diff options
| author | Will Deacon <will.deacon@arm.com> | 2012-08-16 20:02:12 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-08-25 10:15:23 +0200 |
| commit | d968d2b801d877601d54e35e6dd0f52d9c797c99 (patch) | |
| tree | a6eba5aeb70163347d32bb01b6fb6e3e2609ce40 /arch/arm/kernel/hw_breakpoint.c | |
| parent | ARM: 7496/1: hw_breakpoint: don't rely on dfsr to show watchpoint access type (diff) | |
| download | linux-d968d2b801d877601d54e35e6dd0f52d9c797c99.tar.xz linux-d968d2b801d877601d54e35e6dd0f52d9c797c99.zip | |
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>
Diffstat (limited to 'arch/arm/kernel/hw_breakpoint.c')
| -rw-r--r-- | arch/arm/kernel/hw_breakpoint.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c index 18d39ea4c02f..281bf3301241 100644 --- a/arch/arm/kernel/hw_breakpoint.c +++ b/arch/arm/kernel/hw_breakpoint.c @@ -610,13 +610,14 @@ int arch_validate_hwbkpt_settings(struct perf_event *bp) /* Aligned */ break; case 1: - /* Allow single byte watchpoint. */ - if (info->ctrl.len == ARM_BREAKPOINT_LEN_1) - break; case 2: /* Allow halfword watchpoints and breakpoints. */ if (info->ctrl.len == ARM_BREAKPOINT_LEN_2) break; + case 3: + /* Allow single byte watchpoint. */ + if (info->ctrl.len == ARM_BREAKPOINT_LEN_1) + break; default: ret = -EINVAL; goto out; |