124b765051
Add PlatformGetLowMemoryCB() callback function for use with PlatformScanE820(). It stores the low memory size in PlatformInfoHob->LowMemory. This replaces calls to PlatformScanOrAdd64BitE820Ram() with non-NULL LowMemory. Write any actions done (setting LowMemory) to the firmware log with INFO loglevel. Also change PlatformGetSystemMemorySizeBelow4gb() to likewise set PlatformInfoHob->LowMemory instead of returning the value. Update all Callers to the new convention. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
138 lines
4.0 KiB
C
138 lines
4.0 KiB
C
/** @file
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Main SEC phase code. Handles initial TDX Hob List Processing
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Copyright (c) 2008, Intel Corporation. All rights reserved.<BR>
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(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiPei.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/HobLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/PciLib.h>
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#include <Library/PrePiLib.h>
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#include <Library/QemuFwCfgLib.h>
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#include <IndustryStandard/Tdx.h>
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#include <IndustryStandard/UefiTcgPlatform.h>
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#include <Library/PlatformInitLib.h>
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#include <OvmfPlatforms.h>
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#include <Pi/PrePiHob.h>
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#include "PeilessStartupInternal.h"
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/**
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* Construct the HobList in SEC phase.
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*
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* @return EFI_SUCCESS Successfully construct the firmware hoblist.
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* @return EFI_NOT_FOUND Cannot find a memory region to be the fw hoblist.
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*/
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EFI_STATUS
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EFIAPI
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ConstructSecHobList (
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)
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{
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UINT32 LowMemorySize;
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UINT32 LowMemoryStart;
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EFI_HOB_HANDOFF_INFO_TABLE *HobList;
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EFI_HOB_PLATFORM_INFO PlatformInfoHob;
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ZeroMem (&PlatformInfoHob, sizeof (PlatformInfoHob));
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PlatformInfoHob.HostBridgeDevId = PciRead16 (OVMF_HOSTBRIDGE_DID);
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PlatformGetSystemMemorySizeBelow4gb (&PlatformInfoHob);
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LowMemorySize = PlatformInfoHob.LowMemory;
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ASSERT (LowMemorySize != 0);
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LowMemoryStart = FixedPcdGet32 (PcdOvmfDxeMemFvBase) + FixedPcdGet32 (PcdOvmfDxeMemFvSize);
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LowMemorySize -= LowMemoryStart;
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DEBUG ((DEBUG_INFO, "LowMemory Start and End: %x, %x\n", LowMemoryStart, LowMemoryStart + LowMemorySize));
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HobList = HobConstructor (
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(VOID *)(UINTN)LowMemoryStart,
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LowMemorySize,
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(VOID *)(UINTN)LowMemoryStart,
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(VOID *)(UINTN)(LowMemoryStart + LowMemorySize)
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);
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SetHobList ((VOID *)(UINT64)HobList);
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return EFI_SUCCESS;
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}
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/**
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* This function is to find a memory region which is the largest one below 4GB.
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* It will be used as the firmware hoblist.
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*
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* @param VmmHobList Vmm passed hoblist which constains the memory information.
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* @return EFI_SUCCESS Successfully construct the firmware hoblist.
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*/
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EFI_STATUS
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EFIAPI
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ConstructFwHobList (
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IN CONST VOID *VmmHobList
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)
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{
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EFI_PEI_HOB_POINTERS Hob;
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EFI_PHYSICAL_ADDRESS PhysicalEnd;
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UINT64 ResourceLength;
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EFI_PHYSICAL_ADDRESS LowMemoryStart;
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UINT64 LowMemoryLength;
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ASSERT (VmmHobList != NULL);
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Hob.Raw = (UINT8 *)VmmHobList;
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LowMemoryLength = 0;
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LowMemoryStart = 0;
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//
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// Parse the HOB list until end of list or matching type is found.
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//
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while (!END_OF_HOB_LIST (Hob)) {
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if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
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if (Hob.ResourceDescriptor->ResourceType == BZ3937_EFI_RESOURCE_MEMORY_UNACCEPTED) {
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PhysicalEnd = Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength;
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ResourceLength = Hob.ResourceDescriptor->ResourceLength;
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if (PhysicalEnd <= BASE_4GB) {
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if (ResourceLength > LowMemoryLength) {
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LowMemoryStart = Hob.ResourceDescriptor->PhysicalStart;
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LowMemoryLength = ResourceLength;
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}
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} else {
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break;
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}
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}
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}
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Hob.Raw = GET_NEXT_HOB (Hob);
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}
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if (LowMemoryLength == 0) {
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DEBUG ((DEBUG_ERROR, "Cannot find a memory region under 4GB for Fw hoblist.\n"));
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return EFI_NOT_FOUND;
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}
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//
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// HobLib doesn't like HobStart at address 0 so adjust is needed
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//
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if (LowMemoryStart == 0) {
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LowMemoryStart += EFI_PAGE_SIZE;
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LowMemoryLength -= EFI_PAGE_SIZE;
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}
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DEBUG ((DEBUG_INFO, "LowMemory Start and End: %x, %x\n", LowMemoryStart, LowMemoryStart + LowMemoryLength));
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HobConstructor (
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(VOID *)LowMemoryStart,
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LowMemoryLength,
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(VOID *)LowMemoryStart,
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(VOID *)(LowMemoryStart + LowMemoryLength)
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);
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SetHobList ((VOID *)(UINT64)LowMemoryStart);
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return EFI_SUCCESS;
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}
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