101 lines
3.0 KiB
C
101 lines
3.0 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* PowerPC BookIII S hardware breakpoint definitions
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*
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* Copyright 2010, IBM Corporation.
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* Author: K.Prasad <prasad@linux.vnet.ibm.com>
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*/
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#ifndef _PPC_BOOK3S_64_HW_BREAKPOINT_H
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#define _PPC_BOOK3S_64_HW_BREAKPOINT_H
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#ifdef __KERNEL__
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struct arch_hw_breakpoint {
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unsigned long address;
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u16 type;
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u16 len; /* length of the target data symbol */
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};
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/* Note: Don't change the the first 6 bits below as they are in the same order
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* as the dabr and dabrx.
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*/
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#define HW_BRK_TYPE_READ 0x01
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#define HW_BRK_TYPE_WRITE 0x02
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#define HW_BRK_TYPE_TRANSLATE 0x04
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#define HW_BRK_TYPE_USER 0x08
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#define HW_BRK_TYPE_KERNEL 0x10
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#define HW_BRK_TYPE_HYP 0x20
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#define HW_BRK_TYPE_EXTRANEOUS_IRQ 0x80
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/* bits that overlap with the bottom 3 bits of the dabr */
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#define HW_BRK_TYPE_RDWR (HW_BRK_TYPE_READ | HW_BRK_TYPE_WRITE)
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#define HW_BRK_TYPE_DABR (HW_BRK_TYPE_RDWR | HW_BRK_TYPE_TRANSLATE)
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#define HW_BRK_TYPE_PRIV_ALL (HW_BRK_TYPE_USER | HW_BRK_TYPE_KERNEL | \
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HW_BRK_TYPE_HYP)
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#ifdef CONFIG_HAVE_HW_BREAKPOINT
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#include <linux/kdebug.h>
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#include <asm/reg.h>
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#include <asm/debug.h>
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struct perf_event_attr;
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struct perf_event;
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struct pmu;
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struct perf_sample_data;
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struct task_struct;
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#define HW_BREAKPOINT_ALIGN 0x7
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extern int hw_breakpoint_slots(int type);
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extern int arch_bp_generic_fields(int type, int *gen_bp_type);
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extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
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extern int hw_breakpoint_arch_parse(struct perf_event *bp,
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const struct perf_event_attr *attr,
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struct arch_hw_breakpoint *hw);
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extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
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unsigned long val, void *data);
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int arch_install_hw_breakpoint(struct perf_event *bp);
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void arch_uninstall_hw_breakpoint(struct perf_event *bp);
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void arch_unregister_hw_breakpoint(struct perf_event *bp);
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void hw_breakpoint_pmu_read(struct perf_event *bp);
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extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
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extern struct pmu perf_ops_bp;
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extern void ptrace_triggered(struct perf_event *bp,
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struct perf_sample_data *data, struct pt_regs *regs);
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static inline void hw_breakpoint_disable(void)
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{
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struct arch_hw_breakpoint brk;
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brk.address = 0;
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brk.type = 0;
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brk.len = 0;
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if (ppc_breakpoint_available())
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__set_breakpoint(&brk);
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}
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extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs);
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int hw_breakpoint_handler(struct die_args *args);
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#else /* CONFIG_HAVE_HW_BREAKPOINT */
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static inline void hw_breakpoint_disable(void) { }
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static inline void thread_change_pc(struct task_struct *tsk,
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struct pt_regs *regs) { }
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#endif /* CONFIG_HAVE_HW_BREAKPOINT */
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#ifdef CONFIG_PPC_DAWR
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extern bool dawr_force_enable;
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static inline bool dawr_enabled(void)
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{
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return dawr_force_enable;
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}
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int set_dawr(struct arch_hw_breakpoint *brk);
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#else
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static inline bool dawr_enabled(void) { return false; }
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static inline int set_dawr(struct arch_hw_breakpoint *brk) { return -1; }
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#endif
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#endif /* __KERNEL__ */
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#endif /* _PPC_BOOK3S_64_HW_BREAKPOINT_H */
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