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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/fpsimd.h
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@@ -1,4 +1,4 @@
/* fpsimd.h COPYRIGHT FUJITSU LIMITED 2016-2017 */
/* fpsimd.h COPYRIGHT FUJITSU LIMITED 2016-2019 */
#ifndef __HEADER_ARM64_COMMON_FPSIMD_H
#define __HEADER_ARM64_COMMON_FPSIMD_H
@@ -46,12 +46,15 @@ extern void sve_alloc(struct thread *thread);
extern void sve_save_state(void *state, unsigned int *pfpsr);
extern void sve_load_state(void const *state, unsigned int const *pfpsr, unsigned long vq_minus_1);
extern unsigned int sve_get_vl(void);
extern int sve_set_thread_vl(struct thread *thread, const unsigned long vector_length, const unsigned long flags);
extern int sve_get_thread_vl(const struct thread *thread);
extern int sve_set_thread_vl(unsigned long arg);
extern int sve_get_thread_vl(void);
extern int sve_set_vector_length(struct thread *thread, unsigned long vl, unsigned long flags);
#define SVE_SET_VL(thread, vector_length, flags) sve_set_thread_vl(thread, vector_length, flags)
#define SVE_GET_VL(thread) sve_get_thread_vl(thread)
#define SVE_SET_VL(arg) sve_set_thread_vl(arg)
#define SVE_GET_VL() sve_get_thread_vl()
/* Maximum VL that SVE VL-agnostic software can transparently support */
#define SVE_VL_ARCH_MAX 0x100
#else /* CONFIG_ARM64_SVE */
@@ -80,12 +83,12 @@ static int sve_set_vector_length(struct thread *thread, unsigned long vl, unsign
}
/* for prctl syscall */
#define SVE_SET_VL(a,b,c) (-EINVAL)
#define SVE_GET_VL(a) (-EINVAL)
#define SVE_SET_VL(a) (-EINVAL)
#define SVE_GET_VL() (-EINVAL)
#endif /* CONFIG_ARM64_SVE */
extern void init_sve_vl(void);
extern void sve_setup(void);
extern void fpsimd_save_state(struct fpsimd_state *state);
extern void fpsimd_load_state(struct fpsimd_state *state);
extern void thread_fpsimd_save(struct thread *thread);