[edk2] [PATCH] IntelSiliconPkg IntelVTdDxe: Use TPL to protect list/engine operation

Star Zeng posted 1 patch 6 years, 2 months ago
Failed in applying to current master (apply log)
IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c    | 19 ++++++-------
.../Feature/VTd/IntelVTdDxe/DmaProtection.c        |  8 +++---
.../Feature/VTd/IntelVTdDxe/DmaProtection.h        |  2 ++
.../Feature/VTd/IntelVTdDxe/IntelVTdDxe.c          | 32 +++++++++-------------
4 files changed, 28 insertions(+), 33 deletions(-)
[edk2] [PATCH] IntelSiliconPkg IntelVTdDxe: Use TPL to protect list/engine operation
Posted by Star Zeng 6 years, 2 months ago
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
---
 IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c    | 19 ++++++-------
 .../Feature/VTd/IntelVTdDxe/DmaProtection.c        |  8 +++---
 .../Feature/VTd/IntelVTdDxe/DmaProtection.h        |  2 ++
 .../Feature/VTd/IntelVTdDxe/IntelVTdDxe.c          | 32 +++++++++-------------
 4 files changed, 28 insertions(+), 33 deletions(-)

diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c
index e8685666e79a..57e086a64dbc 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 648f64c20b77..013823cc161f 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,
@@ -505,7 +505,7 @@ InitializeDmaProtection (
 
   Status = gBS->CreateEventEx (
                   EVT_NOTIFY_SIGNAL,
-                  TPL_CALLBACK,
+                  VTD_TPL_LEVEL,
                   OnExitBootServices,
                   NULL,
                   &gEfiEventExitBootServicesGuid,
@@ -514,7 +514,7 @@ InitializeDmaProtection (
   ASSERT_EFI_ERROR (Status);
 
   Status = EfiCreateEventLegacyBootEx (
-             TPL_CALLBACK,
+             VTD_TPL_LEVEL,
              OnLegacyBoot,
              NULL,
              &LegacyBootEvent
diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h
index 519a5ab00450..bc14ff9a6631 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 89d9bea3fc0f..570b47cf7364 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;
 }
-- 
2.7.0.windows.1

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Re: [edk2] [PATCH] IntelSiliconPkg IntelVTdDxe: Use TPL to protect list/engine operation
Posted by Yao, Jiewen 6 years, 2 months ago
It is good to have lock for linked list management.

However, I do not think we should update TPM for ExitBootServices/LegacyBoot.

I purposely use TPL_CALLBACK to make sure VTd is tear down later, so that other driver can stop DMA before that.

Thank you
Yao Jiewen

> -----Original Message-----
> From: Zeng, Star
> Sent: Thursday, January 4, 2018 11:32 AM
> To: edk2-devel@lists.01.org
> Cc: Zeng, Star <star.zeng@intel.com>; Yao, Jiewen <jiewen.yao@intel.com>
> Subject: [PATCH] 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>
> ---
>  IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c    | 19 ++++++-------
>  .../Feature/VTd/IntelVTdDxe/DmaProtection.c        |  8 +++---
>  .../Feature/VTd/IntelVTdDxe/DmaProtection.h        |  2 ++
>  .../Feature/VTd/IntelVTdDxe/IntelVTdDxe.c          | 32
> +++++++++-------------
>  4 files changed, 28 insertions(+), 33 deletions(-)
> 
> diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c
> b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c
> index e8685666e79a..57e086a64dbc 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 648f64c20b77..013823cc161f 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,
> @@ -505,7 +505,7 @@ InitializeDmaProtection (
> 
>    Status = gBS->CreateEventEx (
>                    EVT_NOTIFY_SIGNAL,
> -                  TPL_CALLBACK,
> +                  VTD_TPL_LEVEL,
>                    OnExitBootServices,
>                    NULL,
>                    &gEfiEventExitBootServicesGuid,
> @@ -514,7 +514,7 @@ InitializeDmaProtection (
>    ASSERT_EFI_ERROR (Status);
> 
>    Status = EfiCreateEventLegacyBootEx (
> -             TPL_CALLBACK,
> +             VTD_TPL_LEVEL,
>               OnLegacyBoot,
>               NULL,
>               &LegacyBootEvent
> diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h
> b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h
> index 519a5ab00450..bc14ff9a6631 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 89d9bea3fc0f..570b47cf7364 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;
>  }
> --
> 2.7.0.windows.1

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Re: [edk2] [PATCH] IntelSiliconPkg IntelVTdDxe: Use TPL to protect list/engine operation
Posted by Yao, Jiewen 6 years, 2 months ago
Correct typo.

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Yao,
> Jiewen
> Sent: Thursday, January 4, 2018 2:14 PM
> To: Zeng, Star <star.zeng@intel.com>; edk2-devel@lists.01.org
> Subject: Re: [edk2] [PATCH] IntelSiliconPkg IntelVTdDxe: Use TPL to protect
> list/engine operation
> 
> It is good to have lock for linked list management.
> 
> However, I do not think we should update TPL for ExitBootServices/LegacyBoot.
> 
> I purposely use TPL_CALLBACK to make sure VTd is tear down later, so that other
> driver can stop DMA before that.
> 
> Thank you
> Yao Jiewen
> 
> > -----Original Message-----
> > From: Zeng, Star
> > Sent: Thursday, January 4, 2018 11:32 AM
> > To: edk2-devel@lists.01.org
> > Cc: Zeng, Star <star.zeng@intel.com>; Yao, Jiewen <jiewen.yao@intel.com>
> > Subject: [PATCH] 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>
> > ---
> >  IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c    | 19 ++++++-------
> >  .../Feature/VTd/IntelVTdDxe/DmaProtection.c        |  8 +++---
> >  .../Feature/VTd/IntelVTdDxe/DmaProtection.h        |  2 ++
> >  .../Feature/VTd/IntelVTdDxe/IntelVTdDxe.c          | 32
> > +++++++++-------------
> >  4 files changed, 28 insertions(+), 33 deletions(-)
> >
> > diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c
> > b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c
> > index e8685666e79a..57e086a64dbc 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 648f64c20b77..013823cc161f 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,
> > @@ -505,7 +505,7 @@ InitializeDmaProtection (
> >
> >    Status = gBS->CreateEventEx (
> >                    EVT_NOTIFY_SIGNAL,
> > -                  TPL_CALLBACK,
> > +                  VTD_TPL_LEVEL,
> >                    OnExitBootServices,
> >                    NULL,
> >                    &gEfiEventExitBootServicesGuid,
> > @@ -514,7 +514,7 @@ InitializeDmaProtection (
> >    ASSERT_EFI_ERROR (Status);
> >
> >    Status = EfiCreateEventLegacyBootEx (
> > -             TPL_CALLBACK,
> > +             VTD_TPL_LEVEL,
> >               OnLegacyBoot,
> >               NULL,
> >               &LegacyBootEvent
> > diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h
> > b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h
> > index 519a5ab00450..bc14ff9a6631 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 89d9bea3fc0f..570b47cf7364 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;
> >  }
> > --
> > 2.7.0.windows.1
> 
> _______________________________________________
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> edk2-devel@lists.01.org
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Re: [edk2] [PATCH] IntelSiliconPkg IntelVTdDxe: Use TPL to protect list/engine operation
Posted by Zeng, Star 6 years, 2 months ago
Got it and agree.

I will keep TPL_CALLBACK for ExitBootServices/LegacyBoot.


Thanks,
Star
-----Original Message-----
From: Yao, Jiewen 
Sent: Thursday, January 4, 2018 2:17 PM
To: Yao, Jiewen <jiewen.yao@intel.com>; Zeng, Star <star.zeng@intel.com>; edk2-devel@lists.01.org
Subject: RE: [PATCH] IntelSiliconPkg IntelVTdDxe: Use TPL to protect list/engine operation

Correct typo.

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of 
> Yao, Jiewen
> Sent: Thursday, January 4, 2018 2:14 PM
> To: Zeng, Star <star.zeng@intel.com>; edk2-devel@lists.01.org
> Subject: Re: [edk2] [PATCH] IntelSiliconPkg IntelVTdDxe: Use TPL to 
> protect list/engine operation
> 
> It is good to have lock for linked list management.
> 
> However, I do not think we should update TPL for ExitBootServices/LegacyBoot.
> 
> I purposely use TPL_CALLBACK to make sure VTd is tear down later, so 
> that other driver can stop DMA before that.
> 
> Thank you
> Yao Jiewen
> 
> > -----Original Message-----
> > From: Zeng, Star
> > Sent: Thursday, January 4, 2018 11:32 AM
> > To: edk2-devel@lists.01.org
> > Cc: Zeng, Star <star.zeng@intel.com>; Yao, Jiewen 
> > <jiewen.yao@intel.com>
> > Subject: [PATCH] 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>
> > ---
> >  IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c    | 19 ++++++-------
> >  .../Feature/VTd/IntelVTdDxe/DmaProtection.c        |  8 +++---
> >  .../Feature/VTd/IntelVTdDxe/DmaProtection.h        |  2 ++
> >  .../Feature/VTd/IntelVTdDxe/IntelVTdDxe.c          | 32
> > +++++++++-------------
> >  4 files changed, 28 insertions(+), 33 deletions(-)
> >
> > diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c
> > b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c
> > index e8685666e79a..57e086a64dbc 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 648f64c20b77..013823cc161f 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, @@ -505,7 +505,7 @@ 
> > InitializeDmaProtection (
> >
> >    Status = gBS->CreateEventEx (
> >                    EVT_NOTIFY_SIGNAL,
> > -                  TPL_CALLBACK,
> > +                  VTD_TPL_LEVEL,
> >                    OnExitBootServices,
> >                    NULL,
> >                    &gEfiEventExitBootServicesGuid, @@ -514,7 +514,7 
> > @@ InitializeDmaProtection (
> >    ASSERT_EFI_ERROR (Status);
> >
> >    Status = EfiCreateEventLegacyBootEx (
> > -             TPL_CALLBACK,
> > +             VTD_TPL_LEVEL,
> >               OnLegacyBoot,
> >               NULL,
> >               &LegacyBootEvent
> > diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h
> > b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.h
> > index 519a5ab00450..bc14ff9a6631 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 89d9bea3fc0f..570b47cf7364 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;
> >  }
> > --
> > 2.7.0.windows.1
> 
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