From: Borislav Petkov <bp@alien8.de>
To: KVM <kvm@vger.kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>, LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH] kvm: Dump guest rIP when the guest tried something unsupported
Date: Fri, 20 Nov 2015 19:52:12 +0100 [thread overview]
Message-ID: <1448045532-12281-1-git-send-email-bp@alien8.de> (raw)
From: Borislav Petkov <bp@suse.de>
It looks like this in action:
kvm [5197]: vcpu0, guest rIP: 0xffffffff810187ba unhandled rdmsr: 0xc001102
and helps to pinpoint quickly where in the guest we did the unsupported
thing.
Signed-off-by: Borislav Petkov <bp@suse.de>
---
include/linux/kvm_host.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 5706a2108f0a..597f6607c440 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -439,7 +439,8 @@ struct kvm {
/* The guest did something we don't support. */
#define vcpu_unimpl(vcpu, fmt, ...) \
- kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
+ kvm_pr_unimpl("vcpu%i, guest rIP: 0x%lx " fmt, \
+ (vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)
#define vcpu_debug(vcpu, fmt, ...) \
kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
--
2.3.5
next reply other threads:[~2015-11-20 18:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-20 18:52 Borislav Petkov [this message]
2015-12-04 14:42 ` [PATCH] kvm: Dump guest rIP when the guest tried something unsupported Paolo Bonzini
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