From mboxrd@z Thu Jan 1 00:00:00 1970 From: Juergen Gross Subject: Re: [PATCH v7 32/36] xen/x86: Remove SME feature in PV guests Date: Sat, 17 Jun 2017 12:40:17 +0200 Message-ID: <8dac5656-3d54-8b14-46ca-50072b507be3@suse.com> References: <20170616184947.18967.84890.stgit@tlendack-t1.amdoffice.net> <20170616185554.18967.82909.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: <20170616185554.18967.82909.stgit@tlendack-t1.amdoffice.net> Content-Language: de-DE Sender: linux-doc-owner@vger.kernel.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, xen-devel@lists.xen.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org Cc: Brijesh Singh , Toshimitsu Kani , =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= , Matt Fleming , Alexander Potapenko , "H. Peter Anvin" , Larry Woodman , Jonathan Corbet , Joerg Roedel , "Michael S. Tsirkin" , Ingo Molnar , Andrey Ryabinin , Dave Young , Rik van Riel , Arnd Bergmann , Konrad Rzeszutek Wilk , Borislav Petkov , Andy Lutomirski , Boris Ostrovsky , Dmitry Vyukov List-Id: linux-arch.vger.kernel.org On 16/06/17 20:55, Tom Lendacky wrote: > Xen does not currently support SME for PV guests. Clear the SME cpu > capability in order to avoid any ambiguity. > > Signed-off-by: Tom Lendacky Reviewed-by: Juergen Gross Juergen > --- > arch/x86/xen/enlighten_pv.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c > index f33eef4..e6ecf42 100644 > --- a/arch/x86/xen/enlighten_pv.c > +++ b/arch/x86/xen/enlighten_pv.c > @@ -294,6 +294,7 @@ static void __init xen_init_capabilities(void) > setup_clear_cpu_cap(X86_FEATURE_MTRR); > setup_clear_cpu_cap(X86_FEATURE_ACC); > setup_clear_cpu_cap(X86_FEATURE_X2APIC); > + setup_clear_cpu_cap(X86_FEATURE_SME); > > if (!xen_initial_domain()) > setup_clear_cpu_cap(X86_FEATURE_ACPI); > > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx2.suse.de ([195.135.220.15]:33237 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752699AbdFQKkZ (ORCPT ); Sat, 17 Jun 2017 06:40:25 -0400 Subject: Re: [PATCH v7 32/36] xen/x86: Remove SME feature in PV guests References: <20170616184947.18967.84890.stgit@tlendack-t1.amdoffice.net> <20170616185554.18967.82909.stgit@tlendack-t1.amdoffice.net> From: Juergen Gross Message-ID: <8dac5656-3d54-8b14-46ca-50072b507be3@suse.com> Date: Sat, 17 Jun 2017 12:40:17 +0200 MIME-Version: 1.0 In-Reply-To: <20170616185554.18967.82909.stgit@tlendack-t1.amdoffice.net> Content-Type: text/plain; charset=utf-8 Content-Language: de-DE 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, xen-devel@lists.xen.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org Cc: Brijesh Singh , Toshimitsu Kani , =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= , Matt Fleming , Alexander Potapenko , "H. Peter Anvin" , Larry Woodman , Jonathan Corbet , Joerg Roedel , "Michael S. Tsirkin" , Ingo Molnar , Andrey Ryabinin , Dave Young , Rik van Riel , Arnd Bergmann , Konrad Rzeszutek Wilk , Borislav Petkov , Andy Lutomirski , Boris Ostrovsky , Dmitry Vyukov , Thomas Gleixner , Paolo Bonzini Message-ID: <20170617104017.QwWlTotptiDKHYPpd6oK3z4RGn1t40fc4Oyif0_Hzs4@z> On 16/06/17 20:55, Tom Lendacky wrote: > Xen does not currently support SME for PV guests. Clear the SME cpu > capability in order to avoid any ambiguity. > > Signed-off-by: Tom Lendacky Reviewed-by: Juergen Gross Juergen > --- > arch/x86/xen/enlighten_pv.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c > index f33eef4..e6ecf42 100644 > --- a/arch/x86/xen/enlighten_pv.c > +++ b/arch/x86/xen/enlighten_pv.c > @@ -294,6 +294,7 @@ static void __init xen_init_capabilities(void) > setup_clear_cpu_cap(X86_FEATURE_MTRR); > setup_clear_cpu_cap(X86_FEATURE_ACC); > setup_clear_cpu_cap(X86_FEATURE_X2APIC); > + setup_clear_cpu_cap(X86_FEATURE_SME); > > if (!xen_initial_domain()) > setup_clear_cpu_cap(X86_FEATURE_ACPI); > >