diff options
| author | Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com> | 2023-03-17 22:23:35 +0530 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2023-12-19 18:30:20 -0500 |
| commit | eb230dc47dd6f543ae2ff9c85bbe86243502e171 (patch) | |
| tree | 3ae5eaa3ec9a32ab2434c6527a7b4581fefc8837 /drivers/gpu/drm/xe/xe_wopcm.c | |
| parent | 1a653b879d6e408813096434ece5fa46c0752343 (diff) | |
| download | lwn-eb230dc47dd6f543ae2ff9c85bbe86243502e171.tar.gz lwn-eb230dc47dd6f543ae2ff9c85bbe86243502e171.zip | |
drm/xe: Use max wopcm size when validating the preset GuC wopcm size
When the GuC wopcm base and size registers are populated by BIOS/IFWI,
validate the parameters against the maximum allowed wopcm size.
Bpsec: 44982
Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'drivers/gpu/drm/xe/xe_wopcm.c')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_wopcm.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_wopcm.c b/drivers/gpu/drm/xe/xe_wopcm.c index 7bb880355f6b..c8cc3f5e6154 100644 --- a/drivers/gpu/drm/xe/xe_wopcm.c +++ b/drivers/gpu/drm/xe/xe_wopcm.c @@ -54,6 +54,8 @@ for MTL, do a proper probe sooner or later */ #define GEN11_WOPCM_SIZE SZ_2M + +#define GEN12_MAX_WOPCM_SIZE SZ_8M /* 16KB WOPCM (RSVD WOPCM) is reserved from HuC firmware top. */ #define WOPCM_RESERVED_SIZE SZ_16K @@ -221,6 +223,13 @@ int xe_wopcm_init(struct xe_wopcm *wopcm) if (locked) { drm_dbg(&xe->drm, "GuC WOPCM is already locked [%uK, %uK)\n", guc_wopcm_base / SZ_1K, guc_wopcm_size / SZ_1K); + /* + * When the GuC wopcm base and size are preprogrammed by + * BIOS/IFWI, check against the max allowed wopcm size to + * validate if the programmed values align to the wopcm layout. + */ + wopcm->size = GEN12_MAX_WOPCM_SIZE; + goto check; } |