Hi,

Have got an issue which needs some extra space at end of a bo,
space unvisible to the userspace. So i was wondering if anyone
else would have a need for function which allow to add some more
page at the end of a bo (could also allow to put it at the begining
of the bo).

Before i start doing code i wanted to get feeback on that as this
would need a bit of change to ttm to get this feature. (mostly
decoupling the num of pages the user ask from the num of page the
driver wants, and then changing place in ttm to use one or the
others number depending on what they achieve).

Cheers,
Jerome Glisse

Note: For reference my issue is with cursor on old radeon hw,
cursor must be in the next 128M from the crtc scanout buffer. We
got issue when someone start to resize their screen at which
point the scanout buffer can endup after the cursor in vram.
Other solution would be to add multiple bo adjacent validation
function to ttm (likely less ttm change).


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