* [virtio-comment] [PATCH] content: Reserve virtio-watchog device ID
@ 2020-10-21 13:58 Rob Bradford
2020-10-22 15:09 ` Alex Bennée
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Rob Bradford @ 2020-10-21 13:58 UTC (permalink / raw)
To: virtio-comment; +Cc: Rob Bradford
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.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
---
content.tex | 2 ++
1 file changed, 2 insertions(+)
diff --git a/content.tex b/content.tex
index bc26674..6f8ec8f 100644
--- a/content.tex
+++ b/content.tex
@@ -2819,6 +2819,8 @@ \chapter{Device Types}\label{sec:Device Types}
\hline
33 & NitroSecureModule \\
\hline
+35 & Watchdog \\
+\hline
\end{tabular}
Some of the devices above are unspecified by this document,
--
2.26.2
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^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [virtio-comment] [PATCH] content: Reserve virtio-watchog device ID
2020-10-21 13:58 [virtio-comment] [PATCH] content: Reserve virtio-watchog device ID Rob Bradford
@ 2020-10-22 15:09 ` Alex Bennée
2020-10-23 13:48 ` Stefan Hajnoczi
2020-10-29 9:25 ` Cornelia Huck
2 siblings, 0 replies; 6+ messages in thread
From: Alex Bennée @ 2020-10-22 15:09 UTC (permalink / raw)
To: Rob Bradford; +Cc: virtio-comment, Stratos-dev
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 Bennée <alex.bennee@linaro.org>
--
Alex Bennée
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [virtio-comment] [PATCH] content: Reserve virtio-watchog device ID
2020-10-21 13:58 [virtio-comment] [PATCH] content: Reserve virtio-watchog device ID Rob Bradford
2020-10-22 15:09 ` Alex Bennée
@ 2020-10-23 13:48 ` Stefan Hajnoczi
2020-10-29 9:25 ` Cornelia Huck
2 siblings, 0 replies; 6+ messages in thread
From: Stefan Hajnoczi @ 2020-10-23 13:48 UTC (permalink / raw)
To: Rob Bradford; +Cc: virtio-comment
[-- Attachment #1: Type: text/plain, Size: 501 bytes --]
On Wed, Oct 21, 2020 at 02:58:47PM +0100, Rob Bradford wrote:
> 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.
>
> Signed-off-by: Rob Bradford <robert.bradford@intel.com>
> ---
> content.tex | 2 ++
> 1 file changed, 2 insertions(+)
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
[-- Attachment #2: signature.asc --]
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [virtio-comment] [PATCH] content: Reserve virtio-watchog device ID
2020-10-21 13:58 [virtio-comment] [PATCH] content: Reserve virtio-watchog device ID Rob Bradford
2020-10-22 15:09 ` Alex Bennée
2020-10-23 13:48 ` Stefan Hajnoczi
@ 2020-10-29 9:25 ` Cornelia Huck
2020-10-29 10:36 ` Michael S. Tsirkin
2 siblings, 1 reply; 6+ messages in thread
From: Cornelia Huck @ 2020-10-29 9:25 UTC (permalink / raw)
To: Rob Bradford; +Cc: virtio-comment, Michael S . Tsirkin
On Wed, 21 Oct 2020 14:58:47 +0100
Rob Bradford <robert.bradford@intel.com> wrote:
> 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.
>
> Signed-off-by: Rob Bradford <robert.bradford@intel.com>
> ---
> content.tex | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/content.tex b/content.tex
> index bc26674..6f8ec8f 100644
> --- a/content.tex
> +++ b/content.tex
> @@ -2819,6 +2819,8 @@ \chapter{Device Types}\label{sec:Device Types}
> \hline
> 33 & NitroSecureModule \\
> \hline
> +35 & Watchdog \\
> +\hline
> \end{tabular}
>
> Some of the devices above are unspecified by this document,
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Time to vote on this (and the patch reserving 34 for I2C?)
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [virtio-comment] [PATCH] content: Reserve virtio-watchog device ID
2020-10-29 9:25 ` Cornelia Huck
@ 2020-10-29 10:36 ` Michael S. Tsirkin
2020-10-30 16:34 ` [virtio-comment] [PATCH] content: Reserve virtio-watchdog " Rob Bradford
0 siblings, 1 reply; 6+ messages in thread
From: Michael S. Tsirkin @ 2020-10-29 10:36 UTC (permalink / raw)
To: Cornelia Huck; +Cc: Rob Bradford, virtio-comment
On Thu, Oct 29, 2020 at 10:25:36AM +0100, Cornelia Huck wrote:
> On Wed, 21 Oct 2020 14:58:47 +0100
> Rob Bradford <robert.bradford@intel.com> wrote:
>
> > 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.
> >
> > Signed-off-by: Rob Bradford <robert.bradford@intel.com>
> > ---
> > content.tex | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/content.tex b/content.tex
> > index bc26674..6f8ec8f 100644
> > --- a/content.tex
> > +++ b/content.tex
> > @@ -2819,6 +2819,8 @@ \chapter{Device Types}\label{sec:Device Types}
> > \hline
> > 33 & NitroSecureModule \\
> > \hline
> > +35 & Watchdog \\
> > +\hline
> > \end{tabular}
> >
> > Some of the devices above are unspecified by this document,
>
> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
>
> Time to vote on this (and the patch reserving 34 for I2C?)
Send Fixes: tag then?
>
> This publicly archived list offers a means to provide input to the
> OASIS Virtual I/O Device (VIRTIO) TC.
>
> In order to verify user consent to the Feedback License terms and
> to minimize spam in the list archive, subscription is required
> before posting.
>
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^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-10-30 16:34 UTC | newest]
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2020-10-21 13:58 [virtio-comment] [PATCH] content: Reserve virtio-watchog device ID Rob Bradford
2020-10-22 15:09 ` Alex Bennée
2020-10-23 13:48 ` Stefan Hajnoczi
2020-10-29 9:25 ` Cornelia Huck
2020-10-29 10:36 ` Michael S. Tsirkin
2020-10-30 16:34 ` [virtio-comment] [PATCH] content: Reserve virtio-watchdog " Rob Bradford
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