Re: obtain a list of granttable PFNs from toolstack

[Jan Beulich <jbeulich@xxxxxxxx>]

On 28.04.2021 09:50, Olaf Hering wrote:
> Is there an API to get a list of PFNs which are currently being active in the 
> grant table for a given domid?

Do you really mean PFNs? For PV, the P <=> M relationship is
guest-managed, and hence any value returned here would be stale by
the time the caller gets to use it, even if the grant table itself
didn't change.

Also, what do you mean by "active in the grant table"? A grant
present in the table referencing said page? Or a page comprising
the grant table? In the latter case, the acquire-resource interface
would allow you to obtain the MFNs from a PV guest; a HVM caller
would specify GFNs as input, for the MFNs to get (foreign-)mapped
at instead.

Jan