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Message-ID: <alpine.DEB.2.21.2301121150480.65308@angie.orcam.me.uk>
Date: Thu, 12 Jan 2023 11:58:04 +0000 (GMT)
From: "Maciej W. Rozycki" <macro@...am.me.uk>
To: Borislav Petkov <bp@...en8.de>
cc: "H. Peter Anvin" <hpa@...or.com>,
"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 Thu, 12 Jan 2023, Borislav Petkov 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. :)
And not even in my 2009 copy of the SDM (the 2013 one does have it), so
it must have arrived slightly later than just after the 486. ;)
Maciej
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