On 13.07.21 16:19, Julien Grall wrote:
> Hi Jan,
> 
> On 13/07/2021 15:14, Jan Beulich wrote:
>>> And I don't think it should be named XC_PAGE_*, but rather XEN_PAGE_*.
>>
>> Even that doesn't seem right to me, at least in principle. There 
>> shouldn't
>> be a build time setting when it may vary at runtime. IOW on Arm I think a
>> runtime query to the hypervisor would be needed instead.
> 
> Yes, we want to be able to use the same userspace/OS without rebuilding 
> to a specific hypervisor page size.

This define is used for accessing data of other domains. See the define
for XEN_PAGE_SIZE in xen/include/public/io/ring.h

So it should be a constant (minimal) page size for all hypervisors and
guests of an architecture.


Juergen