From: Min M Xu <min.m...@intel.com>
RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3937
Lazy accept page can be controlled in build time like below:
-D LAZY_ACCEPT_PARTIAL_MEM=512
The unit is MB. If it is 0 then it means Lazy-accept is turned off.
Lazy-accept is turned off by default in OvmfPkgX64.
Lazy-accept is turned on with 512MB by default in IntelTdxX64.
Cc: Erdem Aktas <erdemak...@google.com>
Cc: Gerd Hoffmann <kra...@redhat.com>
Cc: James Bottomley <j...@linux.ibm.com>
Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Tom Lendacky <thomas.lenda...@amd.com>
Signed-off-by: Min Xu <min.m...@intel.com>
---
OvmfPkg/IntelTdx/IntelTdxX64.dsc | 8 ++++++++
OvmfPkg/OvmfPkg.dec | 4 ++++
OvmfPkg/OvmfPkgX64.dsc | 9 +++++++++
3 files changed, 21 insertions(+)
diff --git a/OvmfPkg/IntelTdx/IntelTdxX64.dsc b/OvmfPkg/IntelTdx/IntelTdxX64.dsc
index 43ab8bd089d9..c6195ab9c9d7 100644
--- a/OvmfPkg/IntelTdx/IntelTdxX64.dsc
+++ b/OvmfPkg/IntelTdx/IntelTdxX64.dsc
@@ -62,6 +62,11 @@
#
DEFINE UP_CPU_DXE_GUID = 6490f1c5-ebcc-4665-8892-0075b9bb49b7
+ #
+ # Define the size of lazy accepted memory. The unit is MB.
+ #
+ DEFINE LAZY_ACCEPT_PARTIAL_MEM = 512
+
[BuildOptions]
GCC:RELEASE_*_*_CC_FLAGS = -DMDEPKG_NDEBUG
INTEL:RELEASE_*_*_CC_FLAGS = /D MDEPKG_NDEBUG
@@ -450,6 +455,9 @@
# Point to the MdeModulePkg/Application/UiApp/UiApp.inf
gEfiMdeModulePkgTokenSpaceGuid.PcdBootManagerMenuFile|{ 0x21, 0xaa, 0x2c,
0x46, 0x14, 0x76, 0x03, 0x45, 0x83, 0x6e, 0x8a, 0xb6, 0xf4, 0x66, 0x23, 0x31 }
+ # The partial memory size in Lazy accept
+
gUefiOvmfPkgTokenSpaceGuid.PcdLazyAcceptPartialMemorySize|$(LAZY_ACCEPT_PARTIAL_MEM)
+
################################################################################
#
# Pcd Dynamic Section - list of all EDK II PCD Entries defined by this Platform
diff --git a/OvmfPkg/OvmfPkg.dec b/OvmfPkg/OvmfPkg.dec
index 5fe487f82d1a..7444765fe760 100644
--- a/OvmfPkg/OvmfPkg.dec
+++ b/OvmfPkg/OvmfPkg.dec
@@ -399,6 +399,10 @@
## The Tdx accept page size. 0x1000(4k),0x200000(2M)
gUefiOvmfPkgTokenSpaceGuid.PcdTdxAcceptPageSize|0x200000|UINT32|0x65
+ ## The partial memory size in Lazy accept. Its unit is MB.
+ ## The default value is 0 which means lazy accept is turned off.
+ gUefiOvmfPkgTokenSpaceGuid.PcdLazyAcceptPartialMemorySize|0|UINT64|0x68
+
[PcdsDynamic, PcdsDynamicEx]
gUefiOvmfPkgTokenSpaceGuid.PcdEmuVariableEvent|0|UINT64|2
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashVariablesEnable|FALSE|BOOLEAN|0x10
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index 1448f925b782..398981b6dad8 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -78,6 +78,12 @@
DEFINE UP_CPU_PEI_GUID = 280251c4-1d09-4035-9062-839acb5f18c1
DEFINE UP_CPU_DXE_GUID = 6490f1c5-ebcc-4665-8892-0075b9bb49b7
+ #
+ # Define the size of lazy accepted memory. The unit is MB.
+ # In OvmfPkgX64, the lazy accept page is disabled by default.
+ #
+ DEFINE LAZY_ACCEPT_PARTIAL_MEM = 0
+
[BuildOptions]
GCC:RELEASE_*_*_CC_FLAGS = -DMDEPKG_NDEBUG
INTEL:RELEASE_*_*_CC_FLAGS = /D MDEPKG_NDEBUG
@@ -601,6 +607,9 @@
# Point to the MdeModulePkg/Application/UiApp/UiApp.inf
gEfiMdeModulePkgTokenSpaceGuid.PcdBootManagerMenuFile|{ 0x21, 0xaa, 0x2c,
0x46, 0x14, 0x76, 0x03, 0x45, 0x83, 0x6e, 0x8a, 0xb6, 0xf4, 0x66, 0x23, 0x31 }
+ # The partial memory size in Lazy accept
+
gUefiOvmfPkgTokenSpaceGuid.PcdLazyAcceptPartialMemorySize|$(LAZY_ACCEPT_PARTIAL_MEM)
+
################################################################################
#
# Pcd Dynamic Section - list of all EDK II PCD Entries defined by this Platform
--
2.29.2.windows.2
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