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

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Message-ID: <1caf0cd7-a419-442e-59bd-f1189685742c@amd.com>
Date:   Thu, 11 Mar 2021 15:50:37 -0600
From:   Babu Moger <babu.moger@....com>
To:     Borislav Petkov <bp@...en8.de>, Jim Mattson <jmattson@...gle.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>,
        "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 3/11/21 3:36 PM, Borislav Petkov wrote:
> On Thu, Mar 11, 2021 at 01:23:47PM -0800, Jim Mattson wrote:
>> I would expect kaiser_enabled to be false (and PCIDs not to be used),
>> since AMD CPUs are not vulnerable to Meltdown.
> 
> Ah, of course. The guest dmesg should have
> 
> "Kernel/User page tables isolation: disabled."

yes.
 #dmesg |grep isolation
[    0.000000] Kernel/User page tables isolation: disabled

> 
> Lemme see if I can reproduce.
>