From mboxrd@z Thu Jan 1 00:00:00 1970 From: Borislav Petkov Subject: Re: [PATCH v6 04/34] x86/CPU/AMD: Add the Secure Memory Encryption CPU feature Date: Fri, 9 Jun 2017 12:55:40 +0200 Message-ID: <20170609105540.jpkle2qja4kyin6i@pd.tnic> References: <20170607191309.28645.15241.stgit@tlendack-t1.amdoffice.net> <20170607191353.28645.85058.stgit@tlendack-t1.amdoffice.net> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Return-path: Content-Disposition: inline In-Reply-To: <20170607191353.28645.85058.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, kexec@lists.infradead.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 , Konrad Rzeszutek Wilk , Paolo Bonzini , Larry Woodman , Brijesh Singh , Ingo Molnar , Andy Lutomirski , "H. Peter Anvin" , Andrey Ryabinin , Alexander List-Id: linux-efi@vger.kernel.org On Wed, Jun 07, 2017 at 02:13:53PM -0500, Tom Lendacky wrote: > Update the CPU features to include identifying and reporting on the > Secure Memory Encryption (SME) feature. SME is identified by CPUID > 0x8000001f, but requires BIOS support to enable it (set bit 23 of > MSR_K8_SYSCFG). Only show the SME feature as available if reported by > CPUID and enabled by BIOS. > > Signed-off-by: Tom Lendacky > --- > arch/x86/include/asm/cpufeatures.h | 1 + > arch/x86/include/asm/msr-index.h | 2 ++ > arch/x86/kernel/cpu/amd.c | 13 +++++++++++++ > arch/x86/kernel/cpu/scattered.c | 1 + > 4 files changed, 17 insertions(+) Reviewed-by: Borislav Petkov -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply. -- 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