a145e28dec
Locate QEMU SMBIOS data in fw_cfg and install it via the SMBIOS protocol. Starting with qemu-2.1, on pc/x86 machines of type >= 2.1, full SMBIOS tables are generated and inserted into fw_cfg (i.e., no per-field patching of locally generated structures is required). Aside from new code to extract a SMBIOS blob from fw_cfg, this patch utilizes the pre-existing infrastructure (already used by Xen) to handle final SMBIOS table creation. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Gabriel Somlo <somlo@cmu.edu> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15542 6f19259b-4bc3-4df7-8a09-765794883524
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/** @file
|
|
Find and extract QEMU SMBIOS data from fw_cfg.
|
|
|
|
Copyright (C) 2014, Gabriel L. Somlo <somlo@cmu.edu>
|
|
|
|
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 "SmbiosPlatformDxe.h"
|
|
#include <Library/QemuFwCfgLib.h>
|
|
#include <Library/MemoryAllocationLib.h>
|
|
|
|
/**
|
|
Locates and extracts the QEMU SMBIOS data if present in fw_cfg
|
|
|
|
@return Address of extracted QEMU SMBIOS data
|
|
|
|
**/
|
|
UINT8 *
|
|
GetQemuSmbiosTables (
|
|
VOID
|
|
)
|
|
{
|
|
SMBIOS_TABLE_ENTRY_POINT QemuAnchor;
|
|
FIRMWARE_CONFIG_ITEM Anchor, Tables;
|
|
UINTN AnchorSize, TablesSize;
|
|
UINT8 *QemuTables;
|
|
|
|
if (EFI_ERROR (QemuFwCfgFindFile (
|
|
"etc/smbios/smbios-anchor", &Anchor, &AnchorSize)) ||
|
|
EFI_ERROR (QemuFwCfgFindFile (
|
|
"etc/smbios/smbios-tables", &Tables, &TablesSize)) ||
|
|
AnchorSize != sizeof (QemuAnchor) ||
|
|
TablesSize == 0) {
|
|
return NULL;
|
|
}
|
|
|
|
//
|
|
// We copy the entry point structure to perform some additional checks,
|
|
// but discard it upon return.
|
|
//
|
|
QemuFwCfgSelectItem (Anchor);
|
|
QemuFwCfgReadBytes (AnchorSize, &QemuAnchor);
|
|
|
|
if (AsciiStrnCmp ((CHAR8 *)QemuAnchor.AnchorString, "_SM_", 4) ||
|
|
AsciiStrnCmp ((CHAR8 *)QemuAnchor.IntermediateAnchorString, "_DMI_", 5) ||
|
|
TablesSize != QemuAnchor.TableLength) {
|
|
return NULL;
|
|
}
|
|
|
|
QemuTables = AllocatePool (TablesSize);
|
|
if (QemuTables == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
QemuFwCfgSelectItem (Tables);
|
|
QemuFwCfgReadBytes (TablesSize, QemuTables);
|
|
|
|
return QemuTables;
|
|
}
|