ArmVirtPkg: ArmVirtQemu: expose only 64-bit entry point for v3.0+ SMBIOS

[mirror_edk2.git] / ArmVirtPkg / ArmVirtQemu.dsc

diff --git a/ArmVirtPkg/ArmVirtQemu.dsc b/ArmVirtPkg/ArmVirtQemu.dsc
index e6440ec5da32d618c535d654863076a1a58f6ca6..e2641fd2c28951512659b2f8d407b8e610ff1d2f 100644 (file)
--- a/ArmVirtPkg/ArmVirtQemu.dsc
+++ b/ArmVirtPkg/ArmVirtQemu.dsc
@@ -169,6 +169,14 @@
   # support anything bigger, even if the host hardware does\r
   gEmbeddedTokenSpaceGuid.PcdPrePiCpuMemorySize|40\r
 \r
+  # Clearing BIT0 in this PCD prevents installing a 32-bit SMBIOS entry point,\r
+  # if the entry point version is >= 3.0. AARCH64 OSes cannot assume the\r
+  # presence of the 32-bit entry point anyway (because many AARCH64 systems\r
+  # don't have 32-bit addressable physical RAM), and the additional allocations\r
+  # below 4 GB needlessly fragment the memory map. So expose the 64-bit entry\r
+  # point only, for entry point versions >= 3.0.\r
+  gEfiMdeModulePkgTokenSpaceGuid.PcdSmbiosEntryPointProvideMethod|0x2\r
+\r
 [PcdsDynamicDefault.common]\r
   ## If TRUE, OvmfPkg/AcpiPlatformDxe will not wait for PCI\r
   #  enumeration to complete before installing ACPI tables.\r