From af5902b48f2d3c5d0e81de0afb5be061d689b544 Mon Sep 17 00:00:00 2001
From: Sergii Dmytruk <sergii.dmytruk@3mdeb.com>
Date: Sun, 30 Jun 2024 18:51:35 +0300
Subject: [PATCH] MdeModulePkg: Add PcdCapsuleFmpSupport to set
 EFI_OS_INDICATIONS_FMP_CAPSULE_SUPPORTED

Don't know why EDK never sets this bit (there is only definition with no
uses), maybe nothing actually checks its value.  Whatever the reason is,
it seems like a good idea to make setting it possible.

Signed-off-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com>
---
 MdeModulePkg/MdeModulePkg.dec            | 8 ++++++++
 MdeModulePkg/Universal/BdsDxe/BdsDxe.inf | 1 +
 MdeModulePkg/Universal/BdsDxe/BdsEntry.c | 4 ++++
 3 files changed, 13 insertions(+)

diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 2dd524fda9..f69068683c 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -1598,6 +1598,14 @@
   # @Prompt Maximum Number of PEI Reset Filters, Reset Notifications or Reset Handlers.
   gEfiMdeModulePkgTokenSpaceGuid.PcdMaximumPeiResetNotifies|0x10|UINT32|0x0000010A
 
+  ## Whether to report support of FMP capsules in OsIndicationSupport.<BR><BR>
+  #  This PCD indicates if support of FMP capsules should be advertised.<BR>
+  #   TRUE  - support of FMP capsules is advertised.<BR>
+  #   FALSE - support of FMP capsules is not advertised.<BR>
+  #  If platform does not use this feature, this PCD should be set to FALSE.<BR><BR>
+  # @Prompt Enable advertising support of FMP capsules.
+  gEfiMdeModulePkgTokenSpaceGuid.PcdCapsuleFmpSupport|FALSE|BOOLEAN|0x00000028
+
   ## Capsule On Disk is to deliver capsules via files on Mass Storage device.<BR><BR>
   #  This PCD indicates if the Capsule On Disk is supported.<BR>
   #   TRUE  - Capsule On Disk is supported.<BR>
diff --git a/MdeModulePkg/Universal/BdsDxe/BdsDxe.inf b/MdeModulePkg/Universal/BdsDxe/BdsDxe.inf
index 5bac635def..95d2607b8d 100644
--- a/MdeModulePkg/Universal/BdsDxe/BdsDxe.inf
+++ b/MdeModulePkg/Universal/BdsDxe/BdsDxe.inf
@@ -97,6 +97,7 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdErrorCodeSetVariable              ## SOMETIMES_CONSUMES
   gEfiMdeModulePkgTokenSpaceGuid.PcdTestKeyUsed                       ## CONSUMES
   gEfiMdeModulePkgTokenSpaceGuid.PcdCapsuleOnDiskSupport              ## CONSUMES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdCapsuleFmpSupport                 ## CONSUMES
   gEfiMdeModulePkgTokenSpaceGuid.PcdPlatformRecoverySupport           ## CONSUMES
 
 [Depex]
diff --git a/MdeModulePkg/Universal/BdsDxe/BdsEntry.c b/MdeModulePkg/Universal/BdsDxe/BdsEntry.c
index 3670ae6f28..5b0d8c681e 100644
--- a/MdeModulePkg/Universal/BdsDxe/BdsEntry.c
+++ b/MdeModulePkg/Universal/BdsDxe/BdsEntry.c
@@ -595,6 +595,10 @@ BdsFormalizeOSIndicationVariable (
     OsIndicationSupport |= EFI_OS_INDICATIONS_FILE_CAPSULE_DELIVERY_SUPPORTED;
   }
 
+  if (PcdGetBool (PcdCapsuleFmpSupport)) {
+    OsIndicationSupport |= EFI_OS_INDICATIONS_FMP_CAPSULE_SUPPORTED;
+  }
+
   Status = gRT->SetVariable (
                   EFI_OS_INDICATIONS_SUPPORT_VARIABLE_NAME,
                   &gEfiGlobalVariableGuid,