| // 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; | |
| } |