* Mon Sep 02 2024 Miroslav Rezanina <mrezanin@redhat.com> - 20240524-4

- edk2-AmdSevDxe-Fix-the-shim-fallback-reboot-workaround-fo.patch [RHEL-56081]
- Resolves: RHEL-56081
  ([EDK2] Shim fallback reboot workaround might not work on SNP)

edk2-AmdSevDxe-Fix-the-shim-fallback-reboot-workaround-fo.patch

@@ -0,0 +1,63 @@
+From 481310a21104aba17bc0cddd236ecdf69d4ba662 Mon Sep 17 00:00:00 2001
+From: Oliver Steffen <osteffen@redhat.com>
+Date: Mon, 26 Aug 2024 19:25:52 +0200
+Subject: [PATCH] AmdSevDxe: Fix the shim fallback reboot workaround for SNP
+
+RH-Author: Oliver Steffen <osteffen@redhat.com>
+RH-MergeRequest: 68: AmdSevDxe: Fix the shim fallback reboot workaround for SNP
+RH-Jira: RHEL-56081
+RH-Acked-by: Gerd Hoffmann <None>
+RH-Commit: [1/1] ab8678b61d171f9c19459e034483437b29037b4b (osteffen/edk2)
+
+The shim fallback reboot workaround (introduced for SEV-ES) does
+not always work for SEV-SNP, due to a conditional early return.
+
+Let's just register the workaround earlier in this function to
+fix that.
+
+Signed-off-by: Oliver Steffen <osteffen@redhat.com>
+---
+ OvmfPkg/AmdSevDxe/AmdSevDxe.c | 21 +++++++++++----------
+ 1 file changed, 11 insertions(+), 10 deletions(-)
+
+diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.c b/OvmfPkg/AmdSevDxe/AmdSevDxe.c
+index 0eb88e50ff..ca345e95da 100644
+--- a/OvmfPkg/AmdSevDxe/AmdSevDxe.c
++++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.c
+@@ -243,6 +243,17 @@ AmdSevDxeEntryPoint (
+     return EFI_UNSUPPORTED;
+   }
+ 
++  // Shim fallback reboot workaround
++  Status = gBS->CreateEventEx (
++                  EVT_NOTIFY_SIGNAL,
++                  TPL_CALLBACK,
++                  PopulateVarstore,
++                  SystemTable,
++                  &gEfiEndOfDxeEventGroupGuid,
++                  &PopulateVarstoreEvent
++                  );
++  ASSERT_EFI_ERROR (Status);
++
+   //
+   // Iterate through the GCD map and clear the C-bit from MMIO and NonExistent
+   // memory space. The NonExistent memory space will be used for mapping the
+@@ -393,15 +404,5 @@ AmdSevDxeEntryPoint (
+                   );
+   }
+ 
+-  Status = gBS->CreateEventEx (
+-                  EVT_NOTIFY_SIGNAL,
+-                  TPL_CALLBACK,
+-                  PopulateVarstore,
+-                  SystemTable,
+-                  &gEfiEndOfDxeEventGroupGuid,
+-                  &PopulateVarstoreEvent
+-                  );
+-  ASSERT_EFI_ERROR (Status);
+-
+   return EFI_SUCCESS;
+ }
+-- 
+2.39.3
+

edk2.spec

@@ -21,7 +21,7 @@ ExclusiveArch: x86_64 aarch64
 
 Name:       edk2
 Version:    %{GITDATE}
-Release:    3%{?dist}
+Release:    4%{?dist}
 Summary:    UEFI firmware for 64-bit virtual machines
 License:    BSD-2-Clause-Patent and Apache-2.0 and MIT
 URL:        http://www.tianocore.org
@@ -95,6 +95,8 @@ Patch39: edk2-MdeModulePkg-Warn-if-out-of-flash-space-when-writing.patch
 Patch40: edk2-NetworkPkg-DxeNetLib-adjust-PseudoRandom-error-loggi.patch
 # For RHEL-45899 - [RHEL-9.5.0] edk2 hit Failed to generate random data
 Patch41: edk2-NetworkPkg-DxeNetLib-Reword-PseudoRandom-error-loggi.patch
+# For RHEL-56081 - [EDK2] Shim fallback reboot workaround might not work on SNP
+Patch42: edk2-AmdSevDxe-Fix-the-shim-fallback-reboot-workaround-fo.patch
 
 # python3-devel and libuuid-devel are required for building tools.
 # python3-devel is also needed for varstore template generation and
@@ -429,6 +431,11 @@ install -m 0644 \
 
 
 %changelog
+* Mon Sep 02 2024 Miroslav Rezanina <mrezanin@redhat.com> - 20240524-4
+- edk2-AmdSevDxe-Fix-the-shim-fallback-reboot-workaround-fo.patch [RHEL-56081]
+- Resolves: RHEL-56081
+  ([EDK2] Shim fallback reboot workaround might not work on SNP)
+
 * Tue Aug 20 2024 Miroslav Rezanina <mrezanin@redhat.com> - 20240524-3
 - edk2-NetworkPkg-DxeNetLib-adjust-PseudoRandom-error-loggi.patch [RHEL-45899]
 - edk2-NetworkPkg-DxeNetLib-Reword-PseudoRandom-error-loggi.patch [RHEL-45899]