diff options
Diffstat (limited to 'IntelSiliconPkg/Feature/VTd/IntelVTdDxe/IntelVTdDxe.c')
| -rw-r--r-- | IntelSiliconPkg/Feature/VTd/IntelVTdDxe/IntelVTdDxe.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/IntelVTdDxe.c b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/IntelVTdDxe.c index 570b47cf73..841a5a9264 100644 --- a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/IntelVTdDxe.c +++ b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/IntelVTdDxe.c @@ -1,7 +1,7 @@ /** @file
Intel VTd driver.
- Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -231,6 +231,14 @@ VTdSetAttribute ( DEBUG ((DEBUG_VERBOSE, "PCI(S%x.B%x.D%x.F%x) ", Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function));
DEBUG ((DEBUG_VERBOSE, "(0x%lx~0x%lx) - %lx\n", DeviceAddress, Length, IoMmuAccess));
+ if (mAcpiDmarTable == NULL) {
+ //
+ // Record the entry to driver global variable.
+ // As such once VTd is activated, the setting can be adopted.
+ //
+ return RequestAccessAttribute (Segment, SourceId, DeviceAddress, Length, IoMmuAccess);
+ }
+
PERF_CODE (
AsciiSPrint (PerfToken, sizeof(PerfToken), "S%04xB%02xD%02xF%01x", Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function);
Identifier = (Segment << 16) | SourceId.Uint16;
|