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[5/6] pvpanic : update pvpanic document

Message ID 1603891979-11961-6-git-send-email-mihai.carabas@oracle.com
State New
Headers show
Series [1/6] hw/misc/pvpanic: Build the pvpanic device for any machine | expand

Commit Message

Mihai Carabas Oct. 28, 2020, 1:32 p.m. UTC
From: Peng Hao <peng.hao2@zte.com.cn>

Add mmio mode as a pci device support info in docs/specs/pvpanic.txt.

Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com>
 docs/specs/pvpanic.txt | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)
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diff --git a/docs/specs/pvpanic.txt b/docs/specs/pvpanic.txt
index a90fbca..4258922 100644
--- a/docs/specs/pvpanic.txt
+++ b/docs/specs/pvpanic.txt
@@ -1,7 +1,7 @@ 
-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, since qemu 4.0, as a PCI device.
 ISA Interface
@@ -24,6 +27,13 @@  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. For example, the arm virt machine may
+enable a pvpanic device by adding '-device pvpanic-pci' to the command line.
 ACPI Interface