linux-kernel - Re: [PATCH v2 2/5] KVM: SVM: allow to force AVIC to be enabled

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Date:   Wed, 5 Jan 2022 17:46:34 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Maxim Levitsky <mlevitsk@...hat.com>
Cc:     kvm@...r.kernel.org, Jim Mattson <jmattson@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Joerg Roedel <joro@...tes.org>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Borislav Petkov <bp@...en8.de>, linux-kernel@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH v2 2/5] KVM: SVM: allow to force AVIC to be enabled

On Wed, Jan 05, 2022, Maxim Levitsky wrote:
> On Tue, 2022-01-04 at 22:25 +0000, Sean Christopherson wrote:
> > This is all more than a bit terrifying, though I can see the usefuless for a
> > developer.  At the very least, this should taint the kernel.  This should also
> > probably be buried behind a Kconfig that is itself buried behind EXPERT.
> > 
> I used 'module_param_unsafe' which does taint the kernel.

Ah, neat, TIL.  Thanks!