[PATCHv2 0/6] CONFIG_DEBUG_VIRTUAL for arm64

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From	Laura Abbott <labbott@redhat.com>
Newsgroups	linux.kernel
Subject	[PATCHv2 0/6] CONFIG_DEBUG_VIRTUAL for arm64
Date	Wed, 02 Nov 2016 22:10:02 +0100
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X-Original-Cc	Laura Abbott <labbott@redhat.com>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>, Marek Szyprowski <m.szyprowski@samsung.com>, Joonsoo Kim <iamjoonsoo.kim@lge.com>, linux-arm-kernel@lists.infradead.org
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Hi,

This is v2 of the series to add CONFIG_DEBUG_VIRTUAL support from arm64. This
has been split out into a number of patches:

Patch #1 Adds ARCH_HAS_DEBUG_VIRTUAL to avoid the need for adding arch
dependencies for DEBUG_VIRTUAL. This touches arch/x86/Kconfig

Patch #2 Cleans up cma to not rely on __pa_nodebug and have an #ifdef inline
in the function.

Patch #3 Adjust some macros in arm64 memory.h to be under __ASSEMBLY__
protection

Patch #4 Adds a cast for virt_to_pfn since __virt_to_phys for DEBUG_VIRTUAL no
longer has a cast.

Patch #5 Switches to using __pa_symbol for _end to avoid erroneously triggering
a bounds error with the debugging.

Patch #6 is the actual implementation of DEBUG_VIRTUAL. The biggest change from
the RFCv1 is the addition of __phys_addr_symbol. This is to handle several
places where the physical address of _end is needed. x86 avoids this problem by
doing its bounds check based on the entire possible image space which is well
beyond where _end would end up.

There are a few dependencies outside of arm64, so I don't know if
it will be easier for this to eventually go through arm64 or the mm tree.

Thanks,
Laura




Laura Abbott (6):
  lib/Kconfig.debug: Add ARCH_HAS_DEBUG_VIRTUAL
  mm/cma: Cleanup highmem check
  arm64: Move some macros under #ifndef __ASSEMBLY__
  arm64: Add cast for virt_to_pfn
  arm64: Use __pa_symbol for _end
  arm64: Add support for CONFIG_DEBUG_VIRTUAL

 arch/arm64/Kconfig              |  1 +
 arch/arm64/include/asm/memory.h | 50 ++++++++++++++++++++++++-----------------
 arch/arm64/mm/Makefile          |  2 ++
 arch/arm64/mm/init.c            |  4 ++--
 arch/arm64/mm/physaddr.c        | 34 ++++++++++++++++++++++++++++
 arch/x86/Kconfig                |  1 +
 lib/Kconfig.debug               |  5 ++++-
 mm/cma.c                        | 15 +++++--------
 8 files changed, 79 insertions(+), 33 deletions(-)
 create mode 100644 arch/arm64/mm/physaddr.c

-- 
2.10.1

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[PATCHv2 0/6] CONFIG_DEBUG_VIRTUAL for arm64 Laura Abbott <labbott@redhat.com> - 2016-11-02 22:10 +0100
  [PATCHv2 4/6] arm64: Add cast for virt_to_pfn Laura Abbott <labbott@redhat.com> - 2016-11-02 22:10 +0100
  Re: [PATCHv2 0/6] CONFIG_DEBUG_VIRTUAL for arm64 Mark Rutland <mark.rutland@arm.com> - 2016-11-03 00:10 +0100

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