linux-kernel - Re: [patch 0/6] Cure kexec() vs. mwait_play

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Message-ID: <ZIyzNDS3BLGsv4PC@google.com>
Date:   Fri, 16 Jun 2023 12:08:36 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Ashok Raj <ashok.raj@...el.com>
Cc:     Ashok Raj <ashok_raj@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
        Ashok Raj <ashok.raj@...ux.intel.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Tony Luck <tony.luck@...el.com>,
        Arjan van de Veen <arjan@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Eric Biederman <ebiederm@...ssion.com>,
        Vijay Dhanraj <vijay.dhanraj@...el.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Laszlo Ersek <lersek@...hat.com>,
        Gerd Hoffmann <kraxel@...hat.com>,
        Andrea Bolognani <abologna@...hat.com>,
        "Daniel P. Berrangé" <berrange@...hat.com>
Subject: Re: [patch 0/6] Cure kexec() vs. mwait_play_dead() troubles

On Fri, Jun 16, 2023, Ashok Raj wrote:
> On Fri, Jun 16, 2023 at 12:00:13PM -0700, Sean Christopherson wrote:
> > > Would this qualify for the smoke test pass? I'll continue to look for a
> > > secure boot install if this doesn't close it, just haven't landed at the
> > > right spot yet.
> > 
> > Good enough for me, thanks much!
> 
> Thanks a ton Sean.. if anything you have now scared me there is life for
> SMM afterall even in a guest :-)

LOL, you and me both.  Thankfully GCE's implementation of Secure Boot for VMs
doesn't utilize SMM, so to a large extent I can close my eyes and plug my ears :-)