Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754381Ab0LGHtU (ORCPT ); Tue, 7 Dec 2010 02:49:20 -0500 Received: from mga09.intel.com ([134.134.136.24]:54858 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753720Ab0LGHtS (ORCPT ); Tue, 7 Dec 2010 02:49:18 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.59,310,1288594800"; d="scan'208";a="684631475" From: Sheng Yang To: Jeremy Fitzhardinge Cc: Stefano Stabellini , konrad.wilk@oracle.com, xen-devel , linux-kernel@vger.kernel.org, Sheng Yang Subject: [PATCH 1/2] apic: Move hypervisor detection of x2apic to hypervisor.h Date: Tue, 7 Dec 2010 15:51:56 +0800 Message-Id: <1291708317-25103-1-git-send-email-sheng@linux.intel.com> X-Mailer: git-send-email 1.7.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1934 Lines: 65 Xen can use it later. Signed-off-by: Sheng Yang --- arch/x86/include/asm/hypervisor.h | 9 +++++++++ arch/x86/kernel/apic/apic.c | 5 +++-- 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/hypervisor.h b/arch/x86/include/asm/hypervisor.h index ff2546c..0c6f7af 100644 --- a/arch/x86/include/asm/hypervisor.h +++ b/arch/x86/include/asm/hypervisor.h @@ -20,6 +20,8 @@ #ifndef _ASM_X86_HYPERVISOR_H #define _ASM_X86_HYPERVISOR_H +#include + extern void init_hypervisor(struct cpuinfo_x86 *c); extern void init_hypervisor_platform(void); @@ -47,4 +49,11 @@ extern const struct hypervisor_x86 x86_hyper_vmware; extern const struct hypervisor_x86 x86_hyper_ms_hyperv; extern const struct hypervisor_x86 x86_hyper_xen_hvm; +static inline bool hypervisor_x2apic_available(void) +{ + if (kvm_para_available()) + return true; + return false; +} + #endif diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 3f838d5..8408f2d 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -50,8 +50,8 @@ #include #include #include -#include #include +#include unsigned int num_processors; @@ -1476,7 +1476,8 @@ void __init enable_IR_x2apic(void) /* IR is required if there is APIC ID > 255 even when running * under KVM */ - if (max_physical_apicid > 255 || !kvm_para_available()) + if (max_physical_apicid > 255 || + !hypervisor_x2apic_available()) goto nox2apic; /* * without IR all CPUs can be addressed by IOAPIC/MSI -- 1.7.0.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/