/* SPDX-License-Identifier: GPL-2.0 */#ifndef _ASM_S390_RUNTIME_CONST_H#define _ASM_S390_RUNTIME_CONST_H #include <linux/uaccess.h> #define runtime_const_ptr(sym)					\({								\	typeof(sym) __ret;					\								\	asm_inline(						\		"0:	iihf	%[__ret],%[c1]\n"		\		"	iilf	%[__ret],%[c2]\n"		\		".pushsection runtime_ptr_" #sym ",\"a\"\n"	\		".long 0b - .\n"				\		".popsection"					\		: [__ret] "=d" (__ret)				\		: [c1] "i" (0x01234567UL),			\		  [c2] "i" (0x89abcdefUL));			\	__ret;							\}) #define runtime_const_shift_right_32(val, sym)			\({								\	unsigned int __ret = (val);				\								\	asm_inline(						\		"0:	srl	%[__ret],12\n"			\		".pushsection runtime_shift_" #sym ",\"a\"\n"	\		".long 0b - .\n"				\		".popsection"					\		: [__ret] "+d" (__ret));			\	__ret;							\}) #define runtime_const_mask_32(val, sym)				\({								\	unsigned int __ret = (val);				\								\	asm_inline(						\		"0:	nilf	%[__ret],12\n"			\		".pushsection runtime_mask_" #sym ",\"a\"\n"	\		".long 0b - .\n"				\		".popsection"					\		: [__ret] "+d" (__ret)				\		: : "cc");					\	__ret;							\}) #define runtime_const_init(type, sym) do {			\	extern s32 __start_runtime_##type##_##sym[];		\	extern s32 __stop_runtime_##type##_##sym[];		\								\	runtime_const_fixup(__runtime_fixup_##type,		\			    (unsigned long)(sym),		\			    __start_runtime_##type##_##sym,	\			    __stop_runtime_##type##_##sym);	\} while (0) static inline void __runtime_fixup_32(u32 *p, unsigned int val){	s390_kernel_write(p, &val, sizeof(val));} /* 32-bit immediate for iihf and iilf in bits in I2 field */static inline void __runtime_fixup_ptr(void *where, unsigned long val){	__runtime_fixup_32(where + 2, val >> 32);	__runtime_fixup_32(where + 8, val);} /* Immediate value is lower 12 bits of D2 field of srl */static inline void __runtime_fixup_shift(void *where, unsigned long val){	u32 insn = *(u32 *)where; 	insn &= 0xfffff000;	insn |= (val & 63);	s390_kernel_write(where, &insn, sizeof(insn));} /* 32-bit immediate for nilf in bits in I2 field */static inline void __runtime_fixup_mask(void *where, unsigned long val){	__runtime_fixup_32(where + 2, val);} static inline void runtime_const_fixup(void (*fn)(void *, unsigned long),				       unsigned long val, s32 *start, s32 *end){	while (start < end) {		fn(*start + (void *)start, val);		start++;	}} #endif /* _ASM_S390_RUNTIME_CONST_H */