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Diffstat (limited to 'arch/powerpc/include/asm/hw_breakpoint.h')
-rw-r--r--arch/powerpc/include/asm/hw_breakpoint.h49
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__ */