121 lines
3.9 KiB
Diff
121 lines
3.9 KiB
Diff
|
From 9f0b4df867e6a2d56838e4048be245eac3fcc18e Mon Sep 17 00:00:00 2001
|
||
|
|
From: Oliver Steffen <osteffen@redhat.com>
|
||
|
|
Date: Wed, 16 Aug 2023 12:09:40 +0200
|
||
|
|
Subject: [PATCH 3/3] OvmfPkg/AmdSevDxe: Shim Reboot workaround (RHEL only)
|
||
|
|
|
||
|
|
RH-Author: Oliver Steffen <osteffen@redhat.com>
|
||
|
|
RH-MergeRequest: 46: OvmfPkg/AmdSevDxe: Shim Reboot workaround (RHEL only)
|
||
|
|
RH-Bugzilla: 2218196
|
||
|
|
RH-Acked-by: Gerd Hoffmann <None>
|
||
|
|
RH-Commit: [1/1] 9bf3bb989e36253aa34bf82ecfe8faa7312e8d22 (osteffen/edk2)
|
||
|
|
|
||
|
|
Add a callback at the end of the Dxe phase that sets the
|
||
|
|
"FB_NO_REBOOT" variable under the Shim GUID.
|
||
|
|
This is a workaround for a boot loop in case a confidential
|
||
|
|
guest that uses shim is booted with a vtpm device present.
|
||
|
|
|
||
|
|
BZ 2218196
|
||
|
|
|
||
|
|
Signed-off-by: Oliver Steffen <osteffen@redhat.com>
|
||
|
|
---
|
||
|
|
OvmfPkg/AmdSevDxe/AmdSevDxe.c | 42 +++++++++++++++++++++++++++++++++
|
||
|
|
OvmfPkg/AmdSevDxe/AmdSevDxe.inf | 2 ++
|
||
|
|
2 files changed, 44 insertions(+)
|
||
|
|
|
||
|
|
diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.c b/OvmfPkg/AmdSevDxe/AmdSevDxe.c
|
||
|
|
index db3675ae86..f639c093a2 100644
|
||
|
|
--- a/OvmfPkg/AmdSevDxe/AmdSevDxe.c
|
||
|
|
+++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.c
|
||
|
|
@@ -19,6 +19,7 @@
|
||
|
|
#include <Library/MemoryAllocationLib.h>
|
||
|
|
#include <Library/UefiBootServicesTableLib.h>
|
||
|
|
#include <Guid/ConfidentialComputingSevSnpBlob.h>
|
||
|
|
+#include <Guid/GlobalVariable.h>
|
||
|
|
#include <Library/PcdLib.h>
|
||
|
|
#include <Pi/PrePiDxeCis.h>
|
||
|
|
#include <Protocol/SevMemoryAcceptance.h>
|
||
|
|
@@ -28,6 +29,10 @@
|
||
|
|
// Present, initialized, tested bits defined in MdeModulePkg/Core/Dxe/DxeMain.h
|
||
|
|
#define EFI_MEMORY_INTERNAL_MASK 0x0700000000000000ULL
|
||
|
|
|
||
|
|
+static EFI_GUID ShimLockGuid = {
|
||
|
|
+ 0x605dab50, 0xe046, 0x4300, { 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23 }
|
||
|
|
+};
|
||
|
|
+
|
||
|
|
STATIC
|
||
|
|
EFI_STATUS
|
||
|
|
AllocateConfidentialComputingBlob (
|
||
|
|
@@ -191,6 +196,32 @@ STATIC EDKII_MEMORY_ACCEPT_PROTOCOL mMemoryAcceptProtocol = {
|
||
|
|
AmdSevMemoryAccept
|
||
|
|
};
|
||
|
|
|
||
|
|
+VOID
|
||
|
|
+EFIAPI
|
||
|
|
+PopulateVarstore (
|
||
|
|
+ EFI_EVENT Event,
|
||
|
|
+ VOID *Context
|
||
|
|
+ )
|
||
|
|
+{
|
||
|
|
+ EFI_SYSTEM_TABLE *SystemTable = (EFI_SYSTEM_TABLE *)Context;
|
||
|
|
+ EFI_STATUS Status;
|
||
|
|
+
|
||
|
|
+ DEBUG ((DEBUG_INFO, "Populating Varstore\n"));
|
||
|
|
+ UINT32 data = 1;
|
||
|
|
+
|
||
|
|
+ Status = SystemTable->RuntimeServices->SetVariable (
|
||
|
|
+ L"FB_NO_REBOOT",
|
||
|
|
+ &ShimLockGuid,
|
||
|
|
+ EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS,
|
||
|
|
+ sizeof (data),
|
||
|
|
+ &data
|
||
|
|
+ );
|
||
|
|
+ ASSERT_EFI_ERROR (Status);
|
||
|
|
+
|
||
|
|
+ Status = SystemTable->BootServices->CloseEvent (Event);
|
||
|
|
+ ASSERT_EFI_ERROR (Status);
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
EFI_STATUS
|
||
|
|
EFIAPI
|
||
|
|
AmdSevDxeEntryPoint (
|
||
|
|
@@ -203,6 +234,7 @@ AmdSevDxeEntryPoint (
|
||
|
|
UINTN NumEntries;
|
||
|
|
UINTN Index;
|
||
|
|
CONFIDENTIAL_COMPUTING_SNP_BLOB_LOCATION *SnpBootDxeTable;
|
||
|
|
+ EFI_EVENT PopulateVarstoreEvent;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Do nothing when SEV is not enabled
|
||
|
|
@@ -361,5 +393,15 @@ AmdSevDxeEntryPoint (
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
+ Status = gBS->CreateEventEx (
|
||
|
|
+ EVT_NOTIFY_SIGNAL,
|
||
|
|
+ TPL_CALLBACK,
|
||
|
|
+ PopulateVarstore,
|
||
|
|
+ SystemTable,
|
||
|
|
+ &gEfiEndOfDxeEventGroupGuid,
|
||
|
|
+ &PopulateVarstoreEvent
|
||
|
|
+ );
|
||
|
|
+ ASSERT_EFI_ERROR (Status);
|
||
|
|
+
|
||
|
|
return EFI_SUCCESS;
|
||
|
|
}
|
||
|
|
diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.inf b/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
|
||
|
|
index e7c7d526c9..09cbd2b0ca 100644
|
||
|
|
--- a/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
|
||
|
|
+++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
|
||
|
|
@@ -54,6 +54,8 @@
|
||
|
|
[Guids]
|
||
|
|
gConfidentialComputingSevSnpBlobGuid
|
||
|
|
gEfiEventBeforeExitBootServicesGuid
|
||
|
|
+ gEfiEndOfDxeEventGroupGuid ## CONSUMES ## Event
|
||
|
|
+
|
||
|
|
|
||
|
|
[Pcd]
|
||
|
|
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfHostBridgePciDevId
|
||
|
|
--
|
||
|
|
2.39.3
|
||
|
|
|