Re: [PATCH v5 1/3] xen/mm: Introduce mm-types.h

[Andrew Cooper <andrew.cooper3@citrix.com>]

On 25/04/2025 1:48 pm, Jan Beulich wrote:
> On 25.04.2025 13:24, Andrew Cooper wrote:
>> The type used for pagetable attributes/permissions is currently unsigned int,
>> but needs to become architecture dependent as PPC needs unsigned long.
>>
>> Introduce mm-types.h to house pte_attr_t.
>>
>> Given the new toolchain baseline, we can use __has_include() now to remove the
>> need for boilerplate on most architectures.
> That's true now, when it's just pte_attr_t that's there. Memory management,
> however, is pretty different between architectures, so I wonder if in the
> longer run any one will remain that actually can use the common header.

Anything in xen/mm.h is common and needs architectures to provide (or
use the defaults) the bits required.

asm/mm{,-types.h} still exist (when necessary) to provide the
arch-specific extensions.

~Andrew