Will Deacon cdc27c2784 arm64: ptrace: avoid using HW_BREAKPOINT_EMPTY for disabled events ... Commit 8f34a1da35 ("arm64: ptrace: use HW_BREAKPOINT_EMPTY type for disabled breakpoints") fixed an issue with GDB trying to zero breakpoint control registers. The problem there is that the arch hw_breakpoint code will attempt to create a (disabled), execute breakpoint of length 0. This will fail validation and report unexpected failure to GDB. To avoid this, we treated disabled breakpoints as HW_BREAKPOINT_EMPTY, but that seems to have broken with recent kernels, causing watchpoints to be treated as TYPE_INST in the core code and returning ENOSPC for any further breakpoints. This patch fixes the problem by prioritising the `enable' field of the breakpoint: if it is cleared, we simply update the perf_event_attr to indicate that the thing is disabled and don't bother changing either the type or the length. This reinforces the behaviour that the breakpoint control register is essentially read-only apart from the enable bit when disabling a breakpoint. Cc: <stable@vger.kernel.org> Reported-by: Aaron Liu <liucy214@gmail.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2013-12-19 17:41:25 +00:00
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boot	arm64: dts: Reserve the memory used for secondary CPU release address	2013-11-25 16:44:04 +00:00
configs	arm64: defconfig: Enable CONFIG_PREEMPT by default	2013-11-05 10:03:53 +00:00
include	arm64: mm: Fix PMD_SECT_PROT_NONE definition	2013-12-06 17:22:44 +00:00
kernel	arm64: ptrace: avoid using HW_BREAKPOINT_EMPTY for disabled events	2013-12-19 17:41:25 +00:00
kvm	Here are the 3.13 KVM changes. There was a lot of work on the PPC	2013-11-15 13:51:36 +09:00
lib	arm64: Treat the bitops index argument as an 'int'	2013-05-08 10:33:17 +01:00
mm	arm64: ensure completion of TLB invalidatation	2013-12-06 17:21:49 +00:00
xen	xen/arm,arm64: enable SWIOTLB_XEN	2013-10-10 13:40:44 +00:00
Kconfig	arm64: make default NR_CPUS 8	2013-12-06 17:21:50 +00:00
Kconfig.debug	arm64: Remove duplicate DEBUG_STACK_USAGE config	2013-10-02 18:03:26 +01:00
Makefile	arm64: big-endian: add big-endian support to top-level arch Makefile	2013-10-25 15:59:31 +01:00