linux-kernel - Re: [PATCH RFC v9 05/51] x86/coco: move CONFIG_HAS_CC

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Date:   Mon, 12 Jun 2023 10:07:39 +0300
From:   "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>
To:     Michael Roth <michael.roth@....com>, bp@...en8.de
Cc:     kvm@...r.kernel.org, linux-coco@...ts.linux.dev,
        linux-mm@...ck.org, linux-crypto@...r.kernel.org, x86@...nel.org,
        linux-kernel@...r.kernel.org, tglx@...utronix.de, mingo@...hat.com,
        jroedel@...e.de, thomas.lendacky@....com, hpa@...or.com,
        ardb@...nel.org, pbonzini@...hat.com, seanjc@...gle.com,
        vkuznets@...hat.com, jmattson@...gle.com, luto@...nel.org,
        dave.hansen@...ux.intel.com, slp@...hat.com, pgonda@...gle.com,
        peterz@...radead.org, srinivas.pandruvada@...ux.intel.com,
        rientjes@...gle.com, dovmurik@...ux.ibm.com, tobin@....com,
        vbabka@...e.cz, kirill@...temov.name, ak@...ux.intel.com,
        tony.luck@...el.com, marcorr@...gle.com,
        sathyanarayanan.kuppuswamy@...ux.intel.com, alpergun@...gle.com,
        dgilbert@...hat.com, jarkko@...nel.org, ashish.kalra@....com,
        nikunj.dadhania@....com, liam.merwick@...cle.com,
        zhi.a.wang@...el.com, kai.huang@...el.com, isaku.yamahata@...el.com
Subject: Re: [PATCH RFC v9 05/51] x86/coco: move CONFIG_HAS_CC_PLATFORM check
 down into coco/Makefile

On Sun, Jun 11, 2023 at 11:25:13PM -0500, Michael Roth wrote:
> Currently CONFIG_HAS_CC_PLATFORM is a prereq for building anything in
> arch/x86/coco, but that is generally only applicable for guest support.
> 
> For SEV-SNP, helpers related purely to host support will also live in
> arch/x86/coco. To allow for CoCo-related host support code in
> arch/x86/coco, move that check down into the Makefile and check for it
> specifically when needed.

Hm. TDX host support uses arch/x86/virt/vmx/tdx/. I think we need to be
consistent here.

IIRC, Borislav proposed the scheme that TDX uses.


-- 
  Kiryl Shutsemau / Kirill A. Shutemov