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Subject: Re: [RFC v2 26/32] x86/mm: Move force_dma_unencrypted() to common
 code
To:     Dave Hansen <dave.hansen@intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Andy Lutomirski <luto@kernel.org>,
        Dan Williams <dan.j.williams@intel.com>,
        Tony Luck <tony.luck@intel.com>
Cc:     Andi Kleen <ak@linux.intel.com>,
        Kirill Shutemov <kirill.shutemov@linux.intel.com>,
        Kuppuswamy Sathyanarayanan <knsathya@kernel.org>,
        Raj Ashok <ashok.raj@intel.com>,
        Sean Christopherson <seanjc@google.com>,
        linux-kernel@vger.kernel.org
References: <cover.1619458733.git.sathyanarayanan.kuppuswamy@linux.intel.com>
 <7c5adf75d69ea327b22b404b7c37b29712d73640.1619458733.git.sathyanarayanan.kuppuswamy@linux.intel.com>
 <5536639a-918d-de8d-ff32-934a13902a03@intel.com>
From:   "Kuppuswamy, Sathyanarayanan" 
        <sathyanarayanan.kuppuswamy@linux.intel.com>
Message-ID: <d04e5992-8800-a8df-99de-4dbb40e45d09@linux.intel.com>
Date:   Mon, 10 May 2021 15:19:10 -0700
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On 5/7/21 2:54 PM, Dave Hansen wrote:
> This doesn't seem much like common code to me.  It seems like 100% SEV
> code.  Is this really where we want to move it?

Both SEV and TDX code has requirement to enable
CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED and define force_dma_unencrypted()
function.

force_dma_unencrypted() is modified by patch titled "x86/tdx: Make DMA
pages shared" to add TDX guest specific support.

Since both SEV and TDX code uses it, its moved to common file.

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer