linux-kernel - Re: [PATCH]qemu: deal with guest paniced event

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Date:	Mon, 27 Feb 2012 09:59:07 +0100
From:	Jan Kiszka <jan.kiszka@....de>
To:	Wen Congyang <wency@...fujitsu.com>
CC:	kvm list <kvm@...r.kernel.org>, Avi Kivity <avi@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	"Daniel P. Berrange" <berrange@...hat.com>,
	linux-kernel@...r.kernel.org, qemu-devel <qemu-devel@...gnu.org>
Subject: Re: [PATCH]qemu: deal with guest paniced event

On 2012-02-27 04:05, Wen Congyang wrote:
> When the host knows the guest is paniced, it will set
> exit_reason to KVM_EXIT_GUEST_PANIC. So if qemu receive
> this exit_reason, we can send a event to tell management
> application that the guest is paniced.
> 
> Signed-off-by: Wen Congyang <wency@...fujitsu.com>
> ---
>  kvm-all.c                 |    3 +++
>  linux-headers/linux/kvm.h |    1 +
>  monitor.c                 |    3 +++
>  monitor.h                 |    1 +
>  4 files changed, 8 insertions(+), 0 deletions(-)
> 
> diff --git a/kvm-all.c b/kvm-all.c
> index c4babda..ae428ab 100644
> --- a/kvm-all.c
> +++ b/kvm-all.c
> @@ -1190,6 +1190,9 @@ int kvm_cpu_exec(CPUState *env)
>                      (uint64_t)run->hw.hardware_exit_reason);
>              ret = -1;
>              break;
> +        case KVM_EXIT_GUEST_PANIC:
> +            monitor_protocol_event(QEVENT_GUEST_PANICED, NULL);
> +            break;
>          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..45dd031 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_PANIC	  21
>  
>  /* For KVM_EXIT_INTERNAL_ERROR */
>  #define KVM_INTERNAL_ERROR_EMULATION 1

linux-headers are supposed to be synchronized in a separate patch,
naming the upstream or kvm.git hash they pull in. IOW: the KVM ABI
change has to be applied first.

Jan


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