linux-kernel - Re: [PATCH v2] x86: Disable kernel stack offset randomization for !TSC

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Message-ID: <Y7/vYry8Va+NJpxA@zn.tnic>
Date:   Thu, 12 Jan 2023 12:30:42 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     "H. Peter Anvin" <hpa@...or.com>
Cc:     "Maciej W. Rozycki" <macro@...am.me.uk>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] x86: Disable kernel stack offset randomization for
 !TSC

On Wed, Jan 11, 2023 at 05:53:37PM -0800, H. Peter Anvin wrote:
> Not to mention that we could use rdrand here if it is available (although it
> is slower than rdtsc.)

Yeah, no RDRAND on 486. :)

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette