Commit c2919132 authored by Ravi Bangoria's avatar Ravi Bangoria Committed by Michael Ellerman
Browse files

powerpc/watchpoint: Get watchpoint count dynamically while disabling them 



Instead of disabling only one watchpoint, get num of available
watchpoints dynamically and disable all of them.

Signed-off-by: default avatarRavi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Reviewed-by: default avatarMichael Neuling <mikey@neuling.org>
Link: https://lore.kernel.org/r/20200514111741.97993-8-ravi.bangoria@linux.ibm.com
parent 4a8a9379

arch/powerpc/include/asm/hw_breakpoint.h

+8 −8
Original line number Diff line number Diff line
@@ -78,14 +78,14 @@ 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(0, &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);