diff options
Diffstat (limited to 'arch/powerpc/include/asm/hw_breakpoint.h')
-rw-r--r-- | arch/powerpc/include/asm/hw_breakpoint.h | 49 |
1 files changed, 36 insertions, 13 deletions
diff --git a/arch/powerpc/include/asm/hw_breakpoint.h b/arch/powerpc/include/asm/hw_breakpoint.h index 27ac6f5d2891..66db0147d5b4 100644 --- a/arch/powerpc/include/asm/hw_breakpoint.h +++ b/arch/powerpc/include/asm/hw_breakpoint.h @@ -9,15 +9,19 @@ #ifndef _PPC_BOOK3S_64_HW_BREAKPOINT_H #define _PPC_BOOK3S_64_HW_BREAKPOINT_H +#include <asm/cpu_has_feature.h> + #ifdef __KERNEL__ struct arch_hw_breakpoint { unsigned long address; u16 type; u16 len; /* length of the target data symbol */ u16 hw_len; /* length programmed in hw */ + u8 flags; + bool perf_single_step; /* temporarily uninstalled for a perf single step */ }; -/* Note: Don't change the the first 6 bits below as they are in the same order +/* Note: Don't change the first 6 bits below as they are in the same order * as the dabr and dabrx. */ #define HW_BRK_TYPE_READ 0x01 @@ -34,11 +38,31 @@ struct arch_hw_breakpoint { #define HW_BRK_TYPE_PRIV_ALL (HW_BRK_TYPE_USER | HW_BRK_TYPE_KERNEL | \ HW_BRK_TYPE_HYP) -#define HW_BREAKPOINT_ALIGN 0x7 +#define HW_BRK_FLAG_DISABLED 0x1 + +/* Minimum granularity */ +#ifdef CONFIG_PPC_8xx +#define HW_BREAKPOINT_SIZE 0x4 +#else +#define HW_BREAKPOINT_SIZE 0x8 +#endif +#define HW_BREAKPOINT_SIZE_QUADWORD 0x10 #define DABR_MAX_LEN 8 #define DAWR_MAX_LEN 512 +static inline int nr_wp_slots(void) +{ + return cpu_has_feature(CPU_FTR_DAWR1) ? 2 : 1; +} + +bool wp_check_constraints(struct pt_regs *regs, ppc_inst_t instr, + unsigned long ea, int type, int size, + struct arch_hw_breakpoint *info); + +void wp_get_instr_detail(struct pt_regs *regs, ppc_inst_t *instr, + int *type, int *size, unsigned long *ea); + #ifdef CONFIG_HAVE_HW_BREAKPOINT #include <linux/kdebug.h> #include <asm/reg.h> @@ -60,7 +84,6 @@ extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused, unsigned long val, void *data); int arch_install_hw_breakpoint(struct perf_event *bp); void arch_uninstall_hw_breakpoint(struct perf_event *bp); -void arch_unregister_hw_breakpoint(struct perf_event *bp); void hw_breakpoint_pmu_read(struct perf_event *bp); extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk); @@ -69,14 +92,14 @@ extern void ptrace_triggered(struct perf_event *bp, struct perf_sample_data *data, struct pt_regs *regs); static inline void hw_breakpoint_disable(void) { - struct arch_hw_breakpoint brk; - - brk.address = 0; - brk.type = 0; - brk.len = 0; - brk.hw_len = 0; - if (ppc_breakpoint_available()) - __set_breakpoint(&brk); + int i; + struct arch_hw_breakpoint null_brk = {0}; + + if (!ppc_breakpoint_available()) + return; + + for (i = 0; i < nr_wp_slots(); i++) + __set_breakpoint(i, &null_brk); } extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs); int hw_breakpoint_handler(struct die_args *args); @@ -95,10 +118,10 @@ static inline bool dawr_enabled(void) { return dawr_force_enable; } -int set_dawr(struct arch_hw_breakpoint *brk); +int set_dawr(int nr, struct arch_hw_breakpoint *brk); #else static inline bool dawr_enabled(void) { return false; } -static inline int set_dawr(struct arch_hw_breakpoint *brk) { return -1; } +static inline int set_dawr(int nr, struct arch_hw_breakpoint *brk) { return -1; } #endif #endif /* __KERNEL__ */ |