From mboxrd@z Thu Jan 1 00:00:00 1970 From: Prarit Bhargava Subject: [PATCH] x86, add hypervisor name to dump_stack() Date: Wed, 10 Oct 2012 10:27:48 -0400 Message-ID: <1349879268-3573-1-git-send-email-prarit@redhat.com> Cc: Prarit Bhargava , Avi Kivity , Gleb Natapov , Alex Williamson , Marcelo Tostatti , Ingo Molnar , kvm@vger.kernel.org, x86@kernel.org To: linux-kernel@vger.kernel.org Return-path: Received: from mx1.redhat.com ([209.132.183.28]:32967 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756464Ab2JJO1x (ORCPT ); Wed, 10 Oct 2012 10:27:53 -0400 Sender: kvm-owner@vger.kernel.org List-ID: Debugging crash, panics, stack trace WARN_ONs, etc., from both virtual and bare-metal boots can get difficult very quickly. While there are ways to decipher the output and determine if the output is from a virtual guest, the in-kernel hypervisors now have a single registration point and set x86_hyper. We can use this to output a single extra line on virtual machines that indicates the hypervisor type. Signed-off-by: Prarit Bhargava Cc: Avi Kivity Cc: Gleb Natapov Cc: Alex Williamson Cc: Marcelo Tostatti Cc: Ingo Molnar Cc: kvm@vger.kernel.org Cc: x86@kernel.org --- arch/x86/kernel/dumpstack.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c index ae42418b..75a635e 100644 --- a/arch/x86/kernel/dumpstack.c +++ b/arch/x86/kernel/dumpstack.c @@ -17,6 +17,7 @@ #include #include +#include int panic_on_unrecovered_nmi; @@ -193,6 +194,8 @@ void dump_stack(void) init_utsname()->release, (int)strcspn(init_utsname()->version, " "), init_utsname()->version); + if (x86_hyper && x86_hyper->name) + printk("Hypervisor: %s\n", x86_hyper->name); show_trace(NULL, NULL, &stack, bp); } EXPORT_SYMBOL(dump_stack); -- 1.7.9.3