Required for Bindless samplers.
Do Linux UMDs make use of this? This change has been security
reviewed and the whitelisting approved. Virtualization of other
OSes could certainly use it.
v2: Rebased on top of the WA refactoring
Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
Signed-off-by: Oscar Mateo <oscar.mateo@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_reg.h | 2 ++
drivers/gpu/drm/i915/intel_workarounds.c | 5 +++++
2 files changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index d008a70..3394cc0 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8258,6 +8258,8 @@ enum {
#define TR_VA_TTL3_PTR_DW0 _MMIO(0x4DE0)
#define TR_VA_TTL3_PTR_DW1 _MMIO(0x4DE4)
+#define GEN10_SAMPLER_MODE _MMIO(0xE18C)
+
/* IVYBRIDGE DPF */
#define GEN7_L3CDERRST1(slice) _MMIO(0xB008 + (slice) * 0x200) /* L3CD Error Status 1 */
#define GEN7_L3CDERRST1_ROW_MASK (0x7ff<<14)
diff --git a/drivers/gpu/drm/i915/intel_workarounds.c b/drivers/gpu/drm/i915/intel_workarounds.c
index b52ac41..d8f0cf9 100644
--- a/drivers/gpu/drm/i915/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/intel_workarounds.c
@@ -981,6 +981,11 @@ static int icl_whitelist_workarounds_apply(struct intel_engine_cs *engine)
if (ret)
return ret;
+ /* WaAllowUMDToModifySamplerMode:icl */
+ ret = wa_ring_whitelist_reg(engine, GEN10_SAMPLER_MODE);
+ if (ret)
+ return ret;
+
return 0;
}
--
1.9.1
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