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IntelSiliconPkg/IntelVTdDxe: Improve performance.

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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>
(cherry picked from commit 4ad5f59715)
This commit is contained in:
Jiewen Yao
2017-08-09 15:53:43 +08:00
committed by Star Zeng
parent 0444b43b3b
commit 6a80fbf6ff
7 changed files with 225 additions and 252 deletions
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2
IntelSiliconPkg/IntelVTdDxe/TranslationTableEx.c
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@@ -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;