From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wen Congyang Subject: Re: [PATCH v2] deal with guest paniced event Date: Wed, 07 Mar 2012 18:05:47 +0800 Message-ID: <4F5732FB.5040208@cn.fujitsu.com> References: <4F56BEF2.4020405@cn.fujitsu.com> <4F56C0E1.1090703@cn.fujitsu.com> <4F57302B.1040505@siemens.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: kvm list , qemu-devel , "linux-kernel@vger.kernel.org" , Avi Kivity , "Daniel P. Berrange" , KAMEZAWA Hiroyuki , Gleb Natapov To: Jan Kiszka Return-path: In-Reply-To: <4F57302B.1040505@siemens.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org At 03/07/2012 05:53 PM, Jan Kiszka Wrote: > On 2012-03-07 02:58, Wen Congyang wrote: >> When the host knows the guest is paniced, it will set >> exit_reason to KVM_EXIT_GUEST_PANICED. So if qemu receive >> this exit_reason, we can send a event to tell management >> application that the guest is paniced and set the guest >> status to RUN_STATE_PANICED. >> >> Signed-off-by: Wen Congyang >> --- >> kvm-all.c | 4 ++++ >> linux-headers/linux/kvm.h | 1 + >> monitor.c | 3 +++ >> monitor.h | 1 + >> qapi-schema.json | 2 +- >> qmp.c | 3 ++- >> vl.c | 1 + >> 7 files changed, 13 insertions(+), 2 deletions(-) >> >> diff --git a/kvm-all.c b/kvm-all.c >> index c4babda..d356948 100644 >> --- a/kvm-all.c >> +++ b/kvm-all.c >> @@ -1190,6 +1190,10 @@ int kvm_cpu_exec(CPUState *env) >> (uint64_t)run->hw.hardware_exit_reason); >> ret = -1; >> break; >> + case KVM_EXIT_GUEST_PANICED: >> + monitor_protocol_event(QEVENT_GUEST_PANICED, NULL); >> + vm_stop(RUN_STATE_PANICED); >> + break; > > This cannot work. You missed to set ret to -1 to break out of loop. I fotgot to do it. But it works fine while I test this patch. I think ret has set to 0 before I guest is panicked. > >> case KVM_EXIT_INTERNAL_ERROR: >> ret = kvm_handle_internal_error(env, run); >> break; >> diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h >> index f6b5343..ddc9716 100644 >> --- a/linux-headers/linux/kvm.h >> +++ b/linux-headers/linux/kvm.h >> @@ -163,6 +163,7 @@ struct kvm_pit_config { >> #define KVM_EXIT_OSI 18 >> #define KVM_EXIT_PAPR_HCALL 19 >> #define KVM_EXIT_S390_UCONTROL 20 >> +#define KVM_EXIT_GUEST_PANICED 21 > > Linux header must be sync'ed in a separate patch, referencing the > upstream (typically kvm.git) commit hash that was used as base. Make > sure to use the update-linux-headers.sh script for this. > > So the ordering is: Get the kernel changes accepted, then push the > (final) user space patches. That said, a patch like this can still be > posted in advance for informational purposes, but not for application. OK. Thanks Wen Congyang > > Jan >