blob: d9feadffa972dadf0e2dcf5804ac50f9827d6c07 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Common place for both 32- and 64-bit entry routines.
*/
#include <linux/export.h>
#include <linux/linkage.h>
#include <asm/msr-index.h>
#include <asm/unwind_hints.h>
#include <asm/segment.h>
#include <asm/cache.h>
#include "calling.h"
.pushsection .noinstr.text, "ax"
SYM_FUNC_START(entry_ibpb)
movl $MSR_IA32_PRED_CMD, %ecx
movl $PRED_CMD_IBPB, %eax
xorl %edx, %edx
wrmsr
RET
SYM_FUNC_END(entry_ibpb)
/* For KVM */
EXPORT_SYMBOL_GPL(entry_ibpb);
.popsection
/*
* Define the VERW operand that is disguised as entry code so that
* it can be referenced with KPTI enabled. This ensure VERW can be
* used late in exit-to-user path after page tables are switched.
*/
.pushsection .entry.text, "ax"
.align L1_CACHE_BYTES, 0xcc
SYM_CODE_START_NOALIGN(mds_verw_sel)
UNWIND_HINT_UNDEFINED
ANNOTATE_NOENDBR
.word __KERNEL_DS
.align L1_CACHE_BYTES, 0xcc
SYM_CODE_END(mds_verw_sel);
/* For KVM */
EXPORT_SYMBOL_GPL(mds_verw_sel);
.popsection
THUNK warn_thunk_thunk, __warn_thunk
|
