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/** @file
This driver installs SMBIOS information for OVMF
Copyright (c) 2020, Rebecca Cran <rebecca@bsdio.com>
Copyright (c) 2011, Bei Guan <gbtju85@gmail.com>
Copyright (c) 2011 - 2015, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "SmbiosPlatformDxe.h"
#define TYPE0_STRINGS \
"EFI Development Kit II / OVMF\0" /* Vendor */ \
"0.0.0\0" /* BiosVersion */ \
"02/06/2015\0" /* BiosReleaseDate */
//
// Type definition and contents of the default Type 0 SMBIOS table.
//
#pragma pack(1)
typedef struct {
SMBIOS_TABLE_TYPE0 Base;
UINT8 Strings[sizeof(TYPE0_STRINGS)];
} OVMF_TYPE0;
#pragma pack()
STATIC CONST OVMF_TYPE0 mOvmfDefaultType0 = {
{
// SMBIOS_STRUCTURE Hdr
{
EFI_SMBIOS_TYPE_BIOS_INFORMATION, // UINT8 Type
sizeof (SMBIOS_TABLE_TYPE0), // UINT8 Length
},
1, // SMBIOS_TABLE_STRING Vendor
2, // SMBIOS_TABLE_STRING BiosVersion
0xE800,// UINT16 BiosSegment
3, // SMBIOS_TABLE_STRING BiosReleaseDate
0, // UINT8 BiosSize
{ // MISC_BIOS_CHARACTERISTICS BiosCharacteristics
0, // Reserved :2
0, // Unknown :1
1, // BiosCharacteristicsNotSupported :1
// Remaining BiosCharacteristics bits left unset :60
},
{ // BIOSCharacteristicsExtensionBytes[2]
0, // BiosReserved
0x1C // SystemReserved = VirtualMachineSupported |
// UefiSpecificationSupported |
// TargetContentDistributionEnabled
},
0, // UINT8 SystemBiosMajorRelease
0, // UINT8 SystemBiosMinorRelease
0xFF, // UINT8 EmbeddedControllerFirmwareMajorRelease
0xFF // UINT8 EmbeddedControllerFirmwareMinorRelease
},
// Text strings (unformatted area)
TYPE0_STRINGS
};
/**
Validates the SMBIOS entry point structure
@param EntryPointStructure SMBIOS entry point structure
@retval TRUE The entry point structure is valid
@retval FALSE The entry point structure is not valid
**/
BOOLEAN
IsEntryPointStructureValid (
IN SMBIOS_TABLE_ENTRY_POINT *EntryPointStructure
)
{
UINTN Index;
UINT8 Length;
UINT8 Checksum;
UINT8 *BytePtr;
BytePtr = (UINT8*) EntryPointStructure;
Length = EntryPointStructure->EntryPointLength;
Checksum = 0;
for (Index = 0; Index < Length; Index++) {
Checksum = Checksum + (UINT8) BytePtr[Index];
}
if (Checksum != 0) {
return FALSE;
} else {
return TRUE;
}
}
/**
Get SMBIOS record length.
@param SmbiosTable SMBIOS pointer.
**/
UINTN
SmbiosTableLength (
IN SMBIOS_STRUCTURE_POINTER SmbiosTable
)
{
CHAR8 *AChar;
UINTN Length;
AChar = (CHAR8 *)(SmbiosTable.Raw + SmbiosTable.Hdr->Length);
//
// Each structure shall be terminated by a double-null (SMBIOS spec.7.1)
//
while ((*AChar != 0) || (*(AChar + 1) != 0)) {
AChar ++;
}
Length = ((UINTN)AChar - (UINTN)SmbiosTable.Raw + 2);
return Length;
}
/**
Install all structures from the given SMBIOS structures block
@param Smbios SMBIOS protocol
@param TableAddress SMBIOS tables starting address
**/
EFI_STATUS
InstallAllStructures (
IN EFI_SMBIOS_PROTOCOL *Smbios,
IN UINT8 *TableAddress
)
{
EFI_STATUS Status;
SMBIOS_STRUCTURE_POINTER SmbiosTable;
EFI_SMBIOS_HANDLE SmbiosHandle;
BOOLEAN NeedSmbiosType0;
SmbiosTable.Raw = TableAddress;
if (SmbiosTable.Raw == NULL) {
return EFI_INVALID_PARAMETER;
}
NeedSmbiosType0 = TRUE;
while (SmbiosTable.Hdr->Type != 127) {
//
// Log the SMBIOS data for this structure
//
SmbiosHandle = SmbiosTable.Hdr->Handle;
Status = Smbios->Add (
Smbios,
NULL,
&SmbiosHandle,
(EFI_SMBIOS_TABLE_HEADER*) SmbiosTable.Raw
);
ASSERT_EFI_ERROR (Status);
if (SmbiosTable.Hdr->Type == 0) {
NeedSmbiosType0 = FALSE;
}
//
// Get the next structure address
//
SmbiosTable.Raw = (UINT8 *)(SmbiosTable.Raw + SmbiosTableLength (SmbiosTable));
}
if (NeedSmbiosType0) {
//
// Add OVMF default Type 0 (BIOS Information) table
//
SmbiosHandle = SMBIOS_HANDLE_PI_RESERVED;
Status = Smbios->Add (
Smbios,
NULL,
&SmbiosHandle,
(EFI_SMBIOS_TABLE_HEADER*) &mOvmfDefaultType0
);
ASSERT_EFI_ERROR (Status);
}
return EFI_SUCCESS;
}
/**
Installs SMBIOS information for OVMF
@param ImageHandle Module's image handle
@param SystemTable Pointer of EFI_SYSTEM_TABLE
@retval EFI_SUCCESS Smbios data successfully installed
@retval Other Smbios data was not installed
**/
EFI_STATUS
EFIAPI
SmbiosTablePublishEntry (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_SMBIOS_PROTOCOL *Smbios;
SMBIOS_TABLE_ENTRY_POINT *EntryPointStructure;
UINT8 *SmbiosTables = NULL;
//
// Find the SMBIOS protocol
//
Status = gBS->LocateProtocol (
&gEfiSmbiosProtocolGuid,
NULL,
(VOID**)&Smbios
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Add bhyve SMBIOS data
//
EntryPointStructure = GetBhyveSmbiosTables ();
if (EntryPointStructure != NULL) {
SmbiosTables = (UINT8*)(UINTN)EntryPointStructure->TableAddress;
}
if (SmbiosTables != NULL) {
Status = InstallAllStructures (Smbios, SmbiosTables);
//
// Free SmbiosTables if allocated by Qemu (i.e., NOT by Xen):
//
if (EntryPointStructure == NULL) {
FreePool (SmbiosTables);
}
}
return Status;
}
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