From mboxrd@z Thu Jan 1 00:00:00 1970 From: Borislav Petkov Subject: Re: [PATCH v8 0/3] x86/boot/KASLR: Parse ACPI table and limit kaslr in immovable memory Date: Tue, 6 Nov 2018 13:10:23 +0100 Message-ID: <20181106121023.GF13712@zn.tnic> References: <20181013214550.ag5qzokhkrkwnzsy@gabell> <20181013220541.GI31650@zn.tnic> <20181015005035.z3xym6nx43hogdge@gabell> <20181016151353.punyk7exekut2543@gabell> <20181016191113.GI5212@zn.tnic> <20181016195429.tovdgqq77gz3eek2@gabell> <20181016195902.GK5212@zn.tnic> <20181022154204.kagmdb55jtoez4ca@gabell> <20181025103345.GF14020@nazgul.tnic> <20181025134050.ggiir77ehntikbwg@gabell> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Return-path: Content-Disposition: inline In-Reply-To: <20181025134050.ggiir77ehntikbwg@gabell> Sender: linux-kernel-owner@vger.kernel.org To: Masayoshi Mizuma Cc: 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, hpa@zytor.com, keescook@chromium.org, rjw@rjwysocki.net, lenb@kernel.org, ard.biesheuvel@linaro.org, indou.takao@jp.fujitsu.com, caoj.fnst@cn.fujitsu.com List-Id: linux-acpi@vger.kernel.org On Thu, Oct 25, 2018 at 09:40:51AM -0400, Masayoshi Mizuma wrote: > My actual use case is for EFI boxes, however, I think it's better to useful > for legacy BIOS as well because memory hot-plug affinity in SRAT and KASLR > are available on legacy BIOS. > Actually, we can create such environment in qemu. Ah, right, qemu. :) > I have another idea to solve this issue. Adding a SRAT parsing code > to arch/x86/mm/kaslr.c. It is useful for both EFI and BIOS and > also we don't need a new kernel parameter... > Dose the idea make sense? The more automatic stuff we do and we don't have to involve the user, the better. However, lemme look at Chao's current patchset first - we should not go nuts by putting SRAT parsing everywhere :) -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.