[Mesa-dev] [PATCH 1/2] gallium: Add PIPE_CAP_USER_MEMORY_PAGE_SIZE for page size of user pointers

Alex Deucher alexdeucher at gmail.com
Thu Aug 17 02:48:00 UTC 2017

On Wed, Aug 16, 2017 at 10:39 PM, Michel Dänzer <michel at daenzer.net> wrote:
> On 17/08/17 10:52 AM, Aaron Watry wrote:
>> PIPE_CAP_RESOURCE_FROM_USER_MEMORY says that size must be page aligned,
>> but doesn't necessarily say anything about the size of those pages.
> Is there any case known so far where it's not the CPU page size?

It's always the CPU page size.  The limitation is not a hw limitation,
it's a sw limitation with the way the kernel handles creating BOs from
user memory.


> --
> Earthling Michel Dänzer               |               http://www.amd.com
> Libre software enthusiast             |             Mesa and X developer
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