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Shutemov" Cc: Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Borislav Petkov , Peter Zijlstra , Andy Lutomirski , David Howells , Kees Cook , Dave Hansen , Kai Huang , Jacob Pan , Alison Schofield , linux-mm@kvack.org, kvm@vger.kernel.org, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH, RFC 52/62] x86/mm: introduce common code for mem encryption Message-ID: <20190508165830.GA11815@infradead.org> References: <20190508144422.13171-1-kirill.shutemov@linux.intel.com> <20190508144422.13171-53-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190508144422.13171-53-kirill.shutemov@linux.intel.com> User-Agent: Mutt/1.9.2 (2017-12-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, May 08, 2019 at 05:44:12PM +0300, Kirill A. Shutemov wrote: > +EXPORT_SYMBOL_GPL(__mem_encrypt_dma_set); > + > +phys_addr_t __mem_encrypt_dma_clear(phys_addr_t paddr) > +{ > + if (sme_active()) > + return __sme_clr(paddr); > + > + return paddr & ~mktme_keyid_mask; > +} > +EXPORT_SYMBOL_GPL(__mem_encrypt_dma_clear); In general nothing related to low-level dma address should ever be exposed to modules. What is your intended user for these two?