tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/* Copyright (C) 2017-2018 ARM Limited */
3
4/*
5 * For use by other UAPI headers only.
6 * Do not make direct use of header or its definitions.
7 */
8
9#ifndef _UAPI__ASM_SVE_CONTEXT_H
10#define _UAPI__ASM_SVE_CONTEXT_H
11
12#include <linux/types.h>
13
14#define __SVE_VQ_BYTES 16 /* number of bytes per quadword */
15
16/*
17 * Yes, __SVE_VQ_MAX is 512 QUADWORDS.
18 *
19 * To help ensure forward portability, this is much larger than the
20 * current maximum value defined by the SVE architecture. While arrays
21 * or static allocations can be sized based on this value, watch out!
22 * It will waste a surprisingly large amount of memory.
23 *
24 * Dynamic sizing based on the actual runtime vector length is likely to
25 * be preferable for most purposes.
26 */
27#define __SVE_VQ_MIN 1
28#define __SVE_VQ_MAX 512
29
30#define __SVE_VL_MIN (__SVE_VQ_MIN * __SVE_VQ_BYTES)
31#define __SVE_VL_MAX (__SVE_VQ_MAX * __SVE_VQ_BYTES)
32
33#define __SVE_NUM_ZREGS 32
34#define __SVE_NUM_PREGS 16
35
36#define __sve_vl_valid(vl) \
37 ((vl) % __SVE_VQ_BYTES == 0 && \
38 (vl) >= __SVE_VL_MIN && \
39 (vl) <= __SVE_VL_MAX)
40
41#define __sve_vq_from_vl(vl) ((vl) / __SVE_VQ_BYTES)
42#define __sve_vl_from_vq(vq) ((vq) * __SVE_VQ_BYTES)
43
44#define __SVE_ZREG_SIZE(vq) ((__u32)(vq) * __SVE_VQ_BYTES)
45#define __SVE_PREG_SIZE(vq) ((__u32)(vq) * (__SVE_VQ_BYTES / 8))
46#define __SVE_FFR_SIZE(vq) __SVE_PREG_SIZE(vq)
47
48#define __SVE_ZREGS_OFFSET 0
49#define __SVE_ZREG_OFFSET(vq, n) \
50 (__SVE_ZREGS_OFFSET + __SVE_ZREG_SIZE(vq) * (n))
51#define __SVE_ZREGS_SIZE(vq) \
52 (__SVE_ZREG_OFFSET(vq, __SVE_NUM_ZREGS) - __SVE_ZREGS_OFFSET)
53
54#define __SVE_PREGS_OFFSET(vq) \
55 (__SVE_ZREGS_OFFSET + __SVE_ZREGS_SIZE(vq))
56#define __SVE_PREG_OFFSET(vq, n) \
57 (__SVE_PREGS_OFFSET(vq) + __SVE_PREG_SIZE(vq) * (n))
58#define __SVE_PREGS_SIZE(vq) \
59 (__SVE_PREG_OFFSET(vq, __SVE_NUM_PREGS) - __SVE_PREGS_OFFSET(vq))
60
61#define __SVE_FFR_OFFSET(vq) \
62 (__SVE_PREGS_OFFSET(vq) + __SVE_PREGS_SIZE(vq))
63
64#endif /* ! _UAPI__ASM_SVE_CONTEXT_H */