Kristina Martsenko 7dcd9dd8ce arm64: hw_breakpoint: fix watchpoint matching for tagged pointers ... When we take a watchpoint exception, the address that triggered the watchpoint is found in FAR_EL1. We compare it to the address of each configured watchpoint to see which one was hit. The configured watchpoint addresses are untagged, while the address in FAR_EL1 will have an address tag if the data access was done using a tagged address. The tag needs to be removed to compare the address to the watchpoints. Currently we don't remove it, and as a result can report the wrong watchpoint as being hit (specifically, always either the highest TTBR0 watchpoint or lowest TTBR1 watchpoint). This patch removes the tag. Fixes: d50240a5f6 ("arm64: mm: permit use of tagged pointers at EL0") Cc: <stable@vger.kernel.org> # 3.12.x- Acked-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2017-05-09 17:26:40 +01:00
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asm	arm64: hw_breakpoint: fix watchpoint matching for tagged pointers	2017-05-09 17:26:40 +01:00
uapi/asm	arm64: v8.3: Support for weaker release consistency	2017-03-20 16:30:22 +00:00