From 45098bf1b84c9d798fcd4fafff46efb6d4e9c21e Mon Sep 17 00:00:00 2001
From: Hongbin1 Zhang <hongbin1.zhang@intel.com>
Date: Fri, 31 May 2024 15:28:34 +0800
Subject: [PATCH] MdeModulePkg/MdeModulePkg.dec: Add PcdMmCommBufferPages PCD

PcdMmCommBufferPages is to specify the page count allocated for
the MM communication buffer.

Signed-off-by: Hongbin1 Zhang <hongbin1.zhang@intel.com>
Co-authored-by: Jiaxin Wu <jiaxin.wu@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Co-authored-by: Ray Ni <ray.ni@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Wei6 Xu <wei6.xu@intel.com>
Cc: Dun Tan <dun.tan@intel.com>
Cc: Yuanhao Xie <yuanhao.xie@intel.com>
---
 MdeModulePkg/MdeModulePkg.dec | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index e71a4dd5e3..a25f380d02 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -1190,6 +1190,10 @@
   # @Prompt Delay access XHCI register after it issues HCRST (us)
   gEfiMdeModulePkgTokenSpaceGuid.PcdDelayXhciHCReset|2000|UINT16|0x30001060
 
+  ## Specifies the page count allocated for the MM communication buffer.
+  # @Prompt Defines the page allocation for the MM communication buffer; default is 128 pages (512KB).
+  gEfiMdeModulePkgTokenSpaceGuid.PcdMmCommBufferPages|128|UINT32|0x30001061
+
 [PcdsFixedAtBuild, PcdsPatchableInModule]
   ## Dynamic type PCD can be registered callback function for Pcd setting action.
   #  PcdMaxPeiPcdCallBackNumberPerPcdEntry indicates the maximum number of callback function