[Qemu-devel] [PULL 06/24] kvm: Add kvm system event crash handler

[Paolo Bonzini <pbonzini@redhat.com>]

From: Andrey Smetanin <asmetanin@virtuozzo.com>

KVM kernel can send guest crash events into userspace.
Appropriate guest crash handler is called when kernel guest
crash event received. Guest crash event recognized by a
KVM_SYSTEM_EVENT_CRASH type of system event.

Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Andreas Färber <afaerber@suse.de>
Message-Id: <1435924905-8926-11-git-send-email-den@openvz.org>
[Rebase: add lock/unlock iothread around qemu_system_guest_panicked - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 kvm-all.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kvm-all.c b/kvm-all.c
index c6f5128..de1924c 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1889,6 +1889,12 @@ int kvm_cpu_exec(CPUState *cpu)
                 qemu_system_reset_request();
                 ret = EXCP_INTERRUPT;
                 break;
+            case KVM_SYSTEM_EVENT_CRASH:
+                qemu_mutex_lock_iothread();
+                qemu_system_guest_panicked();
+                qemu_mutex_unlock_iothread();
+                ret = 0;
+                break;
             default:
                 DPRINTF("kvm_arch_handle_exit\n");
                 ret = kvm_arch_handle_exit(cpu, run);
-- 
2.5.0