linux-kernel - Re: [PATCH v9 00/24] ILP32 for ARM64

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Date:   Mon, 19 Nov 2018 21:29:01 +0000
From:   Yury Norov <ynorov@...iumnetworks.com>
To:     Catalin Marinas <catalin.marinas@....com>,
        Arnd Bergmann <arnd@...db.de>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        "linux-api@...r.kernel.org" <linux-api@...r.kernel.org>
CC:     Adam Borowski <kilobyte@...band.pl>,
        Alexander Graf <agraf@...e.de>,
        Alexey Klimov <klimov.linux@...il.com>,
        Andreas Schwab <schwab@...e.de>,
        Andrew Pinski <pinskia@...il.com>,
        Bamvor Zhangjian <bamv2005@...il.com>,
        Chris Metcalf <cmetcalf@...lanox.com>,
        Christoph Muellner <christoph.muellner@...obroma-systems.com>,
        Dave Martin <Dave.Martin@....com>,
        "David S . Miller" <davem@...emloft.net>,
        Florian Weimer <fweimer@...hat.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        James Hogan <james.hogan@...tec.com>,
        James Morse <james.morse@....com>,
        Joseph Myers <joseph@...esourcery.com>,
        Lin Yongting <linyongting@...wei.com>,
        Manuel Montezelo <manuel.montezelo@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Maxim Kuvyrkov <maxim.kuvyrkov@...aro.org>,
        Nathan_Lynch <Nathan_Lynch@...tor.com>,
        Philipp Tomsich <philipp.tomsich@...obroma-systems.com>,
        "Kapoor, Prasun" <Prasun.Kapoor@...ium.com>,
        Ramana Radhakrishnan <ramana.gcc@...glemail.com>,
        "Ellcey, Steve" <Steve.Ellcey@...ium.com>,
        Szabolcs Nagy <szabolcs.nagy@....com>
Subject: Re: [PATCH v9 00/24] ILP32 for ARM64

Hi all,

On Wed, May 16, 2018 at 11:18:45AM +0300, Yury Norov 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 userspace type is used by new userspace).
> Also it deprecates getrlimit and setrlimit syscalls prior to prlimit64.
> 
> Based on kernel v4.16. Tested with LTP, glibc testsuite, trinity, lmbench,
> CPUSpec.
> 
> This series on github: 
> https://github.com/norov/linux/tree/ilp32-4.16
> Linaro toolchain:
> http://snapshots.linaro.org/components/toolchain/binaries/7.3-2018.04-rc1/aarch64-linux-gnu_ilp32/
> Debian repo:
> http://people.linaro.org/~wookey/ilp32/
> OpenSUSE repo:
> https://build.opensuse.org/project/show/devel:ARM:Factory:Contrib:ILP32
> 
> 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: https://lkml.org/lkml/2017/1/9/213
> v8: https://lkml.org/lkml/2017/6/19/624
> v9: - rebased on top of v4.16;
>     - signal subsystem reworked to avoid code duplication, as requested
>       by Dave Martin (patches 18 and 20);
>     - new files introduced in series use SPDX notation for license;
>     - linux-api and linux-arch CCed as the series changes kernel ABI;
>     - checkpatch and other minor fixes.
>     - Zhou Chengming's reported-by for patch 2 and signed-off-by for
>       patch 21 removed because his email became invalid. Zhou, please
>       share your new email.

This is the 4.19-based update:
https://github.com/norov/linux/tree/ilp32-4.19

Syscall machinery is rewritten in C in mainline kernel, ILP32 is aligned
with it. The following patches are mostly affected:

arm64: ilp32: introduce ilp32-specific sigframe and ucontext
arm64: signal32: move ilp32 and aarch32 common code to separated file
arm64: signal: share lp64 signal structures and routines to ilp32
arm64: ilp32: introduce syscall table for ILP32
arm64: ilp32: share aarch32 syscall handlers

4.18 branch from Catalin is here:
https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=staging/ilp32-4.18

Yury