Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932160AbdDRGdV (ORCPT ); Tue, 18 Apr 2017 02:33:21 -0400 Received: from mx2.suse.de ([195.135.220.15]:39927 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753852AbdDRGb1 (ORCPT ); Tue, 18 Apr 2017 02:31:27 -0400 From: Juergen Gross To: linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org Cc: boris.ostrovsky@oracle.com, Juergen Gross Subject: [PATCH v3 05/11] x86/xen: use capabilities instead of fake cpuid values for acc Date: Tue, 18 Apr 2017 08:31:13 +0200 Message-Id: <20170418063119.11654-6-jgross@suse.com> X-Mailer: git-send-email 2.12.0 In-Reply-To: <20170418063119.11654-1-jgross@suse.com> References: <20170418063119.11654-1-jgross@suse.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1294 Lines: 38 When running as pv domain xen_cpuid() is being used instead of native_cpuid(). In xen_cpuid() the acc feature (thermal monitoring) is indicated as not being present by special casing the related cpuid leaf. Instead of delivering fake cpuid values clear the cpu capability bit for acc instead. Signed-off-by: Juergen Gross Reviewed-by: Boris Ostrovsky --- arch/x86/xen/enlighten_pv.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index 37e174d9009b..53fe97bd720f 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -294,9 +294,6 @@ static void __init xen_init_cpuid_mask(void) unsigned int ax, bx, cx, dx; unsigned int xsave_mask; - cpuid_leaf1_edx_mask = - ~(1 << X86_FEATURE_ACC); /* thermal monitoring */ - if (!xen_initial_domain()) cpuid_leaf1_edx_mask &= ~((1 << X86_FEATURE_ACPI)); /* disable ACPI */ @@ -325,6 +322,7 @@ static void __init xen_init_capabilities(void) setup_clear_cpu_cap(X86_FEATURE_DCA); setup_clear_cpu_cap(X86_FEATURE_APERFMPERF); setup_clear_cpu_cap(X86_FEATURE_MTRR); + setup_clear_cpu_cap(X86_FEATURE_ACC); } static void xen_set_debugreg(int reg, unsigned long val) -- 2.12.0