linux-kernel - RE: [PATCH] ARC: guard dsp early init against non ARCv2

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <BN8PR12MB3266393BD37EAABBF45D8AEFD3AD0@BN8PR12MB3266.namprd12.prod.outlook.com>
Date:   Wed, 29 Apr 2020 06:19:55 +0000
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>,
        "linux-snps-arc@...ts.infradead.org" 
        <linux-snps-arc@...ts.infradead.org>,
        Vineet Gupta <Vineet.Gupta1@...opsys.com>
CC:     Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
        Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Angelo Ribeiro <Angelo.Ribeiro@...opsys.com>
Subject: RE: [PATCH] ARC: guard dsp early init against non ARCv2

From: Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
Date: Apr/28/2020, 19:50:24 (UTC+00:00)

> As of today we guard early DSP init code with
> ARC_AUX_DSP_BUILD (0x7A) BCR check to verify that we have
> CPU with DSP configured. However that's not enough as in
> ARCv1 CPU the same BCR (0x7A) is used for checking MUL/MAC
> instructions presence.
> 
> So, let's guard DSP early init against non ARCv2.
> 
> Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>

Reported-by: Angelo Ribeiro 
<angelor@...opsys.com>

---
Thanks,
Jose Miguel Abreu