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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: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Michael Neuling <mikey@neuling.org>
Link: https://lore.kernel.org/r/20200514111741.97993-8-ravi.bangoria@linux.ibm.com
This commit is contained in:
Ravi Bangoria 2020-05-14 16:47:32 +05:30 committed by Michael Ellerman
parent 4a8a9379f2
commit c291913273
1 changed files with 7 additions and 7 deletions
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14
arch/powerpc/include/asm/hw_breakpoint.h
View File

@ -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;
int i;
struct arch_hw_breakpoint null_brk = {0};
brk.address = 0;
brk.type = 0;
brk.len = 0;
brk.hw_len = 0;
if (ppc_breakpoint_available())
__set_breakpoint(0, &brk);
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);