drm/i915: Reserve some kernel space per vm

Browse source

Reserve one page in each vm for kernel space to use for things
such as workarounds.

v2: use real memory, do not decrease vm.total
v4: reserve only one page and explain flag
v5: remove allocated object on ppgtt cleanup
v6: decrease vm->total by reservation size

Suggested-by: Chris Wilson <chris.p.wilson@linux.intel.com>
Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231026-wabb-v6-1-4aa7d55d0a8a@intel.com

...

This commit is contained in:

Andrzej Hajda 2023-10-26 20:36:26 +02:00

parent 8aa519f175

commit 9bb66c179f

No known key found for this signature in database

GPG key ID: 2362B293DE10FDD7

2 changed files with 47 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

43

drivers/gpu/drm/i915/gt/gen8_ppgtt.c

View file

4

drivers/gpu/drm/i915/gt/intel_gtt.h

View file