kvmtool: Handle exit reason KVM_EXIT_SYSTEM_EVENT

The KVM_EXIT_SYSTEM_EVENT exit reason was added to define
architecture independent system-wide events for a Guest.

Currently, it is used by in-kernel PSCI-0.2 emulation of
KVM ARM/ARM64 to inform user space about PSCI SYSTEM_OFF
or PSCI SYSTEM_RESET request.

For now, we simply treat all system-wide guest events as
shutdown request in KVMTOOL.

Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: Anup Patel <anup.patel@linaro.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
[will: removed useless prints]
Signed-off-by: Will Deacon <will.deacon@arm.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/kvm-cpu.c b/kvm-cpu.c
index ee0a8ec5..5d906640 100644
--- a/kvm-cpu.c
+++ b/kvm-cpu.c
@@ -160,6 +160,22 @@ int kvm_cpu__start(struct kvm_cpu *cpu)
 			goto exit_kvm;
 		case KVM_EXIT_SHUTDOWN:
 			goto exit_kvm;
+		case KVM_EXIT_SYSTEM_EVENT:
+			/*
+			 * Print the type of system event and
+			 * treat all system events as shutdown request.
+			 */
+			switch (cpu->kvm_run->system_event.type) {
+			case KVM_SYSTEM_EVENT_RESET:
+				/* Fall through for now */
+			case KVM_SYSTEM_EVENT_SHUTDOWN:
+				goto exit_kvm;
+			default:
+				pr_warning("unknown system event type %d",
+					   cpu->kvm_run->system_event.type);
+				goto exit_kvm;
+			};
+			break;
 		default: {
 			bool ret;