linux-kernel - Re: [PATCH RFC 1/5] cpu/speculation: Add 'cpu_spec

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Message-ID: <87sguqwgu7.fsf@concordia.ellerman.id.au>
Date:   Wed, 10 Apr 2019 15:48:48 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Josh Poimboeuf <jpoimboe@...hat.com>,
        Borislav Petkov <bp@...en8.de>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>,
        "H . Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Jiri Kosina <jikos@...nel.org>,
        Waiman Long <longman@...hat.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Jon Masters <jcm@...hat.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev@...ts.ozlabs.org,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        linux-s390@...r.kernel.org,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-arch@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Tyler Hicks <tyhicks@...onical.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH RFC 1/5] cpu/speculation: Add 'cpu_spec_mitigations=' cmdline options

Josh Poimboeuf <jpoimboe@...hat.com> writes:

> On Fri, Apr 05, 2019 at 06:01:36PM +0200, Borislav Petkov wrote:
>> Thinking about this more, we can shave off the first 4 chars and have it
>> be:
>> 
>> spec_mitigations=
>> 
>> I think it is painfully clear which speculation mitigations we mean. And
>> the other switches don't have "cpu_" prefixes too so...
>
> Sure, I'm ok with renaming it to that, if there are no objections.

What about when we have a mitigation for a non-speculation related bug :)

mitigations=xxx

?

cheers