linux-kernel - Re: [PATCH v8 02/11] x86/tdx: Introduce INTEL_TDX

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Message-ID: <YVxdhtRbJfd9feA4@zn.tnic>
Date:   Tue, 5 Oct 2021 16:13:26 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Sathyanarayanan Kuppuswamy Natarajan 
        <sathyanarayanan.nkuppuswamy@...il.com>
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        David Hildenbrand <david@...hat.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Juergen Gross <jgross@...e.com>, Deep Shah <sdeep@...are.com>,
        VMware Inc <pv-drivers@...are.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, Peter H Anvin <hpa@...or.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Tony Luck <tony.luck@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Kirill Shutemov <kirill.shutemov@...ux.intel.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 02/11] x86/tdx: Introduce INTEL_TDX_GUEST config option

On Tue, Oct 05, 2021 at 06:29:43AM -0700, Sathyanarayanan Kuppuswamy Natarajan wrote:
> For the TDX guest, x2apic will be emulated. So it will exist in our
> case. Even if x2apic or TDX guest is not supported by CPU, it will
> boot just fine.

Sure but why is it "select" and not "depends"?

Why does X86_X2APIC need to be selected while the others are "depends"?

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette