Kvmtool is a virtual machine manager that enables
hosting KVM guests. Kvmtool allows to vary the
hardware configuration of the emulated platform
it provides to the guest partition. It provides
the current hardware configuration to the firmware
by handing off a device tree containing the hardware
information.
This library parses the kvmtool provided device
tree and populates the system memory map for the
kvmtool emulated platform.
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
---
ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.c | 114 ++++++++++++++++++++
ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.inf | 42 ++++++++
2 files changed, 156 insertions(+)
diff --git a/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.c b/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.c
new file mode 100644
index 0000000000000000000000000000000000000000..0d353733478b2d097d160246007022990a9cbacb
--- /dev/null
+++ b/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.c
@@ -0,0 +1,114 @@
+/** @file
+
+ Copyright (c) 2018, ARM Limited. All rights reserved.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Base.h>
+#include <Library/ArmLib.h>
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemoryAllocationLib.h>
+
+// Number of Virtual Memory Map Descriptors
+#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 5
+
+#define LOG_VM_MAP(txt) \
+ DEBUG (( \
+ DEBUG_ERROR, \
+ "%a: " #txt "\n" \
+ "\tPhysicalBase: 0x%lX\n" \
+ "\tVirtualBase: 0x%lX\n" \
+ "\tLength: 0x%lX\n", \
+ __FUNCTION__, \
+ VirtualMemoryTable[Idx].PhysicalBase, \
+ VirtualMemoryTable[Idx].VirtualBase, \
+ VirtualMemoryTable[Idx].Length \
+ ));
+
+/**
+ Return the Virtual Memory Map of your platform
+
+ This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
+ on your platform.
+
+ @param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR
+ describing a Physical-to-Virtual Memory
+ mapping. This array must be ended by a
+ zero-filled entry. The allocated memory
+ will not be freed.
+
+**/
+VOID
+ArmVirtGetMemoryMap (
+ OUT ARM_MEMORY_REGION_DESCRIPTOR **VirtualMemoryMap
+ )
+{
+ ARM_MEMORY_REGION_DESCRIPTOR *VirtualMemoryTable;
+ UINTN Idx = 0;
+ EFI_PHYSICAL_ADDRESS TopOfAddressSpace;
+
+ ASSERT (VirtualMemoryMap != NULL);
+
+ TopOfAddressSpace = LShiftU64 (1ULL, ArmGetPhysicalAddressBits ());
+
+ VirtualMemoryTable = (ARM_MEMORY_REGION_DESCRIPTOR*)
+ AllocatePages (
+ EFI_SIZE_TO_PAGES (
+ sizeof (ARM_MEMORY_REGION_DESCRIPTOR) *
+ MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
+ )
+ );
+
+ if (VirtualMemoryTable == NULL) {
+ DEBUG ((
+ DEBUG_ERROR,
+ "%a: Error: Failed to Allocate Pages\n",
+ __FUNCTION__
+ ));
+ return;
+ }
+
+ // System DRAM
+ VirtualMemoryTable[Idx].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
+ VirtualMemoryTable[Idx].VirtualBase = VirtualMemoryTable[Idx].PhysicalBase;
+ VirtualMemoryTable[Idx].Length = PcdGet64 (PcdSystemMemorySize);
+ VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
+ LOG_VM_MAP ("System DRAM Memory Map");
+
+ // Peripheral space before DRAM
+ VirtualMemoryTable[++Idx].PhysicalBase = 0x0;
+ VirtualMemoryTable[Idx].VirtualBase = 0x0;
+ VirtualMemoryTable[Idx].Length = PcdGet64 (PcdSystemMemoryBase);
+ VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+ LOG_VM_MAP ("Peripheral space before DRAM");
+
+ // Peripheral space after DRAM
+ VirtualMemoryTable[++Idx].PhysicalBase = PcdGet64 (PcdSystemMemoryBase) +
+ PcdGet64 (PcdSystemMemorySize);
+ VirtualMemoryTable[Idx].VirtualBase = VirtualMemoryTable[Idx].PhysicalBase;
+ VirtualMemoryTable[Idx].Length = TopOfAddressSpace -
+ VirtualMemoryTable[Idx].PhysicalBase;
+ VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+ LOG_VM_MAP ("Peripheral space after DRAM");
+
+ // Map the FV region as normal executable memory
+ VirtualMemoryTable[++Idx].PhysicalBase = PcdGet64 (PcdFvBaseAddress);
+ VirtualMemoryTable[Idx].VirtualBase = VirtualMemoryTable[Idx].PhysicalBase;
+ VirtualMemoryTable[Idx].Length = FixedPcdGet32 (PcdFvSize);
+ VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
+ LOG_VM_MAP ("FV region");
+
+ // End of Table
+ VirtualMemoryTable[++Idx].PhysicalBase = 0;
+ VirtualMemoryTable[Idx].VirtualBase = 0;
+ VirtualMemoryTable[Idx].Length = 0;
+ VirtualMemoryTable[Idx].Attributes = (ARM_MEMORY_REGION_ATTRIBUTES)0;
+
+ ASSERT((Idx + 1) <= MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
+
+ *VirtualMemoryMap = VirtualMemoryTable;
+}
diff --git a/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.inf b/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.inf
new file mode 100644
index 0000000000000000000000000000000000000000..dbf4ceabe3ae0db5e743e1d9a575542dca32ed0a
--- /dev/null
+++ b/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.inf
@@ -0,0 +1,42 @@
+#/* @file
+#
+# Copyright (c) 2018, ARM Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#*/
+
+[Defines]
+ INF_VERSION = 0x0001001B
+ BASE_NAME = KvmtoolVirtMemInfoLib
+ FILE_GUID = B752E953-394F-462C-811C-F8BE35C8C071
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = ArmVirtMemInfoLib
+
+[Sources]
+ KvmtoolVirtMemInfoLib.c
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ ArmVirtPkg/ArmVirtPkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ ArmLib
+ BaseLib
+ BaseMemoryLib
+ DebugLib
+ MemoryAllocationLib
+ PcdLib
+
+[Pcd]
+ gArmTokenSpaceGuid.PcdFvBaseAddress
+ gArmTokenSpaceGuid.PcdSystemMemoryBase
+ gArmTokenSpaceGuid.PcdSystemMemorySize
+
+[FixedPcd]
+ gArmTokenSpaceGuid.PcdFvSize
+
--
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'
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On 5/14/20 10:40 AM, Sami Mujawar wrote:
> Kvmtool is a virtual machine manager that enables
> hosting KVM guests. Kvmtool allows to vary the
> hardware configuration of the emulated platform
> it provides to the guest partition. It provides
> the current hardware configuration to the firmware
> by handing off a device tree containing the hardware
> information.
>
> This library parses the kvmtool provided device
> tree and populates the system memory map for the
> kvmtool emulated platform.
>
> Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
> ---
> ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.c | 114 ++++++++++++++++++++
> ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.inf | 42 ++++++++
> 2 files changed, 156 insertions(+)
>
> diff --git a/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.c b/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.c
> new file mode 100644
> index 0000000000000000000000000000000000000000..0d353733478b2d097d160246007022990a9cbacb
> --- /dev/null
> +++ b/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.c
> @@ -0,0 +1,114 @@
> +/** @file
> +
> + Copyright (c) 2018, ARM Limited. All rights reserved.
> +
> + SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include <Base.h>
> +#include <Library/ArmLib.h>
> +#include <Library/BaseLib.h>
> +#include <Library/BaseMemoryLib.h>
> +#include <Library/DebugLib.h>
> +#include <Library/MemoryAllocationLib.h>
> +
> +// Number of Virtual Memory Map Descriptors
> +#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 5
> +
> +#define LOG_VM_MAP(txt) \
> + DEBUG (( \
> + DEBUG_ERROR, \
> + "%a: " #txt "\n" \
> + "\tPhysicalBase: 0x%lX\n" \
> + "\tVirtualBase: 0x%lX\n" \
> + "\tLength: 0x%lX\n", \
> + __FUNCTION__, \
> + VirtualMemoryTable[Idx].PhysicalBase, \
> + VirtualMemoryTable[Idx].VirtualBase, \
> + VirtualMemoryTable[Idx].Length \
> + ));
> +
> +/**
> + Return the Virtual Memory Map of your platform
> +
> + This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
> + on your platform.
> +
> + @param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR
> + describing a Physical-to-Virtual Memory
> + mapping. This array must be ended by a
> + zero-filled entry. The allocated memory
> + will not be freed.
> +
> +**/
> +VOID
> +ArmVirtGetMemoryMap (
> + OUT ARM_MEMORY_REGION_DESCRIPTOR **VirtualMemoryMap
> + )
> +{
> + ARM_MEMORY_REGION_DESCRIPTOR *VirtualMemoryTable;
> + UINTN Idx = 0;
> + EFI_PHYSICAL_ADDRESS TopOfAddressSpace;
> +
> + ASSERT (VirtualMemoryMap != NULL);
> +
> + TopOfAddressSpace = LShiftU64 (1ULL, ArmGetPhysicalAddressBits ());
> +
> + VirtualMemoryTable = (ARM_MEMORY_REGION_DESCRIPTOR*)
> + AllocatePages (
> + EFI_SIZE_TO_PAGES (
> + sizeof (ARM_MEMORY_REGION_DESCRIPTOR) *
> + MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
> + )
> + );
> +
> + if (VirtualMemoryTable == NULL) {
> + DEBUG ((
> + DEBUG_ERROR,
> + "%a: Error: Failed to Allocate Pages\n",
> + __FUNCTION__
> + ));
> + return;
> + }
> +
> + // System DRAM
> + VirtualMemoryTable[Idx].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
> + VirtualMemoryTable[Idx].VirtualBase = VirtualMemoryTable[Idx].PhysicalBase;
> + VirtualMemoryTable[Idx].Length = PcdGet64 (PcdSystemMemorySize);
> + VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
> + LOG_VM_MAP ("System DRAM Memory Map");
> +
> + // Peripheral space before DRAM
> + VirtualMemoryTable[++Idx].PhysicalBase = 0x0;
> + VirtualMemoryTable[Idx].VirtualBase = 0x0;
> + VirtualMemoryTable[Idx].Length = PcdGet64 (PcdSystemMemoryBase);
> + VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
> + LOG_VM_MAP ("Peripheral space before DRAM");
> +
> + // Peripheral space after DRAM
> + VirtualMemoryTable[++Idx].PhysicalBase = PcdGet64 (PcdSystemMemoryBase) +
> + PcdGet64 (PcdSystemMemorySize);
> + VirtualMemoryTable[Idx].VirtualBase = VirtualMemoryTable[Idx].PhysicalBase;
> + VirtualMemoryTable[Idx].Length = TopOfAddressSpace -
> + VirtualMemoryTable[Idx].PhysicalBase;
> + VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
> + LOG_VM_MAP ("Peripheral space after DRAM");
> +
> + // Map the FV region as normal executable memory
> + VirtualMemoryTable[++Idx].PhysicalBase = PcdGet64 (PcdFvBaseAddress);
> + VirtualMemoryTable[Idx].VirtualBase = VirtualMemoryTable[Idx].PhysicalBase;
> + VirtualMemoryTable[Idx].Length = FixedPcdGet32 (PcdFvSize);
> + VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
> + LOG_VM_MAP ("FV region");
> +
> + // End of Table
> + VirtualMemoryTable[++Idx].PhysicalBase = 0;
> + VirtualMemoryTable[Idx].VirtualBase = 0;
> + VirtualMemoryTable[Idx].Length = 0;
> + VirtualMemoryTable[Idx].Attributes = (ARM_MEMORY_REGION_ATTRIBUTES)0;
> +
> + ASSERT((Idx + 1) <= MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
> +
> + *VirtualMemoryMap = VirtualMemoryTable;
> +}
> diff --git a/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.inf b/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.inf
> new file mode 100644
> index 0000000000000000000000000000000000000000..dbf4ceabe3ae0db5e743e1d9a575542dca32ed0a
> --- /dev/null
> +++ b/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.inf
> @@ -0,0 +1,42 @@
> +#/* @file
> +#
> +# Copyright (c) 2018, ARM Limited. All rights reserved.
> +#
> +# SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +#*/
> +
> +[Defines]
> + INF_VERSION = 0x0001001B
> + BASE_NAME = KvmtoolVirtMemInfoLib
> + FILE_GUID = B752E953-394F-462C-811C-F8BE35C8C071
> + MODULE_TYPE = BASE
> + VERSION_STRING = 1.0
> + LIBRARY_CLASS = ArmVirtMemInfoLib
> +
> +[Sources]
> + KvmtoolVirtMemInfoLib.c
> +
> +[Packages]
> + ArmPkg/ArmPkg.dec
> + ArmVirtPkg/ArmVirtPkg.dec
> + EmbeddedPkg/EmbeddedPkg.dec
> + MdeModulePkg/MdeModulePkg.dec
> + MdePkg/MdePkg.dec
> +
> +[LibraryClasses]
> + ArmLib
> + BaseLib
> + BaseMemoryLib
> + DebugLib
> + MemoryAllocationLib
> + PcdLib
> +
> +[Pcd]
> + gArmTokenSpaceGuid.PcdFvBaseAddress
> + gArmTokenSpaceGuid.PcdSystemMemoryBase
> + gArmTokenSpaceGuid.PcdSystemMemorySize
> +
> +[FixedPcd]
> + gArmTokenSpaceGuid.PcdFvSize
> +
>
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On 05/14/20 10:40, Sami Mujawar wrote:
> Kvmtool is a virtual machine manager that enables
> hosting KVM guests. Kvmtool allows to vary the
> hardware configuration of the emulated platform
> it provides to the guest partition. It provides
> the current hardware configuration to the firmware
> by handing off a device tree containing the hardware
> information.
>
> This library parses the kvmtool provided device
> tree and populates the system memory map for the
> kvmtool emulated platform.
>
> Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
> ---
> ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.c | 114 ++++++++++++++++++++
> ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.inf | 42 ++++++++
> 2 files changed, 156 insertions(+)
>
> diff --git a/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.c b/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.c
> new file mode 100644
> index 0000000000000000000000000000000000000000..0d353733478b2d097d160246007022990a9cbacb
> --- /dev/null
> +++ b/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.c
> @@ -0,0 +1,114 @@
> +/** @file
> +
> + Copyright (c) 2018, ARM Limited. All rights reserved.
> +
> + SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include <Base.h>
> +#include <Library/ArmLib.h>
> +#include <Library/BaseLib.h>
> +#include <Library/BaseMemoryLib.h>
> +#include <Library/DebugLib.h>
> +#include <Library/MemoryAllocationLib.h>
> +
> +// Number of Virtual Memory Map Descriptors
> +#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 5
> +
> +#define LOG_VM_MAP(txt) \
(1) Please use "Txt" at least.
There are some other mild coding style discrepancies in this patch, but
I don't want to obsess about those.
With (1) fixed:
Acked-by: Laszlo Ersek <lersek@redhat.com>
Thanks
Laszlo
> + DEBUG (( \
> + DEBUG_ERROR, \
> + "%a: " #txt "\n" \
> + "\tPhysicalBase: 0x%lX\n" \
> + "\tVirtualBase: 0x%lX\n" \
> + "\tLength: 0x%lX\n", \
> + __FUNCTION__, \
> + VirtualMemoryTable[Idx].PhysicalBase, \
> + VirtualMemoryTable[Idx].VirtualBase, \
> + VirtualMemoryTable[Idx].Length \
> + ));
> +
> +/**
> + Return the Virtual Memory Map of your platform
> +
> + This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
> + on your platform.
> +
> + @param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR
> + describing a Physical-to-Virtual Memory
> + mapping. This array must be ended by a
> + zero-filled entry. The allocated memory
> + will not be freed.
> +
> +**/
> +VOID
> +ArmVirtGetMemoryMap (
> + OUT ARM_MEMORY_REGION_DESCRIPTOR **VirtualMemoryMap
> + )
> +{
> + ARM_MEMORY_REGION_DESCRIPTOR *VirtualMemoryTable;
> + UINTN Idx = 0;
> + EFI_PHYSICAL_ADDRESS TopOfAddressSpace;
> +
> + ASSERT (VirtualMemoryMap != NULL);
> +
> + TopOfAddressSpace = LShiftU64 (1ULL, ArmGetPhysicalAddressBits ());
> +
> + VirtualMemoryTable = (ARM_MEMORY_REGION_DESCRIPTOR*)
> + AllocatePages (
> + EFI_SIZE_TO_PAGES (
> + sizeof (ARM_MEMORY_REGION_DESCRIPTOR) *
> + MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
> + )
> + );
> +
> + if (VirtualMemoryTable == NULL) {
> + DEBUG ((
> + DEBUG_ERROR,
> + "%a: Error: Failed to Allocate Pages\n",
> + __FUNCTION__
> + ));
> + return;
> + }
> +
> + // System DRAM
> + VirtualMemoryTable[Idx].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
> + VirtualMemoryTable[Idx].VirtualBase = VirtualMemoryTable[Idx].PhysicalBase;
> + VirtualMemoryTable[Idx].Length = PcdGet64 (PcdSystemMemorySize);
> + VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
> + LOG_VM_MAP ("System DRAM Memory Map");
> +
> + // Peripheral space before DRAM
> + VirtualMemoryTable[++Idx].PhysicalBase = 0x0;
> + VirtualMemoryTable[Idx].VirtualBase = 0x0;
> + VirtualMemoryTable[Idx].Length = PcdGet64 (PcdSystemMemoryBase);
> + VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
> + LOG_VM_MAP ("Peripheral space before DRAM");
> +
> + // Peripheral space after DRAM
> + VirtualMemoryTable[++Idx].PhysicalBase = PcdGet64 (PcdSystemMemoryBase) +
> + PcdGet64 (PcdSystemMemorySize);
> + VirtualMemoryTable[Idx].VirtualBase = VirtualMemoryTable[Idx].PhysicalBase;
> + VirtualMemoryTable[Idx].Length = TopOfAddressSpace -
> + VirtualMemoryTable[Idx].PhysicalBase;
> + VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
> + LOG_VM_MAP ("Peripheral space after DRAM");
> +
> + // Map the FV region as normal executable memory
> + VirtualMemoryTable[++Idx].PhysicalBase = PcdGet64 (PcdFvBaseAddress);
> + VirtualMemoryTable[Idx].VirtualBase = VirtualMemoryTable[Idx].PhysicalBase;
> + VirtualMemoryTable[Idx].Length = FixedPcdGet32 (PcdFvSize);
> + VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
> + LOG_VM_MAP ("FV region");
> +
> + // End of Table
> + VirtualMemoryTable[++Idx].PhysicalBase = 0;
> + VirtualMemoryTable[Idx].VirtualBase = 0;
> + VirtualMemoryTable[Idx].Length = 0;
> + VirtualMemoryTable[Idx].Attributes = (ARM_MEMORY_REGION_ATTRIBUTES)0;
> +
> + ASSERT((Idx + 1) <= MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
> +
> + *VirtualMemoryMap = VirtualMemoryTable;
> +}
> diff --git a/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.inf b/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.inf
> new file mode 100644
> index 0000000000000000000000000000000000000000..dbf4ceabe3ae0db5e743e1d9a575542dca32ed0a
> --- /dev/null
> +++ b/ArmVirtPkg/Library/KvmtoolVirtMemInfoLib/KvmtoolVirtMemInfoLib.inf
> @@ -0,0 +1,42 @@
> +#/* @file
> +#
> +# Copyright (c) 2018, ARM Limited. All rights reserved.
> +#
> +# SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +#*/
> +
> +[Defines]
> + INF_VERSION = 0x0001001B
> + BASE_NAME = KvmtoolVirtMemInfoLib
> + FILE_GUID = B752E953-394F-462C-811C-F8BE35C8C071
> + MODULE_TYPE = BASE
> + VERSION_STRING = 1.0
> + LIBRARY_CLASS = ArmVirtMemInfoLib
> +
> +[Sources]
> + KvmtoolVirtMemInfoLib.c
> +
> +[Packages]
> + ArmPkg/ArmPkg.dec
> + ArmVirtPkg/ArmVirtPkg.dec
> + EmbeddedPkg/EmbeddedPkg.dec
> + MdeModulePkg/MdeModulePkg.dec
> + MdePkg/MdePkg.dec
> +
> +[LibraryClasses]
> + ArmLib
> + BaseLib
> + BaseMemoryLib
> + DebugLib
> + MemoryAllocationLib
> + PcdLib
> +
> +[Pcd]
> + gArmTokenSpaceGuid.PcdFvBaseAddress
> + gArmTokenSpaceGuid.PcdSystemMemoryBase
> + gArmTokenSpaceGuid.PcdSystemMemorySize
> +
> +[FixedPcd]
> + gArmTokenSpaceGuid.PcdFvSize
> +
>
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