linux-kernel - Re: [PATCH v6 00/12] SVM cleanup and INVPCID feature support

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Message-ID: <CALMp9eQBY50kZT6WdM-D2gmUgDZmCYTn+kxcxk8EQTg=SygLKA@mail.gmail.com>
Date:   Wed, 20 Jan 2021 13:14:17 -0800
From:   Jim Mattson <jmattson@...gle.com>
To:     Babu Moger <babu.moger@....com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        kvm list <kvm@...r.kernel.org>, Joerg Roedel <joro@...tes.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Makarand Sonare <makarandsonare@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>
Subject: Re: [PATCH v6 00/12] SVM cleanup and INVPCID feature support

On Tue, Jan 19, 2021 at 3:45 PM Babu Moger <babu.moger@....com> wrote:
>
>
>
> On 1/19/21 5:01 PM, Jim Mattson wrote:
> > On Mon, Sep 14, 2020 at 11:33 AM Babu Moger <babu.moger@....com> wrote:
> >
> >> Thanks Paolo. Tested Guest/nested guest/kvm units tests. Everything works
> >> as expected.
> >
> > Debian 9 does not like this patch set. As a kvm guest, it panics on a
> > Milan CPU unless booted with 'nopcid'. Gmail mangles long lines, so
> > please see the attached kernel log snippet. Debian 10 is fine, so I
> > assume this is a guest bug.
> >
>
> We had an issue with PCID feature earlier. This was showing only with SEV
> guests. It is resolved recently. Do you think it is not related that?
> Here are the patch set.
> https://lore.kernel.org/kvm/160521930597.32054.4906933314022910996.stgit@bmoger-ubuntu/

The Debian 9 release we tested is not an SEV guest.