diff options
| author | zhenwei pi <pizhenwei@bytedance.com> | 2020-01-14 10:31:02 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-01-24 20:59:07 +0100 |
| commit | 7dc58deea79a343ac3adc5cadb97215086054c86 (patch) | |
| tree | 776cb4cf13cd8e08769346806385760e5857d977 /docs | |
| parent | 600d7b47e8f5085919fd1d1157f25950ea8dbc11 (diff) | |
pvpanic: implement crashloaded event handling
Handle bit 1 write, then post event to monitor.
Suggested by Paolo, declear a new event, using GUEST_PANICKED could
cause upper layers to react by shutting down or rebooting the guest.
In advance for extention, add GuestPanicInformation in event message.
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20200114023102.612548-3-pizhenwei@bytedance.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/specs/pvpanic.txt | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/docs/specs/pvpanic.txt b/docs/specs/pvpanic.txt index bdea68a430..a90fbca72b 100644 --- a/docs/specs/pvpanic.txt +++ b/docs/specs/pvpanic.txt @@ -19,9 +19,10 @@ Software should set only bits both itself and the device recognize. Bit Definition -------------- -bit 0: setting it indicates a guest panic has happened. -bit 1: named crashloaded. setting it indicates a guest panic and run - kexec to handle error by guest itself. +bit 0: a guest panic has happened and should be processed by the host +bit 1: a guest panic has happened and will be handled by the guest; + the host should record it or report it, but should not affect + the execution of the guest. ACPI Interface -------------- @@ -30,13 +31,12 @@ pvpanic device is defined with ACPI ID "QEMU0001". Custom methods: RDPT: To determine whether guest panic notification is supported. Arguments: None -Return: Returns a byte, bit 0 set to indicate guest panic - notification is supported. Other bits are reserved and - should be ignored. +Return: Returns a byte, with the same semantics as the I/O port + interface. WRPT: To send a guest panic event -Arguments: Arg0 is a byte, with bit 0 set to indicate guest panic has - happened. Other bits are reserved and should be cleared. +Arguments: Arg0 is a byte to be written, with the same semantics as + the I/O interface. Return: None The ACPI device will automatically refer to the right port in case it |