Patchwork [6/7,v6] deal with guest panicked event accoring to -onpanic parameter

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Submitter Wen Congyang
Date July 6, 2012, 9:41 a.m.
Message ID <4FF6B2C9.10302@cn.fujitsu.com>
Download mbox | patch
Permalink /patch/169400/
State New
Headers show

Comments

Wen Congyang - July 6, 2012, 9:41 a.m.
The onpanic parameter can have the following value:
1. none
2. pause
3. poweroff
4. reset

The action for each value when the guest is panicked:
1. none: emit QEVENT_GUEST_PANICKED only
2. pause: emit QEVENT_GUEST_PANICKED and pause the guest
3. poweroff: emit QEVENT_GUEST_PANICKED and poweroff the guest
4. reset: emit QEVENT_GUEST_PANICKED and reset the guest

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
---
 hw/kvm/pv_event.c |   17 +++++++++++++++++
 qemu-options.hx   |   15 +++++++++++++++
 vl.c              |    6 ++++++
 3 files changed, 38 insertions(+), 0 deletions(-)
Jan Kiszka - July 6, 2012, 11:12 a.m.
On 2012-07-06 11:41, Wen Congyang wrote:
> The onpanic parameter can have the following value:
> 1. none
> 2. pause
> 3. poweroff
> 4. reset
> 
> The action for each value when the guest is panicked:
> 1. none: emit QEVENT_GUEST_PANICKED only
> 2. pause: emit QEVENT_GUEST_PANICKED and pause the guest
> 3. poweroff: emit QEVENT_GUEST_PANICKED and poweroff the guest
> 4. reset: emit QEVENT_GUEST_PANICKED and reset the guest

This is redundant to patch 7 and the preferred device property approach.

Jan

> 
> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
> ---
>  hw/kvm/pv_event.c |   17 +++++++++++++++++
>  qemu-options.hx   |   15 +++++++++++++++
>  vl.c              |    6 ++++++
>  3 files changed, 38 insertions(+), 0 deletions(-)
> 
> diff --git a/hw/kvm/pv_event.c b/hw/kvm/pv_event.c
> index d7ded37..890abcd 100644
> --- a/hw/kvm/pv_event.c
> +++ b/hw/kvm/pv_event.c
> @@ -59,6 +59,23 @@ static void panicked_perform_action(uint32_t panicked_action)
>      }
>  }
>  
> +int select_panicked_action(const char *p)
> +{
> +    if (strcasecmp(p, "none") == 0) {
> +        panicked_action = PANICKED_REPORT;
> +    } else if (strcasecmp(p, "pause") == 0) {
> +        panicked_action = PANICKED_PAUSE;
> +    } else if (strcasecmp(p, "poweroff") == 0) {
> +        panicked_action = PANICKED_POWEROFF;
> +    } else if (strcasecmp(p, "reset") == 0) {
> +        panicked_action = PANICKED_RESET;
> +    } else {
> +        return -1;
> +    }
> +
> +    return 0;
> +}
> +
>  #if defined(KVM_PV_PORT)
>  #include "pv_ioport.c"
>  
> diff --git a/qemu-options.hx b/qemu-options.hx
> index 8b66264..4a061bf 100644
> --- a/qemu-options.hx
> +++ b/qemu-options.hx
> @@ -2743,6 +2743,21 @@ DEF("qtest-log", HAS_ARG, QEMU_OPTION_qtest_log,
>      "-qtest-log LOG  specify tracing options\n",
>      QEMU_ARCH_ALL)
>  
> +DEF("onpanic", HAS_ARG, QEMU_OPTION_onpanic, \
> +    "-onpanic none|pause|poweroff|reset\n" \
> +    "                action when the guest is panicked [default=none]",
> +    QEMU_ARCH_ALL)
> +STEXI
> +@item -onpanic @var{action}
> +
> +The @var{action} controls what QEmu will do when the guest is panicked.
> +The default is @code{none} (emit QEVENT_GUEST_PANICKED only).
> +Other possible actions are:
> +@code{pause} (emit QEVENT_GUEST_PANICKED and pause the guest),
> +@code{poweroff} (emit QEVENT_GUEST_PANICKED and forcefully poweroff the guest),
> +@code{reset} (emit QEVENT_GUEST_PANICKED and forcefully reset the guest).
> +ETEXI
> +
>  HXCOMM This is the last statement. Insert new options before this line!
>  STEXI
>  @end table
> diff --git a/vl.c b/vl.c
> index f5cd28d..1a68257 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -3205,6 +3205,12 @@ int main(int argc, char **argv, char **envp)
>              case QEMU_OPTION_qtest_log:
>                  qtest_log = optarg;
>                  break;
> +            case QEMU_OPTION_onpanic:
> +                if (select_panicked_action(optarg) == -1) {
> +                    fprintf(stderr, "Unknown -onpanic parameter\n");
> +                    exit(1);
> +                }
> +                break;
>              default:
>                  os_parse_cmd_args(popt->index, optarg);
>              }
>

Patch

diff --git a/hw/kvm/pv_event.c b/hw/kvm/pv_event.c
index d7ded37..890abcd 100644
--- a/hw/kvm/pv_event.c
+++ b/hw/kvm/pv_event.c
@@ -59,6 +59,23 @@  static void panicked_perform_action(uint32_t panicked_action)
     }
 }
 
+int select_panicked_action(const char *p)
+{
+    if (strcasecmp(p, "none") == 0) {
+        panicked_action = PANICKED_REPORT;
+    } else if (strcasecmp(p, "pause") == 0) {
+        panicked_action = PANICKED_PAUSE;
+    } else if (strcasecmp(p, "poweroff") == 0) {
+        panicked_action = PANICKED_POWEROFF;
+    } else if (strcasecmp(p, "reset") == 0) {
+        panicked_action = PANICKED_RESET;
+    } else {
+        return -1;
+    }
+
+    return 0;
+}
+
 #if defined(KVM_PV_PORT)
 #include "pv_ioport.c"
 
diff --git a/qemu-options.hx b/qemu-options.hx
index 8b66264..4a061bf 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -2743,6 +2743,21 @@  DEF("qtest-log", HAS_ARG, QEMU_OPTION_qtest_log,
     "-qtest-log LOG  specify tracing options\n",
     QEMU_ARCH_ALL)
 
+DEF("onpanic", HAS_ARG, QEMU_OPTION_onpanic, \
+    "-onpanic none|pause|poweroff|reset\n" \
+    "                action when the guest is panicked [default=none]",
+    QEMU_ARCH_ALL)
+STEXI
+@item -onpanic @var{action}
+
+The @var{action} controls what QEmu will do when the guest is panicked.
+The default is @code{none} (emit QEVENT_GUEST_PANICKED only).
+Other possible actions are:
+@code{pause} (emit QEVENT_GUEST_PANICKED and pause the guest),
+@code{poweroff} (emit QEVENT_GUEST_PANICKED and forcefully poweroff the guest),
+@code{reset} (emit QEVENT_GUEST_PANICKED and forcefully reset the guest).
+ETEXI
+
 HXCOMM This is the last statement. Insert new options before this line!
 STEXI
 @end table
diff --git a/vl.c b/vl.c
index f5cd28d..1a68257 100644
--- a/vl.c
+++ b/vl.c
@@ -3205,6 +3205,12 @@  int main(int argc, char **argv, char **envp)
             case QEMU_OPTION_qtest_log:
                 qtest_log = optarg;
                 break;
+            case QEMU_OPTION_onpanic:
+                if (select_panicked_action(optarg) == -1) {
+                    fprintf(stderr, "Unknown -onpanic parameter\n");
+                    exit(1);
+                }
+                break;
             default:
                 os_parse_cmd_args(popt->index, optarg);
             }