Documentation/devicetree/bindings/misc/pvpanic-mmio.txt

   1 * QEMU PVPANIC MMIO Configuration bindings
   2
   3 QEMU's emulation / virtualization targets provide the following PVPANIC
   4 MMIO Configuration interface on the "virt" machine.
   5 type:
   6
   7 - a read-write, 16-bit wide data register.
   8
   9 QEMU exposes the data register to guests as memory mapped registers.
  10
  11 Required properties:
  12
  13 - compatible: "qemu,pvpanic-mmio".
  14 - reg: the MMIO region used by the device.
  15   * Bytes 0x0  Write panic event to the reg when guest OS panics.
  16   * Bytes 0x1  Reserved.
  17
  18 Example:
  19
  20 / {
  21         #size-cells = <0x2>;
  22         #address-cells = <0x2>;
  23
  24         pvpanic-mmio@9060000 {
  25                 compatible = "qemu,pvpanic-mmio";
  26                 reg = <0x0 0x9060000 0x0 0x2>;
  27         };
  28 };
  29