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>

diff --git a/arch/ia64/kvm/mmio.c b/arch/ia64/kvm/mmio.c
index 7f1a858bc69f64c0156748e1d07c14f42066d208..21f63fffc379ad8a7faf227e1867789ec13c502d 100644 (file)
--- 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);

diff --git a/arch/ia64/kvm/process.c b/arch/ia64/kvm/process.c
index 800817307b7b9da774cb678373476537b2c1e28e..cefc349ce35440a78ea77f481829c23a88f5ac56 100644 (file)
--- 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 */
 }
 

diff --git a/arch/ia64/kvm/vcpu.c b/arch/ia64/kvm/vcpu.c
index a528d70a820cbaa8e6fec5913912f6950cfb226f..ecd526b5532305002b008b8936d3d7d7d6c9f54d 100644 (file)
--- 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*/

diff --git a/arch/ia64/kvm/vcpu.h b/arch/ia64/kvm/vcpu.h
index e9b2a4e121c052636745927e40964417c5955812..0dad8421791c976feb52fadf5fcdb96d6e940910 100644 (file)
--- a/arch/ia64/kvm/vcpu.h
+++ b/arch/ia64/kvm/vcpu.h
@@ -737,7 +737,7 @@ void kvm_init_vtlb(struct kvm_vcpu *v);
 void kvm_init_vhpt(struct kvm_vcpu *v);
 void thash_init(struct thash_cb *hcb, u64 sz);
 
-void panic_vm(struct kvm_vcpu *v);
+void panic_vm(struct kvm_vcpu *v, const char *fmt, ...);
 
 extern u64 ia64_call_vsa(u64 proc, u64 arg1, u64 arg2, u64 arg3,
                u64 arg4, u64 arg5, u64 arg6, u64 arg7);

diff --git a/arch/ia64/kvm/vmm.c b/arch/ia64/kvm/vmm.c
index 957779593c2f7f5fd9fd9a833532ad70a9712897..d3dc0b040ce461cc3d505cf1799c5a3de324cf33 100644 (file)
--- a/arch/ia64/kvm/vmm.c
+++ b/arch/ia64/kvm/vmm.c
@@ -20,6 +20,7 @@
  */
 
 
+#include<linux/kernel.h>
 #include<linux/module.h>
 #include<asm/fpswa.h>