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Peter Anvin" , Baoquan He , Ingo Molnar , Thomas Gleixner , Chao Fan , linux-kernel@vger.kernel.org, x86@kernel.org, linux-efi@vger.kernel.org, linux-acpi@vger.kernel.org, mingo@redhat.com, keescook@chromium.org, rjw@rjwysocki.net, lenb@kernel.org, ard.biesheuvel@linaro.org, indou.takao@jp.fujitsu.com, caoj.fnst@cn.fujitsu.com Subject: Re: [PATCH v8 0/3] x86/boot/KASLR: Parse ACPI table and limit kaslr in immovable memory Message-ID: <20181111134556.qxv2v4g7dl5irzo7@gabell> References: <20181016195902.GK5212@zn.tnic> <20181022154204.kagmdb55jtoez4ca@gabell> <20181025103345.GF14020@nazgul.tnic> <20181025134050.ggiir77ehntikbwg@gabell> <20181106184519.GA16391@zn.tnic> <20181106193636.svyjwuwrlgnpuyyf@gabell> <20181106204511.GO13712@zn.tnic> <20181106222133.lb7674yzszivzihd@gabell> <20181108105129.GA7543@zn.tnic> <20181110105422.GA20023@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181110105422.GA20023@zn.tnic> User-Agent: NeoMutt/20180716 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Nov 10, 2018 at 11:54:22AM +0100, Borislav Petkov wrote: > On Thu, Nov 08, 2018 at 11:51:29AM +0100, Borislav Petkov wrote: > > A global definition which doesn't need allocation? > > > > Maybe hpa would have another, better idea... > > ...and he has: just put that address in a new field in struct > boot_params by converting one of the padding arrays there. > > Don't forget to document it in Documentation/x86/zero-page.txt > > This way you don't need any of the allocation fun or to use setup_data > at all. Thanks! I have the prototype patch to use boot_params [1]. I will try to brush up it. [1] https://lore.kernel.org/lkml/20181016151353.punyk7exekut2543@gabell Thanks, Masa