[PATCH] tests/intel/xe_exec_system_allocator: Skip unsupported PAT madvise indices

[nishit.sharma@intel.com]

From: Nishit Sharma <nishit.sharma@intel.com>

Skip PAT-index madvise subtests when the selected 2-way coherent index is
rejected by the workaround, avoiding an assertion failure on
affected platforms.

Signed-off-by: Nishit Sharma <nishit.sharma@intel.com>
---
 tests/intel/xe_exec_system_allocator.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/tests/intel/xe_exec_system_allocator.c b/tests/intel/xe_exec_system_allocator.c
index 45ec62813..2519b9e62 100644
--- a/tests/intel/xe_exec_system_allocator.c
+++ b/tests/intel/xe_exec_system_allocator.c
@@ -1216,6 +1216,22 @@ xe_vm_madvixe_pat_attr(int fd, uint32_t vm, uint64_t addr, uint64_t range,
 		      DRM_XE_MEM_RANGE_ATTR_PAT, pat_index, 0, 0);
 }
 
+static bool pat_idx_unsupported_by_wa(int fd, uint8_t pat_idx)
+{
+	struct intel_pat_cache pat = {};
+	int32_t n;
+
+	if (intel_graphics_ver(intel_get_drm_devid(fd)) < IP_VER(35, 0) ||
+	    xe_has_vram(fd))
+		return false;
+
+	n = xe_get_pat_sw_config(fd, &pat, 0);
+	if (n <= pat_idx)
+		return false;
+
+	return (pat.entries[pat_idx].pat & 0x3) == 3;
+}
+
 static void
 xe_vm_madvise_atomic_attr(int fd, uint32_t vm, uint64_t addr, uint64_t range,
 			  int mem_attr)
@@ -2887,6 +2903,9 @@ int igt_main()
 			if (IS_PONTEVECCHIO(dev_id) &&
 			    strstr(s->name, "madvise-pat-idx-uc-comp-"))
 				igt_skip("Skipping compression-related PAT index on PVC\n");
+
+			igt_skip_on_f(pat_idx_unsupported_by_wa(fd, s->fn(fd)),
+				      "2-way coherent PAT index not allowed\n");
 			xe_for_each_engine(fd, hwe)
 				test_exec(fd, hwe, 1, 1, SZ_4M, 0, 0, NULL, NULL, s->flags, s->fn);
 		}
-- 
2.43.0