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pvpanic : update pvpanic spec document

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Add pvpanic PCI device support details in docs/specs/pvpanic.txt.

Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Mihai Carabas 2021-01-27 16:59:29 +02:00 committed by Peter Maydell
parent d097b3dcb6
commit cb2cc20692
1 changed files with 12 additions and 1 deletions
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13
docs/specs/pvpanic.txt
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@ -1,7 +1,7 @@
PVPANIC DEVICE
==============
pvpanic device is a simulated ISA device, through which a guest panic
pvpanic device is a simulated device, through which a guest panic
event is sent to qemu, and a QMP event is generated. This allows
management apps (e.g. libvirt) to be notified and respond to the event.
@ -9,6 +9,9 @@ The management app has the option of waiting for GUEST_PANICKED events,
and/or polling for guest-panicked RunState, to learn when the pvpanic
device has fired a panic event.
The pvpanic device can be implemented as an ISA device (using IOPORT) or as a
PCI device.
ISA Interface
-------------
@ -24,6 +27,14 @@ 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.
PCI Interface
-------------
The PCI interface is similar to the ISA interface except that it uses an MMIO
address space provided by its BAR0, 1 byte long. Any machine with a PCI bus
can enable a pvpanic device by adding '-device pvpanic-pci' to the command
line.
ACPI Interface
--------------