From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 00/11] ARM: hw_breakpoint: fixes and improvements (v3)
Date: Thu, 2 Dec 2010 13:45:51 +0000 [thread overview]
Message-ID: <1291297562-8052-1-git-send-email-will.deacon@arm.com> (raw)
Hello again,
This is version 3 of the patchset originally posted here:
[v1]: http://lists.infradead.org/pipermail/linux-arm-kernel/2010-November/032717.html
[v2]: http://lists.infradead.org/pipermail/linux-arm-kernel/2010-November/032962.html
It's grown a bit since v2, but I think I've caught all of the corner cases now.
Thanks to the people who have highlighted any problems.
Changes since v2 include:
* Unified single-stepping mechanism for watchpoints and breakpoints
* Corrected misdiagnosis of the problem fixed in patch 6 (`do not allocate...')
* For cores where monitor mode cannot be enabled due to hardware restrictions,
we no longer fail the initcall or WARN_ONCE.
* Per-cpu breakpoints are disallowed for the time being because they cannot
be stepped reliably (since we may take an interrupt before the step has
completed).
* Updated the comment describing why only a single watchpoint is available.
As per usual, all feedback is welcome.
Will Deacon (11):
ARM: hw_breakpoint: ensure OS lock is clear before writing to debug
registers
ARM: hw_breakpoint: reset control registers in hotplug path
ARM: hw_breakpoint: correct and simplify alignment fixup code
ARM: hw_breakpoint: disable preemption during debug exception
handling
ARM: hw_breakpoint: don't advertise reserved breakpoints
ARM: hw_breakpoint: do not allocate new breakpoints with preemption
disabled
ARM: hw_breakpoint: unify single-stepping code for watchpoints and
breakpoints
ARM: hw_breakpoint: disallow per-cpu breakpoints without overflow
handler
ARM: ptrace: fix style issue with hw_breakpoint interface
ARM: hw_breakpoint: fix warnings generated by sparse
ARM: hw_breakpoint: do not fail initcall if monitor mode is disabled
arch/arm/include/asm/hw_breakpoint.h | 4 +-
arch/arm/kernel/entry-armv.S | 4 +
arch/arm/kernel/entry-header.S | 19 ++
arch/arm/kernel/hw_breakpoint.c | 545 ++++++++++++++++++++--------------
arch/arm/kernel/ptrace.c | 4 +-
5 files changed, 349 insertions(+), 227 deletions(-)
next reply other threads:[~2010-12-02 13:45 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-02 13:45 Will Deacon [this message]
2010-12-02 13:45 ` [PATCH 01/11] ARM: hw_breakpoint: ensure OS lock is clear before writing to debug registers Will Deacon
2010-12-02 13:45 ` [PATCH 02/11] ARM: hw_breakpoint: reset control registers in hotplug path Will Deacon
2010-12-02 13:45 ` [PATCH 03/11] ARM: hw_breakpoint: correct and simplify alignment fixup code Will Deacon
2010-12-02 13:45 ` [PATCH 04/11] ARM: hw_breakpoint: disable preemption during debug exception handling Will Deacon
2010-12-02 13:45 ` [PATCH 05/11] ARM: hw_breakpoint: don't advertise reserved breakpoints Will Deacon
2010-12-02 13:45 ` [PATCH 06/11] ARM: hw_breakpoint: do not allocate new breakpoints with preemption disabled Will Deacon
2010-12-02 13:45 ` [PATCH 07/11] ARM: hw_breakpoint: unify single-stepping code for watchpoints and breakpoints Will Deacon
2010-12-02 13:45 ` [PATCH 08/11] ARM: hw_breakpoint: disallow per-cpu breakpoints without overflow handler Will Deacon
2010-12-02 13:46 ` [PATCH 09/11] ARM: ptrace: fix style issue with hw_breakpoint interface Will Deacon
2010-12-02 13:46 ` [PATCH 10/11] ARM: hw_breakpoint: fix warnings generated by sparse Will Deacon
2010-12-02 14:30 ` Russell King - ARM Linux
2010-12-02 14:33 ` Will Deacon
2010-12-02 13:46 ` [PATCH 11/11] ARM: hw_breakpoint: do not fail initcall if monitor mode is disabled Will Deacon
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