linux-kernel - Re: [PATCH] x86/speculation: Clean up various Spectre related details

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Message-ID: <1518449413.6606.99.camel@infradead.org>
Date:   Mon, 12 Feb 2018 15:30:13 +0000
From:   David Woodhouse <dwmw2@...radead.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org, tglx@...utronix.de,
        karahmed@...zon.de, sironi@...zon.de, kvm@...r.kernel.org,
        torvalds@...ux-foundation.org, pbonzini@...hat.com, bp@...en8.de,
        peterz@...radead.org, jmattson@...gle.com, rkrcmar@...hat.com,
        arjan.van.de.ven@...el.com, dave.hansen@...el.com
Subject: Re: [PATCH] x86/speculation: Clean up various Spectre related
 details



On Sun, 2018-02-11 at 20:43 +0100, Ingo Molnar wrote:
> > And should these say 'Spectre v2' not just 'Spectre'?
> 
> Yeah, you are probably right, but I didn't want to make the messages too specific 
> - do we really know that this is the end of Spectre-style speculation holes?

Well... if a new problem is also remedied by use if IBRS/IBPB and
retpoline, I think we can happily call it a subclass of "Spectre v2".

And if it *isn't* addressed by those same things, then it's clearly
something different. Either way, these messages should be 'v2', no?

On the whole though, there are plenty of better things to be worrying
about :)

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