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arm64: Scalable Vector Extension (SVE) support.

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Change-Id: I3568687913f583edfaa297d5cf5ac91d319d97e9
This commit is contained in:
Shiratori, Takehiro
2019-02-21 11:29:33 +09:00
committed by Masamichi Takagi
parent dac99f708c
commit 07aa96ef95
15 changed files with 490 additions and 223 deletions
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29
arch/arm64/kernel/include/signal.h
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@ -1,4 +1,4 @@
/* signal.h COPYRIGHT FUJITSU LIMITED 2015-2018 */
/* signal.h COPYRIGHT FUJITSU LIMITED 2015-2019 */
#ifndef __HEADER_ARM64_COMMON_SIGNAL_H
#define __HEADER_ARM64_COMMON_SIGNAL_H
@ -298,6 +298,7 @@ struct extra_context {
struct _aarch64_ctx head;
void *data; /* 16-byte aligned pointer to the extra space */
uint32_t size; /* size in bytes of the extra space */
uint32_t __reserved[3];
};
#define SVE_MAGIC 0x53564501
@ -318,19 +319,25 @@ struct sve_context {
* The SVE architecture leaves space for future expansion of the
* vector length beyond its initial architectural limit of 2048 bits
* (16 quadwords).
*
* See linux/Documentation/arm64/sve.txt for a description of the VL/VQ
* terminology.
*/
#define SVE_VQ_MIN 1
#define SVE_VQ_MAX 0x200
#define SVE_VQ_BYTES 16 /* number of bytes per quadword */
#define SVE_VL_MIN (SVE_VQ_MIN * 0x10)
#define SVE_VL_MAX (SVE_VQ_MAX * 0x10)
#define SVE_VQ_MIN 1
#define SVE_VQ_MAX 512
#define SVE_VL_MIN (SVE_VQ_MIN * SVE_VQ_BYTES)
#define SVE_VL_MAX (SVE_VQ_MAX * SVE_VQ_BYTES)
#define SVE_NUM_ZREGS 32
#define SVE_NUM_PREGS 16
#define sve_vl_valid(vl) \
((vl) % 0x10 == 0 && (vl) >= SVE_VL_MIN && (vl) <= SVE_VL_MAX)
#define sve_vq_from_vl(vl) ((vl) / 0x10)
((vl) % SVE_VQ_BYTES == 0 && (vl) >= SVE_VL_MIN && (vl) <= SVE_VL_MAX)
#define sve_vq_from_vl(vl) ((vl) / SVE_VQ_BYTES)
#define sve_vl_from_vq(vq) ((vq) * SVE_VQ_BYTES)
/*
* The total size of meaningful data in the SVE context in bytes,
@ -365,11 +372,13 @@ struct sve_context {
* Additional data might be appended in the future.
*/
#define SVE_SIG_ZREG_SIZE(vq) ((uint32_t)(vq) * 16)
#define SVE_SIG_PREG_SIZE(vq) ((uint32_t)(vq) * 2)
#define SVE_SIG_ZREG_SIZE(vq) ((uint32_t)(vq) * SVE_VQ_BYTES)
#define SVE_SIG_PREG_SIZE(vq) ((uint32_t)(vq) * (SVE_VQ_BYTES / 8))
#define SVE_SIG_FFR_SIZE(vq) SVE_SIG_PREG_SIZE(vq)
#define SVE_SIG_REGS_OFFSET ((sizeof(struct sve_context) + 15) / 16 * 16)
#define SVE_SIG_REGS_OFFSET \
((sizeof(struct sve_context) + (SVE_VQ_BYTES - 1)) \
/ SVE_VQ_BYTES * SVE_VQ_BYTES)
#define SVE_SIG_ZREGS_OFFSET SVE_SIG_REGS_OFFSET
#define SVE_SIG_ZREG_OFFSET(vq, n) \