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MdeModulePkg/VarCheckPolicyLib: implement standalone MM version

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This commit adds the VarCheckPolicyLib that will be able to
execute in the context of standalone MM.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Co-authored-by: Kun Qin <kun.q@outlook.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Supreeth Venkatesh <supreeth.venkatesh@arm.com>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
This commit is contained in:
Masahisa Kojima
2020-12-21 14:17:34 +08:00
committed by mergify[bot]
parent d15d0d3d8a
commit e2747dbb5a
7 changed files with 199 additions and 10 deletions
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14
MdeModulePkg/Library/VarCheckPolicyLib/VarCheckPolicyLib.c
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@ -12,7 +12,6 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
#include <Library/DebugLib.h>
#include <Library/SafeIntLib.h>
#include <Library/MmServicesTableLib.h>
#include <Library/SmmMemLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
@ -23,6 +22,8 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
#include <Guid/VarCheckPolicyMmi.h>
#include "VarCheckPolicyLib.h"
//================================================
// As a VarCheck library, we're linked into the VariableServices
// and may not be able to call them indirectly. To get around this,
@ -102,7 +103,8 @@ VarCheckPolicyLibMmiHandler (
// Make sure that the buffer does not overlap SMM.
// This should be covered by the SmiManage infrastructure, but just to be safe...
InternalCommBufferSize = *CommBufferSize;
if (InternalCommBufferSize > VAR_CHECK_POLICY_MM_COMM_BUFFER_SIZE || !SmmIsBufferOutsideSmmValid((UINTN)CommBuffer, (UINT64)InternalCommBufferSize)) {
if (InternalCommBufferSize > VAR_CHECK_POLICY_MM_COMM_BUFFER_SIZE ||
!VarCheckPolicyIsBufferOutsideValid((UINTN)CommBuffer, (UINT64)InternalCommBufferSize)) {
DEBUG ((DEBUG_ERROR, "%a - Invalid CommBuffer supplied! 0x%016lX[0x%016lX]\n", __FUNCTION__, CommBuffer, InternalCommBufferSize));
return EFI_INVALID_PARAMETER;
}
@ -305,17 +307,13 @@ VarCheckPolicyLibMmiHandler (
Constructor function of VarCheckPolicyLib to register VarCheck handler and
SW MMI handlers.
@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 constructor executed correctly.
**/
EFI_STATUS
EFIAPI
VarCheckPolicyLibConstructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
VarCheckPolicyLibCommonConstructor (
VOID
)
{
EFI_STATUS Status;