lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Sun, 12 Feb 2017 05:07:40 -0800
From:   Andrew Pinski <apinski@...ium.com>
To:     Yury Norov <ynorov@...iumnetworks.com>
Cc:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>, linux-doc@...r.kernel.org,
        "linux-arch @ vger . kernel . org Arnd Bergmann" <arnd@...db.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Adam Borowski <kilobyte@...band.pl>,
        Chris Metcalf <cmetcalf@...hip.com>,
        Steve Ellcey <sellcey@...iumnetworks.com>,
        Maxim Kuvyrkov <maxim.kuvyrkov@...aro.org>,
        Ramana Radhakrishnan <ramana.gcc@...glemail.com>,
        Florian Weimer <fweimer@...hat.com>,
        Bamvor Zhangjian <bamvor.zhangjian@...wei.com>,
        Andreas Schwab <schwab@...e.de>,
        Chris Metcalf <cmetcalf@...lanox.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Mark Brown <broonie@...nel.org>,
        Joseph Myers <joseph@...esourcery.com>,
        christoph.muellner@...obroma-systems.com,
        Szabolcs Nagy <szabolcs.nagy@....com>,
        Alexey Klimov <klimov.linux@...il.com>,
        Nathan Lynch <Nathan_Lynch@...tor.com>,
        Alexander Graf <agraf@...e.de>,
        "Kapoor, Prasun" <Prasun.Kapoor@...iumnetworks.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Philipp Tomsich <philipp.tomsich@...obroma-systems.com>,
        manuel.montezelo@...il.com, linyongting@...wei.com,
        David Miller <davem@...emloft.net>, zhouchengming1@...wei.com
Subject: Re: [PATCH v7 00/20] ILP32 for ARM64

On Mon, Jan 9, 2017 at 3:29 AM, Yury Norov <ynorov@...iumnetworks.com> wrote:
> This series enables aarch64 with ilp32 mode.
>
> As supporting work, it introduces ARCH_32BIT_OFF_T configuration
> option that is enabled for existing 32-bit architectures but disabled
> for new arches (so 64-bit off_t is is used by new userspace). Also it
> deprecates getrlimit and setrlimit syscalls prior to prlimit64.
>
> This version is based on linux-next from 2017-01-09. It works with
> glibc-2.25, and tested with LTP, glibc testsuite, trinity, lmbench,
> CPUSpec.
>
> This is not RFC anymore. I believe that all ABI and implementation
> issues are resolved now. The way that kernel clears registers top
> halves is probably the last question, and because there's no objection
> for current approach for more that 6 month, I think, community agrees
> with it.
>
> Patches 1, 2, 3 and 8 are general, and may be applied separately.
>
> Current version does not introduce ABI changes comparing to RFC3.
> Kernel and GLIBC trees:
> https://github.com/norov/linux/tree/ilp32-2017-01-09
> https://github.com/norov/glibc/tree/dev9
>
> (GLIBC patches are managed by Steve Ellsey, so my tree is only for
> reference.)

For folks concerned about performance, here is what we get for SPEC
CPU 2006 on ThunderX 2 CN99xx.
Positive means ILP32 is faster than LP64.  This core does not have
AARCH32 so I can't compare that.
Also my LP64 scores don't change with and without the patches.

Options:
-Ofast -flto=32 -mcpu=native -fno-aggressive-loop-optimizations
-funroll-loops -fprefetch-loop-arrays
GCC 7.0.1 r245361 with ilp32 multi-arch patch applied.
4.10rc2 Plus ILP32 patches

SPEC CPU 2006 INT ILP32/LP64
400.perlbench           5.23%
401.bzip2                  7.83%
403.gcc                     6.22%
429.mcf                     14.25%
445.gobmk                 -1.33%
456.hmmer                 -0.61%
458.sjeng                    0.00%
462.libquantum            -7.38%
464.h264ref                 10.86%
471.omnetpp               13.53%
473.astar                      1.38%
483.xalancbmk             3.73%
Score                            4.29%

Rate (32):
400.perlbench           6.10%
401.bzip2                  7.10%
403.gcc                     6.71%
429.mcf                     57.29%
445.gobmk                -0.87%
456.hmmer                -0.19%
458.sjeng                  0.22%
462.libquantum         0.00%
464.h264ref              11.19%
471.omnetpp            11.80%
473.astar                  -0.29%
483.xalancbmk         8.87%
Score                       8.12%

Thanks,
Andrew Pinski

>
> Changes:
> v3: https://lkml.org/lkml/2014/9/3/704
> v4: https://lkml.org/lkml/2015/4/13/691
> v5: https://lkml.org/lkml/2015/9/29/911
> v6: https://lkml.org/lkml/2016/5/23/661
> v7: RFC nowrap:  https://lkml.org/lkml/2016/6/17/990
> v7: RFC2 nowrap: https://lkml.org/lkml/2016/8/17/245
> v7: RFC3 nowrap: https://lkml.org/lkml/2016/10/21/883
> v7: - 32-bit off_t deprecation is splitted for compat
>       and native 32-bit arches, as it was initially
>       done (patches 1, 2);
>     - getrlimit() and setrlimit() syscalls deprecated for
>       aarch64/ilp32 and all new architectures;
>     - documentation is cleaned up (patch 4);
>     - compat-related definitions moved from
>       aarch64/include/elf.h to binfmt_elf32.c (patch 11)
>     - for ptrace, execution mode detection is performed
>       at runtime, as it was in v4 (patch 18)
>
> Andrew Pinski (6):
>   arm64: rename COMPAT to AARCH32_EL0 in Kconfig
>   arm64: ensure the kernel is compiled for LP64
>   arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64
>   arm64: ilp32: add sys_ilp32.c and a separate table (in entry.S) to use
>     it
>   arm64: ilp32: introduce ilp32-specific handlers for sigframe and
>     ucontext
>   arm64:ilp32: add ARM64_ILP32 to Kconfig
>
> Philipp Tomsich (1):
>   arm64:ilp32: add vdso-ilp32 and use for signal return
>
> Yury Norov (13):
>   compat ABI: use non-compat openat and open_by_handle_at variants
>   32-bit ABI: introduce ARCH_32BIT_OFF_T config option
>   asm-generic: Drop getrlimit and setrlimit syscalls from default list
>   arm64: ilp32: add documentation on the ILP32 ABI for ARM64
>   thread: move thread bits accessors to separated file
>   arm64: introduce is_a32_task and is_a32_thread (for AArch32 compat)
>   arm64: ilp32: add is_ilp32_compat_{task,thread} and TIF_32BIT_AARCH64
>   arm64: introduce binfmt_elf32.c
>   arm64: ilp32: introduce binfmt_ilp32.c
>   arm64: ilp32: share aarch32 syscall handlers
>   arm64: signal: share lp64 signal routines to ilp32
>   arm64: signal32: move ilp32 and aarch32 common code to separated file
>   arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32
>
>  Documentation/arm64/ilp32.txt                 |  45 +++++++
>  arch/Kconfig                                  |   4 +
>  arch/arc/Kconfig                              |   1 +
>  arch/arc/include/uapi/asm/unistd.h            |   1 +
>  arch/arm/Kconfig                              |   1 +
>  arch/arm64/Kconfig                            |  19 ++-
>  arch/arm64/Makefile                           |   5 +
>  arch/arm64/include/asm/compat.h               |  19 +--
>  arch/arm64/include/asm/elf.h                  |  32 ++---
>  arch/arm64/include/asm/fpsimd.h               |   2 +-
>  arch/arm64/include/asm/ftrace.h               |   2 +-
>  arch/arm64/include/asm/hwcap.h                |   6 +-
>  arch/arm64/include/asm/is_compat.h            |  90 ++++++++++++++
>  arch/arm64/include/asm/memory.h               |   5 +-
>  arch/arm64/include/asm/processor.h            |  11 +-
>  arch/arm64/include/asm/ptrace.h               |   2 +-
>  arch/arm64/include/asm/seccomp.h              |   2 +-
>  arch/arm64/include/asm/signal32.h             |   9 +-
>  arch/arm64/include/asm/signal32_common.h      |  27 ++++
>  arch/arm64/include/asm/signal_common.h        |  33 +++++
>  arch/arm64/include/asm/signal_ilp32.h         |  38 ++++++
>  arch/arm64/include/asm/syscall.h              |   2 +-
>  arch/arm64/include/asm/thread_info.h          |   4 +-
>  arch/arm64/include/asm/unistd.h               |   8 +-
>  arch/arm64/include/asm/vdso.h                 |   6 +
>  arch/arm64/include/uapi/asm/bitsperlong.h     |   9 +-
>  arch/arm64/include/uapi/asm/unistd.h          |  13 ++
>  arch/arm64/kernel/Makefile                    |  18 ++-
>  arch/arm64/kernel/asm-offsets.c               |   9 +-
>  arch/arm64/kernel/binfmt_elf32.c              |  32 +++++
>  arch/arm64/kernel/binfmt_ilp32.c              |  98 +++++++++++++++
>  arch/arm64/kernel/cpufeature.c                |   8 +-
>  arch/arm64/kernel/cpuinfo.c                   |  20 +--
>  arch/arm64/kernel/entry.S                     |  34 +++++-
>  arch/arm64/kernel/entry32.S                   |  80 ------------
>  arch/arm64/kernel/entry32_common.S            | 107 ++++++++++++++++
>  arch/arm64/kernel/entry_ilp32.S               |  22 ++++
>  arch/arm64/kernel/head.S                      |   2 +-
>  arch/arm64/kernel/hw_breakpoint.c             |   8 +-
>  arch/arm64/kernel/perf_regs.c                 |   2 +-
>  arch/arm64/kernel/process.c                   |   7 +-
>  arch/arm64/kernel/ptrace.c                    |  80 ++++++++++--
>  arch/arm64/kernel/signal.c                    | 102 ++++++++++------
>  arch/arm64/kernel/signal32.c                  | 107 ----------------
>  arch/arm64/kernel/signal32_common.c           | 135 ++++++++++++++++++++
>  arch/arm64/kernel/signal_ilp32.c              | 170 ++++++++++++++++++++++++++
>  arch/arm64/kernel/sys_ilp32.c                 | 100 +++++++++++++++
>  arch/arm64/kernel/traps.c                     |   5 +-
>  arch/arm64/kernel/vdso-ilp32/.gitignore       |   2 +
>  arch/arm64/kernel/vdso-ilp32/Makefile         |  74 +++++++++++
>  arch/arm64/kernel/vdso-ilp32/vdso-ilp32.S     |  33 +++++
>  arch/arm64/kernel/vdso-ilp32/vdso-ilp32.lds.S |  95 ++++++++++++++
>  arch/arm64/kernel/vdso.c                      |  70 +++++++++--
>  arch/arm64/kernel/vdso/gettimeofday.S         |  20 ++-
>  arch/arm64/kernel/vdso/vdso.S                 |   6 +-
>  arch/blackfin/Kconfig                         |   1 +
>  arch/c6x/include/uapi/asm/unistd.h            |   1 +
>  arch/cris/Kconfig                             |   1 +
>  arch/frv/Kconfig                              |   1 +
>  arch/h8300/Kconfig                            |   1 +
>  arch/h8300/include/uapi/asm/unistd.h          |   1 +
>  arch/hexagon/Kconfig                          |   1 +
>  arch/hexagon/include/uapi/asm/unistd.h        |   1 +
>  arch/m32r/Kconfig                             |   1 +
>  arch/m68k/Kconfig                             |   1 +
>  arch/metag/Kconfig                            |   1 +
>  arch/metag/include/uapi/asm/unistd.h          |   1 +
>  arch/microblaze/Kconfig                       |   1 +
>  arch/mips/Kconfig                             |   1 +
>  arch/mn10300/Kconfig                          |   1 +
>  arch/nios2/Kconfig                            |   1 +
>  arch/nios2/include/uapi/asm/unistd.h          |   1 +
>  arch/openrisc/Kconfig                         |   1 +
>  arch/openrisc/include/uapi/asm/unistd.h       |   1 +
>  arch/parisc/Kconfig                           |   1 +
>  arch/powerpc/Kconfig                          |   1 +
>  arch/score/Kconfig                            |   1 +
>  arch/score/include/uapi/asm/unistd.h          |   1 +
>  arch/sh/Kconfig                               |   1 +
>  arch/sparc/Kconfig                            |   1 +
>  arch/tile/Kconfig                             |   1 +
>  arch/tile/include/uapi/asm/unistd.h           |   1 +
>  arch/tile/kernel/compat.c                     |   3 +
>  arch/unicore32/Kconfig                        |   1 +
>  arch/unicore32/include/uapi/asm/unistd.h      |   1 +
>  arch/x86/Kconfig                              |   1 +
>  arch/x86/um/Kconfig                           |   1 +
>  arch/xtensa/Kconfig                           |   1 +
>  drivers/clocksource/arm_arch_timer.c          |   2 +-
>  include/linux/fcntl.h                         |   2 +-
>  include/linux/thread_bits.h                   |  63 ++++++++++
>  include/linux/thread_info.h                   |  54 +-------
>  include/uapi/asm-generic/unistd.h             |  10 +-
>  93 files changed, 1600 insertions(+), 408 deletions(-)
>  create mode 100644 Documentation/arm64/ilp32.txt
>  create mode 100644 arch/arm64/include/asm/is_compat.h
>  create mode 100644 arch/arm64/include/asm/signal32_common.h
>  create mode 100644 arch/arm64/include/asm/signal_common.h
>  create mode 100644 arch/arm64/include/asm/signal_ilp32.h
>  create mode 100644 arch/arm64/kernel/binfmt_elf32.c
>  create mode 100644 arch/arm64/kernel/binfmt_ilp32.c
>  create mode 100644 arch/arm64/kernel/entry32_common.S
>  create mode 100644 arch/arm64/kernel/entry_ilp32.S
>  create mode 100644 arch/arm64/kernel/signal32_common.c
>  create mode 100644 arch/arm64/kernel/signal_ilp32.c
>  create mode 100644 arch/arm64/kernel/sys_ilp32.c
>  create mode 100644 arch/arm64/kernel/vdso-ilp32/.gitignore
>  create mode 100644 arch/arm64/kernel/vdso-ilp32/Makefile
>  create mode 100644 arch/arm64/kernel/vdso-ilp32/vdso-ilp32.S
>  create mode 100644 arch/arm64/kernel/vdso-ilp32/vdso-ilp32.lds.S
>  create mode 100644 include/linux/thread_bits.h
>
> --
> 2.7.4
>

Powered by blists - more mailing lists