Xe2 Caching demotion for L3XD|L4WT|NC request (#212)

johnmach · web-flow · commit 567dc09fd385 · 2024-09-06T15:21:19.000+05:30
diff --git a/Source/GmmLib/CachePolicy/GmmXe2_LPGCachePolicy.cpp b/Source/GmmLib/CachePolicy/GmmXe2_LPGCachePolicy.cpp
@@ -130,7 +130,17 @@ GMM_STATUS GmmLib::GmmXe2_LPGCachePolicy::InitCachePolicy()
             if ((UsagePATElement.Xe2.L4CC == GMM_GFX_PHY_L4_MT_WT) && (UsagePATElement.Xe2.L3CC == GMM_GFX_PHY_L3_MT_WB_XD))
             {
 
-                PATIdx = 8;
+                // With L3:XD, L4:WT, NC combination
+                if (pGmmLibContext->GetSkuTable().FtrDiscrete)
+                {
+                    // On BMG, L4 is a pass through, demote L4 to UC, keep L3 at XD
+                    PATIdx = PAT6;
+                }
+                else
+                {
+                    // On LNL, L3:XD is not needed
+                    PATIdx = PAT13;
+                }
             }
             else
             {

Original file line number	Diff line number	Diff line change
`@@ -130,7 +130,17 @@ GMM_STATUS GmmLib::GmmXe2_LPGCachePolicy::InitCachePolicy()`
`130`	`130`	`if ((UsagePATElement.Xe2.L4CC == GMM_GFX_PHY_L4_MT_WT) && (UsagePATElement.Xe2.L3CC == GMM_GFX_PHY_L3_MT_WB_XD))`
`131`	`131`	`{`
`132`	`132`
`133`		`- PATIdx = 8;`
	`133`	`+ // With L3:XD, L4:WT, NC combination`
	`134`	`+ if (pGmmLibContext->GetSkuTable().FtrDiscrete)`
	`135`	`+ {`
	`136`	`+ // On BMG, L4 is a pass through, demote L4 to UC, keep L3 at XD`
	`137`	`+ PATIdx = PAT6;`
	`138`	`+ }`
	`139`	`+ else`
	`140`	`+ {`
	`141`	`+ // On LNL, L3:XD is not needed`
	`142`	`+ PATIdx = PAT13;`
	`143`	`+ }`
`134`	`144`	`}`
`135`	`145`	`else`
`136`	`146`	`{`