IntelSiliconPkg IntelVTdDxe: Use TPL to protect list/engine operation

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>

4 files changed, 26 insertions, 31 deletions

diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c
index e868566..57e086a 100644
--- a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c
+++ b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c
@@ -1,7 +1,7 @@
 /** @file

   BmDma related function

 

-  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

@@ -12,15 +12,7 @@
 

 **/

 

-#include <PiDxe.h>

-

-#include <Protocol/IoMmu.h>

-

-#include <Library/BaseLib.h>

-#include <Library/DebugLib.h>

-#include <Library/BaseMemoryLib.h>

-#include <Library/MemoryAllocationLib.h>

-#include <Library/UefiBootServicesTableLib.h>

+#include "DmaProtection.h"

 

 // TBD: May make it a policy

 #define DMA_MEMORY_TOP          MAX_UINTN

@@ -76,6 +68,7 @@ IoMmuMap (
   MAP_INFO                                          *MapInfo;

   EFI_PHYSICAL_ADDRESS                              DmaMemoryTop;

   BOOLEAN                                           NeedRemap;

+  EFI_TPL                                           OriginalTpl;

 

   if (NumberOfBytes == NULL || DeviceAddress == NULL ||

       Mapping == NULL) {

@@ -198,7 +191,9 @@ IoMmuMap (
     MapInfo->DeviceAddress = MapInfo->HostAddress;

   }

 

+  OriginalTpl = gBS->RaiseTPL (VTD_TPL_LEVEL);

   InsertTailList (&gMaps, &MapInfo->Link);

+  gBS->RestoreTPL (OriginalTpl);

 

   //

   // The DeviceAddress is the address of the maped buffer below 4GB

@@ -233,6 +228,7 @@ IoMmuUnmap (
 {

   MAP_INFO                 *MapInfo;

   LIST_ENTRY               *Link;

+  EFI_TPL                  OriginalTpl;

 

   DEBUG ((DEBUG_VERBOSE, "IoMmuUnmap: 0x%08x\n", Mapping));

 

@@ -241,6 +237,7 @@ IoMmuUnmap (
     return EFI_INVALID_PARAMETER;

   }

 

+  OriginalTpl = gBS->RaiseTPL (VTD_TPL_LEVEL);

   MapInfo = NULL;

   for (Link = GetFirstNode (&gMaps)

        ; !IsNull (&gMaps, Link)

@@ -255,10 +252,12 @@ IoMmuUnmap (
   // Mapping is not a valid value returned by Map()

   //

   if (MapInfo != Mapping) {

+    gBS->RestoreTPL (OriginalTpl);

     DEBUG ((DEBUG_ERROR, "IoMmuUnmap: %r\n", EFI_INVALID_PARAMETER));

     return EFI_INVALID_PARAMETER;

   }

   RemoveEntryList (&MapInfo->Link);

+  gBS->RestoreTPL (OriginalTpl);

 

   if (MapInfo->DeviceAddress != MapInfo->HostAddress) {

     //

diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.c b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.c
index 648f64c..d9b8885 100644
--- a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.c
+++ b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.c
@@ -478,7 +478,7 @@ InitializeDmaProtection (
   

   Status = gBS->CreateEventEx (

                   EVT_NOTIFY_SIGNAL,

-                  TPL_CALLBACK,

+                  VTD_TPL_LEVEL,

                   AcpiNotificationFunc,

                   NULL,

                   &gEfiAcpi10TableGuid,

@@ -488,7 +488,7 @@ InitializeDmaProtection (
 

   Status = gBS->CreateEventEx (

                   EVT_NOTIFY_SIGNAL,

-                  TPL_CALLBACK,

+                  VTD_TPL_LEVEL,

                   AcpiNotificationFunc,

                   NULL,

                   &gEfiAcpi20TableGuid,

diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h
index 519a5ab..bc14ff9 100644
--- a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h
+++ b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h
@@ -48,6 +48,8 @@
 #define ALIGN_VALUE_UP(Value, Alignment)  (((Value) + (Alignment) - 1) & (~((Alignment) - 1)))

 #define ALIGN_VALUE_LOW(Value, Alignment) ((Value) & (~((Alignment) - 1)))

 

+#define VTD_TPL_LEVEL TPL_NOTIFY

+

 //

 // This is the initial max PCI DATA number.

 // The number may be enlarged later.

diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/IntelVTdDxe.c b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/IntelVTdDxe.c
index 89d9bea..570b47c 100644
--- a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/IntelVTdDxe.c
+++ b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/IntelVTdDxe.c
@@ -12,16 +12,6 @@
 

 **/

 

-#include <PiDxe.h>

-

-#include <Protocol/IoMmu.h>

-#include <Protocol/PciIo.h>

-

-#include <Library/IoLib.h>

-#include <Library/BaseLib.h>

-#include <Library/DebugLib.h>

-#include <Library/UefiBootServicesTableLib.h>

-

 #include "DmaProtection.h"

 

 /**

@@ -306,18 +296,22 @@ IoMmuSetAttribute (
   EFI_STATUS            Status;

   EFI_PHYSICAL_ADDRESS  DeviceAddress;

   UINTN                 NumberOfPages;

+  EFI_TPL               OriginalTpl;

+

+  OriginalTpl = gBS->RaiseTPL (VTD_TPL_LEVEL);

 

   Status = GetDeviceInfoFromMapping (Mapping, &DeviceAddress, &NumberOfPages);

-  if (EFI_ERROR(Status)) {

-    return Status;

+  if (!EFI_ERROR(Status)) {

+    Status = VTdSetAttribute (

+               This,

+               DeviceHandle,

+               DeviceAddress,

+               EFI_PAGES_TO_SIZE(NumberOfPages),

+               IoMmuAccess

+               );

   }

-  Status = VTdSetAttribute (

-             This,

-             DeviceHandle,

-             DeviceAddress,

-             EFI_PAGES_TO_SIZE(NumberOfPages),

-             IoMmuAccess

-             );

+

+  gBS->RestoreTPL (OriginalTpl);

 

   return Status;

 }