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ACPI: EC: Evaluate orphan _REG under EC device
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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 #include "calling.h"
14
15 .pushsection .noinstr.text, "ax"
16
17 SYM_FUNC_START(entry_ibpb)
18         movl    $MSR_IA32_PRED_CMD, %ecx
19         movl    $PRED_CMD_IBPB, %eax
20         xorl    %edx, %edx
21         wrmsr
22         RET
23 SYM_FUNC_END(entry_ibpb)
24 /* For KVM */
25 EXPORT_SYMBOL_GPL(entry_ibpb);
26
27 .popsection
28
29 /*
30  * Define the VERW operand that is disguised as entry code so that
31  * it can be referenced with KPTI enabled. This ensure VERW can be
32  * used late in exit-to-user path after page tables are switched.
33  */
34 .pushsection .entry.text, "ax"
35
36 .align L1_CACHE_BYTES, 0xcc
37 SYM_CODE_START_NOALIGN(mds_verw_sel)
38         UNWIND_HINT_UNDEFINED
39         ANNOTATE_NOENDBR
40         .word __KERNEL_DS
41 .align L1_CACHE_BYTES, 0xcc
42 SYM_CODE_END(mds_verw_sel);
43 /* For KVM */
44 EXPORT_SYMBOL_GPL(mds_verw_sel);
45
46 .popsection
47
48 THUNK warn_thunk_thunk, __warn_thunk
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