From 96eb895c7ec62b5ae76ea697770fabe9e48f8107 Mon Sep 17 00:00:00 2001 From: Michal Wajdeczko Date: Tue, 13 Feb 2024 16:43:54 +0100 Subject: [PATCH] drm/xe/vf: Don't program PAT if VF PAT programming can only be done by the PF driver. Besides VF drivers don't have access to control registers. Signed-off-by: Michal Wajdeczko Cc: Matt Roper Reviewed-by: Matt Roper Link: https://patchwork.freedesktop.org/patch/msgid/20240213154355.1221-8-michal.wajdeczko@intel.com --- drivers/gpu/drm/xe/xe_pat.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/xe/xe_pat.c b/drivers/gpu/drm/xe/xe_pat.c index 1ff6bc79e7d44..e148934d554b0 100644 --- a/drivers/gpu/drm/xe/xe_pat.c +++ b/drivers/gpu/drm/xe/xe_pat.c @@ -13,6 +13,7 @@ #include "xe_gt.h" #include "xe_gt_mcr.h" #include "xe_mmio.h" +#include "xe_sriov.h" #define _PAT_ATS 0x47fc #define _PAT_INDEX(index) _PICK_EVEN_2RANGES(index, 8, \ @@ -433,6 +434,10 @@ void xe_pat_init_early(struct xe_device *xe) drm_err(&xe->drm, "Missing PAT table for platform with graphics version %d.%02d!\n", GRAPHICS_VER(xe), GRAPHICS_VERx100(xe) % 100); } + + /* VFs can't program nor dump PAT settings */ + if (IS_SRIOV_VF(xe)) + xe->pat.ops = NULL; } void xe_pat_init(struct xe_gt *gt) -- 2.30.2