aboutsummaryrefslogtreecommitdiff
path: root/docs/specs
diff options
context:
space:
mode:
authorzhenwei pi <pizhenwei@bytedance.com>2020-01-14 10:31:02 +0800
committerPaolo Bonzini <pbonzini@redhat.com>2020-01-24 20:59:07 +0100
commit7dc58deea79a343ac3adc5cadb97215086054c86 (patch)
tree776cb4cf13cd8e08769346806385760e5857d977 /docs/specs
parent600d7b47e8f5085919fd1d1157f25950ea8dbc11 (diff)
downloadqemu-7dc58deea79a343ac3adc5cadb97215086054c86.zip
qemu-7dc58deea79a343ac3adc5cadb97215086054c86.tar.gz
qemu-7dc58deea79a343ac3adc5cadb97215086054c86.tar.bz2
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/specs')
-rw-r--r--docs/specs/pvpanic.txt16
1 files changed, 8 insertions, 8 deletions
diff --git a/docs/specs/pvpanic.txt b/docs/specs/pvpanic.txt
index bdea68a..a90fbca 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