[edk2-devel] [PATCH 2/2] DynamicTablesPkg: Add Smbios Type17 Table generator
Girish Mahadevan via groups.io
gmahadevan=nvidia.com at groups.io
Tue Oct 4 22:43:57 UTC 2022
Hello Sami
Thank you so much for your review, I apologize for the late response.
My comment in line about the handle manager [GM].
Best Regards
Girish
On 9/12/2022 8:57 AM, Sami Mujawar wrote:
> External email: Use caution opening links or attachments
>
>
> Hi Girish,
>
> Thank you for this patch and for the effort for bringing forward dynamic
> SMBIOS generation.
>
> Please find my feedback inline marked [SAMI].
>
> Regards,
>
> Sami Mujawar
>
> On 26/08/2022 06:37 pm, Girish Mahadevan wrote:
>> Add a new CM object to describe memory devices and setup a new
>> Generator Library for SMBIOS Type17 table.
>>
>> Signed-off-by: Girish Mahadevan<gmahadevan at nvidia.com>
>> ---
>> .../Include/ArmNameSpaceObjects.h | 59 +++
>> .../SmbiosType17Lib/SmbiosType17Generator.c | 338 ++++++++++++++++++
>> .../SmbiosType17Lib/SmbiosType17LibArm.inf | 32 ++
>> 3 files changed, 429 insertions(+)
>> create mode 100644
>> DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
>> create mode 100644
>> DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
>>
>> diff --git a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
>> b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
>> index 102e0f96be..199a19e997 100644
>> --- a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
>> +++ b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
>> @@ -63,6 +63,7 @@ typedef enum ArmObjectID {
>> EArmObjPciInterruptMapInfo, ///< 39 - Pci Interrupt Map Info
>> EArmObjRmr, ///< 40 - Reserved Memory
>> Range Node
>> EArmObjMemoryRangeDescriptor, ///< 41 - Memory Range
>> Descriptor
>> + EArmObjMemoryDeviceInfo, ///< 42 - Memory Device
>> Information
>> EArmObjMax
>> } EARM_OBJECT_ID;
>>
>> @@ -1070,6 +1071,64 @@ typedef struct CmArmRmrDescriptor {
>> UINT64 Length;
>> } CM_ARM_MEMORY_RANGE_DESCRIPTOR;
>>
>> +/** A structure that describes the physical memory device.
>> +
>> + The physical memory devices on the system are described by this
>> object.
>> +
>> + SMBIOS Specification v3.5.0 Type17
>> +
>> + ID: EArmObjMemoryDeviceInfo,
>> +*/
>> +typedef struct CmArmMemoryDeviceInfo {
> [SAMI] I think we may need a Token pointing to the Type 16 object so
> that the Physical Memory Array Handle can be setup, see my comment below
> about the HandleManager.
>> + /** Size of the device.
>> + Size of the device in bytes.
>> + */
>> + UINT64 Size;
>> +
>> + /** Device Set */
>> + UINT8 DeviceSet;
>> +
>> + /** Speed of the device
>> + Speed of the device in MegaTransfers/second.
>> + */
>> + UINT32 Speed;
>> +
>> + /** Serial Number of device */
>> + CHAR8 *SerialNum;
>> +
>> + /** AssetTag identifying the device */
>> + CHAR8 *AssetTag;
>> +
>> + /** Device Locator String for the device.
>> + String that describes the slot or position of the device on the
>> board.
>> + */
>> + CHAR8 *DeviceLocator;
>> +
>> + /** Bank locator string for the device.
>> + String that describes the bank where the device is located.
>> + */
>> + CHAR8 *BankLocator;
>> +
>> + /** Firmware version of the memory device */
>> + CHAR8 *FirmwareVersion;
>> +
>> + /** Manufacturer Id.
>> + 2 byte Manufacturer Id as per JEDEC Standard JEP106AV
>> + */
>> + UINT16 ModuleManufacturerId;
>> +
>> + /** Manufacturer Product Id
>> + 2 byte Manufacturer Id as designated by Manufacturer.
>> + */
>> + UINT16 ModuleProductId;
>> +
>> + /** Device Attributes */
>> + UINT8 Attributes;
>> +
>> + /** Device Configured Voltage in millivolts */
>> + UINT16 ConfiguredVoltage;
> [SAMI] This field does not appear to be used in the generator. If the
> intention is to use this in the future, then it may be better to add
> this at a later stage.
>> +} CM_ARM_MEMORY_DEVICE_INFO;
>> +
>> #pragma pack()
>>
>> #endif // ARM_NAMESPACE_OBJECTS_H_
>> diff --git
>> a/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
>> new file mode 100644
>> index 0000000000..5683ca570f
>> --- /dev/null
>> +++
>> b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17Generator.c
>> @@ -0,0 +1,338 @@
>> +/** @file
>> + SMBIOS Type17 Table Generator.
>> +
>> + Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights
>> reserved.
>> + Copyright (c) 2020 - 2021, Arm Limited. All rights reserved.<BR>
>> +
>> + SPDX-License-Identifier: BSD-2-Clause-Patent
>> +**/
>> +
>> +#include <Library/BaseLib.h>
>> +#include <Library/BaseMemoryLib.h>
>> +#include <Library/DebugLib.h>
>> +#include <Library/PrintLib.h>
>> +#include <Library/MemoryAllocationLib.h>
>> +#include <Library/SmbiosType17FixupLib.h>
> [SAMI] I could not find SmbiosType17FixupLib.h in this patch series. Can
> you check, please?
>> +
>> +// Module specific include files.
>> +#include <ConfigurationManagerObject.h>
>> +#include <ConfigurationManagerHelper.h>
>> +#include <Protocol/ConfigurationManagerProtocol.h>
>> +#include <Protocol/Smbios.h>
> [SAMI] I think Protocol/Smbios.h may not be required in this file. Can
> you check, please?
>> +#include <IndustryStandard/SmBios.h>
>> +
>> +/** This macro expands to a function that retrieves the Memory Device
>> + information from the Configuration Manager.
>> +*/
>> +GET_OBJECT_LIST (
>> + EObjNameSpaceArm,
>> + EArmObjMemoryDeviceInfo,
>> + CM_ARM_MEMORY_DEVICE_INFO
>> + )
>> +
>> +// Default Values for Memory Device
>> +STATIC SMBIOS_TABLE_TYPE17 MemDeviceInfoTemplate = {
>> + { // Hdr
>> + EFI_SMBIOS_TYPE_MEMORY_DEVICE, // Type
>> + sizeof (SMBIOS_TABLE_TYPE17), // Length
>> + 0 // Handle
>> + },
>> + 0, // MemoryArrayHandle
>
> [SAMI] Do you have any thoughts on how the MemoryArrayHandle can be setup?
>
> The same applies for the following MemoryErrorInformationHandle field.
>
> I think we need some sort of a HandleManager in DynamicTablesFramework
> that can keep track of the mappings between SMBIOS Objects and Table
> Handles.
>
> e.g. Smbios - HandleManager
>
> +-------------------------------+-------------------------------+
>
> | Object Token | Table Handle |
>
> +-------------------------------+-------------------------------+
>
> | Type16Obj_token | Type 16 Table handle |
>
> +-------------------------------+-------------------------------+
>
> ...
>
> - The Type17Object i.e. CM_ARM_MEMORY_DEVICE_INFO can then hold a token
> for the Type16Object.
>
> - If Type 17 table is to be installed, DynamicTablemanager shall
> search the SMBIOS table list to see if a Type16 table is requested to be
> installed.
>
> - If a Type16 table is present in the list of SMBIOS table to install,
> the Type16 table shall be installed first and an entry is made in the
> Smbios HandleManager to create a mapping of Type16Obj_token <==> Type16
> Table Handle.
>
> - The Type17 table can now be built and if a the Type16Object token is
> provided in CM_ARM_MEMORY_DEVICE_INFO, the Smbios HandleManager shall be
> searched (using Type16Obj_token) to retrieve the Type16 Table handle and
> populate the Type 17 Physical Memory Array Handle field.
>
> I think we may have to experiment a bit before we arrive at the correct
> design. However, please do let me know your thoughts on the above.
>
[GM] I agree with the idea of having a map of CM_OBJECT_TOKENs to SMBIOS
handles. I've added this to the DynamicTableFactoryProtocol.
However when it comes to actually figuring out and adding the reference
SMBIOS handle We've come up with a slightly different approach.
If I understood what you were saying above is:
If we happen to parse a Type17 table
if that Type17 table has a token to a Physical memory array CM_OBJ
if there is an existing Smbios Handle (look up this handle using
the CM_OBJECT_TOKEN)
then use this handle.
else if there is a generator for Type16 registered
call the Type16 generator code first
IMO this gets a bit difficult to manage. Right now the
DynamicTableManagerDxe walks the array of EStdObjSmbiosTableList CM
objects, finds the generator for each Table, invokes it, gets an SMBIOS
record that it then installs via the SmbiosDxe driver.
It seemed a bit convoluted to call the generator and install an SMBIOS
table while within the generator of another Smbios table.
And if there are layers of dependencies (or multiple dependencies) it
could add to the complexities.
Instead what we came up with is:
If we happen to parse a Type17 table
if that Type17 table has a token to a Physical memory array CM_OBJ
if there is an existing Smbios Handle (look up this handle using
the CM_OBJECT_TOKEN )
then use this handle.
else if there is a generator for Type16 Registered
Generate an SMBIOS handle [since SmbiosDxe maintains the
handle DB privately I had to
pick a handle and check if it
clashes with existing records]
Add this SMBIOS handle to the map.
else // No generator present
Proceed without adding any reference
Before Adding any SMBIOS table, we check if there is an existing SMBIOS
handle for the CM_OBJECT_TOKEN (the generator will return a
CM_OBJECT_TOKEN for each SMBIOS record created).
If there is an existing SMBIOS handle, pass that in, else pass in
SMBIOS_HANDLE_PI_RESERVED and let SmbiosDxe assign the handle.
Here is a sample implementation of this approach (it is a WIP, but I
wanted to get your thoughts on it)
https://github.com/tianocore/edk2/compare/master...gmahadevan:edk2-upstream:RFC/smbios-dyntables
Sorry for the long message, please let me know your thoughts.
[/GM]
> [SAMI]
>> + 0, // MemoryErrorInformationHandle
>> + 0xFFFF, // TotalWidth
>> + 0xFFFF, // DataWIdth
>
> [SAMI] I need to find out how these fields should be populated, but the
> Annex A, SMBIOS specification version 3.6.0 says the following:
>
> 4.8.4 Total Width is not 0FFFFh (Unknown) if the memory device is
> installed. (Size is not 0.)
>
> 4.8.5 Data Width is not 0FFFFh (Unknown).
>
> Can you explain how this field is used, please?
>
> [/SAMI]
>
>> + 0x7FFF, // Size (always use Extended
>> Size)
>
> [SAMI] I think this field should be set based on the Size.
>
> The spec says "If the size is 32 GB-1 MB or greater, the field value is
> 7FFFh and the actual size is stored in the Extended Size field."
>
> I think it would be good to have a static function that encodes the
> size in wither the Size field or the Extended Size field.
>
> e.g. UpdateSmbiosTable17Size (SMBIOS_TABLE_TYPE17 *SmbiosRecord, UINTN
> Size) {
>
> if (Size > 32GB-1MB) {
>
> SmbiosRecord->Size = EncodeSize (xxx);
>
> } else {
>
> SmbiosRecord->ExtendedSize = EncodeExtendedSize (xxx);
>
> }
>
> }
>
> [/SAMI]
>
>> + MemoryTypeUnknown, // FormFactor
>> + 0xFF, // DeviceSet
>> + 1, // Device Locator
>> + 2, // Bank Locator
>> + MemoryTypeSdram, // MemoryType
>> + { // TypeDetail
>> + 0
>> + },
>> + 0xFFFF, // Speed (Use Extended Speed)
> [SAMI] Maybe we need a helper function (similar to
> UpdateSmbiosTable17Size()) for this field as well.
>> + 0, // Manufacturer
>> + // (Unused Use
>> ModuleManufactuerId)
>> + 3, // SerialNumber
>> + 4, // AssetTag
>> + 0, // PartNumber
>> + // (Unused Use ModuleProductId)
>> + 0, // Attributes
>> + 0, // ExtendedSize
>> + 2000, // ConfiguredMemoryClockSpeed
> [SAMI] Should this be provided through CM_ARM_MEMORY_DEVICE_INFO?
>> + 0, // MinimumVoltage
>> + 0, // MaximumVoltage
>> + 0, // ConfiguredVoltage
>> + MemoryTechnologyDram, // MemoryTechnology
> [SAMI] Should this be provided through CM_ARM_MEMORY_DEVICE_INFO?
>> + { //
>> MemoryOperatingModeCapability
>> + .Uint16 = 0x000
>> + },
> [SAMI] I think the above initialisation may not be portable.
>> + 5, // FirmwareVersion
>> + 0, // ModuleManufacturerId
>> + 0, // ModuleProductId
>> + 0, //
>> MemorySubsystemContollerManufacturerId
>> + 0, //
>> MemorySybsystemControllerProductId
>> + 0, // NonVolatileSize
>> + 0, // VolatileSize
>> + 0, // CacheSize
>> + 0, // LogicalSize
>> + 0, // ExtendedSpeed
>> + 0, // ExtendedConfiguredMemorySpeed
>> +};
>> +
>> +STATIC CHAR8 UnknownStr[] = "Unknown\0";
> [SAMI] Would it be possible to add the CONST qualifier, please?
>> +
>> +STATIC
>> +EFI_STATUS
>> +EFIAPI
>> +FreeSmbiosType17TableEx (
>> + IN CONST SMBIOS_TABLE_GENERATOR *CONST This,
>> + IN CONST CM_STD_OBJ_SMBIOS_TABLE_INFO *CONST
>> SmbiosTableInfo,
>> + IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST
>> CfgMgrProtocol,
>> + IN OUT SMBIOS_STRUCTURE ***CONST
>> Table,
>> + IN CONST UINTN
>> TableCount
>> + )
>> +{
>> + return EFI_SUCCESS;
>> +}
>> +
>> +/** Construct SMBIOS Type17 Table describing memory devices.
>> +
>> + If this function allocates any resources then they must be freed
>> + in the FreeXXXXTableResources function.
>> +
>> + @param [in] This Pointer to the SMBIOS table generator.
>> + @param [in] SmbiosTableInfo Pointer to the SMBIOS table information.
>> + @param [in] CfgMgrProtocol Pointer to the Configuration Manager
>> + Protocol interface.
>> + @param [out] Table Pointer to the SMBIOS table.
>> +
>> + @retval EFI_SUCCESS Table generated successfully.
>> + @retval EFI_BAD_BUFFER_SIZE The size returned by the Configuration
>> + Manager is less than the Object size
>> for
>> + the requested object.
>> + @retval EFI_INVALID_PARAMETER A parameter is invalid.
>> + @retval EFI_NOT_FOUND Could not find information.
>> + @retval EFI_OUT_OF_RESOURCES Could not allocate memory.
>> + @retval EFI_UNSUPPORTED Unsupported configuration.
>> +**/
>> +STATIC
>> +EFI_STATUS
>> +EFIAPI
>> +BuildSmbiosType17TableEx (
>> + IN CONST SMBIOS_TABLE_GENERATOR *This,
>> + IN CM_STD_OBJ_SMBIOS_TABLE_INFO *CONST
>> SmbiosTableInfo,
>> + IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST
>> CfgMgrProtocol,
>> + OUT SMBIOS_STRUCTURE ***Table,
>> + OUT UINTN *CONST TableCount
>> + )
>> +{
>> + EFI_STATUS Status;
>> + UINT32 NumMemDevices;
>> + SMBIOS_STRUCTURE **TableList;
>> + CM_ARM_MEMORY_DEVICE_INFO *MemoryDevicesInfo;
>> + UINTN Index;
>> + UINTN SerialNumLen;
>> + CHAR8 *SerialNum;
>> + UINTN AssetTagLen;
>> + CHAR8 *AssetTag;
>> + UINTN DeviceLocatorLen;
>> + CHAR8 *DeviceLocator;
>> + UINTN BankLocatorLen;
>> + CHAR8 *BankLocator;
>> + UINTN FirmwareVersionLen;
>> + CHAR8 *FirmwareVersion;
>> + CHAR8 *OptionalStrings;
>> + SMBIOS_TABLE_TYPE17 *SmbiosRecord;
>> +
>> + ASSERT (This != NULL);
>> + ASSERT (SmbiosTableInfo != NULL);
>> + ASSERT (CfgMgrProtocol != NULL);
>> + ASSERT (Table != NULL);
>> + ASSERT (TableCount != NULL);
>> + ASSERT (SmbiosTableInfo->TableGeneratorId == This->GeneratorID);
>> +
>> + DEBUG ((DEBUG_ERROR, "%a : Start \n", __FUNCTION__));
>> + *Table = NULL;
>> + Status = GetEArmObjMemoryDeviceInfo (
>> + CfgMgrProtocol,
>> + CM_NULL_TOKEN,
>> + &MemoryDevicesInfo,
>> + &NumMemDevices
>> + );
>> + if (EFI_ERROR (Status)) {
>> + DEBUG ((
>> + DEBUG_ERROR,
>> + "Failed to get Memory Devices CM Object %r\n",
>> + Status
>> + ));
>> + return Status;
>> + }
>> +
>> + TableList = (SMBIOS_STRUCTURE **)AllocateZeroPool (sizeof
>> (SMBIOS_STRUCTURE *) * NumMemDevices);
> [SAMI] The memory allocated here should be freed in
> FreeSmbiosType17TableEx.
>> + if (TableList == NULL) {
>> + DEBUG ((DEBUG_ERROR, "Failed to alloc memory for %u devices
>> table\n"));
>> + Status = EFI_OUT_OF_RESOURCES;
>> + goto exit;
>> + }
>> +
>> + for (Index = 0; Index < NumMemDevices; Index++) {
>> + if (MemoryDevicesInfo[Index].SerialNum != NULL) {
>> + SerialNumLen = AsciiStrLen (MemoryDevicesInfo[Index].SerialNum);
>> + SerialNum = MemoryDevicesInfo[Index].SerialNum;
>> + } else {
>> + SerialNumLen = AsciiStrLen (UnknownStr);
>> + SerialNum = UnknownStr;
>
> [SAMI] If the serial number is not provided, then should the string
> field be set to 0?
>
> See Section 6.1.3, SMBIOS Spec Version 3.6.0 which states
>
> "If a string field references no string, a null (0) is placed in that
> string field."
>
> [/SAMI]
>
>> + }
>> +
>> + if (MemoryDevicesInfo[Index].AssetTag != NULL) {
>> + AssetTagLen = AsciiStrLen (MemoryDevicesInfo[Index].AssetTag);
>> + AssetTag = MemoryDevicesInfo[Index].AssetTag;
>> + } else {
>> + AssetTagLen = AsciiStrLen (UnknownStr);
>> + AssetTag = UnknownStr;
>> + }
>> +
>> + if (MemoryDevicesInfo[Index].DeviceLocator != NULL) {
>> + DeviceLocatorLen = AsciiStrLen
>> (MemoryDevicesInfo[Index].DeviceLocator);
>> + DeviceLocator = MemoryDevicesInfo[Index].DeviceLocator;
>> + } else {
>> + DeviceLocatorLen = AsciiStrLen (UnknownStr);
>> + DeviceLocator = UnknownStr;
>> + }
>> +
>> + if (MemoryDevicesInfo[Index].BankLocator != NULL) {
>> + BankLocatorLen = AsciiStrLen
>> (MemoryDevicesInfo[Index].BankLocator);
>> + BankLocator = MemoryDevicesInfo[Index].BankLocator;
>> + } else {
>> + BankLocatorLen = AsciiStrLen (UnknownStr);
>> + BankLocator = UnknownStr;
>> + }
>> +
>> + if (MemoryDevicesInfo[Index].FirmwareVersion != NULL) {
>> + FirmwareVersionLen = AsciiStrLen
>> (MemoryDevicesInfo[Index].FirmwareVersion);
>> + FirmwareVersion = MemoryDevicesInfo[Index].FirmwareVersion;
>> + } else {
>> + FirmwareVersionLen = AsciiStrLen (UnknownStr);
>> + FirmwareVersion = UnknownStr;
>> + }
>> +
>> + SmbiosRecord = (SMBIOS_TABLE_TYPE17 *)AllocateZeroPool (
>> + sizeof
>> (SMBIOS_TABLE_TYPE17) +
>> + SerialNumLen + 1 +
>> + AssetTagLen + 1 +
>> DeviceLocatorLen + 1 +
>> + BankLocatorLen + 1 +
>> FirmwareVersionLen + 1 + 1
>> + );
> [SAMI] The memory allocated here needs to be freed in
> FreeSmbiosType17TableEx as SmbiosProtocol->Add () makes a copy of the
> SmbiosTable, see
> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftianocore%2Fedk2%2Fblob%2Fmaster%2FMdeModulePkg%2FUniversal%2FSmbiosDxe%2FSmbiosDxe.c%23L476&data=05%7C01%7Cgmahadevan%40nvidia.com%7C1169a52a2ad140a8d79308da94cf2762%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637985914717380634%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=EnTxn07ekjA7bGUeCg2c0BaUMVW0yU5JFjXNOcZuhQA%3D&reserved=0
> and
> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftianocore%2Fedk2%2Fblob%2Fmaster%2FMdeModulePkg%2FUniversal%2FSmbiosDxe%2FSmbiosDxe.c%23L516&data=05%7C01%7Cgmahadevan%40nvidia.com%7C1169a52a2ad140a8d79308da94cf2762%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637985914717380634%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=d6kU6CdywK4fnOdxE8CyTTM9eQHDE38FzZB7SA2FTqc%3D&reserved=0.
>
>> + if (SmbiosRecord == NULL) {
>> + Status = EFI_OUT_OF_RESOURCES;
>> + goto exit;
>> + }
>> +
>> + CopyMem (SmbiosRecord, &MemDeviceInfoTemplate, sizeof
>> (SMBIOS_TABLE_TYPE17));
>> + SmbiosRecord->ExtendedSize = MemoryDevicesInfo[Index].Size;
>
> [SAMI] CM_ARM_MEMORY_DEVICE_INFO.Size is documented as size in bytes,
> while looking at the SMBIOS specification, section 7.18.5 for the
> Extended Size Bits 30:0 represent the size of the memory device in
> megabytes.
>
> I think it will be useful to create UpdateSmbiosTable17Size() which does
> the appropriate encoding and updation of the SMBIOS table fieds.
>
> [/SAMI]
>
>> + SmbiosRecord->DeviceSet =
>> MemoryDevicesInfo[Index].DeviceSet;
>> + SmbiosRecord->ModuleManufacturerID =
>> + MemoryDevicesInfo[Index].ModuleManufacturerId;
>> + SmbiosRecord->ModuleProductID =
>> + MemoryDevicesInfo[Index].ModuleProductId;
>> + SmbiosRecord->Attributes =
>> + MemoryDevicesInfo[Index].Attributes;
>> + SmbiosRecord->ExtendedSpeed = MemoryDevicesInfo[Index].Speed;
>> + OptionalStrings = (CHAR8 *)(SmbiosRecord + 1);
>> + AsciiSPrint (OptionalStrings, DeviceLocatorLen + 1, DeviceLocator);
> [SAMI] I think we can simplify the publishing of the SMBIOS strings
> using SmbiosStringTableLib. Please see the patch at
> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fedk2.groups.io%2Fg%2Fdevel%2Fmessage%2F93651&data=05%7C01%7Cgmahadevan%40nvidia.com%7C1169a52a2ad140a8d79308da94cf2762%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637985914717380634%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=4xHMP2KfNlcdeBrtH%2FIT1F249uWIoz0XZreF3FSugq8%3D&reserved=0
>> + OptionalStrings = OptionalStrings + DeviceLocatorLen + 1;
>> + AsciiSPrint (OptionalStrings, BankLocatorLen + 1, BankLocator);
>> + OptionalStrings = OptionalStrings + BankLocatorLen + 1;
>> + AsciiSPrint (OptionalStrings, SerialNumLen + 1, SerialNum);
>> + OptionalStrings = OptionalStrings + SerialNumLen + 1;
>> + AsciiSPrint (OptionalStrings, AssetTagLen + 1, AssetTag);
>> + OptionalStrings = OptionalStrings + AssetTagLen + 1;
>> + AsciiSPrint (OptionalStrings, FirmwareVersionLen + 1,
>> FirmwareVersion);
>> + OptionalStrings = OptionalStrings + FirmwareVersionLen + 1;
>> + TableList[Index] = (SMBIOS_STRUCTURE *)SmbiosRecord;
>> + }
>> +
>> + *Table = TableList;
>> + *TableCount = NumMemDevices;
>> +
>> +exit:
>> + DEBUG ((DEBUG_ERROR, "%a : Done \n", __FUNCTION__));
>> + return Status;
>> +}
>> +
>> +/** The interface for the SMBIOS Type17 Table Generator.
>> +*/
>> +STATIC
>> +CONST
>> +SMBIOS_TABLE_GENERATOR SmbiosType17Generator = {
>> + // Generator ID
>> + CREATE_STD_SMBIOS_TABLE_GEN_ID (EStdSmbiosTableIdType17),
>> + // Generator Description
>> + L"SMBIOS.TYPE17.GENERATOR",
>> + // SMBIOS Table Type
>> + EFI_SMBIOS_TYPE_MEMORY_DEVICE,
>> + NULL,
>> + NULL,
>> + // Build table function Extended.
>> + BuildSmbiosType17TableEx,
>> + // Free function Extended.
>> + FreeSmbiosType17TableEx
>> +};
>> +
>> +/** Register the Generator with the SMBIOS Table Factory.
>> +
>> + @param [in] ImageHandle The handle to the image.
>> + @param [in] SystemTable Pointer to the System Table.
>> +
>> + @retval EFI_SUCCESS The Generator is registered.
>> + @retval EFI_INVALID_PARAMETER A parameter is invalid.
>> + @retval EFI_ALREADY_STARTED The Generator for the Table ID
>> + is already registered.
>> +**/
>> +EFI_STATUS
>> +EFIAPI
>> +SmbiosType17LibConstructor (
>> + IN EFI_HANDLE ImageHandle,
>> + IN EFI_SYSTEM_TABLE *SystemTable
>> + )
>> +{
>> + EFI_STATUS Status;
>> +
>> + Status = RegisterSmbiosTableGenerator (&SmbiosType17Generator);
>> + DEBUG ((
>> + DEBUG_INFO,
>> + "SMBIOS Type 17: Register Generator. Status = %r\n",
>> + Status
>> + ));
>> + ASSERT_EFI_ERROR (Status);
>> +
>> + return Status;
>> +}
>> +
>> +/** Deregister the Generator from the SMBIOS Table Factory.
>> +
>> + @param [in] ImageHandle The handle to the image.
>> + @param [in] SystemTable Pointer to the System Table.
>> +
>> + @retval EFI_SUCCESS The Generator is deregistered.
>> + @retval EFI_INVALID_PARAMETER A parameter is invalid.
>> + @retval EFI_NOT_FOUND The Generator is not registered.
>> +**/
>> +EFI_STATUS
>> +EFIAPI
>> +SmbiosType17LibDestructor (
>> + IN EFI_HANDLE ImageHandle,
>> + IN EFI_SYSTEM_TABLE *SystemTable
>> + )
>> +{
>> + EFI_STATUS Status;
>> +
>> + Status = DeregisterSmbiosTableGenerator (&SmbiosType17Generator);
>> + DEBUG ((
>> + DEBUG_INFO,
>> + "SMBIOS Type17: Deregister Generator. Status = %r\n",
>> + Status
>> + ));
>> + ASSERT_EFI_ERROR (Status);
>> + return Status;
>> +}
>> diff --git
>> a/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
>> new file mode 100644
>> index 0000000000..78a80b75f0
>> --- /dev/null
>> +++
>> b/DynamicTablesPkg/Library/Smbios/Arm/SmbiosType17Lib/SmbiosType17LibArm.inf
>> @@ -0,0 +1,32 @@
>> +## @file
>> +# SMBIOS Type17 Table Generator
>> +#
>> +# Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights
>> reserved.
>> +# Copyright (c) 2019 - 2021, Arm Limited. All rights reserved.<BR>
>> +#
>> +# SPDX-License-Identifier: BSD-2-Clause-Patent
>> +##
>> +
>> +[Defines]
>> + INF_VERSION = 0x0001001B
>> + BASE_NAME = SmbiosType17LibArm
>> + FILE_GUID = 1f063bac-f8f1-4e08-8ffd-9aae52c75497
>> + VERSION_STRING = 1.0
>> + MODULE_TYPE = DXE_DRIVER
>> + LIBRARY_CLASS = NULL|DXE_DRIVER
>> + CONSTRUCTOR = SmbiosType17LibConstructor
>> + DESTRUCTOR = SmbiosType17LibDestructor
>> +
>> +[Sources]
>> + SmbiosType17Generator.c
>> +
>> +[Packages]
>> + MdePkg/MdePkg.dec
>> + MdeModulePkg/MdeModulePkg.dec
>> + EmbeddedPkg/EmbeddedPkg.dec
>> + ArmPlatformPkg/ArmPlatformPkg.dec
>> + DynamicTablesPkg/DynamicTablesPkg.dec
>> +
>> +[LibraryClasses]
>> + BaseLib
>> + DebugLib
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