diff options
| author | Matthew Auld <matthew.auld@intel.com> | 2021-10-28 10:26:37 +0100 |
|---|---|---|
| committer | Matthew Auld <matthew.auld@intel.com> | 2021-10-29 09:03:27 +0100 |
| commit | 2ca776068f1f9ece3ab093f1be39c87653fbff16 (patch) | |
| tree | 59435e4bf60ebf9af2ff5430a2af588065f7e391 /drivers/gpu/drm/i915/gt/intel_gtt.c | |
| parent | 77cdd054dd2ced6cb6f3420a998d6a0a65d6076e (diff) | |
drm/i915/gtt: flush the scratch page
The scratch page is directly visible in the users address space, and
while this is forced as CACHE_LLC, by the kernel, we still have to
contend with things like "Bypass-LLC" MOCS. So just flush no matter
what.
v2(Thomas):
- Make sure we use drm_clflush_virt_range here, in case clflush support
is missing.
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211028092638.3142258-1-matthew.auld@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_gtt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_gtt.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c b/drivers/gpu/drm/i915/gt/intel_gtt.c index 67d14afa6623..0dd254cb1f69 100644 --- a/drivers/gpu/drm/i915/gt/intel_gtt.c +++ b/drivers/gpu/drm/i915/gt/intel_gtt.c @@ -7,6 +7,8 @@ #include <linux/fault-inject.h> +#include <drm/drm_cache.h> + #include "gem/i915_gem_lmem.h" #include "i915_trace.h" #include "intel_gt.h" @@ -273,6 +275,7 @@ static void poison_scratch_page(struct drm_i915_gem_object *scratch) val = POISON_FREE; memset(vaddr, val, scratch->base.size); + drm_clflush_virt_range(vaddr, scratch->base.size); } int setup_scratch_page(struct i915_address_space *vm) |