From 7dc58deea79a343ac3adc5cadb97215086054c86 Mon Sep 17 00:00:00 2001 From: zhenwei pi Date: Tue, 14 Jan 2020 10:31:02 +0800 Subject: 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 Message-Id: <20200114023102.612548-3-pizhenwei@bytedance.com> Signed-off-by: Paolo Bonzini --- docs/specs/pvpanic.txt | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) (limited to 'docs') 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 -- cgit v1.1