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qemu: support Panic Crashloaded event handling

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Pvpanic device supports bit 1 as crashloaded event, it means that
guest actually panicked and run kexec to handle error by guest side.

Handle crashloaded as a lifecyle event in libvirt.

Test case:
Guest side:
before testing, we need make sure kdump is enabled,
1, build new pvpanic driver (with commit from upstream
   e0b9a42735f2672ca2764cfbea6e55a81098d5ba
   191941692a3d1b6a9614502b279be062926b70f5)
2, insmod new kmod
3, enable crash_kexec_post_notifiers,
  # echo 1 > /sys/module/kernel/parameters/crash_kexec_post_notifiers
4, trigger kernel panic
  # echo 1 > /proc/sys/kernel/sysrq
  # echo c > /proc/sysrq-trigger

Host side:
1, build new qemu with pvpanic patches (with commit from upstream
   600d7b47e8f5085919fd1d1157f25950ea8dbc11
   7dc58deea79a343ac3adc5cadb97215086054c86)
2, build libvirt with this patch
3, handle lifecycle event and trigger guest side panic
  # virsh event stretch --event lifecycle
  event 'lifecycle' for domain stretch: Crashed Crashloaded
  events received: 1

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
This commit is contained in:
zhenwei pi
2020-02-04 15:41:00 +08:00
committed by Daniel P. Berrangé
parent 039787c71a
commit 26badd13e8
10 changed files with 84 additions and 1 deletions
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1
include/libvirt/libvirt-domain.h
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@@ -3175,6 +3175,7 @@ typedef enum {
*/
typedef enum {
VIR_DOMAIN_EVENT_CRASHED_PANICKED = 0, /* Guest was panicked */
VIR_DOMAIN_EVENT_CRASHED_CRASHLOADED = 1, /* Guest was crashloaded */
# ifdef VIR_ENUM_SENTINELS
VIR_DOMAIN_EVENT_CRASHED_LAST