linux-kernel - Re: [patch] x86: convert rdtscll() to use __native_read

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 linux-cve-announce 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:	Wed, 17 Dec 2008 00:07:12 -0800
From:	Ken Chen <kenchen@...gle.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [patch] x86: convert rdtscll() to use __native_read_tsc

On Tue, Dec 16, 2008 at 2:15 AM, Ingo Molnar <mingo@...e.hu> wrote:
> agreed mostly, with this twist: vdso inlining dependencies should be
> expressed explicitly, via:
>
>  native_vread_tsc()
>
> but we can also make native_read_tsc() __always_inline [it's a single
> instruction with basically no preparatory halo around that instruction]
> and document the vdso detail there.

Given that vdso already uses the inline version of __native_read_tsc,
we don't really have churn all that code around.  I also take your
analysis as there is no issue in converting rdtscll() to
__native_read_tsc().  Would it be possible for you to merge the patch
then?

- Ken
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/