[linux-block.git] / arch / x86 / include / asm / spec-ctrl.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_SPECCTRL_H_
#define _ASM_X86_SPECCTRL_H_

#include <asm/nospec-branch.h>

/*
 * On VMENTER we must preserve whatever view of the SPEC_CTRL MSR
 * the guest has, while on VMEXIT we restore the host view. This
 * would be easier if SPEC_CTRL were architecturally maskable or
 * shadowable for guests but this is not (currently) the case.
 * Takes the guest view of SPEC_CTRL MSR as a parameter.
 */
extern void x86_spec_ctrl_set_guest(u64);
extern void x86_spec_ctrl_restore_host(u64);

/* AMD specific Speculative Store Bypass MSR data */
extern u64 x86_amd_ls_cfg_base;
extern u64 x86_amd_ls_cfg_rds_mask;

#endif
Commit	Line	Data
28a27752 TG	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef _ASM_X86_SPECCTRL_H_
	3	#define _ASM_X86_SPECCTRL_H_
	4
	5	#include <asm/nospec-branch.h>
	6
	7	/*
	8	* On VMENTER we must preserve whatever view of the SPEC_CTRL MSR
	9	* the guest has, while on VMEXIT we restore the host view. This
	10	* would be easier if SPEC_CTRL were architecturally maskable or
	11	* shadowable for guests but this is not (currently) the case.
	12	* Takes the guest view of SPEC_CTRL MSR as a parameter.
	13	*/
	14	extern void x86_spec_ctrl_set_guest(u64);
	15	extern void x86_spec_ctrl_restore_host(u64);
	16
	17	/* AMD specific Speculative Store Bypass MSR data */
	18	extern u64 x86_amd_ls_cfg_base;
	19	extern u64 x86_amd_ls_cfg_rds_mask;
	20
	21	#endif