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authorPeng Hao <peng.hao2@zte.com.cn>2018-11-06 17:57:15 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-11-07 15:53:04 +0300
commitb1d9d6cb30fe6bd1b844ae98a372471f17c4fdc4 (patch)
treef2b2406de5e0ef83a6e0070d598e0ce01ec64d02 /Documentation/devicetree/bindings/misc
parent725eba2928ada8d0fe6bafb984e37576851edc91 (diff)
downloadlinux-b1d9d6cb30fe6bd1b844ae98a372471f17c4fdc4.tar.xz
dt-bindings: misc/pvpanic: add document for pvpanic-mmio
Add dt-bindings document for "qemu:pvpanic-mmio". Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Peng Hao <peng.hao2@zte.com.cn> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/devicetree/bindings/misc')
-rw-r--r--Documentation/devicetree/bindings/misc/pvpanic-mmio.txt29
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diff --git a/Documentation/devicetree/bindings/misc/pvpanic-mmio.txt b/Documentation/devicetree/bindings/misc/pvpanic-mmio.txt
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+++ b/Documentation/devicetree/bindings/misc/pvpanic-mmio.txt
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+* QEMU PVPANIC MMIO Configuration bindings
+
+QEMU's emulation / virtualization targets provide the following PVPANIC
+MMIO Configuration interface on the "virt" machine.
+type:
+
+- a read-write, 16-bit wide data register.
+
+QEMU exposes the data register to guests as memory mapped registers.
+
+Required properties:
+
+- compatible: "qemu,pvpanic-mmio".
+- reg: the MMIO region used by the device.
+ * Bytes 0x0 Write panic event to the reg when guest OS panics.
+ * Bytes 0x1 Reserved.
+
+Example:
+
+/ {
+ #size-cells = <0x2>;
+ #address-cells = <0x2>;
+
+ pvpanic-mmio@9060000 {
+ compatible = "qemu,pvpanic-mmio";
+ reg = <0x0 0x9060000 0x0 0x2>;
+ };
+};
+