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| author | Mihai Carabas <mihai.carabas@oracle.com> | 2021-01-27 16:59:29 +0200 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2021-01-29 10:47:28 +0000 |
| commit | cb2cc20692b8770a63ef139ad0ce14052c25cddd (patch) | |
| tree | 187cfb0dfdb600f6071b9ddb423834e081d8e3dc /docs/specs | |
| parent | d097b3dcb6214a35613abc60c48517b850349ad0 (diff) | |
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>
Diffstat (limited to 'docs/specs')
| -rw-r--r-- | docs/specs/pvpanic.txt | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/docs/specs/pvpanic.txt b/docs/specs/pvpanic.txt index a90fbca72b..8afcde11cc 100644 --- a/docs/specs/pvpanic.txt +++ b/docs/specs/pvpanic.txt @@ -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 -------------- |