| // 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; |
| } |
