[edk2-devel] [RFC PATCH] OvmfPkg/OvmfXen: set PcdAcpiS3Enable at initialization
Gary Lin via groups.io
glin=suse.com at groups.io
Thu Jul 8 04:05:49 UTC 2021
There are several functions in OvmfPkg/Library using
QemuFwCfgS3Enabled() to detect the S3 support status. However, in
MdeModulePkg, PcdAcpiS3Enable is used to check S3 support. Since
InitializeXenPlatform() didn't set PcdAcpiS3Enable as
InitializePlatform() did, this made the inconsistency between
drivers/functions.
For example, S3SaveStateDxe checked PcdAcpiS3Enable and skipped
S3BootScript because the default value is FALSE. On the other hand,
PlatformBootManagerBeforeConsole() from OvmfPkg/Library called
QemuFwCfgS3Enabled() and found it returned TRUE, so it invoked
SaveS3BootScript(). However, S3SaveStateDxe skipped S3BootScript, so
SaveS3BootScript() asserted due to EFI_NOT_FOUND.
Setting PcdAcpiS3Enable at InitializeXenPlatform() "fixes" the crash
reported by my colleague. The other possible direction is to replace
QemuFwCfgS3Enabled() with PcdAcpiS3Enable. I'm not sure which one is
the right fix.
Cc: Laszlo Ersek <lersek at redhat.com>
Cc: Ard Biesheuvel <ardb+tianocore at kernel.org>
Cc: Jordan Justen <jordan.l.justen at intel.com>
Cc: Anthony Perard <anthony.perard at citrix.com>
Cc: Julien Grall <julien at xen.org>
Cc: Jim Fehlig <jfehlig at suse.com>
Signed-off-by: Gary Lin <glin at suse.com>
---
OvmfPkg/XenPlatformPei/Platform.c | 10 ++++++++++
OvmfPkg/XenPlatformPei/XenPlatformPei.inf | 3 +++
2 files changed, 13 insertions(+)
diff --git a/OvmfPkg/XenPlatformPei/Platform.c b/OvmfPkg/XenPlatformPei/Platform.c
index a811e72ee301..f7edc979486e 100644
--- a/OvmfPkg/XenPlatformPei/Platform.c
+++ b/OvmfPkg/XenPlatformPei/Platform.c
@@ -26,6 +26,8 @@
#include <Library/PciLib.h>
#include <Library/PeimEntryPoint.h>
#include <Library/PeiServicesLib.h>
+#include <Library/QemuFwCfgLib.h>
+#include <Library/QemuFwCfgS3Lib.h>
#include <Library/ResourcePublicationLib.h>
#include <Guid/MemoryTypeInformation.h>
#include <Ppi/MasterBootMode.h>
@@ -423,6 +425,8 @@ InitializeXenPlatform (
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
+ EFI_STATUS Status;
+
DEBUG ((DEBUG_INFO, "Platform PEIM Loaded\n"));
DebugDumpCmos ();
@@ -433,6 +437,12 @@ InitializeXenPlatform (
CpuDeadLoop ();
}
+ if (QemuFwCfgS3Enabled ()) {
+ DEBUG ((DEBUG_INFO, "S3 support was detected on QEMU\n"));
+ Status = PcdSetBoolS (PcdAcpiS3Enable, TRUE);
+ ASSERT_EFI_ERROR (Status);
+ }
+
XenConnect ();
BootModeInitialization ();
diff --git a/OvmfPkg/XenPlatformPei/XenPlatformPei.inf b/OvmfPkg/XenPlatformPei/XenPlatformPei.inf
index 597cb6fcd7ff..1e22c0b2e2aa 100644
--- a/OvmfPkg/XenPlatformPei/XenPlatformPei.inf
+++ b/OvmfPkg/XenPlatformPei/XenPlatformPei.inf
@@ -57,6 +57,8 @@ [LibraryClasses]
ResourcePublicationLib
PeiServicesLib
PeimEntryPoint
+ QemuFwCfgLib
+ QemuFwCfgS3Lib
MtrrLib
MemEncryptSevLib
PcdLib
@@ -79,6 +81,7 @@ [Pcd]
gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Base
gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Size
gUefiOvmfPkgTokenSpaceGuid.PcdQ35TsegMbytes
+ gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiS3Enable
gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize
gEfiMdeModulePkgTokenSpaceGuid.PcdEmuVariableNvStoreReserved
gEfiMdeModulePkgTokenSpaceGuid.PcdDxeIplSwitchToLongMode
--
2.31.1
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