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authorAvi Kivity <avi@qumranet.com>2007-09-12 13:21:09 +0300
committerAvi Kivity <avi@qumranet.com>2007-10-13 10:18:28 +0200
commit054b1369679fb97582fc77f25a700d4290ff3e89 (patch)
treefc06afd41830c263f6c068d1bd743ef7fcf9637d /drivers
parentfd2a76086527cbe074b08a8820253228cd919ece (diff)
KVM: Improve emulation failure reporting
Report failed opcodes from all locations. Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/kvm/kvm.h1
-rw-r--r--drivers/kvm/kvm_main.c16
-rw-r--r--drivers/kvm/svm.c2
-rw-r--r--drivers/kvm/vmx.c2
4 files changed, 11 insertions, 10 deletions
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index d93ab48424c..ad0813843ad 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -558,6 +558,7 @@ enum emulation_result {
int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
unsigned long cr2, u16 error_code);
+void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index e17b433152c..3b046507ebc 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -1240,25 +1240,25 @@ int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
return X86EMUL_CONTINUE;
}
-static void report_emulation_failure(struct x86_emulate_ctxt *ctxt)
+void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
{
static int reported;
u8 opcodes[4];
- unsigned long rip = ctxt->vcpu->rip;
+ unsigned long rip = vcpu->rip;
unsigned long rip_linear;
- rip_linear = rip + get_segment_base(ctxt->vcpu, VCPU_SREG_CS);
+ rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
if (reported)
return;
- emulator_read_std(rip_linear, (void *)opcodes, 4, ctxt->vcpu);
+ emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
- printk(KERN_ERR "emulation failed but !mmio_needed?"
- " rip %lx %02x %02x %02x %02x\n",
- rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
+ printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
+ context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
reported = 1;
}
+EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
struct x86_emulate_ops emulate_ops = {
.read_std = emulator_read_std,
@@ -1323,7 +1323,7 @@ int emulate_instruction(struct kvm_vcpu *vcpu,
if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
return EMULATE_DONE;
if (!vcpu->mmio_needed) {
- report_emulation_failure(&emulate_ctxt);
+ kvm_report_emulation_failure(vcpu, "mmio");
return EMULATE_FAIL;
}
return EMULATE_DO_MMIO;
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 95681ea1638..729f1cd9360 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -960,7 +960,7 @@ static int pf_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
++svm->vcpu.stat.mmio_exits;
return 0;
case EMULATE_FAIL:
- vcpu_printf(&svm->vcpu, "%s: emulate fail\n", __FUNCTION__);
+ kvm_report_emulation_failure(&svm->vcpu, "pagetable");
break;
default:
BUG();
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index c44c9ac79ca..4f115a8e45e 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -1798,7 +1798,7 @@ static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
++vcpu->stat.mmio_exits;
return 0;
case EMULATE_FAIL:
- vcpu_printf(vcpu, "%s: emulate fail\n", __FUNCTION__);
+ kvm_report_emulation_failure(vcpu, "pagetable");
break;
default:
BUG();