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@bytedance.com> Message-Id: <20200114023102.612548-2-pizhenwei@bytedance.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -16,8 +16,12 @@ pvpanic exposes a single I/O port, by default 0x505. On read, the bits
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recognized by the device are set. Software should ignore bits it doesn't
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recognized by the device are set. Software should ignore bits it doesn't
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recognize. On write, the bits not recognized by the device are ignored.
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recognize. On write, the bits not recognized by the device are ignored.
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Software should set only bits both itself and the device recognize.
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Software should set only bits both itself and the device recognize.
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Currently, only bit 0 is recognized, setting it indicates a guest panic
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has happened.
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Bit Definition
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bit 0: setting it indicates a guest panic has happened.
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bit 1: named crashloaded. setting it indicates a guest panic and run
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kexec to handle error by guest itself.
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ACPI Interface
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ACPI Interface
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