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From: ynorov@caviumnetworks.com (Yury Norov)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 07/24] arm64: ilp32: add documentation on the ILP32 ABI for ARM64
Date: Thu, 24 May 2018 15:15:24 +0300	[thread overview]
Message-ID: <20180524121524.GA3873@yury-thinkpad> (raw)
In-Reply-To: <20180523140620.GA27215@amd>

Hi Pavel,

On Wed, May 23, 2018 at 04:06:20PM +0200, Pavel Machek wrote:
> On Wed 2018-05-16 11:18:52, Yury Norov wrote:
> > Based on Andrew Pinski's patch-series.
> > 
> > Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
> 
> So Andrew's signoff should be here?

Yes it should, but it lost since v4. I'll restore it.
 
> > ---
> >  Documentation/arm64/ilp32.txt | 45 +++++++++++++++++++++++++++++++++++
> >  1 file changed, 45 insertions(+)
> >  create mode 100644 Documentation/arm64/ilp32.txt
> > 
> > diff --git a/Documentation/arm64/ilp32.txt b/Documentation/arm64/ilp32.txt
> > new file mode 100644
> > index 000000000000..d0fd5109c4b2
> > --- /dev/null
> > +++ b/Documentation/arm64/ilp32.txt
> > @@ -0,0 +1,45 @@
> > +ILP32 AARCH64 SYSCALL ABI
> > +=========================
> > +
> > +This document describes the ILP32 syscall ABI and where it differs
> > +from the generic compat linux syscall interface.
> 
> I was hoping to learn what ILP32 is / what is it good for, but no,
> this does not tell me... it would be good to do a short explanation
> here, and maybe reference it from cover letter of the series...
> 								Pavel

ILP32 is ABI acronym that means "Integers, Longs and Pointers are 32-bit".
And LP64 means "Longs and Pointers are 64-bit".

There's AN490 - "ILP32 for AArch64 Whitepaper" from ARM which covers
the topic:
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dai0490a/ar01s01.html

And some talks:
http://connect.linaro.org/resource/bkk16/bkk16-305b/

Briefly, ILP32 is 32-bit ABI that works with AARCH64 instruction set. It looks
better in some performance tests, and is useful for compatibility with 32-bit
legacy code.

If you're more familiar with x86 terminology, in ARM world LP64 corresponds
to x86_64, AARCH32_EL0 corresponds to x86_32, and ILP32 corresponds to x32
ABI.

I'll add link to AN490 in next submission.

Yury

> -- 
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

  reply	other threads:[~2018-05-24 12:15 UTC|newest]

Thread overview: 71+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-16  8:18 [PATCH v9 00/24] ILP32 for ARM64 Yury Norov
2018-05-16  8:18 ` [PATCH 01/24] arm64: signal: Make parse_user_sigframe() independent of rt_sigframe layout Yury Norov
2018-05-16  8:18 ` [PATCH 02/24] ptrace: Add compat PTRACE_{G,S}ETSIGMASK handlers Yury Norov
2018-05-16  8:18 ` [PATCH 03/24] compat ABI: use non-compat openat and open_by_handle_at variants Yury Norov
2018-05-16  8:18 ` [PATCH 04/24] 32-bit userspace ABI: introduce ARCH_32BIT_OFF_T config option Yury Norov
2018-06-08 17:32   ` Catalin Marinas
2018-06-08 22:33     ` Palmer Dabbelt
2018-06-09  7:43       ` Yury Norov
2018-06-09 21:13       ` Adam Borowski
2018-06-09  7:42     ` Yury Norov
2018-06-11  7:48       ` Arnd Bergmann
2018-06-11 11:27         ` Yury Norov
2018-06-25  6:19           ` Yury Norov
2018-08-02 18:30             ` Palmer Dabbelt
2018-05-16  8:18 ` [PATCH 06/24] thread: move thread bits accessors to separated file Yury Norov
2018-05-16  8:18 ` [PATCH 07/24] arm64: ilp32: add documentation on the ILP32 ABI for ARM64 Yury Norov
2018-05-23 14:06   ` Pavel Machek
2018-05-24 12:15     ` Yury Norov [this message]
2018-05-24 12:24       ` Dr. Philipp Tomsich
2018-05-16  8:18 ` [PATCH 08/24] arm64: rename COMPAT to AARCH32_EL0 in Kconfig Yury Norov
2018-05-16  8:18 ` [PATCH 09/24] arm64: rename functions that reference compat term Yury Norov
2018-05-16  8:18 ` [PATCH 10/24] arm64: uapi: set __BITS_PER_LONG correctly for ILP32 and LP64 Yury Norov
2018-05-16  8:18 ` [PATCH 11/24] arm64: introduce is_a32_task and is_a32_thread (for AArch32 compat) Yury Norov
2018-05-16  8:18 ` [PATCH 12/24] arm64: ilp32: add is_ilp32_compat_{task, thread} and TIF_32BIT_AARCH64 Yury Norov
2018-05-16  8:18 ` [PATCH 13/24] arm64: introduce binfmt_elf32.c Yury Norov
2018-05-16  8:18 ` [PATCH 14/24] arm64: change compat_elf_hwcap and compat_elf_hwcap2 prefix to a32 Yury Norov
2018-05-16  8:19 ` [PATCH 15/24] arm64: ilp32: introduce binfmt_ilp32.c Yury Norov
2018-05-16  8:19 ` [PATCH 16/24] arm64: ilp32: share aarch32 syscall handlers Yury Norov
2018-05-16  8:19 ` [PATCH 17/24] arm64: ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it Yury Norov
2018-05-16  8:19 ` [PATCH 18/24] arm64: signal: share lp64 signal structures and routines to ilp32 Yury Norov
2018-05-16  8:19 ` [PATCH 19/24] arm64: signal32: move ilp32 and aarch32 common code to separated file Yury Norov
2018-05-16  8:19 ` [PATCH 20/24] arm64: ilp32: introduce ilp32-specific sigframe and ucontext Yury Norov
2018-05-16  8:19 ` [PATCH 21/24] arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32 Yury Norov
2018-05-16  8:19 ` [PATCH 22/24] arm64:ilp32: add vdso-ilp32 and use for signal return Yury Norov
2019-09-30  7:24   ` Andreas Schwab
2018-05-16  8:19 ` [PATCH 23/24] arm64:ilp32: add ARM64_ILP32 to Kconfig Yury Norov
2018-05-16  8:19 ` [PATCH 24/24] arm64: ilp32: Make the Kconfig option default y Yury Norov
2018-07-24 17:39 ` [PATCH v9 00/24] ILP32 for ARM64 Yury Norov
2018-07-25  9:48   ` Andreas Schwab
2018-10-10 14:10   ` Eugene Syromiatnikov
2018-10-10 14:18     ` Arnd Bergmann
2018-10-10 14:39     ` Szabolcs Nagy
2018-10-13  2:07       ` Eugene Syromiatnikov
2018-10-13  9:20         ` Catalin Marinas
2018-10-14 19:53         ` Arnd Bergmann
2018-10-10 15:36     ` Catalin Marinas
2018-10-13  2:14       ` Eugene Syromiatnikov
2018-10-13  9:34         ` Catalin Marinas
2018-10-13 13:43           ` Yury Norov
2018-10-13 16:54           ` Andy Lutomirski
2018-11-13 10:04   ` Andreas Schwab
2018-11-13 10:57     ` Yury Norov
2018-11-15  0:51       ` Catalin Marinas
2018-11-15  8:54         ` Andreas Schwab
2018-11-15 20:27           ` Yury Norov
2018-11-19  9:57             ` Andreas Schwab
2018-10-13 19:36 ` Andy Lutomirski
2018-10-14 19:49   ` Arnd Bergmann
2018-10-18 11:14     ` Catalin Marinas
2018-11-19 21:29 ` Yury Norov
2019-01-07 15:50 ` Yuri Norov
     [not found]   ` <DC9A951E-B638-4820-8499-02D5322E7DF7@amacapital.net>
2019-01-07 20:43     ` Yuri Norov
2019-01-08 21:18   ` [PATCH] arm64: introduce AUDIT_ARCH_AARCH64ILP32 for ilp32 Yuri Norov
2019-03-05 20:56 ` [PATCH v9 00/24] ILP32 for ARM64 Yury Norov
2019-05-08 22:59 ` Yury Norov
2019-05-08 23:10   ` Yury Norov
2019-05-13  8:48   ` Andreas Schwab
2019-05-13 20:16     ` [EXT] " Yuri Norov
     [not found]       ` <20190514104311.GA24708@rei>
2019-05-14 23:01         ` [LTP] " Yury Norov
2019-05-14 23:41         ` Yury Norov
2019-07-09 22:42 ` Yury Norov

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