From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Martin Subject: Re: [PATCH v15 05/17] arms64: untag user pointers passed to memory syscalls Date: Tue, 28 May 2019 16:56:45 +0100 Message-ID: <20190528155644.GD28398@e103592.cambridge.arm.com> References: <00eb4c63fefc054e2c8d626e8fedfca11d7c2600.1557160186.git.andreyknvl@google.com> <20190527143719.GA59948@MBP.local> <20190528145411.GA709@e119886-lin.cambridge.arm.com> <20190528154057.GD32006@arrakis.emea.arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20190528154057.GD32006@arrakis.emea.arm.com> Sender: linux-kernel-owner@vger.kernel.org To: Catalin Marinas Cc: Andrew Murray , Mark Rutland , kvm@vger.kernel.org, Christian Koenig , Szabolcs Nagy , Will Deacon , dri-devel@lists.freedesktop.org, linux-mm@kvack.org, Lee Smith , linux-kselftest@vger.kernel.org, Vincenzo Frascino , Jacob Bramley , Leon Romanovsky , linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, Evgeniy Stepanov , linux-media@vger.kernel.org, Kees Cook , Ruben Ayrapetyan , Andrey Konovalov , Kevin Brodsky List-Id: linux-rdma@vger.kernel.org On Tue, May 28, 2019 at 04:40:58PM +0100, Catalin Marinas wrote: [...] > My thoughts on allowing tags (quick look): > > brk - no [...] > mlock, mlock2, munlock - yes > mmap - no (we may change this with MTE but not for TBI) [...] > mprotect - yes I haven't following this discussion closely... what's the rationale for the inconsistencies here (feel free to refer me back to the discussion if it's elsewhere). Cheers ---Dave