linux-kernel - RE: [v3] x86/tsc: Unset TSC_KNOWN_FREQ and TSC

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, 29 Jan 2020 15:14:05 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Hans de Goede' <hdegoede@...hat.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
CC:     Thomas Gleixner <tglx@...utronix.de>,
        vipul kumar <vipulk0511@...il.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Stable <stable@...r.kernel.org>,
        "Srikanth Krishnakar" <Srikanth_Krishnakar@...tor.com>,
        Cedric Hombourger <Cedric_Hombourger@...tor.com>,
        "x86@...nel.org" <x86@...nel.org>, Len Brown <len.brown@...el.com>,
        Vipul Kumar <vipul_kumar@...tor.com>
Subject: RE: [v3] x86/tsc: Unset TSC_KNOWN_FREQ and TSC_RELIABLE flags on
 Intel Bay Trail SoC

From: Hans de Goede
> Sent: 29 January 2020 14:28
...
> > Btw, why we are mentioning 20 / 6 and 28 / 6 when arithmetically
> > it's the same as 10 / 3 and 14 / 3?
> 
> I copied the BYT values from Thomas' email and I guess he did not
> get around to simplifying them, I'll use the simplified versions
> for my patch.

If those multiplier/divider values came from either official docs or
hardware registers I'd not simplify them.

	David

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)