Add support for initializing and setting the UEFI 2.8 global variable
RuntimeServicesSupported based on the value of a PCD.
Signed-off-by: Jeff Brasen <jbra...@nvidia.com>
---
MdeModulePkg/MdeModulePkg.dec | 18 ++++++++++++++++
MdeModulePkg/Universal/BdsDxe/BdsDxe.inf | 1 +
MdeModulePkg/Universal/BdsDxe/BdsEntry.c | 35 +++++++++++++++++++++++++++++++-
3 files changed, 53 insertions(+), 1 deletion(-)
diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 41b9e70..a1767e4 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -2003,6 +2003,24 @@
# @Prompt Capsule On Disk relocation device path.
gEfiMdeModulePkgTokenSpaceGuid.PcdCodRelocationDevPath|{0xFF}|VOID*|0x0000002f
+ ## Bitmask of supported runtime services<BR>
+ # BIT0 - GetTime
+ # BIT1 - SetTime
+ # BIT2 - GetWakeupTime
+ # BIT3 - SetWakeupTime
+ # BIT4 - GetVariable
+ # BIT5 - GetNextVariableName
+ # BIT6 - SetVariable
+ # BIT7 - SetVirtualAddressMap
+ # BIT8 - ConvertPointer
+ # BIT9 - GetNextHighMonotonicCount
+ # BIT10 - ResetSystem
+ # BIT11 - UpdateCapsule
+ # BIT12 - QueryCapsuleCapabilites
+ # BIT13 - QueryVariableInfo
+ # @Prompt Supported Runtime services bitmask.
+
gEfiMdeModulePkgTokenSpaceGuid.PcdRuntimeServicesSupported|0x3FFF|UINT16|0x00000030
+
[PcdsPatchableInModule]
## Specify memory size with page number for PEI code when
# Loading Module at Fixed Address feature is enabled.
diff --git a/MdeModulePkg/Universal/BdsDxe/BdsDxe.inf
b/MdeModulePkg/Universal/BdsDxe/BdsDxe.inf
index 9310b4d..e4ba9be 100644
--- a/MdeModulePkg/Universal/BdsDxe/BdsDxe.inf
+++ b/MdeModulePkg/Universal/BdsDxe/BdsDxe.inf
@@ -97,6 +97,7 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdTestKeyUsed ##
CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdCapsuleOnDiskSupport ##
CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdPlatformRecoverySupport ##
CONSUMES
+ gEfiMdeModulePkgTokenSpaceGuid.PcdRuntimeServicesSupported ##
CONSUMES
[Depex]
TRUE
diff --git a/MdeModulePkg/Universal/BdsDxe/BdsEntry.c
b/MdeModulePkg/Universal/BdsDxe/BdsEntry.c
index d387dbe..16bc593 100644
--- a/MdeModulePkg/Universal/BdsDxe/BdsEntry.c
+++ b/MdeModulePkg/Universal/BdsDxe/BdsEntry.c
@@ -40,7 +40,8 @@ CHAR16 *mReadOnlyVariables[] = {
EFI_LANG_CODES_VARIABLE_NAME,
EFI_BOOT_OPTION_SUPPORT_VARIABLE_NAME,
EFI_HW_ERR_REC_SUPPORT_VARIABLE_NAME,
- EFI_OS_INDICATIONS_SUPPORT_VARIABLE_NAME
+ EFI_OS_INDICATIONS_SUPPORT_VARIABLE_NAME,
+ EFI_RUNTIME_SERVICES_SUPPORTED_VARIABLE_NAME
};
CHAR16 *mBdsLoadOptionName[] = {
@@ -626,6 +627,33 @@ BdsFormalizeOSIndicationVariable (
/**
+ Formalize RuntimeServicesSupported variable.
+
+**/
+VOID
+BdsFormalizeRuntimeServicesSupportedVariable (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ UINT16 RuntimeServicesSupported;
+
+ RuntimeServicesSupported = PcdGet16 (PcdRuntimeServicesSupported);
+ Status = gRT->SetVariable (
+ EFI_RUNTIME_SERVICES_SUPPORTED_VARIABLE_NAME,
+ &gEfiGlobalVariableGuid,
+ EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS,
+ sizeof(RuntimeServicesSupported),
+ &RuntimeServicesSupported
+ );
+ //
+ // Platform needs to make sure setting volatile variable before calling 3rd
party code shouldn't fail.
+ //
+ ASSERT_EFI_ERROR (Status);
+}
+
+/**
+
Validate variables.
**/
@@ -645,6 +673,11 @@ BdsFormalizeEfiGlobalVariable (
// Validate OSIndication related variable.
//
BdsFormalizeOSIndicationVariable ();
+
+ //
+ // Validate Runtime Services Supported variable.
+ //
+ BdsFormalizeRuntimeServicesSupportedVariable ();
}
/**
--
2.7.4
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