Re: [PATCH 1/2] pvpanic: introduce crashloaded for pvpanic

Add bit 1 for pvpanic. This bit means that guest hits a panic, but guest wants to handle error by itself. Typical case: Linux guest runs kdump in panic. It will help us to separate the abnormal reboot from normal operation. Signed-off-by: zhenwei pi <pizhenwei(a)bytedance.com&gt; --- docs/specs/pvpanic.txt | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/docs/specs/pvpanic.txt b/docs/specs/pvpanic.txt index c7bbacc778..bdea68a430 100644 --- a/docs/specs/pvpanic.txt +++ b/docs/specs/pvpanic.txt @@ -16,8 +16,12 @@ pvpanic exposes a single I/O port, by default 0x505. On read, the bits recognized by the device are set. Software should ignore bits it doesn't recognize. On write, the bits not recognized by the device are ignored. Software should set only bits both itself and the device recognize.

-Currently, only bit 0 is recognized, setting it indicates a guest panic -has happened. + +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.

ACPI Interface --------------