[PATCH] pvpanic: Advertise the PVPANIC_CRASHLOADED event support

[Paolo Bonzini <pbonzini@redhat.com>]

Advertise both types of events as supported when the guest OS
queries the pvpanic device.  Currently only PVPANIC_PANICKED is
exposed; PVPANIC_CRASHLOADED must also be advertised, but only on
new machine types.

Fixes: 7dc58deea79a ("pvpanic: implement crashloaded event handling")
Reported-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/core/machine.c | 1 +
 hw/misc/pvpanic.c | 5 ++++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/hw/core/machine.c b/hw/core/machine.c
index 98b87f76cb..d0408049b5 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -35,6 +35,7 @@ GlobalProperty hw_compat_5_1[] = {
     { "virtio-blk-device", "num-queues", "1"},
     { "virtio-scsi-device", "num_queues", "1"},
     { "nvme", "use-intel-id", "on"},
+    { "pvpanic", "events", "1"}, /* PVPANIC_PANICKED */
 };
 const size_t hw_compat_5_1_len = G_N_ELEMENTS(hw_compat_5_1);
 
diff --git a/hw/misc/pvpanic.c b/hw/misc/pvpanic.c
index 598d5471a4..35d6797831 100644
--- a/hw/misc/pvpanic.c
+++ b/hw/misc/pvpanic.c
@@ -61,12 +61,14 @@ struct PVPanicState {
 
     MemoryRegion io;
     uint16_t ioport;
+    uint8_t events;
 };
 
 /* return supported events on read */
 static uint64_t pvpanic_ioport_read(void *opaque, hwaddr addr, unsigned size)
 {
-    return PVPANIC_PANICKED;
+    PVPanicState *pvp = opaque;
+    return pvp->events;
 }
 
 static void pvpanic_ioport_write(void *opaque, hwaddr addr, uint64_t val,
@@ -112,6 +114,7 @@ static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp)
 
 static Property pvpanic_isa_properties[] = {
     DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicState, ioport, 0x505),
+    DEFINE_PROP_UINT8("events", PVPanicState, events, PVPANIC_PANICKED | PVPANIC_CRASHLOADED),
     DEFINE_PROP_END_OF_LIST(),
 };
 
-- 
2.26.2