[PATCH] OvmfPkg/AmdSev/SecretPei: Mark SEV launch secret area as reserved

["Dov Murik" <dovmurik@linux.ibm.com>]

Mark the SEV launch secret MEMFD area as reserved, which will allow the
guest OS to use it during the lifetime of the OS, without creating
copies of the sensitive content.

Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.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: Min Xu <min.m.xu@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Tobin Feldman-Fitzthum <tobin@linux.ibm.com>
Signed-off-by: Dov Murik <dovmurik@linux.ibm.com>
---
 OvmfPkg/AmdSev/SecretPei/SecretPei.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/OvmfPkg/AmdSev/SecretPei/SecretPei.c b/OvmfPkg/AmdSev/SecretPei/SecretPei.c
index db94c26b54d1..6bf1a55dea64 100644
--- a/OvmfPkg/AmdSev/SecretPei/SecretPei.c
+++ b/OvmfPkg/AmdSev/SecretPei/SecretPei.c
@@ -19,7 +19,7 @@ InitializeSecretPei (
   BuildMemoryAllocationHob (
     PcdGet32 (PcdSevLaunchSecretBase),
     ALIGN_VALUE (PcdGet32 (PcdSevLaunchSecretSize), EFI_PAGE_SIZE),
-    EfiBootServicesData
+    EfiReservedMemoryType
     );
 
   return EFI_SUCCESS;
-- 
2.25.1