1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Common place for both 32- and 64-bit entry routines.
 4 */
 5
 
 6#include <linux/linkage.h>
 7#include <asm/export.h>
 8#include <asm/msr-index.h>
 
 
 
 9
10.pushsection .noinstr.text, "ax"
11
12SYM_FUNC_START(entry_ibpb)
13	movl	$MSR_IA32_PRED_CMD, %ecx
14	movl	$PRED_CMD_IBPB, %eax
15	xorl	%edx, %edx
16	wrmsr
17	RET
18SYM_FUNC_END(entry_ibpb)
19/* For KVM */
20EXPORT_SYMBOL_GPL(entry_ibpb);
21
22.popsection

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Common place for both 32- and 64-bit entry routines.
 4 */
 5
 6#include <linux/export.h>
 7#include <linux/linkage.h>
 
 8#include <asm/msr-index.h>
 9#include <asm/unwind_hints.h>
10#include <asm/segment.h>
11#include <asm/cache.h>
12
13.pushsection .noinstr.text, "ax"
14
15SYM_FUNC_START(entry_ibpb)
16	movl	$MSR_IA32_PRED_CMD, %ecx
17	movl	$PRED_CMD_IBPB, %eax
18	xorl	%edx, %edx
19	wrmsr
20	RET
21SYM_FUNC_END(entry_ibpb)
22/* For KVM */
23EXPORT_SYMBOL_GPL(entry_ibpb);
24
25.popsection
26
27/*
28 * Define the VERW operand that is disguised as entry code so that
29 * it can be referenced with KPTI enabled. This ensure VERW can be
30 * used late in exit-to-user path after page tables are switched.
31 */
32.pushsection .entry.text, "ax"
33
34.align L1_CACHE_BYTES, 0xcc
35SYM_CODE_START_NOALIGN(mds_verw_sel)
36	UNWIND_HINT_UNDEFINED
37	ANNOTATE_NOENDBR
38	.word __KERNEL_DS
39.align L1_CACHE_BYTES, 0xcc
40SYM_CODE_END(mds_verw_sel);
41/* For KVM */
42EXPORT_SYMBOL_GPL(mds_verw_sel);
43
44.popsection
45