linux-kernel - Re: [patch 0/2] x86: Prevent Split-Lock-Detection wreckage on VMX hypervisors

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Message-ID: <20200402143203.GJ20713@hirez.programming.kicks-ass.net>
Date:   Thu, 2 Apr 2020 16:32:03 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Kenneth R. Crudup" <kenny@...ix.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Jessica Yu <jeyu@...nel.org>,
        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>
Subject: Re: [patch 0/2] x86: Prevent Split-Lock-Detection wreckage on VMX
 hypervisors

On Thu, Apr 02, 2020 at 06:43:19AM -0700, Kenneth R. Crudup wrote:
> 
> On Thu, 2 Apr 2020, Thomas Gleixner wrote:
> 
> > As Peter and myself don't have access to a SLD enabled machine, the
> > KVM/VMX part is untested. The module scan part works.
> 
> I just applied both of these patches to my (Linus' tip) tree, and unfortunately
> VMWare still hangs if split_lock_detect= is set to anything but "off".
> 
> Was there anything else I'd needed to do?

Hmm, you're not seeing this:

  +       pr_warn("disabled due to VMLAUNCH in module: %s\n", me->name);

fire when you load the vmware kernel module? Could you slip me a copy of
that thing by private mail?