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drm/amdgpu/uapi: Clarify comment on AMDGPU_VM_PAGE_PRT

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In the context of the amdgpu uAPI, the PRT flag is referring only
to unmapped pages of a partially resident texture (aka. sparse
resource), but not the full resource.

Virtual addresses marked with this flag behave as follows:
- Reads return zero
- Writes are discarded

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Timur Kristóf 2025-11-19 10:25:43 +01:00 committed by Alex Deucher
parent 550c6f5b90
commit c3cd568d31
1 changed files with 1 additions and 1 deletions
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2
include/uapi/drm/amdgpu_drm.h
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@ -883,7 +883,7 @@ struct drm_amdgpu_gem_list_handles_entry {
#define AMDGPU_VM_PAGE_WRITEABLE (1 << 2)
/* executable mapping, new for VI */
#define AMDGPU_VM_PAGE_EXECUTABLE (1 << 3)
/* partially resident texture */
/* unmapped page of partially resident textures */
#define AMDGPU_VM_PAGE_PRT (1 << 4)
/* MTYPE flags use bit 5 to 8 */
#define AMDGPU_VM_MTYPE_MASK (0xf << 5)