From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarkko Sakkinen Subject: Re: [PATCH v17 18/23] platform/x86: Intel SGX driver Date: Tue, 18 Dec 2018 15:27:11 +0200 Message-ID: <20181218132711.GD25667@linux.intel.com> References: <7d5cde02-4649-546b-0f03-2d6414bb80b5@intel.com> <20181217180102.GA12560@linux.intel.com> <20181217183613.GD12491@linux.intel.com> <20181217184333.GA26920@linux.intel.com> <20181217222047.GG12491@linux.intel.com> <20181218013918.GC333@linux.intel.com> <20181218032702.GA2903@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Andy Lutomirski Cc: Sean Christopherson , Dave Hansen , X86 ML , Platform Driver , linux-sgx@vger.kernel.org, nhorman@redhat.com, npmccallum@redhat.com, "Ayoun, Serge" , shay.katz-zamir@intel.com, Haitao Huang , Andy Shevchenko , Thomas Gleixner , "Svahn, Kai" , mark.shanahan@intel.com, Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Darren Hart , Andy Shevchenko , "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" List-Id: platform-driver-x86.vger.kernel.org On Mon, Dec 17, 2018 at 09:02:03PM -0800, Andy Lutomirski wrote: > That's what unmap_mapping_range(), etc do for you, no? IOW make a > struct address_space that represents the logical enclave address > space, i.e. address 0 is the start and the pages count up from there. > You can unmap pages whenever you want, and the core mm code will take > care of zapping the pages from all vmas referencing that > address_space. OK, so it does. Did not have time to look at it last night (about 3AM) :-) Yes, we could use that to do the N process zapping. Based on this discussion I can take the first steps with the swapping code. And yeah, I don't think we need anon inode for this one. Can just use the dev inode (did not check in detail but on the surface looks like it). /Jarkko