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) #include <linux/regset.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <asm/switch_to.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include "ptrace-decl.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * Regardless of transactions, 'fp_state' holds the current running
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  * value of all FPR registers and 'ckfp_state' holds the last checkpointed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  * value of all FPR registers for the current transaction.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * Userspace interface buffer layout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  * struct data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  *	u64	fpr[32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  *	u64	fpscr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)  * };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) int fpr_get(struct task_struct *target, const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	    struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		     offsetof(struct thread_fp_state, fpr[32]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	flush_fp_to_thread(target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	return membuf_write(&to, &target->thread.fp_state, 33 * sizeof(u64));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)  * Regardless of transactions, 'fp_state' holds the current running
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)  * value of all FPR registers and 'ckfp_state' holds the last checkpointed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)  * value of all FPR registers for the current transaction.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)  * Userspace interface buffer layout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)  * struct data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)  *	u64	fpr[32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)  *	u64	fpscr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)  * };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) int fpr_set(struct task_struct *target, const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	    unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	    const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		     offsetof(struct thread_fp_state, fpr[32]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	flush_fp_to_thread(target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 				  &target->thread.fp_state, 0, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }