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drm/xe/vram: report FLAT_CCS base misalignment

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So we can easily check if a machine had the CCS bug, when looking back
over bug reports where we have the same machine with newer kernel.

Example print for a machine with the CCS bug:

  FLAT_CCS base:27bbff800, aligned:no

v2 (Matt B):
  - Unconditionally print the base + alignment

Fixes: 3717339274 ("drm/xe/vram: fix ccs offset calculation")
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: stable@kernel.org
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20260902124117.918018-9-matthew.auld@intel.com
(cherry picked from commit d00b7f4f03bbeb2efad872f1686130e18c2b4141)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Matthew Auld 2026-09-02 13:41:20 +01:00 committed by Rodrigo Vivi
parent 3663c8d1f3
commit 0e68c74e44
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1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/xe/xe_vram.c
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@ -90,6 +90,9 @@ static int get_flat_ccs_offset(struct xe_gt *gt, u64 tile_size, u64 *poffset)
offset |= offset_lo << 6; /* HW view bits 31:6 */
offset *= num_enabled; /* convert to SW view */
drm_info(&xe->drm, "FLAT_CCS base:%llx, aligned:%s\n", offset,
str_yes_no(IS_ALIGNED(offset, SZ_128K)));
/*
* Everything below this offset is handed to the VRAM
* allocator, so it has to be the *first* address the