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,
22 unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
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 user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
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,
98 unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
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 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
112 buf, 0, 32 * sizeof(double));
118 * Regardless of transactions, 'fp_state' holds the current running
119 * value of all FPR registers and 'ckfp_state' holds the last
120 * checkpointed value of all FPR registers for the current
123 * Userspace interface buffer layout:
129 int vsr_set(struct task_struct *target, const struct user_regset *regset,
130 unsigned int pos, unsigned int count,
131 const void *kbuf, const void __user *ubuf)
136 flush_tmregs_to_thread(target);
137 flush_fp_to_thread(target);
138 flush_altivec_to_thread(target);
139 flush_vsx_to_thread(target);
141 for (i = 0; i < 32 ; i++)
142 buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET];
144 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
145 buf, 0, 32 * sizeof(double));
147 for (i = 0; i < 32 ; i++)
148 target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = buf[i];