linux-kernel - Re: [PATCH v4 00/31] ARM: Switch to generic entry

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Message-ID: <CACRpkdbmOiapucnzyd9-x4WJsRBs2pRdcgZ2-AoN3bdkNJaW_A@mail.gmail.com>
Date: Thu, 20 Feb 2025 15:04:22 +0100
From: Linus Walleij <linus.walleij@...aro.org>
To: "Dmitry V. Levin" <ldv@...ace.io>
Cc: Dmitry Vyukov <dvyukov@...gle.com>, Oleg Nesterov <oleg@...hat.com>, 
	Eugene Syromyatnikov <evgsyr@...il.com>, Russell King <linux@...linux.org.uk>, Kees Cook <kees@...nel.org>, 
	Andy Lutomirski <luto@...capital.net>, Will Drewry <wad@...omium.org>, 
	Frederic Weisbecker <frederic@...nel.org>, "Paul E. McKenney" <paulmck@...nel.org>, 
	Jinjie Ruan <ruanjinjie@...wei.com>, Arnd Bergmann <arnd@...db.de>, Ard Biesheuvel <ardb@...nel.org>, 
	Al Viro <viro@...iv.linux.org.uk>, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 00/31] ARM: Switch to generic entry

On Fri, Feb 14, 2025 at 12:05 PM Dmitry V. Levin <ldv@...ace.io> wrote:

> > Sure, where can I find this test suite?
>
> It's a part of strace, you can find it e.g. at
> https://github.com/strace/strace
>
> To build and run it one can roughly do
> ./bootstrap && ./configure && make -j`nproc` && make -j`nproc check

make check produces some test failures on v6.14-rc1 on ARM
even before I apply the generic entry:

FAIL: filtering_syscall-syntax.test
FAIL: qual_fault-syscall.test
FAIL: qual_fault.test
FAIL: strace--tips-full.test
FAIL: strace-r.test
============================================================================
Testsuite summary for strace 6.13.0.27.bbda4
============================================================================
# TOTAL: 1409
# PASS:  1106
# SKIP:  298
# XFAIL: 0
# FAIL:  5
# XPASS: 0
# ERROR: 0
============================================================================

But I create more fails after my patch set ...
Some have to do with fast syscall restart (I need to look into this).

Then there is the fact that I had to add the  PTRACE_SYSEMU and
PTRACE_SYSEMU_SINGLESTEP as stubs returning -EIO
(modeled after UM) to use generic entry. Do you think this affects
the results?

Is there a way to run a single test? I tried to check the docs but
nothing obvious to me ... I guess I'm not used to this unit-tester.

Yours,
Linus Walleij