166b24a33SWill Deacon /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 266b24a33SWill Deacon /* Copyright (C) 2017-2018 ARM Limited */ 366b24a33SWill Deacon 466b24a33SWill Deacon /* 566b24a33SWill Deacon * For use by other UAPI headers only. 666b24a33SWill Deacon * Do not make direct use of header or its definitions. 766b24a33SWill Deacon */ 866b24a33SWill Deacon 966b24a33SWill Deacon #ifndef _UAPI__ASM_SVE_CONTEXT_H 1066b24a33SWill Deacon #define _UAPI__ASM_SVE_CONTEXT_H 1166b24a33SWill Deacon 1266b24a33SWill Deacon #include <linux/types.h> 1366b24a33SWill Deacon 1466b24a33SWill Deacon #define __SVE_VQ_BYTES 16 /* number of bytes per quadword */ 1566b24a33SWill Deacon 16*85aaadf6SAnup Patel /* 17*85aaadf6SAnup Patel * Yes, __SVE_VQ_MAX is 512 QUADWORDS. 18*85aaadf6SAnup Patel * 19*85aaadf6SAnup Patel * To help ensure forward portability, this is much larger than the 20*85aaadf6SAnup Patel * current maximum value defined by the SVE architecture. While arrays 21*85aaadf6SAnup Patel * or static allocations can be sized based on this value, watch out! 22*85aaadf6SAnup Patel * It will waste a surprisingly large amount of memory. 23*85aaadf6SAnup Patel * 24*85aaadf6SAnup Patel * Dynamic sizing based on the actual runtime vector length is likely to 25*85aaadf6SAnup Patel * be preferable for most purposes. 26*85aaadf6SAnup Patel */ 2766b24a33SWill Deacon #define __SVE_VQ_MIN 1 2866b24a33SWill Deacon #define __SVE_VQ_MAX 512 2966b24a33SWill Deacon 3066b24a33SWill Deacon #define __SVE_VL_MIN (__SVE_VQ_MIN * __SVE_VQ_BYTES) 3166b24a33SWill Deacon #define __SVE_VL_MAX (__SVE_VQ_MAX * __SVE_VQ_BYTES) 3266b24a33SWill Deacon 3366b24a33SWill Deacon #define __SVE_NUM_ZREGS 32 3466b24a33SWill Deacon #define __SVE_NUM_PREGS 16 3566b24a33SWill Deacon 3666b24a33SWill Deacon #define __sve_vl_valid(vl) \ 3766b24a33SWill Deacon ((vl) % __SVE_VQ_BYTES == 0 && \ 3866b24a33SWill Deacon (vl) >= __SVE_VL_MIN && \ 3966b24a33SWill Deacon (vl) <= __SVE_VL_MAX) 4066b24a33SWill Deacon 4166b24a33SWill Deacon #define __sve_vq_from_vl(vl) ((vl) / __SVE_VQ_BYTES) 4266b24a33SWill Deacon #define __sve_vl_from_vq(vq) ((vq) * __SVE_VQ_BYTES) 4366b24a33SWill Deacon 4466b24a33SWill Deacon #define __SVE_ZREG_SIZE(vq) ((__u32)(vq) * __SVE_VQ_BYTES) 4566b24a33SWill Deacon #define __SVE_PREG_SIZE(vq) ((__u32)(vq) * (__SVE_VQ_BYTES / 8)) 4666b24a33SWill Deacon #define __SVE_FFR_SIZE(vq) __SVE_PREG_SIZE(vq) 4766b24a33SWill Deacon 4866b24a33SWill Deacon #define __SVE_ZREGS_OFFSET 0 4966b24a33SWill Deacon #define __SVE_ZREG_OFFSET(vq, n) \ 5066b24a33SWill Deacon (__SVE_ZREGS_OFFSET + __SVE_ZREG_SIZE(vq) * (n)) 5166b24a33SWill Deacon #define __SVE_ZREGS_SIZE(vq) \ 5266b24a33SWill Deacon (__SVE_ZREG_OFFSET(vq, __SVE_NUM_ZREGS) - __SVE_ZREGS_OFFSET) 5366b24a33SWill Deacon 5466b24a33SWill Deacon #define __SVE_PREGS_OFFSET(vq) \ 5566b24a33SWill Deacon (__SVE_ZREGS_OFFSET + __SVE_ZREGS_SIZE(vq)) 5666b24a33SWill Deacon #define __SVE_PREG_OFFSET(vq, n) \ 5766b24a33SWill Deacon (__SVE_PREGS_OFFSET(vq) + __SVE_PREG_SIZE(vq) * (n)) 5866b24a33SWill Deacon #define __SVE_PREGS_SIZE(vq) \ 5966b24a33SWill Deacon (__SVE_PREG_OFFSET(vq, __SVE_NUM_PREGS) - __SVE_PREGS_OFFSET(vq)) 6066b24a33SWill Deacon 6166b24a33SWill Deacon #define __SVE_FFR_OFFSET(vq) \ 6266b24a33SWill Deacon (__SVE_PREGS_OFFSET(vq) + __SVE_PREGS_SIZE(vq)) 6366b24a33SWill Deacon 6466b24a33SWill Deacon #endif /* ! _UAPI__ASM_SVE_CONTEXT_H */ 65