ARM: hw_breakpoint: reset control registers in hotplug path

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The ARMv7 debug architecture doesn't make any guarantees about the
contents of debug control registers following a debug logic reset.

This patch ensures that we reset the control registers when a cpu
comes ONLINE (for example, with hotplug) so that when we enable
monitor mode while inserting a breakpoint we won't exhibit random
behaviour.

Signed-off-by: Will Deacon <will.deacon@arm.com>

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Will Deacon 2010-11-24 17:45:49 +00:00

parent ac88e07122

commit 7d99331e47

1 changed files with 15 additions and 1 deletions

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arch/arm/kernel/hw_breakpoint.c

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