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/** @file
This file contains DXE driver for publishing empty HSTI table
Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2024, Red Hat. Inc
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiDxe.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/HobLib.h>
#include <Library/HstiLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Library/PcdLib.h>
#include <Library/PlatformInitLib.h>
#include <IndustryStandard/Hsti.h>
#include <IndustryStandard/I440FxPiix4.h>
#include <IndustryStandard/Q35MchIch9.h>
#include "VirtHstiDxe.h"
VOID
VirtHstiSetSupported (
VIRT_ADAPTER_INFO_PLATFORM_SECURITY *VirtHsti,
IN UINT32 ByteIndex,
IN UINT8 BitMask
)
{
ASSERT (ByteIndex < VIRT_HSTI_SECURITY_FEATURE_SIZE);
VirtHsti->SecurityFeaturesRequired[ByteIndex] |= BitMask;
VirtHsti->SecurityFeaturesImplemented[ByteIndex] |= BitMask;
}
BOOLEAN
VirtHstiIsSupported (
VIRT_ADAPTER_INFO_PLATFORM_SECURITY *VirtHsti,
IN UINT32 ByteIndex,
IN UINT8 BitMask
)
{
ASSERT (ByteIndex < VIRT_HSTI_SECURITY_FEATURE_SIZE);
return VirtHsti->SecurityFeaturesImplemented[ByteIndex] & BitMask;
}
VOID
VirtHstiTestResult (
CHAR16 *ErrorMsg,
IN UINT32 ByteIndex,
IN UINT8 BitMask
)
{
EFI_STATUS Status;
ASSERT (ByteIndex < VIRT_HSTI_SECURITY_FEATURE_SIZE);
if (ErrorMsg) {
DEBUG ((DEBUG_ERROR, "VirtHsti: Test failed: %s\n", ErrorMsg));
Status = HstiLibAppendErrorString (
PLATFORM_SECURITY_ROLE_PLATFORM_REFERENCE,
NULL,
ErrorMsg
);
ASSERT_EFI_ERROR (Status);
} else {
Status = HstiLibSetFeaturesVerified (
PLATFORM_SECURITY_ROLE_PLATFORM_REFERENCE,
NULL,
ByteIndex,
BitMask
);
ASSERT_EFI_ERROR (Status);
}
}
STATIC
UINT16
VirtHstiGetHostBridgeDevId (
VOID
)
{
EFI_HOB_GUID_TYPE *GuidHob;
EFI_HOB_PLATFORM_INFO *PlatformInfo;
GuidHob = GetFirstGuidHob (&gUefiOvmfPkgPlatformInfoGuid);
ASSERT (GuidHob);
PlatformInfo = (EFI_HOB_PLATFORM_INFO *)GET_GUID_HOB_DATA (GuidHob);
return PlatformInfo->HostBridgeDevId;
}
STATIC
VOID
EFIAPI
VirtHstiOnReadyToBoot (
EFI_EVENT Event,
VOID *Context
)
{
switch (VirtHstiGetHostBridgeDevId ()) {
case INTEL_82441_DEVICE_ID:
VirtHstiQemuPCVerify ();
VirtHstiQemuCommonVerify ();
break;
case INTEL_Q35_MCH_DEVICE_ID:
VirtHstiQemuQ35Verify ();
VirtHstiQemuCommonVerify ();
break;
default:
ASSERT (FALSE);
}
if (Event != NULL) {
gBS->CloseEvent (Event);
}
}
/**
The driver's entry point.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Some error occurs when executing this entry point.
**/
EFI_STATUS
EFIAPI
VirtHstiDxeEntrypoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
VIRT_ADAPTER_INFO_PLATFORM_SECURITY *VirtHsti;
UINT16 DevId;
EFI_STATUS Status;
EFI_EVENT Event;
if (PcdGet64 (PcdConfidentialComputingGuestAttr)) {
DEBUG ((DEBUG_INFO, "%a: confidential guest\n", __func__));
return EFI_UNSUPPORTED;
}
DevId = VirtHstiGetHostBridgeDevId ();
switch (DevId) {
case INTEL_82441_DEVICE_ID:
VirtHsti = VirtHstiQemuPCInit ();
VirtHstiQemuCommonInit (VirtHsti);
break;
case INTEL_Q35_MCH_DEVICE_ID:
VirtHsti = VirtHstiQemuQ35Init ();
VirtHstiQemuCommonInit (VirtHsti);
break;
default:
DEBUG ((DEBUG_INFO, "%a: unknown platform (0x%x)\n", __func__, DevId));
return EFI_UNSUPPORTED;
}
Status = HstiLibSetTable (VirtHsti, sizeof (*VirtHsti));
if (EFI_ERROR (Status)) {
if (Status != EFI_ALREADY_STARTED) {
ASSERT_EFI_ERROR (Status);
}
}
EfiCreateEventReadyToBootEx (
TPL_NOTIFY,
VirtHstiOnReadyToBoot,
NULL,
&Event
);
return EFI_SUCCESS;
}
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