1 /* SPDX-License-Identifier: GPL-2.0-or-later * 1
2 #ifndef _POWERPC_PERF_CALLCHAIN_H
3 #define _POWERPC_PERF_CALLCHAIN_H
4
5 void perf_callchain_user_64(struct perf_callch
6 struct pt_regs *re
7 void perf_callchain_user_32(struct perf_callch
8 struct pt_regs *re
9
10 static inline bool invalid_user_sp(unsigned lo
11 {
12 unsigned long mask = is_32bit_task() ?
13 unsigned long top = STACK_TOP - (is_32
14
15 return (!sp || (sp & mask) || (sp > to
16 }
17
18 /*
19 * On 32-bit we just access the address and le
20 * HPTE if necessary, so there is no need to f
21 * the page tables. Since this is called at i
22 * do_page_fault() won't treat a DSI as a page
23 */
24 static inline int __read_user_stack(const void
25 size_t siz
26 {
27 unsigned long addr = (unsigned long)pt
28
29 if (addr > TASK_SIZE - size || (addr &
30 return -EFAULT;
31
32 return copy_from_user_nofault(ret, ptr
33 }
34
35 #endif /* _POWERPC_PERF_CALLCHAIN_H */
36
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