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kvm/x86: add sending hyper-v crash notification to user space

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Sending of notification is done by exiting vcpu to user space
if KVM_REQ_HV_CRASH is enabled for vcpu. At exit to user space
the kvm_run structure contains system_event with type
KVM_SYSTEM_EVENT_CRASH to notify about guest crash occurred.

Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Peter Hornyack <peterhornyack@google.com>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Gleb Natapov <gleb@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Andrey Smetanin
2015-07-03 15:01:41 +03:00
committed by Paolo Bonzini
parent e7d9513b60
commit 2ce7918990
4 changed files with 13 additions and 0 deletions
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5
Documentation/virtual/kvm/api.txt
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@@ -3277,6 +3277,7 @@ should put the acknowledged interrupt vector into the 'epr' field.
struct {
#define KVM_SYSTEM_EVENT_SHUTDOWN 1
#define KVM_SYSTEM_EVENT_RESET 2
#define KVM_SYSTEM_EVENT_CRASH 3
__u32 type;
__u64 flags;
} system_event;
@@ -3296,6 +3297,10 @@ Valid values for 'type' are:
KVM_SYSTEM_EVENT_RESET -- the guest has requested a reset of the VM.
As with SHUTDOWN, userspace can choose to ignore the request, or
to schedule the reset to occur in the future and may call KVM_RUN again.
KVM_SYSTEM_EVENT_CRASH -- the guest crash occurred and the guest
has requested a crash condition maintenance. Userspace can choose
to ignore the request, or to gather VM memory core dump and/or
reset/shutdown of the VM.
/* Fix the size of the union. */
char padding[256];