diff options
| author | Gabriel Somlo <somlo@cmu.edu> | 2014-05-20 16:33:19 +0000 |
|---|---|---|
| committer | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2014-05-20 16:33:19 +0000 |
| commit | a145e28decc529bf26981ae57c3fc2ffe0b946f2 (patch) | |
| tree | efb48cc2330ec371614f251c4fda42fcbbd15526 /OvmfPkg/SmbiosPlatformDxe/Qemu.c | |
| parent | 6b23d767f6c762178503cf26e4c6d066fd311f25 (diff) | |
| download | edk2-a145e28decc529bf26981ae57c3fc2ffe0b946f2.tar.gz edk2-a145e28decc529bf26981ae57c3fc2ffe0b946f2.tar.bz2 edk2-a145e28decc529bf26981ae57c3fc2ffe0b946f2.zip | |
OvmfPkg/SMBIOS: Add QEMU support to OVMF SMBIOS driver
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
Diffstat (limited to 'OvmfPkg/SmbiosPlatformDxe/Qemu.c')
| -rw-r--r-- | OvmfPkg/SmbiosPlatformDxe/Qemu.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/OvmfPkg/SmbiosPlatformDxe/Qemu.c b/OvmfPkg/SmbiosPlatformDxe/Qemu.c new file mode 100644 index 0000000000..f7ace4f1de --- /dev/null +++ b/OvmfPkg/SmbiosPlatformDxe/Qemu.c @@ -0,0 +1,66 @@ +/** @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;
+}
|