1 // SPDX-License-Identifier: GPL-2.0-or-later
3 #include <linux/regset.h>
5 #include <asm/switch_to.h>
7 #include "ptrace-decl.h"
10 * Regardless of transactions, 'fp_state' holds the current running
11 * value of all FPR registers and 'ckfp_state' holds the last checkpointed
12 * value of all FPR registers for the current transaction.
14 * Userspace interface buffer layout:
21 int fpr_get(struct task_struct *target, const struct user_regset *regset,
27 flush_fp_to_thread(target);
29 /* copy to local buffer then write that out */
30 for (i = 0; i < 32 ; i++)
31 buf[i] = target->thread.TS_FPR(i);
32 buf[32] = target->thread.fp_state.fpscr;
33 return membuf_write(&to, buf, 33 * sizeof(u64));
37 * Regardless of transactions, 'fp_state' holds the current running
38 * value of all FPR registers and 'ckfp_state' holds the last checkpointed
39 * value of all FPR registers for the current transaction.
41 * Userspace interface buffer layout:
49 int fpr_set(struct task_struct *target, const struct user_regset *regset,
50 unsigned int pos, unsigned int count,
51 const void *kbuf, const void __user *ubuf)
56 flush_fp_to_thread(target);
58 for (i = 0; i < 32 ; i++)
59 buf[i] = target->thread.TS_FPR(i);
60 buf[32] = target->thread.fp_state.fpscr;
62 /* copy to local buffer then write that out */
63 i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
67 for (i = 0; i < 32 ; i++)
68 target->thread.TS_FPR(i) = buf[i];
69 target->thread.fp_state.fpscr = buf[32];
74 * Currently to set and and get all the vsx state, you need to call
75 * the fp and VMX calls as well. This only get/sets the lower 32
76 * 128bit VSX registers.
79 int vsr_active(struct task_struct *target, const struct user_regset *regset)
81 flush_vsx_to_thread(target);
82 return target->thread.used_vsr ? regset->n : 0;
86 * Regardless of transactions, 'fp_state' holds the current running
87 * value of all FPR registers and 'ckfp_state' holds the last
88 * checkpointed value of all FPR registers for the current
91 * Userspace interface buffer layout:
97 int vsr_get(struct task_struct *target, const struct user_regset *regset,
103 flush_tmregs_to_thread(target);
104 flush_fp_to_thread(target);
105 flush_altivec_to_thread(target);
106 flush_vsx_to_thread(target);
108 for (i = 0; i < 32 ; i++)
109 buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
111 return membuf_write(&to, buf, 32 * sizeof(double));
115 * Regardless of transactions, 'fp_state' holds the current running
116 * value of all FPR registers and 'ckfp_state' holds the last
117 * checkpointed value of all FPR registers for the current
120 * Userspace interface buffer layout:
126 int vsr_set(struct task_struct *target, const struct user_regset *regset,
127 unsigned int pos, unsigned int count,
128 const void *kbuf, const void __user *ubuf)
133 flush_tmregs_to_thread(target);
134 flush_fp_to_thread(target);
135 flush_altivec_to_thread(target);
136 flush_vsx_to_thread(target);
138 for (i = 0; i < 32 ; i++)
139 buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
141 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
142 buf, 0, 32 * sizeof(double));
144 for (i = 0; i < 32 ; i++)
145 target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];