linux-kernel - Re: [RFC v2 10/32] x86/tdx: Wire up KVM hypercalls

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Message-ID: <25e248b2-06f7-a450-4c9f-e90e0f0be56e@linux.intel.com>
Date:   Wed, 12 May 2021 07:10:41 -0700
From:   "Kuppuswamy, Sathyanarayanan" 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
To:     "Kirill A. Shutemov" <kirill@...temov.name>
Cc:     Dave Hansen <dave.hansen@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Tony Luck <tony.luck@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Kirill Shutemov <kirill.shutemov@...ux.intel.com>,
        Kuppuswamy Sathyanarayanan <knsathya@...nel.org>,
        Raj Ashok <ashok.raj@...el.com>,
        Sean Christopherson <seanjc@...gle.com>,
        linux-kernel@...r.kernel.org,
        Isaku Yamahata <isaku.yamahata@...el.com>
Subject: Re: [RFC v2 10/32] x86/tdx: Wire up KVM hypercalls



On 5/12/21 6:00 AM, Kirill A. Shutemov wrote:
> This has to be compiled only for TDX+KVM.

Got it. So if we want to remove the "C" file include, we will have to
add #ifdef CONFIG_KVM_GUEST in Makefile.

ifdef CONFIG_KVM_GUEST
obj-$(CONFIG_INTEL_TDX_GUEST) += tdx-kvm.o
#endif

Dave, do you prefer above change over "C" file include?

  25 #ifdef CONFIG_KVM_GUEST
  26 #include "tdx-kvm.c"
  27 #endif

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer