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

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Message-ID: <bb2315e3-1c24-c5ae-3947-27c5169a9d47@amd.com>
Date:   Tue, 19 Jan 2021 17:45:38 -0600
From:   Babu Moger <babu.moger@....com>
To:     Jim Mattson <jmattson@...gle.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.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>
Subject: Re: [PATCH v6 00/12] SVM cleanup and INVPCID feature support



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/