mirror of https://github.com/acidanthera/audk.git
Add SmmMemLib, which can be used by SMM driver or SMM core to check communication buffer.
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: "Yao, Jiewen" <jiewen.yao@intel.com> Reviewed-by: "Gao, Liming" <liming.gao@intel.com> Reviewed-by: "Fan, Jeff" <jeff.fan@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16693 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Yao, Jiewen
jyao1
parent
ab879e4cb3
commit
d425764e3f
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/** @file
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Provides services for SMM Memory Operation.
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The SMM Mem Library provides function for checking if buffer is outside SMRAM and valid.
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It also provides functions for copy data from SMRAM to non-SMRAM, from non-SMRAM to SMRAM,
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from non-SMRAM to non-SMRAM, or set data in non-SMRAM.
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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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#ifndef _SMM_MEM_LIB_H_
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#define _SMM_MEM_LIB_H_
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/**
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This function check if the buffer is valid per processor architecture and not overlap with SMRAM.
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@param Buffer The buffer start address to be checked.
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@param Length The buffer length to be checked.
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@retval TRUE This buffer is valid per processor architecture and not overlap with SMRAM.
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@retval FALSE This buffer is not valid per processor architecture or overlap with SMRAM.
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**/
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BOOLEAN
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EFIAPI
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SmmIsBufferOutsideSmmValid (
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IN EFI_PHYSICAL_ADDRESS Buffer,
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IN UINT64 Length
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);
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/**
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Copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
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This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
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It checks if source buffer is valid per processor architecture and not overlap with SMRAM.
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If the check passes, it copies memory and returns EFI_SUCCESS.
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If the check fails, it return EFI_SECURITY_VIOLATION.
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The implementation must be reentrant.
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@param DestinationBuffer The pointer to the destination buffer of the memory copy.
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@param SourceBuffer The pointer to the source buffer of the memory copy.
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@param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.
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@retval EFI_SECURITY_VIOLATION The SourceBuffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SUCCESS Memory is copied.
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**/
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EFI_STATUS
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EFIAPI
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SmmCopyMemToSmram (
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OUT VOID *DestinationBuffer,
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IN CONST VOID *SourceBuffer,
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IN UINTN Length
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);
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/**
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Copies a source buffer (SMRAM) to a destination buffer (NON-SMRAM).
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This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
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It checks if destination buffer is valid per processor architecture and not overlap with SMRAM.
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If the check passes, it copies memory and returns EFI_SUCCESS.
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If the check fails, it returns EFI_SECURITY_VIOLATION.
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The implementation must be reentrant.
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@param DestinationBuffer The pointer to the destination buffer of the memory copy.
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@param SourceBuffer The pointer to the source buffer of the memory copy.
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@param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.
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@retval EFI_SECURITY_VIOLATION The DesinationBuffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SUCCESS Memory is copied.
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**/
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EFI_STATUS
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EFIAPI
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SmmCopyMemFromSmram (
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OUT VOID *DestinationBuffer,
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IN CONST VOID *SourceBuffer,
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IN UINTN Length
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);
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/**
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Copies a source buffer (NON-SMRAM) to a destination buffer (NON-SMRAM).
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This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
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It checks if source buffer and destination buffer are valid per processor architecture and not overlap with SMRAM.
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If the check passes, it copies memory and returns EFI_SUCCESS.
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If the check fails, it returns EFI_SECURITY_VIOLATION.
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The implementation must be reentrant, and it must handle the case where source buffer overlaps destination buffer.
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@param DestinationBuffer The pointer to the destination buffer of the memory copy.
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@param SourceBuffer The pointer to the source buffer of the memory copy.
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@param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.
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@retval EFI_SECURITY_VIOLATION The DesinationBuffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SECURITY_VIOLATION The SourceBuffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SUCCESS Memory is copied.
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**/
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EFI_STATUS
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EFIAPI
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SmmCopyMem (
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OUT VOID *DestinationBuffer,
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IN CONST VOID *SourceBuffer,
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IN UINTN Length
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);
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/**
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Fills a target buffer (NON-SMRAM) with a byte value.
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This function fills a target buffer (non-SMRAM) with a byte value.
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It checks if target buffer is valid per processor architecture and not overlap with SMRAM.
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If the check passes, it fills memory and returns EFI_SUCCESS.
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If the check fails, it returns EFI_SECURITY_VIOLATION.
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@param Buffer The memory to set.
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@param Length The number of bytes to set.
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@param Value The value with which to fill Length bytes of Buffer.
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@retval EFI_SECURITY_VIOLATION The Buffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SUCCESS Memory is set.
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**/
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EFI_STATUS
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EFIAPI
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SmmSetMem (
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OUT VOID *Buffer,
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IN UINTN Length,
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IN UINT8 Value
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);
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#endif
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/** @file
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Instance of SMM memory check library.
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SMM memory check library library implementation. This library consumes SMM_ACCESS2_PROTOCOL
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to get SMRAM information. In order to use this library instance, the platform should produce
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all SMRAM range via SMM_ACCESS2_PROTOCOL, including the range for firmware (like SMM Core
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and SMM driver) and/or specific dedicated hardware.
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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 <PiSmm.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/SmmServicesTableLib.h>
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#include <Library/HobLib.h>
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#include <Protocol/SmmAccess2.h>
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EFI_SMRAM_DESCRIPTOR *mSmmMemLibInternalSmramRanges;
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UINTN mSmmMemLibInternalSmramCount;
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//
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// Maximum support address used to check input buffer
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//
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EFI_PHYSICAL_ADDRESS mSmmMemLibInternalMaximumSupportAddress = 0;
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/**
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Caculate and save the maximum support address.
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**/
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VOID
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SmmMemLibInternalCaculateMaximumSupportAddress (
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VOID
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)
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{
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VOID *Hob;
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UINT32 RegEax;
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UINT8 PhysicalAddressBits;
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//
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// Get physical address bits supported.
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//
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Hob = GetFirstHob (EFI_HOB_TYPE_CPU);
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if (Hob != NULL) {
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PhysicalAddressBits = ((EFI_HOB_CPU *) Hob)->SizeOfMemorySpace;
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} else {
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AsmCpuid (0x80000000, &RegEax, NULL, NULL, NULL);
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if (RegEax >= 0x80000008) {
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AsmCpuid (0x80000008, &RegEax, NULL, NULL, NULL);
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PhysicalAddressBits = (UINT8) RegEax;
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} else {
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PhysicalAddressBits = 36;
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}
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}
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//
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// IA-32e paging translates 48-bit linear addresses to 52-bit physical addresses.
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//
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ASSERT (PhysicalAddressBits <= 52);
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if (PhysicalAddressBits > 48) {
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PhysicalAddressBits = 48;
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}
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//
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// Save the maximum support address in one global variable
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//
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mSmmMemLibInternalMaximumSupportAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)(LShiftU64 (1, PhysicalAddressBits) - 1);
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DEBUG ((EFI_D_INFO, "mSmmMemLibInternalMaximumSupportAddress = 0x%lx\n", mSmmMemLibInternalMaximumSupportAddress));
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}
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/**
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This function check if the buffer is valid per processor architecture and not overlap with SMRAM.
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@param Buffer The buffer start address to be checked.
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@param Length The buffer length to be checked.
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@retval TRUE This buffer is valid per processor architecture and not overlap with SMRAM.
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@retval FALSE This buffer is not valid per processor architecture or overlap with SMRAM.
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**/
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BOOLEAN
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EFIAPI
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SmmIsBufferOutsideSmmValid (
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IN EFI_PHYSICAL_ADDRESS Buffer,
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IN UINT64 Length
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)
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{
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UINTN Index;
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//
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// Check override.
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// NOTE: (B:0->L:4G) is invalid for IA32, but (B:1->L:4G-1)/(B:4G-1->L:1) is valid.
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//
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if ((Length > mSmmMemLibInternalMaximumSupportAddress) ||
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(Buffer > mSmmMemLibInternalMaximumSupportAddress) ||
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((Length != 0) && (Buffer > (mSmmMemLibInternalMaximumSupportAddress - (Length - 1)))) ) {
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//
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// Overflow happen
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//
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DEBUG ((
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EFI_D_ERROR,
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"SmmIsBufferOutsideSmmValid: Overflow: Buffer (0x%lx) - Length (0x%lx), MaximumSupportAddress (0x%lx)\n",
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Buffer,
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Length,
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mSmmMemLibInternalMaximumSupportAddress
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));
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return FALSE;
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}
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for (Index = 0; Index < mSmmMemLibInternalSmramCount; Index ++) {
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if (((Buffer >= mSmmMemLibInternalSmramRanges[Index].CpuStart) && (Buffer < mSmmMemLibInternalSmramRanges[Index].CpuStart + mSmmMemLibInternalSmramRanges[Index].PhysicalSize)) ||
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((mSmmMemLibInternalSmramRanges[Index].CpuStart >= Buffer) && (mSmmMemLibInternalSmramRanges[Index].CpuStart < Buffer + Length))) {
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DEBUG ((
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EFI_D_ERROR,
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"SmmIsBufferOutsideSmmValid: Overlap: Buffer (0x%lx) - Length (0x%lx), ",
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Buffer,
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Length
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));
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DEBUG ((
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EFI_D_ERROR,
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"CpuStart (0x%lx) - PhysicalSize (0x%lx)\n",
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mSmmMemLibInternalSmramRanges[Index].CpuStart,
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mSmmMemLibInternalSmramRanges[Index].PhysicalSize
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));
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return FALSE;
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}
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}
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return TRUE;
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}
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/**
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Copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
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This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
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It checks if source buffer is valid per processor architecture and not overlap with SMRAM.
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If the check passes, it copies memory and returns EFI_SUCCESS.
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If the check fails, it return EFI_SECURITY_VIOLATION.
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The implementation must be reentrant.
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@param DestinationBuffer The pointer to the destination buffer of the memory copy.
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@param SourceBuffer The pointer to the source buffer of the memory copy.
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@param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.
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@retval EFI_SECURITY_VIOLATION The SourceBuffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SUCCESS Memory is copied.
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**/
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EFI_STATUS
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EFIAPI
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SmmCopyMemToSmram (
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OUT VOID *DestinationBuffer,
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IN CONST VOID *SourceBuffer,
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IN UINTN Length
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)
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{
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if (!SmmIsBufferOutsideSmmValid ((EFI_PHYSICAL_ADDRESS)(UINTN)SourceBuffer, Length)) {
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DEBUG ((EFI_D_ERROR, "SmmCopyMemToSmram: Security Violation: Source (0x%x), Length (0x%x)\n", SourceBuffer, Length));
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return EFI_SECURITY_VIOLATION;
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}
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CopyMem (DestinationBuffer, SourceBuffer, Length);
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return EFI_SUCCESS;
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}
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/**
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Copies a source buffer (SMRAM) to a destination buffer (NON-SMRAM).
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This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
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It checks if destination buffer is valid per processor architecture and not overlap with SMRAM.
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If the check passes, it copies memory and returns EFI_SUCCESS.
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If the check fails, it returns EFI_SECURITY_VIOLATION.
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The implementation must be reentrant.
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@param DestinationBuffer The pointer to the destination buffer of the memory copy.
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@param SourceBuffer The pointer to the source buffer of the memory copy.
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@param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.
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@retval EFI_SECURITY_VIOLATION The DesinationBuffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SUCCESS Memory is copied.
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**/
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EFI_STATUS
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EFIAPI
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SmmCopyMemFromSmram (
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OUT VOID *DestinationBuffer,
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IN CONST VOID *SourceBuffer,
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IN UINTN Length
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)
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{
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if (!SmmIsBufferOutsideSmmValid ((EFI_PHYSICAL_ADDRESS)(UINTN)DestinationBuffer, Length)) {
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DEBUG ((EFI_D_ERROR, "SmmCopyMemFromSmram: Security Violation: Destination (0x%x), Length (0x%x)\n", DestinationBuffer, Length));
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return EFI_SECURITY_VIOLATION;
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}
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CopyMem (DestinationBuffer, SourceBuffer, Length);
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return EFI_SUCCESS;
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}
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/**
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Copies a source buffer (NON-SMRAM) to a destination buffer (NON-SMRAM).
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This function copies a source buffer (non-SMRAM) to a destination buffer (SMRAM).
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It checks if source buffer and destination buffer are valid per processor architecture and not overlap with SMRAM.
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If the check passes, it copies memory and returns EFI_SUCCESS.
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If the check fails, it returns EFI_SECURITY_VIOLATION.
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The implementation must be reentrant, and it must handle the case where source buffer overlaps destination buffer.
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@param DestinationBuffer The pointer to the destination buffer of the memory copy.
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@param SourceBuffer The pointer to the source buffer of the memory copy.
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@param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.
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@retval EFI_SECURITY_VIOLATION The DesinationBuffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SECURITY_VIOLATION The SourceBuffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SUCCESS Memory is copied.
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**/
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EFI_STATUS
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EFIAPI
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SmmCopyMem (
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OUT VOID *DestinationBuffer,
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IN CONST VOID *SourceBuffer,
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IN UINTN Length
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)
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{
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if (!SmmIsBufferOutsideSmmValid ((EFI_PHYSICAL_ADDRESS)(UINTN)DestinationBuffer, Length)) {
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DEBUG ((EFI_D_ERROR, "SmmCopyMem: Security Violation: Destination (0x%x), Length (0x%x)\n", DestinationBuffer, Length));
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return EFI_SECURITY_VIOLATION;
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}
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if (!SmmIsBufferOutsideSmmValid ((EFI_PHYSICAL_ADDRESS)(UINTN)SourceBuffer, Length)) {
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DEBUG ((EFI_D_ERROR, "SmmCopyMem: Security Violation: Source (0x%x), Length (0x%x)\n", SourceBuffer, Length));
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return EFI_SECURITY_VIOLATION;
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}
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CopyMem (DestinationBuffer, SourceBuffer, Length);
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return EFI_SUCCESS;
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}
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/**
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Fills a target buffer (NON-SMRAM) with a byte value.
|
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|
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This function fills a target buffer (non-SMRAM) with a byte value.
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It checks if target buffer is valid per processor architecture and not overlap with SMRAM.
|
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If the check passes, it fills memory and returns EFI_SUCCESS.
|
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If the check fails, it returns EFI_SECURITY_VIOLATION.
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@param Buffer The memory to set.
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@param Length The number of bytes to set.
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@param Value The value with which to fill Length bytes of Buffer.
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@retval EFI_SECURITY_VIOLATION The Buffer is invalid per processor architecture or overlap with SMRAM.
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@retval EFI_SUCCESS Memory is set.
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**/
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EFI_STATUS
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EFIAPI
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SmmSetMem (
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OUT VOID *Buffer,
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IN UINTN Length,
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IN UINT8 Value
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)
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{
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if (!SmmIsBufferOutsideSmmValid ((EFI_PHYSICAL_ADDRESS)(UINTN)Buffer, Length)) {
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DEBUG ((EFI_D_ERROR, "SmmSetMem: Security Violation: Source (0x%x), Length (0x%x)\n", Buffer, Length));
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return EFI_SECURITY_VIOLATION;
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}
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SetMem (Buffer, Length, Value);
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return EFI_SUCCESS;
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}
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/**
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The constructor function initializes the Smm Mem library
|
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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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|
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@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
|
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|
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**/
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EFI_STATUS
|
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EFIAPI
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SmmMemLibConstructor (
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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_SMM_ACCESS2_PROTOCOL *SmmAccess;
|
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UINTN Size;
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//
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// Get SMRAM information
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//
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Status = gBS->LocateProtocol (&gEfiSmmAccess2ProtocolGuid, NULL, (VOID **)&SmmAccess);
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ASSERT_EFI_ERROR (Status);
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Size = 0;
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Status = SmmAccess->GetCapabilities (SmmAccess, &Size, NULL);
|
||||
ASSERT (Status == EFI_BUFFER_TOO_SMALL);
|
||||
|
||||
mSmmMemLibInternalSmramRanges = AllocatePool (Size);
|
||||
ASSERT (mSmmMemLibInternalSmramRanges != NULL);
|
||||
|
||||
Status = SmmAccess->GetCapabilities (SmmAccess, &Size, mSmmMemLibInternalSmramRanges);
|
||||
ASSERT_EFI_ERROR (Status);
|
||||
|
||||
mSmmMemLibInternalSmramCount = Size / sizeof (EFI_SMRAM_DESCRIPTOR);
|
||||
|
||||
//
|
||||
// Caculate and save maximum support address
|
||||
//
|
||||
SmmMemLibInternalCaculateMaximumSupportAddress ();
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
The destructor function frees resource used in the Smm Mem library
|
||||
|
||||
@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 deconstructor always returns EFI_SUCCESS.
|
||||
**/
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
SmmMemLibDestructor (
|
||||
IN EFI_HANDLE ImageHandle,
|
||||
IN EFI_SYSTEM_TABLE *SystemTable
|
||||
)
|
||||
{
|
||||
FreePool (mSmmMemLibInternalSmramRanges);
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
|
@ -0,0 +1,53 @@
|
|||
## @file
|
||||
# Instance of SMM memory check library.
|
||||
#
|
||||
# SMM memory check library library implementation. This library consumes SMM_ACCESS2_PROTOCOL
|
||||
# to get SMRAM information. In order to use this library instance, the platform should produce
|
||||
# all SMRAM range via SMM_ACCESS2_PROTOCOL, including the range for firmware (like SMM Core
|
||||
# and SMM driver) and/or specific dedicated hardware.
|
||||
#
|
||||
# Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
|
||||
# This program and the accompanying materials
|
||||
# are licensed and made available under the terms and conditions of the BSD License
|
||||
# which accompanies this distribution. The full text of the license may be found at
|
||||
# http://opensource.org/licenses/bsd-license.php
|
||||
#
|
||||
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
||||
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
||||
#
|
||||
##
|
||||
|
||||
[Defines]
|
||||
INF_VERSION = 0x00010005
|
||||
BASE_NAME = SmmMemLib
|
||||
MODULE_UNI_FILE = SmmMemLib.uni
|
||||
FILE_GUID = 7F23F839-C81C-4B89-8132-69746FCBCE52
|
||||
MODULE_TYPE = DXE_SMM_DRIVER
|
||||
VERSION_STRING = 1.0
|
||||
LIBRARY_CLASS = SmmMemLib|DXE_SMM_DRIVER SMM_CORE
|
||||
CONSTRUCTOR = SmmMemLibConstructor
|
||||
DESTRUCTOR = SmmMemLibDestructor
|
||||
|
||||
#
|
||||
# The following information is for reference only and not required by the build tools.
|
||||
#
|
||||
# VALID_ARCHITECTURES = IA32 X64
|
||||
#
|
||||
|
||||
[Sources]
|
||||
SmmMemLib.c
|
||||
|
||||
[Packages]
|
||||
MdePkg/MdePkg.dec
|
||||
MdeModulePkg/MdeModulePkg.dec
|
||||
|
||||
[LibraryClasses]
|
||||
SmmServicesTableLib
|
||||
UefiBootServicesTableLib
|
||||
DebugLib
|
||||
BaseMemoryLib
|
||||
HobLib
|
||||
MemoryAllocationLib
|
||||
|
||||
[Protocols]
|
||||
gEfiSmmAccess2ProtocolGuid
|
||||
Binary file not shown.
|
|
@ -238,6 +238,10 @@
|
|||
# Only available to SMM/DXE Combined and SMM module types.
|
||||
SmmServicesTableLib|Include/Library/SmmServicesTableLib.h
|
||||
|
||||
## @libraryclass Provides services for Smm Memory Operation.
|
||||
#
|
||||
SmmMemLib|Include/Library/SmmMemLib.h
|
||||
|
||||
## @libraryclass Provides services to enable/disable periodic SMI handlers.
|
||||
#
|
||||
SmmPeriodicSmiLib|Include/Library/SmmPeriodicSmiLib.h
|
||||
|
|
|
|||
|
|
@ -150,6 +150,7 @@
|
|||
MdePkg/Library/BaseS3PciLib/BaseS3PciLib.inf
|
||||
MdePkg/Library/BaseS3SmbusLib/BaseS3SmbusLib.inf
|
||||
MdePkg/Library/BaseS3StallLib/BaseS3StallLib.inf
|
||||
MdePkg/Library/SmmMemLib/SmmMemLib.inf
|
||||
|
||||
[Components.IPF]
|
||||
MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsic.inf
|
||||
|
|
|
|||
Loading…
Reference in New Issue