intel/perf: add support new variable counting the number of EUs in slice0-3

v2: MIN2(4, max_slices) (Marcin)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Marcin Ślusarz <marcin.slusarz@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16144>

src/intel/perf/gen_perf.py

@@ -214,6 +214,7 @@ hw_vars["$EuCoresTotalCount"] = "perf->sys_vars.n_eus"
 hw_vars["$EuSlicesTotalCount"] = "perf->sys_vars.n_eu_slices"
 hw_vars["$EuSubslicesTotalCount"] = "perf->sys_vars.n_eu_sub_slices"
 hw_vars["$EuDualSubslicesTotalCount"] = "perf->sys_vars.n_eu_sub_slices"
+hw_vars["$EuDualSubslicesSlice0123Count"] = "perf->sys_vars.n_eu_slice0123"
 hw_vars["$EuThreadsCount"] = "perf->devinfo.num_thread_per_eu"
 hw_vars["$SliceMask"] = "perf->sys_vars.slice_mask"
 # subslice_mask is interchangeable with subslice/dual-subslice since Gfx12+

src/intel/perf/intel_perf.c

@@ -352,6 +352,22 @@ compute_topology_builtins(struct intel_perf_config *perf)
    perf->sys_vars.slice_mask = devinfo->slice_masks;
    perf->sys_vars.n_eu_slices = devinfo->num_slices;
 
+   perf->sys_vars.n_eu_slice0123 = 0;
+   for (int s = 0; s < MIN2(4, devinfo->max_slices); s++) {
+      if (!intel_device_info_slice_available(devinfo, s))
+         continue;
+
+      for (int ss = 0; ss < devinfo->max_subslices_per_slice; ss++) {
+         if (!intel_device_info_subslice_available(devinfo, s, ss))
+            continue;
+
+         for (int eu = 0; eu < devinfo->max_eus_per_subslice; eu++) {
+            if (intel_device_info_eu_available(devinfo, s, ss, eu))
+               perf->sys_vars.n_eu_slice0123++;
+         }
+      }
+   }
+
    for (int i = 0; i < sizeof(devinfo->subslice_masks[i]); i++) {
       perf->sys_vars.n_eu_sub_slices +=
          util_bitcount(devinfo->subslice_masks[i]);

src/intel/perf/intel_perf.h

@@ -337,6 +337,7 @@ struct intel_perf_config {
       uint64_t n_eus;               /** $EuCoresTotalCount */
       uint64_t n_eu_slices;         /** $EuSlicesTotalCount */
       uint64_t n_eu_sub_slices;     /** $EuSubslicesTotalCount */
+      uint64_t n_eu_slice0123;      /** $EuDualSubslicesSlice0123Count */
       uint64_t slice_mask;          /** $SliceMask */
       uint64_t subslice_mask;       /** $SubsliceMask */
       uint64_t gt_min_freq;         /** $GpuMinFrequency */