From 1b5420e8071b4f9ba13136f19365542dfe66bf04 Mon Sep 17 00:00:00 2001
From: Dionna Glaze <dionnaglaze@google.com>
Date: Tue, 14 Feb 2023 23:07:19 +0000
Subject: [PATCH] OvmfPkg/AmdSevDxe: Close mAcceptAllMemoryEvent

This event should only trigger once. It should be idempotent, but the
allocation of the memory map itself is observable and can cause
ExitBootServices to fail with a modified map key.

Cc: Thomas Lendacky <Thomas.Lendacky@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: Michael Roth <michael.roth@amd.com>

Signed-off-by: Dionna Glaze <dionnaglaze@google.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
---
 OvmfPkg/AmdSevDxe/AmdSevDxe.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.c b/OvmfPkg/AmdSevDxe/AmdSevDxe.c
index 9c4e3bb406..a726498e27 100644
--- a/OvmfPkg/AmdSevDxe/AmdSevDxe.c
+++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.c
@@ -130,6 +130,7 @@ AcceptAllMemory (
   }
 
   gBS->FreePool (AllDescMap);
+  gBS->CloseEvent (mAcceptAllMemoryEvent);
   return Status;
 }
 
-- 
2.39.2