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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2024 ARM Limited
4 *
5 * Common helper functions for SVE and SME functionality.
6 */
7
8#ifndef __SVE_HELPERS_H__
9#define __SVE_HELPERS_H__
10
11#include <stdbool.h>
12
13#define VLS_USE_SVE false
14#define VLS_USE_SME true
15
16extern unsigned int vls[];
17extern unsigned int nvls;
18
19int sve_fill_vls(bool use_sme, int min_vls);
20
21static inline uint64_t get_svcr(void)
22{
23 uint64_t val;
24
25 asm volatile (
26 "mrs %0, S3_3_C4_C2_2\n"
27 : "=r"(val)
28 :
29 : "cc");
30
31 return val;
32}
33
34#endif