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/** @file
Find and extract QEMU SMBIOS data from fw_cfg.
Copyright (C) 2014, Gabriel L. Somlo <somlo@cmu.edu>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/DebugLib.h> // ASSERT_EFI_ERROR()
#include <Library/MemoryAllocationLib.h> // AllocatePool()
#include <Library/PcdLib.h> // PcdGetBool()
#include <Library/QemuFwCfgLib.h> // QemuFwCfgFindFile()
#include "SmbiosPlatformDxe.h"
/**
Locates and extracts the QEMU SMBIOS data if present in fw_cfg
@return Address of extracted QEMU SMBIOS data
**/
UINT8 *
GetQemuSmbiosTables (
VOID
)
{
EFI_STATUS Status;
FIRMWARE_CONFIG_ITEM Tables;
UINTN TablesSize;
UINT8 *QemuTables;
if (!PcdGetBool (PcdQemuSmbiosValidated)) {
return NULL;
}
Status = QemuFwCfgFindFile (
"etc/smbios/smbios-tables",
&Tables,
&TablesSize
);
ASSERT_EFI_ERROR (Status);
ASSERT (TablesSize > 0);
QemuTables = AllocatePool (TablesSize);
if (QemuTables == NULL) {
return NULL;
}
QemuFwCfgSelectItem (Tables);
QemuFwCfgReadBytes (TablesSize, QemuTables);
return QemuTables;
}
/**
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;
UINT8 *SmbiosTables;
Status = EFI_NOT_FOUND;
//
// Add QEMU SMBIOS data if found
//
SmbiosTables = GetQemuSmbiosTables ();
if (SmbiosTables != NULL) {
Status = InstallAllStructures (SmbiosTables);
FreePool (SmbiosTables);
}
return Status;
}
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