diff --git a/drivers/gpu/drm/xe/xe_gt_mcr.c b/drivers/gpu/drm/xe/xe_gt_mcr.c
index 6d948a469126..7d7bd0be6233 100644
--- a/drivers/gpu/drm/xe/xe_gt_mcr.c
+++ b/drivers/gpu/drm/xe/xe_gt_mcr.c
@@ -8,8 +8,10 @@
 #include "regs/xe_gt_regs.h"
 #include "xe_assert.h"
 #include "xe_gt.h"
+#include "xe_gt_printk.h"
 #include "xe_gt_topology.h"
 #include "xe_gt_types.h"
+#include "xe_guc_hwconfig.h"
 #include "xe_mmio.h"
 #include "xe_sriov.h"
 
@@ -297,6 +299,36 @@ static void init_steering_mslice(struct xe_gt *gt)
 
 static unsigned int dss_per_group(struct xe_gt *gt)
 {
+	struct xe_guc *guc = &gt->uc.guc;
+	u32 max_slices = 0, max_subslices = 0;
+	int ret;
+
+	/*
+	 * Try to query the GuC's hwconfig table for the maximum number of
+	 * slices and subslices.  These don't reflect the platform's actual
+	 * slice/DSS counts, just the physical layout by which we should
+	 * determine the steering targets.  On older platforms with older GuC
+	 * firmware releases it's possible that these attributes may not be
+	 * included in the table, so we can always fall back to the old
+	 * hardcoded layouts.
+	 */
+#define HWCONFIG_ATTR_MAX_SLICES	1
+#define HWCONFIG_ATTR_MAX_SUBSLICES	70
+
+	ret = xe_guc_hwconfig_lookup_u32(guc, HWCONFIG_ATTR_MAX_SLICES,
+					 &max_slices);
+	if (ret < 0 || max_slices == 0)
+		goto fallback;
+
+	ret = xe_guc_hwconfig_lookup_u32(guc, HWCONFIG_ATTR_MAX_SUBSLICES,
+					 &max_subslices);
+	if (ret < 0 || max_subslices == 0)
+		goto fallback;
+
+	return DIV_ROUND_UP(max_subslices, max_slices);
+
+fallback:
+	xe_gt_dbg(gt, "GuC hwconfig cannot provide dss/slice; using typical fallback values\n");
 	if (gt_to_xe(gt)->info.platform == XE_PVC)
 		return 8;
 	else if (GRAPHICS_VERx100(gt_to_xe(gt)) >= 1250)
@@ -314,16 +346,16 @@ static unsigned int dss_per_group(struct xe_gt *gt)
  */
 void xe_gt_mcr_get_dss_steering(struct xe_gt *gt, unsigned int dss, u16 *group, u16 *instance)
 {
-	int dss_per_grp = dss_per_group(gt);
-
 	xe_gt_assert(gt, dss < XE_MAX_DSS_FUSE_BITS);
 
-	*group = dss / dss_per_grp;
-	*instance = dss % dss_per_grp;
+	*group = dss / gt->steering_dss_per_grp;
+	*instance = dss % gt->steering_dss_per_grp;
 }
 
 static void init_steering_dss(struct xe_gt *gt)
 {
+	gt->steering_dss_per_grp = dss_per_group(gt);
+
 	xe_gt_mcr_get_dss_steering(gt,
 				   min(xe_dss_mask_group_ffs(gt->fuse_topo.g_dss_mask, 0, 0),
 				       xe_dss_mask_group_ffs(gt->fuse_topo.c_dss_mask, 0, 0)),
diff --git a/drivers/gpu/drm/xe/xe_gt_types.h b/drivers/gpu/drm/xe/xe_gt_types.h
index 8e46c0969bc7..82cf9f631736 100644
--- a/drivers/gpu/drm/xe/xe_gt_types.h
+++ b/drivers/gpu/drm/xe/xe_gt_types.h
@@ -376,6 +376,12 @@ struct xe_gt {
 		u16 instance_target;
 	} steering[NUM_STEERING_TYPES];
 
+	/**
+	 * @steering_dss_per_grp: number of DSS per steering group (gslice,
+	 *    cslice, etc.).
+	 */
+	unsigned int steering_dss_per_grp;
+
 	/**
 	 * @mcr_lock: protects the MCR_SELECTOR register for the duration
 	 *    of a steered operation
diff --git a/drivers/gpu/drm/xe/xe_guc_hwconfig.c b/drivers/gpu/drm/xe/xe_guc_hwconfig.c
index 025bad701556..af2c817d552c 100644
--- a/drivers/gpu/drm/xe/xe_guc_hwconfig.c
+++ b/drivers/gpu/drm/xe/xe_guc_hwconfig.c
@@ -160,3 +160,43 @@ void xe_guc_hwconfig_dump(struct xe_guc *guc, struct drm_printer *p)
 
 	kfree(hwconfig);
 }
+
+/*
+ * Lookup a specific 32-bit attribute value in the GuC's hwconfig table.
+ */
+int xe_guc_hwconfig_lookup_u32(struct xe_guc *guc, u32 attribute, u32 *val)
+{
+	size_t size = xe_guc_hwconfig_size(guc);
+	u64 num_dw = div_u64(size, sizeof(u32));
+	u32 *hwconfig;
+	bool found = false;
+	int i = 0;
+
+	if (num_dw == 0)
+		return -EINVAL;
+
+	hwconfig = kzalloc(size, GFP_KERNEL);
+	if (!hwconfig)
+		return -ENOMEM;
+
+	xe_guc_hwconfig_copy(guc, hwconfig);
+
+	/* An entry requires at least three dwords for key, length, value */
+	while (i + 3 <= num_dw) {
+		u32 key = hwconfig[i++];
+		u32 len_dw = hwconfig[i++];
+
+		if (key != attribute) {
+			i += len_dw;
+			continue;
+		}
+
+		*val = hwconfig[i];
+		found = true;
+		break;
+	}
+
+	kfree(hwconfig);
+
+	return found ? 0 : -ENOENT;
+}
diff --git a/drivers/gpu/drm/xe/xe_guc_hwconfig.h b/drivers/gpu/drm/xe/xe_guc_hwconfig.h
index 7df315900e1c..ab4e5038236e 100644
--- a/drivers/gpu/drm/xe/xe_guc_hwconfig.h
+++ b/drivers/gpu/drm/xe/xe_guc_hwconfig.h
@@ -15,5 +15,6 @@ int xe_guc_hwconfig_init(struct xe_guc *guc);
 u32 xe_guc_hwconfig_size(struct xe_guc *guc);
 void xe_guc_hwconfig_copy(struct xe_guc *guc, void *dst);
 void xe_guc_hwconfig_dump(struct xe_guc *guc, struct drm_printer *p);
+int xe_guc_hwconfig_lookup_u32(struct xe_guc *guc, u32 attribute, u32 *val);
 
 #endif