From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752356AbdKJJxB (ORCPT ); Fri, 10 Nov 2017 04:53:01 -0500 Received: from mail-wm0-f49.google.com ([74.125.82.49]:38026 "EHLO mail-wm0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751220AbdKJJw7 (ORCPT ); Fri, 10 Nov 2017 04:52:59 -0500 X-Google-Smtp-Source: AGs4zMbOVpdpdYEHUypvxydELOC8iaFh8Izwyilpzsfhn0dYfniG3uMQAhb7UFk2PiHOWflnqox1VQ== Date: Fri, 10 Nov 2017 12:52:56 +0300 From: "Kirill A. Shutemov" To: Ingo Molnar Cc: "Kirill A. Shutemov" , Ingo Molnar , Linus Torvalds , x86@kernel.org, Thomas Gleixner , "H. Peter Anvin" , Andy Lutomirski , Cyrill Gorcunov , Borislav Petkov , Andi Kleen , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 3/4] x86/boot/compressed/64: Introduce place_trampoline() Message-ID: <20171110095256.vmndegdixd5keyqo@node.shutemov.name> References: <20171101115503.18358-1-kirill.shutemov@linux.intel.com> <20171101115503.18358-4-kirill.shutemov@linux.intel.com> <20171110091453.6pk5lotvom2cf4mv@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20171110091453.6pk5lotvom2cf4mv@gmail.com> User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 10, 2017 at 10:14:53AM +0100, Ingo Molnar wrote: > I'm wondering, how did you test it if no current bootloader puts the kernel to > above addresses of 4G? I didn't test it directly. I've checked with debugger that there's no memory accesses above 1M between disabling paging in the trampoline and returning back from trampoline to the main kernel image code. -- Kirill A. Shutemov