From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: [RFC PATCH v4 26/28] x86: Allow kexec to be used with SME Date: Fri, 17 Feb 2017 10:57:56 -0500 Message-ID: <20170217155756.GJ30272@char.us.ORACLE.com> References: <20170216154158.19244.66630.stgit@tlendack-t1.amdoffice.net> <20170216154755.19244.51276.stgit@tlendack-t1.amdoffice.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20170216154755.19244.51276.stgit@tlendack-t1.amdoffice.net> Sender: owner-linux-mm@kvack.org To: Tom Lendacky Cc: linux-arch@vger.kernel.org, linux-efi@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Rik van Riel , Radim =?utf-8?B?S3LEjW3DocWZ?= , Toshimitsu Kani , Arnd Bergmann , Jonathan Corbet , Matt Fleming , "Michael S. Tsirkin" , Joerg Roedel , Paolo Bonzini , Brijesh Singh , Ingo Molnar , Alexander Potapenko , Andy Lutomirski , "H. Peter Anvin" , Borislav Petkov List-Id: linux-arch.vger.kernel.org On Thu, Feb 16, 2017 at 09:47:55AM -0600, Tom Lendacky wrote: > Provide support so that kexec can be used to boot a kernel when SME is > enabled. Is the point of kexec and kdump to ehh, dump memory ? But if the rest of the memory is encrypted you won't get much, will you? Would it make sense to include some printk to the user if they are setting up kdump that they won't get anything out of it? Thanks. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from userp1040.oracle.com ([156.151.31.81]:40347 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934037AbdBQP7D (ORCPT ); Fri, 17 Feb 2017 10:59:03 -0500 Date: Fri, 17 Feb 2017 10:57:56 -0500 From: Konrad Rzeszutek Wilk Subject: Re: [RFC PATCH v4 26/28] x86: Allow kexec to be used with SME Message-ID: <20170217155756.GJ30272@char.us.ORACLE.com> References: <20170216154158.19244.66630.stgit@tlendack-t1.amdoffice.net> <20170216154755.19244.51276.stgit@tlendack-t1.amdoffice.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170216154755.19244.51276.stgit@tlendack-t1.amdoffice.net> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Tom Lendacky Cc: linux-arch@vger.kernel.org, linux-efi@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Rik van Riel , Radim =?utf-8?B?S3LEjW3DocWZ?= , Toshimitsu Kani , Arnd Bergmann , Jonathan Corbet , Matt Fleming , "Michael S. Tsirkin" , Joerg Roedel , Paolo Bonzini , Brijesh Singh , Ingo Molnar , Alexander Potapenko , Andy Lutomirski , "H. Peter Anvin" , Borislav Petkov , Andrey Ryabinin , Thomas Gleixner , Larry Woodman , Dmitry Vyukov Message-ID: <20170217155756.p2CUXnrmOqT684cdDyOScKHr577s9uoXYOtLyBxYhQ4@z> On Thu, Feb 16, 2017 at 09:47:55AM -0600, Tom Lendacky wrote: > Provide support so that kexec can be used to boot a kernel when SME is > enabled. Is the point of kexec and kdump to ehh, dump memory ? But if the rest of the memory is encrypted you won't get much, will you? Would it make sense to include some printk to the user if they are setting up kdump that they won't get anything out of it? Thanks.