linux-kernel - Re: [patch 1/2] x86,module: Detect VMX modules and disable Split-Lock-Detect

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Message-ID: <87a73skzo0.fsf@nanos.tec.linutronix.de>
Date:   Fri, 03 Apr 2020 23:49:35 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Andy Lutomirski <luto@...capital.net>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Jessica Yu <jeyu@...nel.org>,
        Rasmus Villemoes <rasmus.villemoes@...vas.dk>,
        LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
        "Kenneth R. Crudup" <kenny@...ix.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Xiaoyao Li <xiaoyao.li@...el.com>,
        Nadav Amit <namit@...are.com>,
        Thomas Hellstrom <thellstrom@...are.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Tony Luck <tony.luck@...el.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        jannh@...gle.com, keescook@...omium.org, vbox-dev@...tualbox.org
Subject: Re: [patch 1/2] x86,module: Detect VMX modules and disable Split-Lock-Detect

Andy Lutomirski <luto@...capital.net> writes:
>> On Apr 3, 2020, at 11:54 AM, Thomas Gleixner <tglx@...utronix.de> wrote:
>> Peter Zijlstra <peterz@...radead.org> writes:
>> Enough vented, but that still does not solve the SLD problem in any
>> sensible way.
>
> Could we unexport set_memory_x perhaps?  And maybe try to make
> virtualbox break in as many ways as possible?

set_memory_x() is not exported anymore, but they found new ways of
circumvention. set_memory_x() is only used on really old kernels.

Thanks,

        tglx