Re: [Qemu-devel] [PATCH v6 17/23] qapi: add SEV_MEASUREMENT event

[Markus Armbruster]

Brijesh Singh <address@hidden> writes:

> Add SEV_MEASUREMENT event which can be used by libvirt to get the
> measurement of the memory regions encrypted through the SEV launch
> flow. The measurement value is base64 encoded.
>
> Cc: Daniel P. Berrange <address@hidden>
> Cc: Eric Blake <address@hidden>
> Cc: Markus Armbruster <address@hidden>
> Signed-off-by: Brijesh Singh <address@hidden>
> ---
>  qapi-schema.json | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
>
> diff --git a/qapi-schema.json b/qapi-schema.json
> index 2046c96669bf..e1f5d14e2e3f 100644
> --- a/qapi-schema.json
> +++ b/qapi-schema.json
> @@ -3192,3 +3192,16 @@
>  # Since: 2.11
>  ##
>  { 'command': 'watchdog-set-action', 'data' : {'action': 'WatchdogAction'} }
> +
> +##
> +# @SEV_MEASUREMENT:
> +#
> +# Emitted when measurement is available for the SEV guest.
> +#
> +# @value: measurement value encoded in base64
> +#
> +# Since: 2.12
> +#
> +##
> +{ 'event' : 'SEV_MEASUREMENT',
> +  'data' : { 'value' : 'str' } }

New event -> automatic question: do we need a way to poll for this
information?  Say when an event could get lost during a libvirt restart.