[PATCH i-g-t 06/10] tests/intel/xe_pat: Adapt pat_entry_is_wb() to Xe3p

Xe3p introduces a new device-cache policy called XA, which has the
longer name "WB Transient App".

Even though commit 4e59b8e7779b ("lib/intel_pat: use kernel debugfs as
authoritative PAT source for Xe") already gives a clue that XA is a
"write-back" cache policy type, pat_entry_is_wb() doesn't really
incorporate that information.  Add the necessary logic to
pat_entry_is_wb() so that it also considers XA starting with Xe3p.

Bspec: 71582
Signed-off-by: Gustavo Sousa <[email protected]>
---
 tests/intel/xe_pat.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tests/intel/xe_pat.c b/tests/intel/xe_pat.c
index 9dd4ffb69d11..bb2975b545e6 100644
--- a/tests/intel/xe_pat.c
+++ b/tests/intel/xe_pat.c
@@ -142,6 +142,13 @@ static bool pat_entry_is_uc(unsigned int gfx_ver, uint32_t pat)
 
 static bool pat_entry_is_wb(unsigned int gfx_ver, uint32_t pat)
 {
+	if (gfx_ver >= IP_VER(35, 0)) {
+		uint32_t l3 = REG_FIELD_GET(XE2_L3_POLICY, pat);
+
+		return l3 == L3_CACHE_POLICY_WB || l3 == L3_CACHE_POLICY_XD ||
+		       l3 == L3_CACHE_POLICY_XA;
+	}
+
 	if (gfx_ver >= IP_VER(20, 0)) {
 		uint32_t l3 = REG_FIELD_GET(XE2_L3_POLICY, pat);
 

-- 
2.55.0