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[Qemu-arm] [PATCH V10 9/9] pvpanic : update pvpanic document
From: |
Peng Hao |
Subject: |
[Qemu-arm] [PATCH V10 9/9] pvpanic : update pvpanic document |
Date: |
Wed, 28 Nov 2018 20:12:52 +0800 |
Add mmio support info in docs/specs/pvpanic.txt.
Signed-off-by: Peng Hao <address@hidden>
---
docs/specs/pvpanic.txt | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/docs/specs/pvpanic.txt b/docs/specs/pvpanic.txt
index c7bbacc..b1beea3 100644
--- a/docs/specs/pvpanic.txt
+++ b/docs/specs/pvpanic.txt
@@ -1,14 +1,17 @@
PVPANIC DEVICE
==============
-pvpanic device is a simulated ISA device, through which a guest panic
-event is sent to qemu, and a QMP event is generated. This allows
+pvpanic device is a simulated ISA/SYSBUS 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.
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 SYSBUS device (using MMIO).
+
ISA Interface
-------------
@@ -19,6 +22,13 @@ Software should set only bits both itself and the device
recognize.
Currently, only bit 0 is recognized, setting it indicates a guest panic
has happened.
+SYSBUS Interface
+----------------
+
+The SYSBUS interface is similar to the ISA interface except that it uses
+MMIO. For example, the arm virt machine could put the pvpanic device at
+[0x9070000, 0x9070001] and currently only the first byte is used.
+
ACPI Interface
--------------
--
1.8.3.1
- [Qemu-arm] [PATCH V10 4/9] hw/arm/virt: Use the pvpanic device, (continued)
- [Qemu-arm] [PATCH V10 4/9] hw/arm/virt: Use the pvpanic device, Peng Hao, 2018/11/27
- [Qemu-arm] [PATCH V10 2/9] hw/misc/pvpanic: Cosmetic renaming, Peng Hao, 2018/11/27
- [Qemu-arm] [PATCH V10 3/9] hw/misc/pvpanic: Add the MMIO interface, Peng Hao, 2018/11/27
- [Qemu-arm] [PATCH V10 5/9] hw/arm/virt: add pvpanic device in virt acpi table, Peng Hao, 2018/11/27
- [Qemu-arm] [PATCH V10 6/9] hw/misc/pvpanic: add configure query interface, Peng Hao, 2018/11/27
- [Qemu-arm] [PATCH V10 9/9] pvpanic : update pvpanic document,
Peng Hao <=
- [Qemu-arm] [PATCH V10 7/9] hw/misc/pvpanic: preparing for adding configure interface, Peng Hao, 2018/11/27
[Qemu-arm] [PATCH V10 8/9] hw/misc/pvpanic: realize the configure interface, Peng Hao, 2018/11/27