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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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19
arch/arm64/kernel/include/prctl.h
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@@ -1,4 +1,4 @@
/* prctl.h COPYRIGHT FUJITSU LIMITED 2017 */
/* prctl.h COPYRIGHT FUJITSU LIMITED 2017-2019 */
#ifndef __HEADER_ARM64_COMMON_PRCTL_H
#define __HEADER_ARM64_COMMON_PRCTL_H
@@ -6,15 +6,12 @@
#define PR_GET_THP_DISABLE 42
/* arm64 Scalable Vector Extension controls */
#define PR_SVE_SET_VL 48 /* set task vector length */
#define PR_SVE_SET_VL_THREAD (1 << 1) /* set just this thread */
#define PR_SVE_SET_VL_INHERIT (1 << 2) /* inherit across exec */
#define PR_SVE_SET_VL_ONEXEC (1 << 3) /* defer effect until exec */
#define PR_SVE_GET_VL 49 /* get task vector length */
/* Decode helpers for the return value from PR_SVE_GET_VL: */
#define PR_SVE_GET_VL_LEN(ret) ((ret) & 0x3fff) /* vector length */
#define PR_SVE_GET_VL_INHERIT (PR_SVE_SET_VL_INHERIT << 16)
/* For conveinence, PR_SVE_SET_VL returns the result in the same encoding */
/* Flag values must be kept in sync with ptrace NT_ARM_SVE interface */
#define PR_SVE_SET_VL 50 /* set task vector length */
# define PR_SVE_SET_VL_ONEXEC (1 << 18) /* defer effect until exec */
#define PR_SVE_GET_VL 51 /* get task vector length */
/* Bits common to PR_SVE_SET_VL and PR_SVE_GET_VL */
# define PR_SVE_VL_LEN_MASK 0xffff
# define PR_SVE_VL_INHERIT (1 << 17) /* inherit across exec */
#endif /* !__HEADER_ARM64_COMMON_PRCTL_H */