Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *  Copyright 2020, IBM Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <asm/disassemble.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <asm/inst.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <asm/ppc-opcode.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #ifdef CONFIG_PPC64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) int probe_user_read_inst(struct ppc_inst *inst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 			 struct ppc_inst __user *nip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	unsigned int val, suffix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	err = copy_from_user_nofault(&val, nip, sizeof(val));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	if (get_op(val) == OP_PREFIX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 		err = copy_from_user_nofault(&suffix, (void __user *)nip + 4, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		*inst = ppc_inst_prefix(val, suffix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		*inst = ppc_inst(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) int probe_kernel_read_inst(struct ppc_inst *inst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 			   struct ppc_inst *src)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	unsigned int val, suffix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	err = copy_from_kernel_nofault(&val, src, sizeof(val));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	if (get_op(val) == OP_PREFIX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		err = copy_from_kernel_nofault(&suffix, (void *)src + 4, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		*inst = ppc_inst_prefix(val, suffix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		*inst = ppc_inst(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #else /* !CONFIG_PPC64 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) int probe_user_read_inst(struct ppc_inst *inst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 			 struct ppc_inst __user *nip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	unsigned int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	err = copy_from_user_nofault(&val, nip, sizeof(val));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 		*inst = ppc_inst(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) int probe_kernel_read_inst(struct ppc_inst *inst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 			   struct ppc_inst *src)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	unsigned int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	err = copy_from_kernel_nofault(&val, src, sizeof(val));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 		*inst = ppc_inst(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #endif /* CONFIG_PPC64 */