Re: [PATCH 4/5] xen/memory: Fix acquire_resource size semantics

[Julien Grall <julien@xxxxxxx>]

Hi Andrew,

On 30/07/2020 20:46, Andrew Cooper wrote:
> On 30/07/2020 09:31, Paul Durrant wrote:
> In between these two hypercalls from the utility, the guest can do a
> v1=>v2 or v2=>v1 switch and make the resource spontaneously appear or
> disappear.
This can only happen on platform where grant-table v2 is enabled. Where 
this is not enabled (e.g Arm), then I think we want to return 0 as there 
is nothing to map.
Cheers,

--
Julien Grall