[mirror_edk2.git] / MdePkg / Library / BaseLib / X86SpeculationBarrier.c

/** @file\r
  SpeculationBarrier() function for IA32 and x64.\r
\r
  Copyright (C) 2018, Intel Corporation. All rights reserved.<BR>\r
\r
  This program and the accompanying materials are licensed and made available\r
  under the terms and conditions of the BSD License which accompanies this\r
  distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php.\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r
  WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include <Library/BaseLib.h>\r
\r
/**\r
  Uses as a barrier to stop speculative execution.\r
\r
  Ensures that no later instruction will execute speculatively, until all prior\r
  instructions have completed.\r
\r
**/\r
VOID\r
EFIAPI\r
SpeculationBarrier (\r
  VOID\r
  )\r
{\r
  AsmLfence ();\r
}\r
Commit	Line	Data
d9f1cac5 HW	1	/** @file\r
	2	SpeculationBarrier() function for IA32 and x64.\r
	3	\r
	4	Copyright (C) 2018, Intel Corporation. All rights reserved.<BR>\r
	5	\r
	6	This program and the accompanying materials are licensed and made available\r
	7	under the terms and conditions of the BSD License which accompanies this\r
	8	distribution. The full text of the license may be found at\r
	9	http://opensource.org/licenses/bsd-license.php.\r
	10	\r
	11	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r
	12	WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	13	\r
	14	**/\r
	15	\r
	16	#include <Library/BaseLib.h>\r
	17	\r
	18	/**\r
	19	Uses as a barrier to stop speculative execution.\r
	20	\r
	21	Ensures that no later instruction will execute speculatively, until all prior\r
	22	instructions have completed.\r
	23	\r
	24	**/\r
	25	VOID\r
	26	EFIAPI\r
	27	SpeculationBarrier (\r
	28	VOID\r
	29	)\r
	30	{\r
	31	AsmLfence ();\r
	32	}\r