From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1162336AbbKTSwT (ORCPT ); Fri, 20 Nov 2015 13:52:19 -0500 Received: from mail.skyhub.de ([78.46.96.112]:36870 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161213AbbKTSwQ (ORCPT ); Fri, 20 Nov 2015 13:52:16 -0500 From: Borislav Petkov To: KVM Cc: Paolo Bonzini , LKML Subject: [PATCH] kvm: Dump guest rIP when the guest tried something unsupported Date: Fri, 20 Nov 2015 19:52:12 +0100 Message-Id: <1448045532-12281-1-git-send-email-bp@alien8.de> X-Mailer: git-send-email 2.3.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Borislav Petkov 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 --- 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