cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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hw_breakpoint.h (1970B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __ASM_SH_HW_BREAKPOINT_H
      3#define __ASM_SH_HW_BREAKPOINT_H
      4
      5#include <uapi/asm/hw_breakpoint.h>
      6
      7#define __ARCH_HW_BREAKPOINT_H
      8
      9#include <linux/kdebug.h>
     10#include <linux/types.h>
     11
     12struct arch_hw_breakpoint {
     13	unsigned long	address;
     14	u16		len;
     15	u16		type;
     16};
     17
     18enum {
     19	SH_BREAKPOINT_READ	= (1 << 1),
     20	SH_BREAKPOINT_WRITE	= (1 << 2),
     21	SH_BREAKPOINT_RW	= SH_BREAKPOINT_READ | SH_BREAKPOINT_WRITE,
     22
     23	SH_BREAKPOINT_LEN_1	= (1 << 12),
     24	SH_BREAKPOINT_LEN_2	= (1 << 13),
     25	SH_BREAKPOINT_LEN_4	= SH_BREAKPOINT_LEN_1 | SH_BREAKPOINT_LEN_2,
     26	SH_BREAKPOINT_LEN_8	= (1 << 14),
     27};
     28
     29struct sh_ubc {
     30	const char	*name;
     31	unsigned int	num_events;
     32	unsigned int	trap_nr;
     33	void		(*enable)(struct arch_hw_breakpoint *, int);
     34	void		(*disable)(struct arch_hw_breakpoint *, int);
     35	void		(*enable_all)(unsigned long);
     36	void		(*disable_all)(void);
     37	unsigned long	(*active_mask)(void);
     38	unsigned long	(*triggered_mask)(void);
     39	void		(*clear_triggered_mask)(unsigned long);
     40	struct clk	*clk;	/* optional interface clock / MSTP bit */
     41};
     42
     43struct perf_event_attr;
     44struct perf_event;
     45struct task_struct;
     46struct pmu;
     47
     48/* Maximum number of UBC channels */
     49#define HBP_NUM		2
     50
     51static inline int hw_breakpoint_slots(int type)
     52{
     53	return HBP_NUM;
     54}
     55
     56/* arch/sh/kernel/hw_breakpoint.c */
     57extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
     58extern int hw_breakpoint_arch_parse(struct perf_event *bp,
     59				    const struct perf_event_attr *attr,
     60				    struct arch_hw_breakpoint *hw);
     61extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
     62					   unsigned long val, void *data);
     63
     64int arch_install_hw_breakpoint(struct perf_event *bp);
     65void arch_uninstall_hw_breakpoint(struct perf_event *bp);
     66void hw_breakpoint_pmu_read(struct perf_event *bp);
     67
     68extern void arch_fill_perf_breakpoint(struct perf_event *bp);
     69extern int register_sh_ubc(struct sh_ubc *);
     70
     71extern struct pmu perf_ops_bp;
     72
     73#endif /* __ASM_SH_HW_BREAKPOINT_H */