[PATCH V8 36/47] MdeModulePkg: Add PcdTdxSharedBitMask

["Min Xu" <min.m.xu@intel.com>]

RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429

Guest Physical Address (GPA) space in Td guest is divided into private
and shared sub-spaces, determined by the SHARED bit of GPA. This PCD
holds the shared bit mask. Its default value is 0 and it will be set
in PlatformPei driver if it is of Td guest.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
---
 MdeModulePkg/MdeModulePkg.dec  | 4 ++++
 OvmfPkg/AmdSev/AmdSevX64.dsc   | 3 +++
 OvmfPkg/Bhyve/BhyveX64.dsc     | 3 +++
 OvmfPkg/CloudHv/CloudHvX64.dsc | 3 +++
 OvmfPkg/Microvm/MicrovmX64.dsc | 3 +++
 OvmfPkg/OvmfPkgIa32.dsc        | 3 +++
 OvmfPkg/OvmfPkgIa32X64.dsc     | 1 +
 OvmfPkg/OvmfPkgX64.dsc         | 3 +++
 OvmfPkg/OvmfXen.dsc            | 3 +++
 9 files changed, 26 insertions(+)

diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 463e889e9a68..1a2425974f44 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -2079,6 +2079,10 @@
   # @Prompt Enable PCIe Resizable BAR Capability support.
   gEfiMdeModulePkgTokenSpaceGuid.PcdPcieResizableBarSupport|FALSE|BOOLEAN|0x10000024
 
+  ## This PCD holds the shared bit mask for page table entries when Tdx is enabled.
+  # @Prompt The shared bit mask when Intel Tdx is enabled.
+  gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0|UINT64|0x10000025
+
 [PcdsPatchableInModule]
   ## Specify memory size with page number for PEI code when
   #  Loading Module at Fixed Address feature is enabled.
diff --git a/OvmfPkg/AmdSev/AmdSevX64.dsc b/OvmfPkg/AmdSev/AmdSevX64.dsc
index c173a72134f4..dda98aa43bdb 100644
--- a/OvmfPkg/AmdSev/AmdSevX64.dsc
+++ b/OvmfPkg/AmdSev/AmdSevX64.dsc
@@ -558,6 +558,9 @@
   # Set memory encryption mask
   gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0
 
+  # Set Tdx shared bit mask
+  gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
+
   # Set SEV-ES defaults
   gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0
diff --git a/OvmfPkg/Bhyve/BhyveX64.dsc b/OvmfPkg/Bhyve/BhyveX64.dsc
index 656e407473bb..0daae82d6705 100644
--- a/OvmfPkg/Bhyve/BhyveX64.dsc
+++ b/OvmfPkg/Bhyve/BhyveX64.dsc
@@ -550,6 +550,9 @@
   # Set memory encryption mask
   gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0
 
+  # Set Tdx shared bit mask
+  gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
+
   gEfiSecurityPkgTokenSpaceGuid.PcdOptionRomImageVerificationPolicy|0x00
 
   # MdeModulePkg resolution sets up the system display resolution
diff --git a/OvmfPkg/CloudHv/CloudHvX64.dsc b/OvmfPkg/CloudHv/CloudHvX64.dsc
index c307f1cc7550..1732f281b435 100644
--- a/OvmfPkg/CloudHv/CloudHvX64.dsc
+++ b/OvmfPkg/CloudHv/CloudHvX64.dsc
@@ -603,6 +603,9 @@
   # Set memory encryption mask
   gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0
 
+  # Set Tdx shared bit mask
+  gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
+
   # Set SEV-ES defaults
   gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0
diff --git a/OvmfPkg/Microvm/MicrovmX64.dsc b/OvmfPkg/Microvm/MicrovmX64.dsc
index 0eac0c02c630..cde90f523520 100644
--- a/OvmfPkg/Microvm/MicrovmX64.dsc
+++ b/OvmfPkg/Microvm/MicrovmX64.dsc
@@ -592,6 +592,9 @@
   # Set memory encryption mask
   gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0
 
+  # Set Tdx shared bit mask
+  gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
+
   # Set SEV-ES defaults
   gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0
diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
index 8f02dca63869..01a26c234a88 100644
--- a/OvmfPkg/OvmfPkgIa32.dsc
+++ b/OvmfPkg/OvmfPkgIa32.dsc
@@ -618,6 +618,9 @@
   # Set memory encryption mask
   gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0
 
+  # Set Tdx shared bit mask
+  gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
+
   # Set SEV-ES defaults
   gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
index 98a6748c62dd..bf08e893e053 100644
--- a/OvmfPkg/OvmfPkgIa32X64.dsc
+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -631,6 +631,7 @@
 
   # Set memory encryption mask
   gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
 
   # Set SEV-ES defaults
   gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index 2df5b2999610..3092036bb7f6 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -642,6 +642,9 @@
   # Set memory encryption mask
   gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0
 
+  # Set Tdx shared bit mask
+  gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
+
   # Set SEV-ES defaults
   gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0
diff --git a/OvmfPkg/OvmfXen.dsc b/OvmfPkg/OvmfXen.dsc
index aa27e2256ae9..470c8cfe4d23 100644
--- a/OvmfPkg/OvmfXen.dsc
+++ b/OvmfPkg/OvmfXen.dsc
@@ -495,6 +495,9 @@
   # Set memory encryption mask
   gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0
 
+  # Set Tdx shared bit mask
+  gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
+
   gEfiSecurityPkgTokenSpaceGuid.PcdOptionRomImageVerificationPolicy|0x00
 
 ################################################################################
-- 
2.29.2.windows.2