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ARM: 7497/1: hw_breakpoint: allow single-byte watchpoints on all addresses
Breakpoint validation currently fails for single-byte watchpoints on addresses ending in 11b. There is no reason to forbid such a watchpoint, so extend the validation code to allow it. Cc: Ulrich Weigand <Ulrich.Weigand@de.ibm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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1 changed files with 4 additions and 3 deletions
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@ -610,13 +610,14 @@ int arch_validate_hwbkpt_settings(struct perf_event *bp)
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/* Aligned */
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break;
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case 1:
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/* Allow single byte watchpoint. */
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if (info->ctrl.len == ARM_BREAKPOINT_LEN_1)
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break;
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case 2:
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/* Allow halfword watchpoints and breakpoints. */
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if (info->ctrl.len == ARM_BREAKPOINT_LEN_2)
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break;
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case 3:
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/* Allow single byte watchpoint. */
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if (info->ctrl.len == ARM_BREAKPOINT_LEN_1)
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break;
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default:
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ret = -EINVAL;
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goto out;
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