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

IntelSiliconPkg IntelVTdDxe: Fix DMA does not work issue

Browse Source 
Fix DMA does not work issue when system memory is not
greater than 4G.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
(cherry picked from commit 1d4c17a6ef)
This commit is contained in:
Star Zeng
2018-01-17 19:33:30 +08:00
parent 8bb7fa235f
commit 0f6641efed
1 changed files with 7 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
IntelSiliconPkg/Feature/VTd/IntelVTdDxe/TranslationTable.c
View File

@@ -286,9 +286,13 @@ CreateSecondLevelPagingEntry (
if (SecondLevelPagingEntry == NULL) { if (SecondLevelPagingEntry == NULL) {
return NULL; return NULL;
} }
SecondLevelPagingEntry = CreateSecondLevelPagingEntryTable (VtdIndex, SecondLevelPagingEntry, SIZE_4GB, mAbove4GMemoryLimit, IoMmuAccess);
if (SecondLevelPagingEntry == NULL) { if (mAbove4GMemoryLimit != 0) {
return NULL; ASSERT (mAbove4GMemoryLimit > BASE_4GB);
SecondLevelPagingEntry = CreateSecondLevelPagingEntryTable (VtdIndex, SecondLevelPagingEntry, SIZE_4GB, mAbove4GMemoryLimit, IoMmuAccess);
if (SecondLevelPagingEntry == NULL) {
return NULL;
}
} }
return SecondLevelPagingEntry; return SecondLevelPagingEntry;