From: Kees Cook <keescook@chromium.org>
To: Nick Desaulniers <ndesaulniers@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H . Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
llvm@lists.linux.dev, Andy Lutomirski <luto@kernel.org>
Subject: Re: [PATCH v2] x86, mem: move memmove to out of line assembler
Date: Tue, 27 Sep 2022 13:36:08 -0700 [thread overview]
Message-ID: <202209271333.10AE3E1D@keescook> (raw)
In-Reply-To: <CAKwvOdk1QM4iZqEVj5MzTW3jMr1FiD_0C065Kub=EHKnH+xNaw@mail.gmail.com>
On Tue, Sep 27, 2022 at 01:01:35PM -0700, Nick Desaulniers wrote:
> > Found it (need to use %di instead of %dx). With this changed, the kunit
> > test passes again:
> >
>
> That was stupid of me, I updated the scratch register operand in the
> instruction 2 before the one at issue and forgot to update the operand
> for the register in question, breaking the swap.
No worries! It meant I got to do a very careful review of the port. :)
> Off thread, can you show me how to run the kunit tests, please?
It's literally just what I put in the original email. KUnit is super
easy to use. In the root of the kernel source tree, just run:
./tools/testing/kunit/kunit.py run --arch=i386 memcpy
Without --arch, it'll default to um.
--
Kees Cook
next prev parent reply other threads:[~2022-09-27 20:36 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-23 17:02 [PATCH] x86, mem: move memmove to out of line assembler Nick Desaulniers
2022-09-23 17:29 ` Linus Torvalds
2022-09-23 17:55 ` Nick Desaulniers
2022-09-23 18:05 ` Linus Torvalds
2022-09-27 17:03 ` Nick Desaulniers
2022-09-27 17:28 ` [PATCH v2] " Nick Desaulniers
2022-09-27 18:41 ` Kees Cook
2022-09-27 19:23 ` Kees Cook
2022-09-27 20:01 ` Nick Desaulniers
2022-09-27 20:36 ` Kees Cook [this message]
2022-09-27 21:02 ` [PATCH v3] " Nick Desaulniers
2022-09-27 21:14 ` Kees Cook
2022-09-28 7:24 ` Rasmus Villemoes
2022-09-28 19:00 ` Linus Torvalds
2022-09-28 19:06 ` Nick Desaulniers
2022-09-28 20:49 ` Nick Desaulniers
2022-09-28 21:05 ` [PATCH v4] " Nick Desaulniers
2022-09-28 22:03 ` Kees Cook
2022-09-29 7:01 ` Ingo Molnar
2022-09-29 8:02 ` Ingo Molnar
2022-09-29 17:26 ` Nick Desaulniers
2022-09-30 9:55 ` David Laight
2022-09-30 16:43 ` Nick Desaulniers
2022-09-30 16:46 ` Linus Torvalds
2022-09-30 18:55 ` [PATCH v5] " Nick Desaulniers
2022-09-30 10:14 ` [PATCH v4] " David Laight
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