Hi Ram and Matt, > On some platforms the hw has dropped support for 4K GTT pages when > dealing with LMEM, and due to the design of 64K GTT pages in the hw, we > can only mark the *entire* page-table as operating in 64K GTT mode, > since the enable bit is still on the pde, and not the pte. And since we > we still need to allow 4K GTT pages for SMEM objects, we can't have a > "normal" 4K page-table with scratch pointing to LMEM, since that's > undefined from the hw pov. The simplest solution is to just move the 64K > scratch page to SMEM on such platforms and call it a day, since that > should work for all configurations. > > Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx> > Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx> > Reviewed-by: Thomas Hellstrom <thomas.hellstrom@xxxxxxxxxxxxxxx> Reviewed-by: Andi Shyti <andi.shyti@xxxxxxxxxxxxxxx> Andi
