OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c | 148 ++++++++++++++++++++++++++++++++++ OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf | 44 ++++++++++ OvmfPkg/OvmfPkgIa32X64.dsc | 2 + OvmfPkg/OvmfPkgIa32X64.fdf | 3 + 4 files changed, 197 insertions(+) create mode 100644 OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c create mode 100644 OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
On entry, GcdNotifyDxe scans the GCD MemmorySpace map and produces this
protocol to get notifications from GCD on MemorySpace Add/Remove operations.
This patch illustrates how OvmfPkg could take actions on GCD notifications.
For example: updating the SEV mask on page-table entries for MMIO ranges.
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Brijesh Singh <brijesh.ksingh@gmail.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Leo Duran <leo.duran@amd.com>
---
OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c | 148 ++++++++++++++++++++++++++++++++++
OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf | 44 ++++++++++
OvmfPkg/OvmfPkgIa32X64.dsc | 2 +
OvmfPkg/OvmfPkgIa32X64.fdf | 3 +
4 files changed, 197 insertions(+)
create mode 100644 OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c
create mode 100644 OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
diff --git a/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c
new file mode 100644
index 0000000..1b54584
--- /dev/null
+++ b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c
@@ -0,0 +1,148 @@
+/** @file
+
+ GCD Memory Space Map notification protocol handler.
+
+ Copyright (c) 2017, AMD Inc. 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
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <PiDxe.h>
+
+#include <Library/BaseLib.h>
+#include <Library/UefiLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/DxeServicesTableLib.h>
+#include <Library/DebugLib.h>
+
+#include <Protocol/GcdMemorySpaceNotify.h>
+
+//
+// GCD Memory Space Map notification protocol
+//
+STATIC EFI_GCD_MEMORY_SPACE_NOTIFY_PROTOCOL mGcdMemorySpaceNotifyProtocol;
+
+///
+/// Lookup table used to print GCD Memory Space Map
+///
+GLOBAL_REMOVE_IF_UNREFERENCED CONST CHAR8 *mGcdMemoryTypeNames[] = {
+ "EfiGcdMemoryTypeNonExistent",
+ "EfiGcdMemoryTypeReserved",
+ "EfiGcdMemoryTypeSystemMemory",
+ "EfiGcdMemoryTypeMemoryMappedIo",
+ "EfiGcdMemoryTypePersistentMemory",
+ "EfiGcdMemoryTypeMoreReliable",
+ "EfiGcdMemoryTypeMaximum"
+};
+
+
+/**
+Notify on: Add a segment of memory to GCD map.
+
+@param GcdMemoryType Memory type of the segment.
+@param BaseAddress Base address of the segment.
+@param Length Length of the segment.
+@param Capabilities Alterable attributes of the segment.
+
+**/
+STATIC
+VOID
+EFIAPI
+GcdMemorySpaceAddNotify (
+IN EFI_GCD_MEMORY_TYPE GcdMemoryType,
+IN EFI_PHYSICAL_ADDRESS BaseAddress,
+IN UINT64 Length,
+IN UINT64 Capabilities
+)
+{
+ DEBUG ((EFI_D_INFO, "%a()\n", __FUNCTION__));
+
+ if (GcdMemoryType >= EfiGcdMemoryTypeNonExistent && GcdMemoryType <= EfiGcdMemoryTypeMaximum) {
+ DEBUG ((EFI_D_INFO, " GcdMemoryType = 0x%X (%a)\n", GcdMemoryType, mGcdMemoryTypeNames[GcdMemoryType]));
+ DEBUG ((EFI_D_INFO, " BaseAddress = 0x%p\n", BaseAddress));
+ DEBUG ((EFI_D_INFO, " Length = 0x%lX\n", Length));
+
+ if (GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo) {
+ DEBUG ((EFI_D_INFO, " MMIO: Start = 0x%p, Length = 0x%lX\n", BaseAddress, Length));
+ }
+ }
+ else {
+ DEBUG ((EFI_D_INFO, " Invalid GcdMemoryType = 0x%X\n", GcdMemoryType));
+ }
+}
+
+
+/**
+Notify on: Remove a segment of memory to GCD map.
+
+@param BaseAddress Base address of the segment.
+@param Length Length of the segment.
+
+**/
+STATIC
+VOID
+EFIAPI
+GcdMemorySpaceRemoveNotify (
+IN EFI_PHYSICAL_ADDRESS BaseAddress,
+IN UINT64 Length
+)
+{
+ DEBUG ((EFI_D_INFO, "%a()\n", __FUNCTION__));
+ DEBUG ((EFI_D_INFO, " BaseAddress = 0x%p\n", BaseAddress));
+ DEBUG ((EFI_D_INFO, " Length = 0x%lX\n", Length));
+}
+
+
+EFI_STATUS
+EFIAPI
+GcdNotifyDxeEntry (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap;
+ UINTN NumEntries;
+ UINTN Index;
+ EFI_STATUS Status;
+ EFI_HANDLE Handle;
+
+ DEBUG((EFI_D_INFO, "%a - ENTRY\n", __FUNCTION__));
+
+ //
+ // Iterate through the current MemorySpace Map
+ //
+ MemorySpaceMap = NULL;
+ Status = gDS->GetMemorySpaceMap (&NumEntries, &MemorySpaceMap);
+ ASSERT_EFI_ERROR (Status);
+
+ for (Index = 0; Index < NumEntries; ++Index) {
+ if (MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo) {
+ DEBUG ((DEBUG_INFO, " MMIO: Start = 0x%p, Length = 0x%lX\n",
+ MemorySpaceMap[Index].BaseAddress, MemorySpaceMap[Index].Length));
+ }
+ }
+
+ //
+ // Install GCD Memory Space Map notification protocol
+ //
+ mGcdMemorySpaceNotifyProtocol.MemorySpaceAddNotify = GcdMemorySpaceAddNotify;
+ mGcdMemorySpaceNotifyProtocol.MemorySpaceRemoveNotify = GcdMemorySpaceRemoveNotify;
+ Handle = NULL;
+ Status = gBS->InstallProtocolInterface (
+ &Handle,
+ &gEfiGcdMemorySpaceNotifyProtocolGuid,
+ EFI_NATIVE_INTERFACE,
+ &mGcdMemorySpaceNotifyProtocol);
+ ASSERT_EFI_ERROR (Status);
+
+ DEBUG((EFI_D_INFO, "%a - EXIT (Status = %r)\n", __FUNCTION__, Status));
+ return Status;
+}
diff --git a/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
new file mode 100644
index 0000000..a4c8445
--- /dev/null
+++ b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
@@ -0,0 +1,44 @@
+#/** @file
+#
+# Component description file for GcdNotifyDxe module
+#
+# Copyright (c) 2017, AMD Inc. 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
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#**/
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = GcdNotifyDxe
+ FILE_GUID = 2ec9da37-ee35-4de9-86c5-6d9a81dc38a7
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ ENTRY_POINT = GcdNotifyDxeEntry
+
+[Sources]
+ GcdNotifyDxe.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+
+[LibraryClasses]
+ BaseLib
+ UefiLib
+ UefiDriverEntryPoint
+ UefiBootServicesTableLib
+ DxeServicesTableLib
+ DebugLib
+
+[Protocols]
+ gEfiGcdMemorySpaceNotifyProtocolGuid ## PRODUCES
+
+[Depex]
+ TRUE
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
index 71ac62f..441d7cc 100644
--- a/OvmfPkg/OvmfPkgIa32X64.dsc
+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -3,6 +3,7 @@
#
# Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
# (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
+# Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
@@ -798,6 +799,7 @@
!endif
OvmfPkg/PlatformDxe/Platform.inf
+ OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
!if $(SMM_REQUIRE) == TRUE
OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
diff --git a/OvmfPkg/OvmfPkgIa32X64.fdf b/OvmfPkg/OvmfPkgIa32X64.fdf
index 5233314..71b118a 100644
--- a/OvmfPkg/OvmfPkgIa32X64.fdf
+++ b/OvmfPkg/OvmfPkgIa32X64.fdf
@@ -3,6 +3,7 @@
#
# Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
# (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
+# Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
@@ -193,6 +194,7 @@ APRIORI DXE {
!if $(SMM_REQUIRE) == FALSE
INF OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbServicesRuntimeDxe.inf
!endif
+ INF OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
}
#
@@ -351,6 +353,7 @@ INF RuleOverride=CSM OvmfPkg/Csm/Csm16/Csm16.inf
INF OvmfPkg/QemuVideoDxe/QemuVideoDxe.inf
INF OvmfPkg/VirtioGpuDxe/VirtioGpu.inf
INF OvmfPkg/PlatformDxe/Platform.inf
+INF OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
!if $(SMM_REQUIRE) == TRUE
INF OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
--
2.7.4
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
On 04/12/17 21:00, Leo Duran wrote:
> On entry, GcdNotifyDxe scans the GCD MemmorySpace map and produces this
> protocol to get notifications from GCD on MemorySpace Add/Remove operations.
>
> This patch illustrates how OvmfPkg could take actions on GCD notifications.
> For example: updating the SEV mask on page-table entries for MMIO ranges.
>
> Cc: Laszlo Ersek <lersek@redhat.com>
> Cc: Feng Tian <feng.tian@intel.com>
> Cc: Star Zeng <star.zeng@intel.com>
> Cc: Brijesh Singh <brijesh.ksingh@gmail.com>
> Contributed-under: TianoCore Contribution Agreement 1.0
> Signed-off-by: Leo Duran <leo.duran@amd.com>
> ---
> OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c | 148 ++++++++++++++++++++++++++++++++++
> OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf | 44 ++++++++++
> OvmfPkg/OvmfPkgIa32X64.dsc | 2 +
> OvmfPkg/OvmfPkgIa32X64.fdf | 3 +
> 4 files changed, 197 insertions(+)
> create mode 100644 OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c
> create mode 100644 OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
I guess this patch depends on
[PATCH] MdeModulePkg: Add EFI_GCD_MEMORY_SPACE_NOTIFY_PROTOCOL
so I think we should first await the outcome of that discussion.
Still, is there any particular reason to include the driver in the
OvmfPkgIa32X64 platform only? (No Ia32, no X64?)
Thanks
Laszlo
>
> diff --git a/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c
> new file mode 100644
> index 0000000..1b54584
> --- /dev/null
> +++ b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c
> @@ -0,0 +1,148 @@
> +/** @file
> +
> + GCD Memory Space Map notification protocol handler.
> +
> + Copyright (c) 2017, AMD Inc. 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
> + http://opensource.org/licenses/bsd-license.php
> +
> + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
> +
> +**/
> +
> +#include <PiDxe.h>
> +
> +#include <Library/BaseLib.h>
> +#include <Library/UefiLib.h>
> +#include <Library/UefiDriverEntryPoint.h>
> +#include <Library/UefiBootServicesTableLib.h>
> +#include <Library/DxeServicesTableLib.h>
> +#include <Library/DebugLib.h>
> +
> +#include <Protocol/GcdMemorySpaceNotify.h>
> +
> +//
> +// GCD Memory Space Map notification protocol
> +//
> +STATIC EFI_GCD_MEMORY_SPACE_NOTIFY_PROTOCOL mGcdMemorySpaceNotifyProtocol;
> +
> +///
> +/// Lookup table used to print GCD Memory Space Map
> +///
> +GLOBAL_REMOVE_IF_UNREFERENCED CONST CHAR8 *mGcdMemoryTypeNames[] = {
> + "EfiGcdMemoryTypeNonExistent",
> + "EfiGcdMemoryTypeReserved",
> + "EfiGcdMemoryTypeSystemMemory",
> + "EfiGcdMemoryTypeMemoryMappedIo",
> + "EfiGcdMemoryTypePersistentMemory",
> + "EfiGcdMemoryTypeMoreReliable",
> + "EfiGcdMemoryTypeMaximum"
> +};
> +
> +
> +/**
> +Notify on: Add a segment of memory to GCD map.
> +
> +@param GcdMemoryType Memory type of the segment.
> +@param BaseAddress Base address of the segment.
> +@param Length Length of the segment.
> +@param Capabilities Alterable attributes of the segment.
> +
> +**/
> +STATIC
> +VOID
> +EFIAPI
> +GcdMemorySpaceAddNotify (
> +IN EFI_GCD_MEMORY_TYPE GcdMemoryType,
> +IN EFI_PHYSICAL_ADDRESS BaseAddress,
> +IN UINT64 Length,
> +IN UINT64 Capabilities
> +)
> +{
> + DEBUG ((EFI_D_INFO, "%a()\n", __FUNCTION__));
> +
> + if (GcdMemoryType >= EfiGcdMemoryTypeNonExistent && GcdMemoryType <= EfiGcdMemoryTypeMaximum) {
> + DEBUG ((EFI_D_INFO, " GcdMemoryType = 0x%X (%a)\n", GcdMemoryType, mGcdMemoryTypeNames[GcdMemoryType]));
> + DEBUG ((EFI_D_INFO, " BaseAddress = 0x%p\n", BaseAddress));
> + DEBUG ((EFI_D_INFO, " Length = 0x%lX\n", Length));
> +
> + if (GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo) {
> + DEBUG ((EFI_D_INFO, " MMIO: Start = 0x%p, Length = 0x%lX\n", BaseAddress, Length));
> + }
> + }
> + else {
> + DEBUG ((EFI_D_INFO, " Invalid GcdMemoryType = 0x%X\n", GcdMemoryType));
> + }
> +}
> +
> +
> +/**
> +Notify on: Remove a segment of memory to GCD map.
> +
> +@param BaseAddress Base address of the segment.
> +@param Length Length of the segment.
> +
> +**/
> +STATIC
> +VOID
> +EFIAPI
> +GcdMemorySpaceRemoveNotify (
> +IN EFI_PHYSICAL_ADDRESS BaseAddress,
> +IN UINT64 Length
> +)
> +{
> + DEBUG ((EFI_D_INFO, "%a()\n", __FUNCTION__));
> + DEBUG ((EFI_D_INFO, " BaseAddress = 0x%p\n", BaseAddress));
> + DEBUG ((EFI_D_INFO, " Length = 0x%lX\n", Length));
> +}
> +
> +
> +EFI_STATUS
> +EFIAPI
> +GcdNotifyDxeEntry (
> + IN EFI_HANDLE ImageHandle,
> + IN EFI_SYSTEM_TABLE *SystemTable
> + )
> +{
> + EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap;
> + UINTN NumEntries;
> + UINTN Index;
> + EFI_STATUS Status;
> + EFI_HANDLE Handle;
> +
> + DEBUG((EFI_D_INFO, "%a - ENTRY\n", __FUNCTION__));
> +
> + //
> + // Iterate through the current MemorySpace Map
> + //
> + MemorySpaceMap = NULL;
> + Status = gDS->GetMemorySpaceMap (&NumEntries, &MemorySpaceMap);
> + ASSERT_EFI_ERROR (Status);
> +
> + for (Index = 0; Index < NumEntries; ++Index) {
> + if (MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo) {
> + DEBUG ((DEBUG_INFO, " MMIO: Start = 0x%p, Length = 0x%lX\n",
> + MemorySpaceMap[Index].BaseAddress, MemorySpaceMap[Index].Length));
> + }
> + }
> +
> + //
> + // Install GCD Memory Space Map notification protocol
> + //
> + mGcdMemorySpaceNotifyProtocol.MemorySpaceAddNotify = GcdMemorySpaceAddNotify;
> + mGcdMemorySpaceNotifyProtocol.MemorySpaceRemoveNotify = GcdMemorySpaceRemoveNotify;
> + Handle = NULL;
> + Status = gBS->InstallProtocolInterface (
> + &Handle,
> + &gEfiGcdMemorySpaceNotifyProtocolGuid,
> + EFI_NATIVE_INTERFACE,
> + &mGcdMemorySpaceNotifyProtocol);
> + ASSERT_EFI_ERROR (Status);
> +
> + DEBUG((EFI_D_INFO, "%a - EXIT (Status = %r)\n", __FUNCTION__, Status));
> + return Status;
> +}
> diff --git a/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
> new file mode 100644
> index 0000000..a4c8445
> --- /dev/null
> +++ b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
> @@ -0,0 +1,44 @@
> +#/** @file
> +#
> +# Component description file for GcdNotifyDxe module
> +#
> +# Copyright (c) 2017, AMD Inc. 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
> +# http://opensource.org/licenses/bsd-license.php
> +#
> +# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> +# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
> +#
> +#**/
> +
> +[Defines]
> + INF_VERSION = 0x00010005
> + BASE_NAME = GcdNotifyDxe
> + FILE_GUID = 2ec9da37-ee35-4de9-86c5-6d9a81dc38a7
> + MODULE_TYPE = DXE_DRIVER
> + VERSION_STRING = 1.0
> + ENTRY_POINT = GcdNotifyDxeEntry
> +
> +[Sources]
> + GcdNotifyDxe.c
> +
> +[Packages]
> + MdePkg/MdePkg.dec
> + MdeModulePkg/MdeModulePkg.dec
> +
> +[LibraryClasses]
> + BaseLib
> + UefiLib
> + UefiDriverEntryPoint
> + UefiBootServicesTableLib
> + DxeServicesTableLib
> + DebugLib
> +
> +[Protocols]
> + gEfiGcdMemorySpaceNotifyProtocolGuid ## PRODUCES
> +
> +[Depex]
> + TRUE
> diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
> index 71ac62f..441d7cc 100644
> --- a/OvmfPkg/OvmfPkgIa32X64.dsc
> +++ b/OvmfPkg/OvmfPkgIa32X64.dsc
> @@ -3,6 +3,7 @@
> #
> # Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
> # (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
> +# Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
> #
> # This program and the accompanying materials
> # are licensed and made available under the terms and conditions of the BSD License
> @@ -798,6 +799,7 @@
> !endif
>
> OvmfPkg/PlatformDxe/Platform.inf
> + OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
>
> !if $(SMM_REQUIRE) == TRUE
> OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
> diff --git a/OvmfPkg/OvmfPkgIa32X64.fdf b/OvmfPkg/OvmfPkgIa32X64.fdf
> index 5233314..71b118a 100644
> --- a/OvmfPkg/OvmfPkgIa32X64.fdf
> +++ b/OvmfPkg/OvmfPkgIa32X64.fdf
> @@ -3,6 +3,7 @@
> #
> # Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
> # (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
> +# Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
> #
> # This program and the accompanying materials
> # are licensed and made available under the terms and conditions of the BSD License
> @@ -193,6 +194,7 @@ APRIORI DXE {
> !if $(SMM_REQUIRE) == FALSE
> INF OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbServicesRuntimeDxe.inf
> !endif
> + INF OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
> }
>
> #
> @@ -351,6 +353,7 @@ INF RuleOverride=CSM OvmfPkg/Csm/Csm16/Csm16.inf
> INF OvmfPkg/QemuVideoDxe/QemuVideoDxe.inf
> INF OvmfPkg/VirtioGpuDxe/VirtioGpu.inf
> INF OvmfPkg/PlatformDxe/Platform.inf
> +INF OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
>
> !if $(SMM_REQUIRE) == TRUE
> INF OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
>
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
Lazlo,
This path is *not* intended to be pushed upstream... It's just a "show & tell" for the previous patch.
Basically, the intent is to illustrate the use-case... so this patch just does a DEBUG out.
Leo.
> -----Original Message-----
> From: Laszlo Ersek [mailto:lersek@redhat.com]
> Sent: Wednesday, April 12, 2017 3:21 PM
> To: Duran, Leo <leo.duran@amd.com>; edk2-devel@ml01.01.org
> Cc: Feng Tian <feng.tian@intel.com>; Star Zeng <star.zeng@intel.com>;
> Brijesh Singh <brijesh.ksingh@gmail.com>
> Subject: Re: [PATCH] OvmfPkg/GcdNotifyDxe: Install
> EFI_GCD_MEMORY_SPACE_NOTIFY_PROTOCOL
>
> On 04/12/17 21:00, Leo Duran wrote:
> > On entry, GcdNotifyDxe scans the GCD MemmorySpace map and produces
> > this protocol to get notifications from GCD on MemorySpace Add/Remove
> operations.
> >
> > This patch illustrates how OvmfPkg could take actions on GCD notifications.
> > For example: updating the SEV mask on page-table entries for MMIO
> ranges.
> >
> > Cc: Laszlo Ersek <lersek@redhat.com>
> > Cc: Feng Tian <feng.tian@intel.com>
> > Cc: Star Zeng <star.zeng@intel.com>
> > Cc: Brijesh Singh <brijesh.ksingh@gmail.com>
> > Contributed-under: TianoCore Contribution Agreement 1.0
> > Signed-off-by: Leo Duran <leo.duran@amd.com>
> > ---
> > OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c | 148
> ++++++++++++++++++++++++++++++++++
> > OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf | 44 ++++++++++
> > OvmfPkg/OvmfPkgIa32X64.dsc | 2 +
> > OvmfPkg/OvmfPkgIa32X64.fdf | 3 +
> > 4 files changed, 197 insertions(+)
> > create mode 100644 OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c
> > create mode 100644 OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
>
> I guess this patch depends on
>
> [PATCH] MdeModulePkg: Add
> EFI_GCD_MEMORY_SPACE_NOTIFY_PROTOCOL
>
> so I think we should first await the outcome of that discussion.
>
> Still, is there any particular reason to include the driver in the
> OvmfPkgIa32X64 platform only? (No Ia32, no X64?)
>
> Thanks
> Laszlo
>
> >
> > diff --git a/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c
> > b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c
> > new file mode 100644
> > index 0000000..1b54584
> > --- /dev/null
> > +++ b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c
> > @@ -0,0 +1,148 @@
> > +/** @file
> > +
> > + GCD Memory Space Map notification protocol handler.
> > +
> > + Copyright (c) 2017, AMD Inc. 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 http://opensource.org/licenses/bsd-license.php
> > +
> > + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> > + BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND,
> EITHER EXPRESS OR IMPLIED.
> > +
> > +**/
> > +
> > +#include <PiDxe.h>
> > +
> > +#include <Library/BaseLib.h>
> > +#include <Library/UefiLib.h>
> > +#include <Library/UefiDriverEntryPoint.h> #include
> > +<Library/UefiBootServicesTableLib.h>
> > +#include <Library/DxeServicesTableLib.h> #include
> > +<Library/DebugLib.h>
> > +
> > +#include <Protocol/GcdMemorySpaceNotify.h>
> > +
> > +//
> > +// GCD Memory Space Map notification protocol // STATIC
> > +EFI_GCD_MEMORY_SPACE_NOTIFY_PROTOCOL
> mGcdMemorySpaceNotifyProtocol;
> > +
> > +///
> > +/// Lookup table used to print GCD Memory Space Map ///
> > +GLOBAL_REMOVE_IF_UNREFERENCED CONST CHAR8
> *mGcdMemoryTypeNames[] = {
> > + "EfiGcdMemoryTypeNonExistent",
> > + "EfiGcdMemoryTypeReserved",
> > + "EfiGcdMemoryTypeSystemMemory",
> > + "EfiGcdMemoryTypeMemoryMappedIo",
> > + "EfiGcdMemoryTypePersistentMemory",
> > + "EfiGcdMemoryTypeMoreReliable",
> > + "EfiGcdMemoryTypeMaximum"
> > +};
> > +
> > +
> > +/**
> > +Notify on: Add a segment of memory to GCD map.
> > +
> > +@param GcdMemoryType Memory type of the segment.
> > +@param BaseAddress Base address of the segment.
> > +@param Length Length of the segment.
> > +@param Capabilities Alterable attributes of the segment.
> > +
> > +**/
> > +STATIC
> > +VOID
> > +EFIAPI
> > +GcdMemorySpaceAddNotify (
> > +IN EFI_GCD_MEMORY_TYPE GcdMemoryType,
> > +IN EFI_PHYSICAL_ADDRESS BaseAddress,
> > +IN UINT64 Length,
> > +IN UINT64 Capabilities
> > +)
> > +{
> > + DEBUG ((EFI_D_INFO, "%a()\n", __FUNCTION__));
> > +
> > + if (GcdMemoryType >= EfiGcdMemoryTypeNonExistent &&
> GcdMemoryType <= EfiGcdMemoryTypeMaximum) {
> > + DEBUG ((EFI_D_INFO, " GcdMemoryType = 0x%X (%a)\n",
> GcdMemoryType, mGcdMemoryTypeNames[GcdMemoryType]));
> > + DEBUG ((EFI_D_INFO, " BaseAddress = 0x%p\n", BaseAddress));
> > + DEBUG ((EFI_D_INFO, " Length = 0x%lX\n", Length));
> > +
> > + if (GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo) {
> > + DEBUG ((EFI_D_INFO, " MMIO: Start = 0x%p, Length = 0x%lX\n",
> BaseAddress, Length));
> > + }
> > + }
> > + else {
> > + DEBUG ((EFI_D_INFO, " Invalid GcdMemoryType = 0x%X\n",
> > +GcdMemoryType));
> > + }
> > +}
> > +
> > +
> > +/**
> > +Notify on: Remove a segment of memory to GCD map.
> > +
> > +@param BaseAddress Base address of the segment.
> > +@param Length Length of the segment.
> > +
> > +**/
> > +STATIC
> > +VOID
> > +EFIAPI
> > +GcdMemorySpaceRemoveNotify (
> > +IN EFI_PHYSICAL_ADDRESS BaseAddress,
> > +IN UINT64 Length
> > +)
> > +{
> > + DEBUG ((EFI_D_INFO, "%a()\n", __FUNCTION__));
> > + DEBUG ((EFI_D_INFO, " BaseAddress = 0x%p\n", BaseAddress));
> > + DEBUG ((EFI_D_INFO, " Length = 0x%lX\n", Length)); }
> > +
> > +
> > +EFI_STATUS
> > +EFIAPI
> > +GcdNotifyDxeEntry (
> > + IN EFI_HANDLE ImageHandle,
> > + IN EFI_SYSTEM_TABLE *SystemTable
> > + )
> > +{
> > + EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap;
> > + UINTN NumEntries;
> > + UINTN Index;
> > + EFI_STATUS Status;
> > + EFI_HANDLE Handle;
> > +
> > + DEBUG((EFI_D_INFO, "%a - ENTRY\n", __FUNCTION__));
> > +
> > + //
> > + // Iterate through the current MemorySpace Map // MemorySpaceMap
> > + = NULL; Status = gDS->GetMemorySpaceMap (&NumEntries,
> > + &MemorySpaceMap); ASSERT_EFI_ERROR (Status);
> > +
> > + for (Index = 0; Index < NumEntries; ++Index) {
> > + if (MemorySpaceMap[Index].GcdMemoryType ==
> EfiGcdMemoryTypeMemoryMappedIo) {
> > + DEBUG ((DEBUG_INFO, " MMIO: Start = 0x%p, Length = 0x%lX\n",
> > + MemorySpaceMap[Index].BaseAddress,
> MemorySpaceMap[Index].Length));
> > + }
> > + }
> > +
> > + //
> > + // Install GCD Memory Space Map notification protocol //
> > + mGcdMemorySpaceNotifyProtocol.MemorySpaceAddNotify =
> > + GcdMemorySpaceAddNotify;
> > + mGcdMemorySpaceNotifyProtocol.MemorySpaceRemoveNotify =
> > + GcdMemorySpaceRemoveNotify; Handle = NULL; Status = gBS-
> >InstallProtocolInterface (
> > + &Handle,
> > + &gEfiGcdMemorySpaceNotifyProtocolGuid,
> > + EFI_NATIVE_INTERFACE,
> > + &mGcdMemorySpaceNotifyProtocol);
> > + ASSERT_EFI_ERROR (Status);
> > +
> > + DEBUG((EFI_D_INFO, "%a - EXIT (Status = %r)\n", __FUNCTION__,
> > +Status));
> > + return Status;
> > +}
> > diff --git a/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
> > b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
> > new file mode 100644
> > index 0000000..a4c8445
> > --- /dev/null
> > +++ b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
> > @@ -0,0 +1,44 @@
> > +#/** @file
> > +#
> > +# Component description file for GcdNotifyDxe module # # Copyright
> > +(c) 2017, AMD Inc. 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 #
> > +http://opensource.org/licenses/bsd-license.php
> > +#
> > +# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> > +BASIS, # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND,
> EITHER EXPRESS OR IMPLIED.
> > +#
> > +#**/
> > +
> > +[Defines]
> > + INF_VERSION = 0x00010005
> > + BASE_NAME = GcdNotifyDxe
> > + FILE_GUID = 2ec9da37-ee35-4de9-86c5-6d9a81dc38a7
> > + MODULE_TYPE = DXE_DRIVER
> > + VERSION_STRING = 1.0
> > + ENTRY_POINT = GcdNotifyDxeEntry
> > +
> > +[Sources]
> > + GcdNotifyDxe.c
> > +
> > +[Packages]
> > + MdePkg/MdePkg.dec
> > + MdeModulePkg/MdeModulePkg.dec
> > +
> > +[LibraryClasses]
> > + BaseLib
> > + UefiLib
> > + UefiDriverEntryPoint
> > + UefiBootServicesTableLib
> > + DxeServicesTableLib
> > + DebugLib
> > +
> > +[Protocols]
> > + gEfiGcdMemorySpaceNotifyProtocolGuid ## PRODUCES
> > +
> > +[Depex]
> > + TRUE
> > diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc
> b/OvmfPkg/OvmfPkgIa32X64.dsc
> > index 71ac62f..441d7cc 100644
> > --- a/OvmfPkg/OvmfPkgIa32X64.dsc
> > +++ b/OvmfPkg/OvmfPkgIa32X64.dsc
> > @@ -3,6 +3,7 @@
> > #
> > # Copyright (c) 2006 - 2017, Intel Corporation. All rights
> > reserved.<BR> # (C) Copyright 2016 Hewlett Packard Enterprise
> > Development LP<BR>
> > +# Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
> > #
> > # This program and the accompanying materials # are licensed and
> > made available under the terms and conditions of the BSD License @@
> > -798,6 +799,7 @@ !endif
> >
> > OvmfPkg/PlatformDxe/Platform.inf
> > + OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
> >
> > !if $(SMM_REQUIRE) == TRUE
> > OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
> > diff --git a/OvmfPkg/OvmfPkgIa32X64.fdf b/OvmfPkg/OvmfPkgIa32X64.fdf
> > index 5233314..71b118a 100644
> > --- a/OvmfPkg/OvmfPkgIa32X64.fdf
> > +++ b/OvmfPkg/OvmfPkgIa32X64.fdf
> > @@ -3,6 +3,7 @@
> > #
> > # Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > reserved.<BR> # (C) Copyright 2016 Hewlett Packard Enterprise
> > Development LP<BR>
> > +# Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
> > #
> > # This program and the accompanying materials # are licensed and
> > made available under the terms and conditions of the BSD License @@
> > -193,6 +194,7 @@ APRIORI DXE { !if $(SMM_REQUIRE) == FALSE
> > INF
> > OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbServicesRuntimeDxe.inf
> > !endif
> > + INF OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
> > }
> >
> > #
> > @@ -351,6 +353,7 @@ INF RuleOverride=CSM
> OvmfPkg/Csm/Csm16/Csm16.inf
> > INF OvmfPkg/QemuVideoDxe/QemuVideoDxe.inf
> > INF OvmfPkg/VirtioGpuDxe/VirtioGpu.inf
> > INF OvmfPkg/PlatformDxe/Platform.inf
> > +INF OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
> >
> > !if $(SMM_REQUIRE) == TRUE
> > INF OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
> >
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On 04/12/17 22:26, Duran, Leo wrote:
> Lazlo,
>
> This path is *not* intended to be pushed upstream... It's just a "show & tell" for the previous patch.
> Basically, the intent is to illustrate the use-case... so this patch just does a DEBUG out.
Ah, thanks. Sorry, I was misled by the [PATCH] subject prefix. I
generally recommend [RFC] for such patches.
But, the intent is clear now, thank you.
Laszlo
>
> Leo.
>
>> -----Original Message-----
>> From: Laszlo Ersek [mailto:lersek@redhat.com]
>> Sent: Wednesday, April 12, 2017 3:21 PM
>> To: Duran, Leo <leo.duran@amd.com>; edk2-devel@ml01.01.org
>> Cc: Feng Tian <feng.tian@intel.com>; Star Zeng <star.zeng@intel.com>;
>> Brijesh Singh <brijesh.ksingh@gmail.com>
>> Subject: Re: [PATCH] OvmfPkg/GcdNotifyDxe: Install
>> EFI_GCD_MEMORY_SPACE_NOTIFY_PROTOCOL
>>
>> On 04/12/17 21:00, Leo Duran wrote:
>>> On entry, GcdNotifyDxe scans the GCD MemmorySpace map and produces
>>> this protocol to get notifications from GCD on MemorySpace Add/Remove
>> operations.
>>>
>>> This patch illustrates how OvmfPkg could take actions on GCD notifications.
>>> For example: updating the SEV mask on page-table entries for MMIO
>> ranges.
>>>
>>> Cc: Laszlo Ersek <lersek@redhat.com>
>>> Cc: Feng Tian <feng.tian@intel.com>
>>> Cc: Star Zeng <star.zeng@intel.com>
>>> Cc: Brijesh Singh <brijesh.ksingh@gmail.com>
>>> Contributed-under: TianoCore Contribution Agreement 1.0
>>> Signed-off-by: Leo Duran <leo.duran@amd.com>
>>> ---
>>> OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c | 148
>> ++++++++++++++++++++++++++++++++++
>>> OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf | 44 ++++++++++
>>> OvmfPkg/OvmfPkgIa32X64.dsc | 2 +
>>> OvmfPkg/OvmfPkgIa32X64.fdf | 3 +
>>> 4 files changed, 197 insertions(+)
>>> create mode 100644 OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c
>>> create mode 100644 OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
>>
>> I guess this patch depends on
>>
>> [PATCH] MdeModulePkg: Add
>> EFI_GCD_MEMORY_SPACE_NOTIFY_PROTOCOL
>>
>> so I think we should first await the outcome of that discussion.
>>
>> Still, is there any particular reason to include the driver in the
>> OvmfPkgIa32X64 platform only? (No Ia32, no X64?)
>>
>> Thanks
>> Laszlo
>>
>>>
>>> diff --git a/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c
>>> b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c
>>> new file mode 100644
>>> index 0000000..1b54584
>>> --- /dev/null
>>> +++ b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.c
>>> @@ -0,0 +1,148 @@
>>> +/** @file
>>> +
>>> + GCD Memory Space Map notification protocol handler.
>>> +
>>> + Copyright (c) 2017, AMD Inc. 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 http://opensource.org/licenses/bsd-license.php
>>> +
>>> + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
>>> + BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND,
>> EITHER EXPRESS OR IMPLIED.
>>> +
>>> +**/
>>> +
>>> +#include <PiDxe.h>
>>> +
>>> +#include <Library/BaseLib.h>
>>> +#include <Library/UefiLib.h>
>>> +#include <Library/UefiDriverEntryPoint.h> #include
>>> +<Library/UefiBootServicesTableLib.h>
>>> +#include <Library/DxeServicesTableLib.h> #include
>>> +<Library/DebugLib.h>
>>> +
>>> +#include <Protocol/GcdMemorySpaceNotify.h>
>>> +
>>> +//
>>> +// GCD Memory Space Map notification protocol // STATIC
>>> +EFI_GCD_MEMORY_SPACE_NOTIFY_PROTOCOL
>> mGcdMemorySpaceNotifyProtocol;
>>> +
>>> +///
>>> +/// Lookup table used to print GCD Memory Space Map ///
>>> +GLOBAL_REMOVE_IF_UNREFERENCED CONST CHAR8
>> *mGcdMemoryTypeNames[] = {
>>> + "EfiGcdMemoryTypeNonExistent",
>>> + "EfiGcdMemoryTypeReserved",
>>> + "EfiGcdMemoryTypeSystemMemory",
>>> + "EfiGcdMemoryTypeMemoryMappedIo",
>>> + "EfiGcdMemoryTypePersistentMemory",
>>> + "EfiGcdMemoryTypeMoreReliable",
>>> + "EfiGcdMemoryTypeMaximum"
>>> +};
>>> +
>>> +
>>> +/**
>>> +Notify on: Add a segment of memory to GCD map.
>>> +
>>> +@param GcdMemoryType Memory type of the segment.
>>> +@param BaseAddress Base address of the segment.
>>> +@param Length Length of the segment.
>>> +@param Capabilities Alterable attributes of the segment.
>>> +
>>> +**/
>>> +STATIC
>>> +VOID
>>> +EFIAPI
>>> +GcdMemorySpaceAddNotify (
>>> +IN EFI_GCD_MEMORY_TYPE GcdMemoryType,
>>> +IN EFI_PHYSICAL_ADDRESS BaseAddress,
>>> +IN UINT64 Length,
>>> +IN UINT64 Capabilities
>>> +)
>>> +{
>>> + DEBUG ((EFI_D_INFO, "%a()\n", __FUNCTION__));
>>> +
>>> + if (GcdMemoryType >= EfiGcdMemoryTypeNonExistent &&
>> GcdMemoryType <= EfiGcdMemoryTypeMaximum) {
>>> + DEBUG ((EFI_D_INFO, " GcdMemoryType = 0x%X (%a)\n",
>> GcdMemoryType, mGcdMemoryTypeNames[GcdMemoryType]));
>>> + DEBUG ((EFI_D_INFO, " BaseAddress = 0x%p\n", BaseAddress));
>>> + DEBUG ((EFI_D_INFO, " Length = 0x%lX\n", Length));
>>> +
>>> + if (GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo) {
>>> + DEBUG ((EFI_D_INFO, " MMIO: Start = 0x%p, Length = 0x%lX\n",
>> BaseAddress, Length));
>>> + }
>>> + }
>>> + else {
>>> + DEBUG ((EFI_D_INFO, " Invalid GcdMemoryType = 0x%X\n",
>>> +GcdMemoryType));
>>> + }
>>> +}
>>> +
>>> +
>>> +/**
>>> +Notify on: Remove a segment of memory to GCD map.
>>> +
>>> +@param BaseAddress Base address of the segment.
>>> +@param Length Length of the segment.
>>> +
>>> +**/
>>> +STATIC
>>> +VOID
>>> +EFIAPI
>>> +GcdMemorySpaceRemoveNotify (
>>> +IN EFI_PHYSICAL_ADDRESS BaseAddress,
>>> +IN UINT64 Length
>>> +)
>>> +{
>>> + DEBUG ((EFI_D_INFO, "%a()\n", __FUNCTION__));
>>> + DEBUG ((EFI_D_INFO, " BaseAddress = 0x%p\n", BaseAddress));
>>> + DEBUG ((EFI_D_INFO, " Length = 0x%lX\n", Length)); }
>>> +
>>> +
>>> +EFI_STATUS
>>> +EFIAPI
>>> +GcdNotifyDxeEntry (
>>> + IN EFI_HANDLE ImageHandle,
>>> + IN EFI_SYSTEM_TABLE *SystemTable
>>> + )
>>> +{
>>> + EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap;
>>> + UINTN NumEntries;
>>> + UINTN Index;
>>> + EFI_STATUS Status;
>>> + EFI_HANDLE Handle;
>>> +
>>> + DEBUG((EFI_D_INFO, "%a - ENTRY\n", __FUNCTION__));
>>> +
>>> + //
>>> + // Iterate through the current MemorySpace Map // MemorySpaceMap
>>> + = NULL; Status = gDS->GetMemorySpaceMap (&NumEntries,
>>> + &MemorySpaceMap); ASSERT_EFI_ERROR (Status);
>>> +
>>> + for (Index = 0; Index < NumEntries; ++Index) {
>>> + if (MemorySpaceMap[Index].GcdMemoryType ==
>> EfiGcdMemoryTypeMemoryMappedIo) {
>>> + DEBUG ((DEBUG_INFO, " MMIO: Start = 0x%p, Length = 0x%lX\n",
>>> + MemorySpaceMap[Index].BaseAddress,
>> MemorySpaceMap[Index].Length));
>>> + }
>>> + }
>>> +
>>> + //
>>> + // Install GCD Memory Space Map notification protocol //
>>> + mGcdMemorySpaceNotifyProtocol.MemorySpaceAddNotify =
>>> + GcdMemorySpaceAddNotify;
>>> + mGcdMemorySpaceNotifyProtocol.MemorySpaceRemoveNotify =
>>> + GcdMemorySpaceRemoveNotify; Handle = NULL; Status = gBS-
>>> InstallProtocolInterface (
>>> + &Handle,
>>> + &gEfiGcdMemorySpaceNotifyProtocolGuid,
>>> + EFI_NATIVE_INTERFACE,
>>> + &mGcdMemorySpaceNotifyProtocol);
>>> + ASSERT_EFI_ERROR (Status);
>>> +
>>> + DEBUG((EFI_D_INFO, "%a - EXIT (Status = %r)\n", __FUNCTION__,
>>> +Status));
>>> + return Status;
>>> +}
>>> diff --git a/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
>>> b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
>>> new file mode 100644
>>> index 0000000..a4c8445
>>> --- /dev/null
>>> +++ b/OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
>>> @@ -0,0 +1,44 @@
>>> +#/** @file
>>> +#
>>> +# Component description file for GcdNotifyDxe module # # Copyright
>>> +(c) 2017, AMD Inc. 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 #
>>> +http://opensource.org/licenses/bsd-license.php
>>> +#
>>> +# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
>>> +BASIS, # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND,
>> EITHER EXPRESS OR IMPLIED.
>>> +#
>>> +#**/
>>> +
>>> +[Defines]
>>> + INF_VERSION = 0x00010005
>>> + BASE_NAME = GcdNotifyDxe
>>> + FILE_GUID = 2ec9da37-ee35-4de9-86c5-6d9a81dc38a7
>>> + MODULE_TYPE = DXE_DRIVER
>>> + VERSION_STRING = 1.0
>>> + ENTRY_POINT = GcdNotifyDxeEntry
>>> +
>>> +[Sources]
>>> + GcdNotifyDxe.c
>>> +
>>> +[Packages]
>>> + MdePkg/MdePkg.dec
>>> + MdeModulePkg/MdeModulePkg.dec
>>> +
>>> +[LibraryClasses]
>>> + BaseLib
>>> + UefiLib
>>> + UefiDriverEntryPoint
>>> + UefiBootServicesTableLib
>>> + DxeServicesTableLib
>>> + DebugLib
>>> +
>>> +[Protocols]
>>> + gEfiGcdMemorySpaceNotifyProtocolGuid ## PRODUCES
>>> +
>>> +[Depex]
>>> + TRUE
>>> diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc
>> b/OvmfPkg/OvmfPkgIa32X64.dsc
>>> index 71ac62f..441d7cc 100644
>>> --- a/OvmfPkg/OvmfPkgIa32X64.dsc
>>> +++ b/OvmfPkg/OvmfPkgIa32X64.dsc
>>> @@ -3,6 +3,7 @@
>>> #
>>> # Copyright (c) 2006 - 2017, Intel Corporation. All rights
>>> reserved.<BR> # (C) Copyright 2016 Hewlett Packard Enterprise
>>> Development LP<BR>
>>> +# Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
>>> #
>>> # This program and the accompanying materials # are licensed and
>>> made available under the terms and conditions of the BSD License @@
>>> -798,6 +799,7 @@ !endif
>>>
>>> OvmfPkg/PlatformDxe/Platform.inf
>>> + OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
>>>
>>> !if $(SMM_REQUIRE) == TRUE
>>> OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
>>> diff --git a/OvmfPkg/OvmfPkgIa32X64.fdf b/OvmfPkg/OvmfPkgIa32X64.fdf
>>> index 5233314..71b118a 100644
>>> --- a/OvmfPkg/OvmfPkgIa32X64.fdf
>>> +++ b/OvmfPkg/OvmfPkgIa32X64.fdf
>>> @@ -3,6 +3,7 @@
>>> #
>>> # Copyright (c) 2006 - 2016, Intel Corporation. All rights
>>> reserved.<BR> # (C) Copyright 2016 Hewlett Packard Enterprise
>>> Development LP<BR>
>>> +# Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
>>> #
>>> # This program and the accompanying materials # are licensed and
>>> made available under the terms and conditions of the BSD License @@
>>> -193,6 +194,7 @@ APRIORI DXE { !if $(SMM_REQUIRE) == FALSE
>>> INF
>>> OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbServicesRuntimeDxe.inf
>>> !endif
>>> + INF OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
>>> }
>>>
>>> #
>>> @@ -351,6 +353,7 @@ INF RuleOverride=CSM
>> OvmfPkg/Csm/Csm16/Csm16.inf
>>> INF OvmfPkg/QemuVideoDxe/QemuVideoDxe.inf
>>> INF OvmfPkg/VirtioGpuDxe/VirtioGpu.inf
>>> INF OvmfPkg/PlatformDxe/Platform.inf
>>> +INF OvmfPkg/GcdNotifyDxe/GcdNotifyDxe.inf
>>>
>>> !if $(SMM_REQUIRE) == TRUE
>>> INF OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
>>>
>
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