sve_helpers.h

 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