linux-kernel - CONFIG_ARCH_SUPPORTS

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-next>] [day] [month] [year] [list]

Date:   Tue, 31 Oct 2017 11:17:52 +0100
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     linux-arm-kernel@...ts.infradead.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: CONFIG_ARCH_SUPPORTS_INT128 for AArch64

Hi folks,

Older versions of gcc are horrible for int128_t on aarch64, emitting a
__multi3 call, which is slow and defeats the purpose. However, more
recent versions of gcc (since 5, IIRC), do the right thing and produce
the proper inlined instructions.

Do we have the infrastructure available to test for this, and
conditionally set CONFIG_ARCH_SUPPORTS_INT128 if we do?

Thanks,
Jason