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

[nishit.sharma@intel.com]

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

With Wa_14026539277 active, KMD marks the 2-way-coherent PAT entries as
reserved in the debugfs pat_sw_config dump and they must not be used.
Skip the PAT-index madvise subtests when the selected PAT index is
reserved instead of decoding the coherency bits of the PAT entry.

Signed-off-by: Nishit Sharma <nishit.sharma@intel.com>
---
 tests/intel/xe_exec_system_allocator.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/tests/intel/xe_exec_system_allocator.c b/tests/intel/xe_exec_system_allocator.c
index 45ec62813..38e550896 100644
--- a/tests/intel/xe_exec_system_allocator.c
+++ b/tests/intel/xe_exec_system_allocator.c
@@ -26,6 +26,7 @@
 #include "xe/xe_gt.h"
 #include "xe/xe_ioctl.h"
 #include "xe/xe_query.h"
+#include "xe/xe_wa.h"
 #include <string.h>
 
 #define USER_FENCE_VALUE	0xdeadbeefdeadbeefull
@@ -1216,6 +1217,24 @@ 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_is_reserved(int fd, uint8_t pat_idx)
+{
+	struct intel_pat_cache pat_sw_config = {};
+	int32_t num_pat_entries;
+
+	if (!xe_wa(fd, "14026539277"))
+		return false;
+
+	num_pat_entries = xe_get_pat_sw_config(fd, &pat_sw_config, 0);
+	igt_assert_f(num_pat_entries > 0,
+		     "Couldn't get Xe PAT software configuration\n");
+
+	if (pat_idx >= num_pat_entries)
+		return false;
+
+	return pat_sw_config.entries[pat_idx].rsvd;
+}
+
 static void
 xe_vm_madvise_atomic_attr(int fd, uint32_t vm, uint64_t addr, uint64_t range,
 			  int mem_attr)
@@ -2887,6 +2906,9 @@ 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_is_reserved(fd, s->fn(fd)),
+				      "PAT index reserved by Wa_14026539277\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