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Tsirkin" To: Andi Kleen Subject: Re: [PATCH v5 12/16] PCI: Add pci_iomap_host_shared(), pci_iomap_host_shared_range() Message-ID: <20211011142956-mutt-send-email-mst@kernel.org> References: <20211009003711.1390019-1-sathyanarayanan.kuppuswamy@linux.intel.com> <20211009003711.1390019-13-sathyanarayanan.kuppuswamy@linux.intel.com> MIME-Version: 1.0 In-Reply-To: Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mst@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Cc: Kuppuswamy Sathyanarayanan , Kuppuswamy Sathyanarayanan , Peter Zijlstra , linux-pci@vger.kernel.org, linux-mips@vger.kernel.org, James E J Bottomley , Dave Hansen , Peter H Anvin , sparclinux@vger.kernel.org, Dan Williams , Andrea Arcangeli , Jonathan Corbet , Helge Deller , x86@kernel.org, Christoph Hellwig , Ingo Molnar , linux-arch@vger.kernel.org, Arnd Bergmann , Tony Luck , Borislav Petkov , Andy Lutomirski , Josh Poimboeuf , Bjorn Helgaas , Thomas Gleixner , virtualization@lists.linux-foundation.org, Richard Henderson , Thomas Bogendoerfer , linux-parisc@vger.kernel.org, Sean Christopherson , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, Paolo Bonzini , "David S . Miller" , Kirill Shutemov X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" On Mon, Oct 11, 2021 at 10:23:00AM -0700, Andi Kleen wrote: > > On 10/11/2021 12:58 AM, Christoph Hellwig wrote: > > Just as last time: This does not make any sense. ioremap is shared > > by definition. > > It's not necessarily shared with the host for confidential computing: for > example BIOS mappings definitely should not be shared, but they're using > ioremap today. That just needs to be fixed. > But if you have a better term please propose something. I tried to clarify > it with "shared_host", but I don't know a better term. > > > -Andi > The reason we have trouble is that it's not clear what does the API mean outside the realm of TDX. If we really, truly want an API that says "ioremap and it's a hardened driver" then I guess ioremap_hardened_driver is what you want. -- MST _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization