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pvpanic : update pvpanic spec document 

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>
master
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
============== ==============
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 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. 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 and/or polling for guest-panicked RunState, to learn when the pvpanic
device has fired a panic event. 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 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 host should record it or report it, but should not affect
the execution of the guest. 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 ACPI Interface
-------------- --------------