linux-kernel - Re: [PATCH] x86/cpufeatures: Force disable X86_FEATURE_ENQCMD and remove update

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20210625154641.GA1206684@agluck-desk2.amr.corp.intel.com>
Date:   Fri, 25 Jun 2021 08:46:41 -0700
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        "Yu, Fenghua" <fenghua.yu@...el.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        x86 <x86@...nel.org>,
        "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
        Ingo Molnar <mingo@...hat.com>, H Peter Anvin <hpa@...or.com>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Christoph Hellwig <hch@...radead.org>,
        Peter Zijlstra <peterz@...radead.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        "Raj, Ashok" <ashok.raj@...el.com>,
        "Pan, Jacob jun" <jacob.jun.pan@...el.com>,
        "Jiang, Dave" <dave.jiang@...el.com>,
        "Mehta, Sohil" <sohil.mehta@...el.com>,
        "Shankar, Ravi V" <ravi.v.shankar@...el.com>
Subject: Re: [PATCH] x86/cpufeatures: Force disable X86_FEATURE_ENQCMD and
 remove update_pasid()

On Wed, Jun 09, 2021 at 04:34:31PM -0700, Andy Lutomirski wrote:
> On 6/9/21 10:32 AM, Luck, Tony wrote:
> >>> I've told Fenghua to dig out the previous iteration of this patch where
> >>> the plan was to lazily fix the PASID_MSR in other threads in the #GP
> >>> handler.
> >>
> >> Blech.  Also this won't work for other PASID-like features.
> >>
> >> I have a half-written patch to fix this up for real.  Stay tuned.
> > 
> > Andy: Any update on this?
> > 
> > -Tony
> > 
> 
> Let me try to merge my pile with tglx's pile and come up with something
> halfway sane.

Looks like Thomas' pile is done (well done enough to be queued in TIP).

Can we see your "pile" soon?

-Tony