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Date:   Wed, 6 Oct 2021 12:34:40 -0700
From:   Josh Poimboeuf <jpoimboe@redhat.com>
To:     Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@linux.intel.com>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        x86@kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
        David Hildenbrand <david@redhat.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Juergen Gross <jgross@suse.com>, Deep Shah <sdeep@vmware.com>,
        VMware Inc <pv-drivers@vmware.com>,
        Vitaly Kuznetsov <vkuznets@redhat.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        Jim Mattson <jmattson@google.com>,
        Joerg Roedel <joro@8bytes.org>, Peter H Anvin <hpa@zytor.com>,
        Dave Hansen <dave.hansen@intel.com>,
        Tony Luck <tony.luck@intel.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Andi Kleen <ak@linux.intel.com>,
        Kirill Shutemov <kirill.shutemov@linux.intel.com>,
        Sean Christopherson <seanjc@google.com>,
        Kuppuswamy Sathyanarayanan <knsathya@kernel.org>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v8 08/11] x86/tdx: Wire up KVM hypercalls
Message-ID: <20211006193440.jgmagja3vynqnnis@treble>
References: <20211005025205.1784480-1-sathyanarayanan.kuppuswamy@linux.intel.com>
 <20211005025205.1784480-9-sathyanarayanan.kuppuswamy@linux.intel.com>
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On Mon, Oct 04, 2021 at 07:52:02PM -0700, Kuppuswamy Sathyanarayanan wrote:
>  static inline long kvm_hypercall0(unsigned int nr)
>  {
>  	long ret;
> +
> +	if (cc_platform_has(CC_ATTR_GUEST_TDX))
> +		return tdx_kvm_hypercall(nr, 0, 0, 0, 0);

Hm, I'm still thinking that figuring out a way to convert all the
cc_platform_has() stuff to normal cpu features -- or at least inline
wrappers around them -- would be really nice here.  Then this could just
be a nice fast static_cpu_has().

-- 
Josh