cf17156d7d
RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429 OvmfPkg/PlatformPei is updated to support Tdx guest. There are below major changes. - Set Tdx related PCDs - Publish Tdx RamRegions In this patch there is another new function BuildPlatformInfoHob (). This function builds EFI_HOB_PLATFORM_INFO which contains the HostBridgeDevId. The hob is built in both Td guest and Non-Td guest. Cc: Ard Biesheuvel <ardb+tianocore@kernel.org> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Erdem Aktas <erdemaktas@google.com> Cc: James Bottomley <jejb@linux.ibm.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> Signed-off-by: Min Xu <min.m.xu@intel.com>
142 lines
3.9 KiB
C
142 lines
3.9 KiB
C
/**@file
|
|
Install a callback when necessary for setting the Feature Control MSR on all
|
|
processors.
|
|
|
|
Copyright (C) 2016, Red Hat, Inc.
|
|
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
**/
|
|
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/PeiServicesLib.h>
|
|
#include <Library/QemuFwCfgLib.h>
|
|
#include <Ppi/MpServices.h>
|
|
#include <Register/ArchitecturalMsr.h>
|
|
#include <IndustryStandard/Tdx.h>
|
|
|
|
#include "Platform.h"
|
|
|
|
//
|
|
// The value to be written to the Feature Control MSR, retrieved from fw_cfg.
|
|
//
|
|
STATIC UINT64 mFeatureControlValue;
|
|
|
|
/**
|
|
Write the Feature Control MSR on an Application Processor or the Boot
|
|
Processor.
|
|
|
|
All APs execute this function in parallel. The BSP executes the function
|
|
separately.
|
|
|
|
@param[in,out] WorkSpace Pointer to the input/output argument workspace
|
|
shared by all processors.
|
|
**/
|
|
STATIC
|
|
VOID
|
|
EFIAPI
|
|
WriteFeatureControl (
|
|
IN OUT VOID *WorkSpace
|
|
)
|
|
{
|
|
if (TdIsEnabled ()) {
|
|
TdVmCall (TDVMCALL_WRMSR, (UINT64)MSR_IA32_FEATURE_CONTROL, mFeatureControlValue, 0, 0, 0);
|
|
} else {
|
|
AsmWriteMsr64 (MSR_IA32_FEATURE_CONTROL, mFeatureControlValue);
|
|
}
|
|
}
|
|
|
|
/**
|
|
Notification function called when EFI_PEI_MP_SERVICES_PPI becomes available.
|
|
|
|
@param[in] PeiServices Indirect reference to the PEI Services Table.
|
|
@param[in] NotifyDescriptor Address of the notification descriptor data
|
|
structure.
|
|
@param[in] Ppi Address of the PPI that was installed.
|
|
|
|
@return Status of the notification. The status code returned from this
|
|
function is ignored.
|
|
**/
|
|
STATIC
|
|
EFI_STATUS
|
|
EFIAPI
|
|
OnMpServicesAvailable (
|
|
IN EFI_PEI_SERVICES **PeiServices,
|
|
IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
|
|
IN VOID *Ppi
|
|
)
|
|
{
|
|
EFI_PEI_MP_SERVICES_PPI *MpServices;
|
|
EFI_STATUS Status;
|
|
|
|
DEBUG ((DEBUG_VERBOSE, "%a: %a\n", gEfiCallerBaseName, __FUNCTION__));
|
|
|
|
//
|
|
// Write the MSR on all the APs in parallel.
|
|
//
|
|
MpServices = Ppi;
|
|
Status = MpServices->StartupAllAPs (
|
|
(CONST EFI_PEI_SERVICES **)PeiServices,
|
|
MpServices,
|
|
WriteFeatureControl, // Procedure
|
|
FALSE, // SingleThread
|
|
0, // TimeoutInMicroSeconds: inf.
|
|
NULL // ProcedureArgument
|
|
);
|
|
if (EFI_ERROR (Status) && (Status != EFI_NOT_STARTED)) {
|
|
DEBUG ((DEBUG_ERROR, "%a: StartupAllAps(): %r\n", __FUNCTION__, Status));
|
|
return Status;
|
|
}
|
|
|
|
//
|
|
// Now write the MSR on the BSP too.
|
|
//
|
|
WriteFeatureControl (NULL);
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
//
|
|
// Notification object for registering the callback, for when
|
|
// EFI_PEI_MP_SERVICES_PPI becomes available.
|
|
//
|
|
STATIC CONST EFI_PEI_NOTIFY_DESCRIPTOR mMpServicesNotify = {
|
|
EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | // Flags
|
|
EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
|
|
&gEfiPeiMpServicesPpiGuid, // Guid
|
|
OnMpServicesAvailable // Notify
|
|
};
|
|
|
|
VOID
|
|
InstallFeatureControlCallback (
|
|
VOID
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
FIRMWARE_CONFIG_ITEM FwCfgItem;
|
|
UINTN FwCfgSize;
|
|
|
|
Status = QemuFwCfgFindFile (
|
|
"etc/msr_feature_control",
|
|
&FwCfgItem,
|
|
&FwCfgSize
|
|
);
|
|
if (EFI_ERROR (Status) || (FwCfgSize != sizeof mFeatureControlValue)) {
|
|
//
|
|
// Nothing to do.
|
|
//
|
|
return;
|
|
}
|
|
|
|
QemuFwCfgSelectItem (FwCfgItem);
|
|
QemuFwCfgReadBytes (sizeof mFeatureControlValue, &mFeatureControlValue);
|
|
|
|
Status = PeiServicesNotifyPpi (&mMpServicesNotify);
|
|
if (EFI_ERROR (Status)) {
|
|
DEBUG ((
|
|
DEBUG_ERROR,
|
|
"%a: failed to set up MP Services callback: %r\n",
|
|
__FUNCTION__,
|
|
Status
|
|
));
|
|
}
|
|
}
|