sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

IntelSiliconPkg/IntelVTdDxe: Improve performance.

Browse Source 
This patch is to improve IOMMU performance.
All WBINVD is removed due to performance issue.
CLFLUSH by WriteBackDataCacheRange() is used to
only flush the context table or
second level page table if they are changed.

This patch also removed some unused functions.

Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
This commit is contained in:
Jiewen Yao
2017-08-09 15:53:43 +08:00
parent 3ccf5a8a41
commit 4ad5f59715
7 changed files with 225 additions and 252 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
IntelSiliconPkg/IntelVTdDxe/TranslationTableEx.c
View File

@@ -73,6 +73,7 @@ CreateExtContextEntry (
ExtRootEntry->Bits.UpperContextTablePointerLo = (UINT32) RShiftU64 ((UINT64)(UINTN)Buffer, 12) + 1;
ExtRootEntry->Bits.UpperContextTablePointerHi = (UINT32) RShiftU64 (RShiftU64 ((UINT64)(UINTN)Buffer, 12) + 1, 20);
ExtRootEntry->Bits.UpperPresent = 1;
FlushPageTableMemory (VtdIndex, (UINTN)ExtRootEntry, sizeof(*ExtRootEntry));
Buffer = (UINT8 *)Buffer + EFI_PAGES_TO_SIZE (ContextPages);
}
@@ -92,6 +93,7 @@ CreateExtContextEntry (
ExtContextEntry->Bits.AddressWidth = 0x2;
break;
}
FlushPageTableMemory (VtdIndex, (UINTN)ExtContextEntry, sizeof(*ExtContextEntry));
}
return EFI_SUCCESS;