tests/uefi-test-tools: report the SMBIOS entry point structures

On UEFI systems, the SMBIOS entry point (a.k.a. anchor) structures are
found similarly to the ACPI RSD PTR table(s): by scanning the
ConfigurationTable array in the EFI system table for well-known GUIDs.

Locate the SMBIOS 2.1 (32-bit) and 3.0 (64-bit) anchors in the
BiosTablesTest UEFI application, and report the addresses in new fields
appended to the BIOS_TABLES_TEST structure.

Cc: "Philippe Mathieu-Daudé" <philmd@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Launchpad: https://bugs.launchpad.net/qemu/+bug/1821884
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Igor Mammedov <imammedo@redhat.com>

3 files changed, 40 insertions, 10 deletions

diff --git a/tests/uefi-test-tools/UefiTestToolsPkg/BiosTablesTest/BiosTablesTest.c b/tests/uefi-test-tools/UefiTestToolsPkg/BiosTablesTest/BiosTablesTest.c
index b208e17fb0..75891e68ec 100644
--- a/tests/uefi-test-tools/UefiTestToolsPkg/BiosTablesTest/BiosTablesTest.c
+++ b/tests/uefi-test-tools/UefiTestToolsPkg/BiosTablesTest/BiosTablesTest.c
@@ -14,6 +14,7 @@
 
 #include <Guid/Acpi.h>
 #include <Guid/BiosTablesTest.h>
+#include <Guid/SmBios.h>
 #include <Library/BaseLib.h>
 #include <Library/BaseMemoryLib.h>
 #include <Library/MemoryAllocationLib.h>
@@ -55,6 +56,8 @@ BiosTablesTestMain (
   volatile BIOS_TABLES_TEST     *BiosTablesTest;
   CONST VOID                    *Rsdp10;
   CONST VOID                    *Rsdp20;
+  CONST VOID                    *Smbios21;
+  CONST VOID                    *Smbios30;
   CONST EFI_CONFIGURATION_TABLE *ConfigTable;
   CONST EFI_CONFIGURATION_TABLE *ConfigTablesEnd;
   volatile EFI_GUID             *InverseSignature;
@@ -77,31 +80,43 @@ BiosTablesTestMain (
   }
 
   //
-  // Locate both gEfiAcpi10TableGuid and gEfiAcpi20TableGuid config tables in
-  // one go.
+  // Locate all the gEfiAcpi10TableGuid, gEfiAcpi20TableGuid,
+  // gEfiSmbiosTableGuid, gEfiSmbios3TableGuid config tables in one go.
   //
   Rsdp10 = NULL;
   Rsdp20 = NULL;
+  Smbios21 = NULL;
+  Smbios30 = NULL;
   ConfigTable = gST->ConfigurationTable;
   ConfigTablesEnd = gST->ConfigurationTable + gST->NumberOfTableEntries;
-  while ((Rsdp10 == NULL || Rsdp20 == NULL) && ConfigTable < ConfigTablesEnd) {
+  while ((Rsdp10 == NULL || Rsdp20 == NULL ||
+          Smbios21 == NULL || Smbios30 == NULL) &&
+         ConfigTable < ConfigTablesEnd) {
     if (CompareGuid (&ConfigTable->VendorGuid, &gEfiAcpi10TableGuid)) {
       Rsdp10 = ConfigTable->VendorTable;
     } else if (CompareGuid (&ConfigTable->VendorGuid, &gEfiAcpi20TableGuid)) {
       Rsdp20 = ConfigTable->VendorTable;
+    } else if (CompareGuid (&ConfigTable->VendorGuid, &gEfiSmbiosTableGuid)) {
+      Smbios21 = ConfigTable->VendorTable;
+    } else if (CompareGuid (&ConfigTable->VendorGuid, &gEfiSmbios3TableGuid)) {
+      Smbios30 = ConfigTable->VendorTable;
     }
     ++ConfigTable;
   }
 
   AsciiPrint ("%a: BiosTablesTest=%p Rsdp10=%p Rsdp20=%p\n",
     gEfiCallerBaseName, Pages, Rsdp10, Rsdp20);
+  AsciiPrint ("%a: Smbios21=%p Smbios30=%p\n", gEfiCallerBaseName, Smbios21,
+    Smbios30);
 
   //
-  // Store the RSD PTR address(es) first, then the signature second.
+  // Store the config table addresses first, then the signature second.
   //
   BiosTablesTest = Pages;
   BiosTablesTest->Rsdp10 = (UINTN)Rsdp10;
   BiosTablesTest->Rsdp20 = (UINTN)Rsdp20;
+  BiosTablesTest->Smbios21 = (UINTN)Smbios21;
+  BiosTablesTest->Smbios30 = (UINTN)Smbios30;
 
   MemoryFence();
 
diff --git a/tests/uefi-test-tools/UefiTestToolsPkg/BiosTablesTest/BiosTablesTest.inf b/tests/uefi-test-tools/UefiTestToolsPkg/BiosTablesTest/BiosTablesTest.inf
index 924d8a80d0..708bc1e798 100644
--- a/tests/uefi-test-tools/UefiTestToolsPkg/BiosTablesTest/BiosTablesTest.inf
+++ b/tests/uefi-test-tools/UefiTestToolsPkg/BiosTablesTest/BiosTablesTest.inf
@@ -35,6 +35,8 @@
   gBiosTablesTestGuid
   gEfiAcpi10TableGuid
   gEfiAcpi20TableGuid
+  gEfiSmbios3TableGuid
+  gEfiSmbiosTableGuid
 
 [Packages]
   MdePkg/MdePkg.dec
diff --git a/tests/uefi-test-tools/UefiTestToolsPkg/Include/Guid/BiosTablesTest.h b/tests/uefi-test-tools/UefiTestToolsPkg/Include/Guid/BiosTablesTest.h
index 0b72c61254..7a74c121d5 100644
--- a/tests/uefi-test-tools/UefiTestToolsPkg/Include/Guid/BiosTablesTest.h
+++ b/tests/uefi-test-tools/UefiTestToolsPkg/Include/Guid/BiosTablesTest.h
@@ -1,13 +1,14 @@
 /** @file
-  Expose the address(es) of the ACPI RSD PTR table(s) in a MB-aligned structure
-  to the hypervisor.
+  Expose the address(es) of the ACPI RSD PTR table(s) and the SMBIOS entry
+  point(s) in a MB-aligned structure to the hypervisor.
 
   The hypervisor locates the MB-aligned structure based on the signature GUID
-  that is at offset 0 in the structure. Once the RSD PTR address(es) are
-  retrieved, the hypervisor may perform various ACPI checks.
+  that is at offset 0 in the structure. Once the RSD PTR and SMBIOS anchor
+  address(es) are retrieved, the hypervisor may perform various ACPI and SMBIOS
+  checks.
 
-  This feature is a development aid, for supporting ACPI table unit tests in
-  hypervisors. Do not enable in production builds.
+  This feature is a development aid, for supporting ACPI and SMBIOS table unit
+  tests in hypervisors. Do not enable in production builds.
 
   Copyright (C) 2019, Red Hat, Inc.
 
@@ -61,6 +62,18 @@ typedef struct {
   //
   EFI_PHYSICAL_ADDRESS Rsdp10;
   EFI_PHYSICAL_ADDRESS Rsdp20;
+  //
+  // The Smbios21 and Smbios30 fields may be read when the signature GUID
+  // matches. Smbios21 is the guest-physical address of the SMBIOS 2.1 (32-bit)
+  // Entry Point Structure from the SMBIOS v3.2.0 specification, in 8-byte
+  // little endian representation. Smbios30 is the guest-physical address of
+  // the SMBIOS 3.0 (64-bit) Entry Point Structure from the same specification,
+  // in the same representation. Each of these fields may be zero
+  // (independently of the other) if the UEFI System Table does not provide the
+  // corresponding UEFI Configuration Table.
+  //
+  EFI_PHYSICAL_ADDRESS Smbios21;
+  EFI_PHYSICAL_ADDRESS Smbios30;
 } BIOS_TABLES_TEST;
 #pragma pack ()