx\n", regs->r14,
+							regs->r15, regs->r16);
+	printk("r17 : %016lx r18 : %016lx r19 : %016lx\n", regs->r17,
+							regs->r18, regs->r19);
+	printk("r20 : %016lx r21 : %016lx r22 : %016lx\n", regs->r20,
+							regs->r21, regs->r22);
+	printk("r23 : %016lx r24 : %016lx r25 : %016lx\n", regs->r23,
+							regs->r24, regs->r25);
+	printk("r26 : %016lx r27 : %016lx r28 : %016lx\n", regs->r26,
+							regs->r27, regs->r28);
+	printk("r29 : %016lx r30 : %016lx r31 : %016lx\n", regs->r29,
+							regs->r30, regs->r31);
+
+}
+
+void panic_vm(struct kvm_vcpu *v, const char *fmt, ...)
+{
+	va_list args;
+	char buf[256];
+
+	struct kvm_pt_regs *regs = vcpu_regs(v);
 	struct exit_ctl_data *p = &v->arch.exit_data;
-
+	va_start(args, fmt);
+	vsnprintf(buf, sizeof(buf), fmt, args);
+	va_end(args);
+	printk(buf);
+	kvm_show_registers(regs);
 	p->exit_reason = EXIT_REASON_VM_PANIC;
 	vmm_transition(v);
 	/*Never to return*/