Rob Bradford <> writes:
> Reserve an ID for a watchdog device which may be used to ensure that the
> guest is responsive. This is equivalent of a hardware watchdog device
> and will trigger the reboot of the guest if the the host does not
> periodic ping from the the guest.
Out of interest is your watchdog device also going to allow for straight
power/reset control?
The use case I'm thinking of is QEMU's -m virt machine which is a purely
virtual machine which is a target for a number of firmware/bootcode
projects. QEMU provides a firmware emulation that will do the right
thing if you issue PSCI supervisor calls and you have directly loaded a
kernel. However if you are testing firmware - for example EDK2 or Arm
Trusted Firmware it is expected to make the final hw appropriate twiddle
to reboot the machine and of course that is undefined for -m virt.
> Signed-off-by: Rob Bradford <>
Reviewed-by: Alex BennÃe <>
--
Alex BennÃe
