diff options
| author | Avi Kivity <avi@qumranet.com> | 2007-09-12 13:21:09 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-10-13 10:18:28 +0200 |
| commit | 054b1369679fb97582fc77f25a700d4290ff3e89 (patch) | |
| tree | fc06afd41830c263f6c068d1bd743ef7fcf9637d /drivers/kvm | |
| parent | fd2a76086527cbe074b08a8820253228cd919ece (diff) | |
| download | op-kernel-dev-054b1369679fb97582fc77f25a700d4290ff3e89.zip op-kernel-dev-054b1369679fb97582fc77f25a700d4290ff3e89.tar.gz | |
KVM: Improve emulation failure reporting
Report failed opcodes from all locations.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm')
| -rw-r--r-- | drivers/kvm/kvm.h | 1 | ||||
| -rw-r--r-- | drivers/kvm/kvm_main.c | 16 | ||||
| -rw-r--r-- | drivers/kvm/svm.c | 2 | ||||
| -rw-r--r-- | drivers/kvm/vmx.c | 2 |
4 files changed, 11 insertions, 10 deletions
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index d93ab48..ad08138 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 e17b433..3b04650 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 95681ea1..729f1cd 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 c44c9ac..4f115a8 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(); |
