Subject: Re: [PATCH] x86/paravirt: Fix build PARAVIRT_XXL=y without XEN_PV
To:     "Kirill A. Shutemov" <kirill@shutemov.name>,
        Peter Zijlstra <peterz@infradead.org>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Andi Kleen <ak@linux.intel.com>,
        Dave Hansen <dave.hansen@intel.com>, x86@kernel.org,
        linux-kernel@vger.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Juergen Gross <jgross@suse.com>, Deep Shah <sdeep@vmware.com>,
        "VMware, Inc." <pv-drivers@vmware.com>
References: <20211117181439.4368-1-kirill.shutemov@linux.intel.com>
 <YZVLVfd5E6d6YQig@hirez.programming.kicks-ass.net>
 <20211117184225.6e257nfpdd2qhrj4@box.shutemov.name>
From:   Sathyanarayanan Kuppuswamy 
        <sathyanarayanan.kuppuswamy@linux.intel.com>
Message-ID: <4824bf30-851e-c927-a50f-87fa2a429b2a@linux.intel.com>
Date:   Wed, 17 Nov 2021 10:46:30 -0800
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On 11/17/21 10:42 AM, Kirill A. Shutemov wrote:
> On Wed, Nov 17, 2021 at 07:35:01PM +0100, Peter Zijlstra wrote:
>> On Wed, Nov 17, 2021 at 09:14:39PM +0300, Kirill A. Shutemov wrote:
>>> TDX is going to use CONFIG_PARAVIRT_XXL
>>
>> *AARGGHHH*. srlsy? We were trying to cut back on that insanity, not
>> proliferate it.
> 
> It is a way to minimize amount of changes needed for getting TDX
> functinal. We will remove the dependency later on.
> 

TDX has a requirement to use HLT paravirt calls (which is currently
listed under PARAVIRT_XXL). Once we submit a patch to move it
under CONFIG_PARAVIRT, we will drop this dependency.

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer