diff options
Diffstat (limited to 'OvmfPkg/SmbiosPlatformDxe')
| -rw-r--r-- | OvmfPkg/SmbiosPlatformDxe/Qemu.c | 66 | ||||
| -rw-r--r-- | OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.c | 24 | ||||
| -rw-r--r-- | OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.h | 13 | ||||
| -rw-r--r-- | OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf | 3 |
4 files changed, 101 insertions, 5 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;
+}
diff --git a/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.c b/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.c index ac48fb7208..626f7dbbfb 100644 --- a/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.c +++ b/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.c @@ -84,20 +84,20 @@ SmbiosTableLength ( Install all structures from the given SMBIOS structures block
@param Smbios SMBIOS protocol
- @param EntryPointStructure SMBIOS entry point structures block
+ @param TableAddress SMBIOS tables starting address
**/
EFI_STATUS
InstallAllStructures (
IN EFI_SMBIOS_PROTOCOL *Smbios,
- IN SMBIOS_TABLE_ENTRY_POINT *EntryPointStructure
+ IN UINT8 *TableAddress
)
{
EFI_STATUS Status;
SMBIOS_STRUCTURE_POINTER SmbiosTable;
EFI_SMBIOS_HANDLE SmbiosHandle;
- SmbiosTable.Raw = (UINT8*)(UINTN) EntryPointStructure->TableAddress;
+ SmbiosTable.Raw = TableAddress;
if (SmbiosTable.Raw == NULL) {
return EFI_INVALID_PARAMETER;
}
@@ -145,6 +145,7 @@ SmbiosTablePublishEntry ( EFI_STATUS Status;
EFI_SMBIOS_PROTOCOL *Smbios;
SMBIOS_TABLE_ENTRY_POINT *EntryPointStructure;
+ UINT8 *SmbiosTables;
//
// Find the SMBIOS protocol
@@ -159,11 +160,24 @@ SmbiosTablePublishEntry ( }
//
- // Add Xen SMBIOS data if found
+ // Add Xen or QEMU SMBIOS data if found
//
EntryPointStructure = GetXenSmbiosTables ();
if (EntryPointStructure != NULL) {
- Status = InstallAllStructures (Smbios, EntryPointStructure);
+ SmbiosTables = (UINT8*)(UINTN)EntryPointStructure->TableAddress;
+ } else {
+ SmbiosTables = GetQemuSmbiosTables ();
+ }
+
+ 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;
diff --git a/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.h b/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.h index bf99e43ba3..e2606e1de8 100644 --- a/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.h +++ b/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.h @@ -25,6 +25,7 @@ #include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h>
+#include <Library/MemoryAllocationLib.h>
/**
@@ -40,6 +41,18 @@ GetXenSmbiosTables ( /**
+ Locates and extracts the QEMU SMBIOS table data if present in fw_cfg
+
+ @return Address of extracted QEMU SMBIOS data
+
+**/
+UINT8 *
+GetQemuSmbiosTables (
+ VOID
+ );
+
+
+/**
Validates the SMBIOS entry point structure
@param EntryPointStructure SMBIOS entry point structure
diff --git a/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf b/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf index 7058284944..6596392095 100644 --- a/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf +++ b/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf @@ -32,6 +32,7 @@ SmbiosPlatformDxe.h
SmbiosPlatformDxe.c
Xen.c
+ Qemu.c
[Packages]
MdePkg/MdePkg.dec
@@ -45,6 +46,8 @@ UefiDriverEntryPoint
DebugLib
HobLib
+ QemuFwCfgLib
+ MemoryAllocationLib
[Protocols]
gEfiSmbiosProtocolGuid # PROTOCOL ALWAYS_CONSUMED
|