Add UEFI 2.5 properties table support in DXE core.
Add PropertiesTableAttributesDxe driver to set ACPINvs/Reserved memory type to be XP, as default policy. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: "Yao, Jiewen" <Jiewen.yao@intel.com> Reviewed-by: "Zeng, Star" <Star.Zeng@intel.com> Reviewed-by: "Gao, Liming" <Liming.Gao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17564 6f19259b-4bc3-4df7-8a09-765794883524
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/**@file
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This module sets default policy for attributes of EfiACPIMemoryNVS and EfiReservedMemoryType.
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This module sets EFI_MEMORY_XP for attributes of EfiACPIMemoryNVS and EfiReservedMemoryType
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in UEFI memory map, if and only of PropertiesTable is published and has BIT0 set.
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Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Uefi.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/DxeServicesTableLib.h>
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#include <Library/UefiLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Guid/EventGroup.h>
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#include <Guid/PropertiesTable.h>
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/**
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Converts a number of EFI_PAGEs to a size in bytes.
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NOTE: Do not use EFI_PAGES_TO_SIZE because it handles UINTN only.
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@param Pages The number of EFI_PAGES.
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@return The number of bytes associated with the number of EFI_PAGEs specified
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by Pages.
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**/
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UINT64
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EfiPagesToSize (
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IN UINT64 Pages
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)
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{
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return LShiftU64 (Pages, EFI_PAGE_SHIFT);
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}
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/**
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Set memory attributes according to default policy.
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@param MemoryMap A pointer to the buffer in which firmware places the current memory map.
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@param MemoryMapSize Size, in bytes, of the MemoryMap buffer.
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@param DescriptorSize size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.
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**/
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VOID
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SetMemorySpaceAttributesDefault (
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IN EFI_MEMORY_DESCRIPTOR *MemoryMap,
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IN UINTN MemoryMapSize,
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IN UINTN DescriptorSize
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)
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{
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EFI_MEMORY_DESCRIPTOR *MemoryMapEntry;
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EFI_MEMORY_DESCRIPTOR *MemoryMapEnd;
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EFI_STATUS Status;
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DEBUG ((EFI_D_INFO, "SetMemorySpaceAttributesDefault\n"));
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MemoryMapEntry = MemoryMap;
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MemoryMapEnd = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) MemoryMap + MemoryMapSize);
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while ((UINTN)MemoryMapEntry < (UINTN)MemoryMapEnd) {
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if (MemoryMapEntry->PhysicalStart < BASE_1MB) {
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//
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// Do not touch memory space below 1MB
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//
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MemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (MemoryMapEntry, DescriptorSize);
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continue;
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}
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switch (MemoryMapEntry->Type) {
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case EfiRuntimeServicesCode:
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case EfiRuntimeServicesData:
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//
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// should be handled later;
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//
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break;
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case EfiReservedMemoryType:
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case EfiACPIMemoryNVS:
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//
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// Handle EfiReservedMemoryType and EfiACPIMemoryNVS, because there might be firmware executable there.
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//
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DEBUG ((EFI_D_INFO, "SetMemorySpaceAttributes - %016lx - %016lx (%016lx) ...\n",
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MemoryMapEntry->PhysicalStart,
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MemoryMapEntry->PhysicalStart + EfiPagesToSize (MemoryMapEntry->NumberOfPages),
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MemoryMapEntry->Attribute
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));
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Status = gDS->SetMemorySpaceCapabilities (
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MemoryMapEntry->PhysicalStart,
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EfiPagesToSize (MemoryMapEntry->NumberOfPages),
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MemoryMapEntry->Attribute | EFI_MEMORY_XP
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);
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DEBUG ((EFI_D_INFO, "SetMemorySpaceCapabilities - %r\n", Status));
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break;
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}
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MemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (MemoryMapEntry, DescriptorSize);
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}
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return ;
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}
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/**
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Update memory attributes according to default policy.
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@param[in] Event The Event this notify function registered to.
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@param[in] Context Pointer to the context data registered to the Event.
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**/
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VOID
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EFIAPI
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UpdateMemoryAttributesDefault (
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EFI_EVENT Event,
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VOID *Context
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)
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{
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EFI_STATUS Status;
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EFI_MEMORY_DESCRIPTOR *MemoryMap;
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UINTN MemoryMapSize;
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UINTN MapKey;
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UINTN DescriptorSize;
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UINT32 DescriptorVersion;
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EFI_PROPERTIES_TABLE *PropertiesTable;
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DEBUG ((EFI_D_INFO, "UpdateMemoryAttributesDefault\n"));
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Status = EfiGetSystemConfigurationTable (&gEfiPropertiesTableGuid, &PropertiesTable);
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if (EFI_ERROR (Status)) {
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goto Done;
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}
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DEBUG ((EFI_D_INFO, "MemoryProtectionAttribute - 0x%016lx\n", PropertiesTable->MemoryProtectionAttribute));
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if ((PropertiesTable->MemoryProtectionAttribute & EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA) == 0) {
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goto Done;
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}
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//
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// Get the EFI memory map.
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//
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MemoryMapSize = 0;
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MemoryMap = NULL;
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Status = gBS->GetMemoryMap (
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&MemoryMapSize,
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MemoryMap,
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&MapKey,
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&DescriptorSize,
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&DescriptorVersion
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);
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ASSERT (Status == EFI_BUFFER_TOO_SMALL);
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do {
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MemoryMap = (EFI_MEMORY_DESCRIPTOR *) AllocatePool (MemoryMapSize);
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ASSERT (MemoryMap != NULL);
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Status = gBS->GetMemoryMap (
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&MemoryMapSize,
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MemoryMap,
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&MapKey,
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&DescriptorSize,
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&DescriptorVersion
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);
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if (EFI_ERROR (Status)) {
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FreePool (MemoryMap);
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}
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} while (Status == EFI_BUFFER_TOO_SMALL);
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ASSERT_EFI_ERROR (Status);
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SetMemorySpaceAttributesDefault (MemoryMap, MemoryMapSize, DescriptorSize);
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Done:
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gBS->CloseEvent (Event);
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return ;
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}
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/**
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The entrypoint of properties table attribute driver.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@param SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS It always returns EFI_SUCCESS.
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**/
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EFI_STATUS
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EFIAPI
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InitializePropertiesTableAttributesDxe (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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EFI_EVENT ReadyToBootEvent;
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Status = gBS->CreateEventEx (
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EVT_NOTIFY_SIGNAL,
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TPL_CALLBACK,
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UpdateMemoryAttributesDefault,
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NULL,
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&gEfiEventReadyToBootGuid,
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&ReadyToBootEvent
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);
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ASSERT_EFI_ERROR (Status);
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return EFI_SUCCESS;
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}
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