Commit eb230dc4 authored by Balasubramani Vivekanandan's avatar Balasubramani Vivekanandan Committed by Rodrigo Vivi
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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: default avatarBalasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Reviewed-by: default avatarMatthew Brost <matthew.brost@intel.com>
Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
parent 1a653b87

drivers/gpu/drm/xe/xe_wopcm.c

+9 −0
Original line number Diff line number Diff line
@@ -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;

	}