diff options
Diffstat (limited to 'OvmfPkg')
| -rw-r--r-- | OvmfPkg/AcpiS3SaveDxe/AcpiS3Save.c | 49 | ||||
| -rw-r--r-- | OvmfPkg/AcpiS3SaveDxe/AcpiS3SaveDxe.inf | 4 |
2 files changed, 52 insertions, 1 deletions
diff --git a/OvmfPkg/AcpiS3SaveDxe/AcpiS3Save.c b/OvmfPkg/AcpiS3SaveDxe/AcpiS3Save.c index 80f12eb..684ddb7 100644 --- a/OvmfPkg/AcpiS3SaveDxe/AcpiS3Save.c +++ b/OvmfPkg/AcpiS3SaveDxe/AcpiS3Save.c @@ -28,6 +28,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. #include <Guid/AcpiS3Context.h>
#include <Guid/Acpi.h>
#include <Protocol/AcpiS3Save.h>
+#include <Protocol/S3SaveState.h>
+#include <Protocol/DxeSmmReadyToLock.h>
#include <IndustryStandard/Acpi.h>
#include "AcpiS3Save.h"
@@ -407,6 +409,48 @@ LegacyGetS3MemorySize ( }
/**
+ Save the S3 boot script.
+
+ Note that we trigger DxeSmmReadyToLock here -- otherwise the script wouldn't
+ be saved actually. Triggering this protocol installation event in turn locks
+ down SMM, so no further changes to LockBoxes or SMRAM are possible
+ afterwards.
+**/
+STATIC
+VOID
+EFIAPI
+SaveS3BootScript (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ EFI_S3_SAVE_STATE_PROTOCOL *BootScript;
+ EFI_HANDLE Handle;
+ STATIC CONST UINT8 Info[] = { 0xDE, 0xAD, 0xBE, 0xEF };
+
+ Status = gBS->LocateProtocol (&gEfiS3SaveStateProtocolGuid, NULL,
+ (VOID **) &BootScript);
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Despite the opcode documentation in the PI spec, the protocol
+ // implementation embeds a deep copy of the info in the boot script, rather
+ // than storing just a pointer to runtime or NVS storage.
+ //
+ Status = BootScript->Write(BootScript, EFI_BOOT_SCRIPT_INFORMATION_OPCODE,
+ (UINT32) sizeof Info,
+ (EFI_PHYSICAL_ADDRESS)(UINTN) &Info);
+ ASSERT_EFI_ERROR (Status);
+
+ Handle = NULL;
+ Status = gBS->InstallProtocolInterface (&Handle,
+ &gEfiDxeSmmReadyToLockProtocolGuid, EFI_NATIVE_INTERFACE,
+ NULL);
+ ASSERT_EFI_ERROR (Status);
+}
+
+
+/**
Prepares all information that is needed in the S3 resume boot path.
Allocate the resources or prepare informations and save in ACPI variable set for S3 resume boot path
@@ -511,6 +555,11 @@ S3Ready ( Status = SetLockBoxAttributes (&gEfiAcpiS3ContextGuid, LOCK_BOX_ATTRIBUTE_RESTORE_IN_PLACE);
ASSERT_EFI_ERROR (Status);
+ //
+ // Save the boot script too. Note that this requires/includes emitting the
+ // DxeSmmReadyToLock event, which in turn locks down SMM.
+ //
+ SaveS3BootScript ();
return EFI_SUCCESS;
}
diff --git a/OvmfPkg/AcpiS3SaveDxe/AcpiS3SaveDxe.inf b/OvmfPkg/AcpiS3SaveDxe/AcpiS3SaveDxe.inf index 169e400..159cdb8 100644 --- a/OvmfPkg/AcpiS3SaveDxe/AcpiS3SaveDxe.inf +++ b/OvmfPkg/AcpiS3SaveDxe/AcpiS3SaveDxe.inf @@ -62,6 +62,8 @@ gEfiLegacyBiosProtocolGuid # PROTOCOL ALWAYS_CONSUMED
gEfiLegacyRegion2ProtocolGuid # PROTOCOL SOMETIMES_CONSUMED
gFrameworkEfiMpServiceProtocolGuid # PROTOCOL SOMETIMES_CONSUMED
+ gEfiS3SaveStateProtocolGuid # PROTOCOL ALWAYS_CONSUMED
+ gEfiDxeSmmReadyToLockProtocolGuid # PROTOCOL ALWAYS_CONSUMED
[FeaturePcd]
gEfiIntelFrameworkModulePkgTokenSpaceGuid.PcdPlatformCsmSupport ## CONSUMES
@@ -73,4 +75,4 @@ gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable
[Depex]
- gEfiVariableArchProtocolGuid AND gEfiVariableWriteArchProtocolGuid
+ gEfiVariableArchProtocolGuid AND gEfiVariableWriteArchProtocolGuid AND gEfiS3SaveStateProtocolGuid
|