linux-kernel - Re: [GIT pull] x86/urgent for 5.3-rc5

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Message-ID: <20190825173000.GB20639@zn.tnic>
Date:   Sun, 25 Aug 2019 19:30:00 +0200
From:   Borislav Petkov <bp@...e.de>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Tom Lendacky <thomas.lendacky@....com>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        the arch/x86 maintainers <x86@...nel.org>
Subject: Re: [GIT pull] x86/urgent for 5.3-rc5

On Sun, Aug 25, 2019 at 10:18:02AM -0700, Linus Torvalds wrote:
> Not doing the Zen 2 boot-time case? Everybody assumes that all
> firmware has been fixed?

My info is that all Zen has been taken care of with fw fixes.

> That one should be easy to verify since it happens at boot: just do
> "rdrand" twice, and if it returns all-ones both times, it's broken.

Should we do that somewhere in the early boot code by adding a WARN_ON()
or so and see who screams?

-- 
Regards/Gruss,
    Boris.

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