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Subject: Re: [virtio-comment] [PATCH] content: Reserve virtio-watchog device ID

Rob Bradford <robert.bradford@intel.com> 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 <robert.bradford@intel.com>

Reviewed-by: Alex BennÃe <alex.bennee@linaro.org>

Alex BennÃe

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