Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _POWERPC_PERF_CALLCHAIN_H
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#define _POWERPC_PERF_CALLCHAIN_H
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void perf_callchain_user_64(struct perf_callchain_entry_ctx *entry,
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struct pt_regs *regs);
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void perf_callchain_user_32(struct perf_callchain_entry_ctx *entry,
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struct pt_regs *regs);
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static inline bool invalid_user_sp(unsigned long sp)
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{
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unsigned long mask = is_32bit_task() ? 3 : 7;
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unsigned long top = STACK_TOP - (is_32bit_task() ? 16 : 32);
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return (!sp || (sp & mask) || (sp > top));
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}
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/*
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* On 32-bit we just access the address and let hash_page create a
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* HPTE if necessary, so there is no need to fall back to reading
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* the page tables. Since this is called at interrupt level,
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* do_page_fault() won't treat a DSI as a page fault.
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*/
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static inline int __read_user_stack(const void __user *ptr, void *ret,
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size_t size)
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{
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unsigned long addr = (unsigned long)ptr;
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if (addr > TASK_SIZE - size || (addr & (size - 1)))
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return -EFAULT;
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return copy_from_user_nofault(ret, ptr, size);
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}
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#endif /* _POWERPC_PERF_CALLCHAIN_H */
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