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perf/x86: Remove get_hbp_len and replace with bp_len 

Clean up the logic for determining the breakpoint length

Signed-off-by: Jacob Shin <jacob.w.shin@gmail.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: xiakaixu <xiakaixu@huawei.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Jacob Shin 2014-05-29 17:26:53 +02:00 committed by Frederic Weisbecker
parent ec32398c23
commit 36748b9518
1 changed files with 1 additions and 24 deletions
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25
arch/x86/kernel/hw_breakpoint.c
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@ -167,29 +167,6 @@ void arch_uninstall_hw_breakpoint(struct perf_event *bp)
set_dr_addr_mask(0, i);
}
static int get_hbp_len(u8 hbp_len)
{
unsigned int len_in_bytes = 0;
switch (hbp_len) {
case X86_BREAKPOINT_LEN_1:
len_in_bytes = 1;
break;
case X86_BREAKPOINT_LEN_2:
len_in_bytes = 2;
break;
case X86_BREAKPOINT_LEN_4:
len_in_bytes = 4;
break;
#ifdef CONFIG_X86_64
case X86_BREAKPOINT_LEN_8:
len_in_bytes = 8;
break;
#endif
}
return len_in_bytes;
}
/*
* Check for virtual address in kernel space.
*/
@ -200,7 +177,7 @@ int arch_check_bp_in_kernelspace(struct perf_event *bp)
struct arch_hw_breakpoint *info = counter_arch_bp(bp);
va = info->address;
len = get_hbp_len(info->len);
len = bp->attr.bp_len;
return (va >= TASK_SIZE) && ((va + len - 1) >= TASK_SIZE);
}