1d9cb4336SCornelia Huck /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2d9cb4336SCornelia Huck /* Copyright (C) 2017-2018 ARM Limited */ 3d9cb4336SCornelia Huck 4d9cb4336SCornelia Huck /* 5d9cb4336SCornelia Huck * For use by other UAPI headers only. 6d9cb4336SCornelia Huck * Do not make direct use of header or its definitions. 7d9cb4336SCornelia Huck */ 8d9cb4336SCornelia Huck 9d9cb4336SCornelia Huck #ifndef __ASM_SVE_CONTEXT_H 10d9cb4336SCornelia Huck #define __ASM_SVE_CONTEXT_H 11d9cb4336SCornelia Huck 12d9cb4336SCornelia Huck #include <linux/types.h> 13d9cb4336SCornelia Huck 14d9cb4336SCornelia Huck #define __SVE_VQ_BYTES 16 /* number of bytes per quadword */ 15d9cb4336SCornelia Huck 16*ab0c7fb2SPaolo Bonzini /* 17*ab0c7fb2SPaolo Bonzini * Yes, __SVE_VQ_MAX is 512 QUADWORDS. 18*ab0c7fb2SPaolo Bonzini * 19*ab0c7fb2SPaolo Bonzini * To help ensure forward portability, this is much larger than the 20*ab0c7fb2SPaolo Bonzini * current maximum value defined by the SVE architecture. While arrays 21*ab0c7fb2SPaolo Bonzini * or static allocations can be sized based on this value, watch out! 22*ab0c7fb2SPaolo Bonzini * It will waste a surprisingly large amount of memory. 23*ab0c7fb2SPaolo Bonzini * 24*ab0c7fb2SPaolo Bonzini * Dynamic sizing based on the actual runtime vector length is likely to 25*ab0c7fb2SPaolo Bonzini * be preferable for most purposes. 26*ab0c7fb2SPaolo Bonzini */ 27d9cb4336SCornelia Huck #define __SVE_VQ_MIN 1 28d9cb4336SCornelia Huck #define __SVE_VQ_MAX 512 29d9cb4336SCornelia Huck 30d9cb4336SCornelia Huck #define __SVE_VL_MIN (__SVE_VQ_MIN * __SVE_VQ_BYTES) 31d9cb4336SCornelia Huck #define __SVE_VL_MAX (__SVE_VQ_MAX * __SVE_VQ_BYTES) 32d9cb4336SCornelia Huck 33d9cb4336SCornelia Huck #define __SVE_NUM_ZREGS 32 34d9cb4336SCornelia Huck #define __SVE_NUM_PREGS 16 35d9cb4336SCornelia Huck 36d9cb4336SCornelia Huck #define __sve_vl_valid(vl) \ 37d9cb4336SCornelia Huck ((vl) % __SVE_VQ_BYTES == 0 && \ 38d9cb4336SCornelia Huck (vl) >= __SVE_VL_MIN && \ 39d9cb4336SCornelia Huck (vl) <= __SVE_VL_MAX) 40d9cb4336SCornelia Huck 41d9cb4336SCornelia Huck #define __sve_vq_from_vl(vl) ((vl) / __SVE_VQ_BYTES) 42d9cb4336SCornelia Huck #define __sve_vl_from_vq(vq) ((vq) * __SVE_VQ_BYTES) 43d9cb4336SCornelia Huck 44d9cb4336SCornelia Huck #define __SVE_ZREG_SIZE(vq) ((__u32)(vq) * __SVE_VQ_BYTES) 45d9cb4336SCornelia Huck #define __SVE_PREG_SIZE(vq) ((__u32)(vq) * (__SVE_VQ_BYTES / 8)) 46d9cb4336SCornelia Huck #define __SVE_FFR_SIZE(vq) __SVE_PREG_SIZE(vq) 47d9cb4336SCornelia Huck 48d9cb4336SCornelia Huck #define __SVE_ZREGS_OFFSET 0 49d9cb4336SCornelia Huck #define __SVE_ZREG_OFFSET(vq, n) \ 50d9cb4336SCornelia Huck (__SVE_ZREGS_OFFSET + __SVE_ZREG_SIZE(vq) * (n)) 51d9cb4336SCornelia Huck #define __SVE_ZREGS_SIZE(vq) \ 52d9cb4336SCornelia Huck (__SVE_ZREG_OFFSET(vq, __SVE_NUM_ZREGS) - __SVE_ZREGS_OFFSET) 53d9cb4336SCornelia Huck 54d9cb4336SCornelia Huck #define __SVE_PREGS_OFFSET(vq) \ 55d9cb4336SCornelia Huck (__SVE_ZREGS_OFFSET + __SVE_ZREGS_SIZE(vq)) 56d9cb4336SCornelia Huck #define __SVE_PREG_OFFSET(vq, n) \ 57d9cb4336SCornelia Huck (__SVE_PREGS_OFFSET(vq) + __SVE_PREG_SIZE(vq) * (n)) 58d9cb4336SCornelia Huck #define __SVE_PREGS_SIZE(vq) \ 59d9cb4336SCornelia Huck (__SVE_PREG_OFFSET(vq, __SVE_NUM_PREGS) - __SVE_PREGS_OFFSET(vq)) 60d9cb4336SCornelia Huck 61d9cb4336SCornelia Huck #define __SVE_FFR_OFFSET(vq) \ 62d9cb4336SCornelia Huck (__SVE_PREGS_OFFSET(vq) + __SVE_PREGS_SIZE(vq)) 63d9cb4336SCornelia Huck 64d9cb4336SCornelia Huck #endif /* ! _UAPI__ASM_SVE_CONTEXT_H */ 65