diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 429de0ad6cd4..699292eae02e 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2151,6 +2151,10 @@ enum i915_power_well_id {
 #define   GEN8_MCR_SLICE_MASK		GEN8_MCR_SLICE(3)
 #define   GEN8_MCR_SUBSLICE(subslice)	(((subslice) & 3) << 24)
 #define   GEN8_MCR_SUBSLICE_MASK	GEN8_MCR_SUBSLICE(3)
+#define   GEN11_MCR_SLICE(slice)	(((slice) & 0xf) << 27)
+#define   GEN11_MCR_SLICE_MASK		GEN11_MCR_SLICE(0xf)
+#define   GEN11_MCR_SUBSLICE(subslice)	(((subslice) & 0x7) << 24)
+#define   GEN11_MCR_SUBSLICE_MASK	GEN11_MCR_SUBSLICE(0x7)
 #define RING_IPEIR(base)	_MMIO((base)+0x64)
 #define RING_IPEHR(base)	_MMIO((base)+0x68)
 /*
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index 337dfa56a738..de09fa42a509 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -800,10 +800,24 @@ static inline uint32_t
 read_subslice_reg(struct drm_i915_private *dev_priv, int slice,
 		  int subslice, i915_reg_t reg)
 {
+	uint32_t mcr_slice_subslice_mask;
+	uint32_t mcr_slice_subslice_select;
 	uint32_t mcr;
 	uint32_t ret;
 	enum forcewake_domains fw_domains;
 
+	if (INTEL_GEN(dev_priv) >= 11) {
+		mcr_slice_subslice_mask = GEN11_MCR_SLICE_MASK |
+					  GEN11_MCR_SUBSLICE_MASK;
+		mcr_slice_subslice_select = GEN11_MCR_SLICE(slice) |
+					    GEN11_MCR_SUBSLICE(subslice);
+	} else {
+		mcr_slice_subslice_mask = GEN8_MCR_SLICE_MASK |
+					  GEN8_MCR_SUBSLICE_MASK;
+		mcr_slice_subslice_select = GEN8_MCR_SLICE(slice) |
+					    GEN8_MCR_SUBSLICE(subslice);
+	}
+
 	fw_domains = intel_uncore_forcewake_for_reg(dev_priv, reg,
 						    FW_REG_READ);
 	fw_domains |= intel_uncore_forcewake_for_reg(dev_priv,
@@ -818,14 +832,14 @@ read_subslice_reg(struct drm_i915_private *dev_priv, int slice,
 	 * The HW expects the slice and sublice selectors to be reset to 0
 	 * after reading out the registers.
 	 */
-	WARN_ON_ONCE(mcr & (GEN8_MCR_SLICE_MASK | GEN8_MCR_SUBSLICE_MASK));
-	mcr &= ~(GEN8_MCR_SLICE_MASK | GEN8_MCR_SUBSLICE_MASK);
-	mcr |= GEN8_MCR_SLICE(slice) | GEN8_MCR_SUBSLICE(subslice);
+	WARN_ON_ONCE(mcr & mcr_slice_subslice_mask);
+	mcr &= ~mcr_slice_subslice_mask;
+	mcr |= mcr_slice_subslice_select;
 	I915_WRITE_FW(GEN8_MCR_SELECTOR, mcr);
 
 	ret = I915_READ_FW(reg);
 
-	mcr &= ~(GEN8_MCR_SLICE_MASK | GEN8_MCR_SUBSLICE_MASK);
+	mcr &= ~mcr_slice_subslice_mask;
 	I915_WRITE_FW(GEN8_MCR_SELECTOR, mcr);
 
 	intel_uncore_forcewake_put__locked(dev_priv, fw_domains);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 1f50727a5ddb..a02c7b3b9d55 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -86,7 +86,7 @@ hangcheck_action_to_str(const enum intel_engine_hangcheck_action a)
 }
 
 #define I915_MAX_SLICES	3
-#define I915_MAX_SUBSLICES 3
+#define I915_MAX_SUBSLICES 8
 
 #define instdone_slice_mask(dev_priv__) \
 	(INTEL_GEN(dev_priv__) == 7 ? \