// SPDX-License-Identifier: GPL-2.0-only #include <linux/uaccess.h> #include <linux/kernel.h> #include <asm/disassemble.h> #include <asm/inst.h> #include <asm/ppc-opcode.h> bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size) { return is_kernel_addr((unsigned long)unsafe_src); } int copy_inst_from_kernel_nofault(struct ppc_inst *inst, u32 *src) { unsigned int val, suffix; int err; err = copy_from_kernel_nofault(&val, src, sizeof(val)); if (err) return err; if (IS_ENABLED(CONFIG_PPC64) && get_op(val) == OP_PREFIX) { err = copy_from_kernel_nofault(&suffix, src + 1, sizeof(suffix)); *inst = ppc_inst_prefix(val, suffix); } else { *inst = ppc_inst(val); } return err; }