From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Hansen Subject: Re: [PATCH v5 31/32] x86: Add sysfs support for Secure Memory Encryption Date: Fri, 21 Apr 2017 14:55:13 -0700 Message-ID: <1498ec98-b19d-c47d-902b-a68870a3f860@intel.com> References: <20170418211612.10190.82788.stgit@tlendack-t1.amdoffice.net> <20170418212212.10190.73484.stgit@tlendack-t1.amdoffice.net> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20170418212212.10190.73484.stgit@tlendack-t1.amdoffice.net> Sender: owner-linux-mm@kvack.org To: Tom Lendacky , linux-arch@vger.kernel.org, linux-efi@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, x86@kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, iommu@lists.linux-foundation.org Cc: Rik van Riel , =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= , Toshimitsu Kani , Arnd Bergmann , Jonathan Corbet , Matt Fleming , "Michael S. Tsirkin" , Joerg Roedel , Konrad Rzeszutek Wilk , Paolo Bonzini , Larry Woodman , Brijesh Singh , Ingo Molnar , Borislav Petkov , Andy Lutomirski , "H. Peter Anvin" , Andrey Ryabinin , Alexander Potapenko , Dave Young , Thomas Gleixner , Dmitry Vyukov List-Id: linux-arch.vger.kernel.org On 04/18/2017 02:22 PM, Tom Lendacky wrote: > Add sysfs support for SME so that user-space utilities (kdump, etc.) can > determine if SME is active. > > A new directory will be created: > /sys/kernel/mm/sme/ > > And two entries within the new directory: > /sys/kernel/mm/sme/active > /sys/kernel/mm/sme/encryption_mask Why do they care, and what will they be doing with this information? -- 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 mga01.intel.com ([192.55.52.88]:63840 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1426104AbdDUVzP (ORCPT ); Fri, 21 Apr 2017 17:55:15 -0400 Subject: Re: [PATCH v5 31/32] x86: Add sysfs support for Secure Memory Encryption References: <20170418211612.10190.82788.stgit@tlendack-t1.amdoffice.net> <20170418212212.10190.73484.stgit@tlendack-t1.amdoffice.net> From: Dave Hansen Message-ID: <1498ec98-b19d-c47d-902b-a68870a3f860@intel.com> Date: Fri, 21 Apr 2017 14:55:13 -0700 MIME-Version: 1.0 In-Reply-To: <20170418212212.10190.73484.stgit@tlendack-t1.amdoffice.net> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-arch-owner@vger.kernel.org List-ID: To: Tom Lendacky , linux-arch@vger.kernel.org, linux-efi@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, x86@kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, iommu@lists.linux-foundation.org Cc: Rik van Riel , =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= , Toshimitsu Kani , Arnd Bergmann , Jonathan Corbet , Matt Fleming , "Michael S. Tsirkin" , Joerg Roedel , Konrad Rzeszutek Wilk , Paolo Bonzini , Larry Woodman , Brijesh Singh , Ingo Molnar , Borislav Petkov , Andy Lutomirski , "H. Peter Anvin" , Andrey Ryabinin , Alexander Potapenko , Dave Young , Thomas Gleixner , Dmitry Vyukov Message-ID: <20170421215513.I_rXsZ2Gp5o1AcG2QAlt_lwmCMgZv_2ALYT0pyVWDBA@z> On 04/18/2017 02:22 PM, Tom Lendacky wrote: > Add sysfs support for SME so that user-space utilities (kdump, etc.) can > determine if SME is active. > > A new directory will be created: > /sys/kernel/mm/sme/ > > And two entries within the new directory: > /sys/kernel/mm/sme/active > /sys/kernel/mm/sme/encryption_mask Why do they care, and what will they be doing with this information?