From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933063AbbI1KkL (ORCPT ); Mon, 28 Sep 2015 06:40:11 -0400 Received: from mail-wi0-f175.google.com ([209.85.212.175]:36431 "EHLO mail-wi0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932901AbbI1Kjb (ORCPT ); Mon, 28 Sep 2015 06:39:31 -0400 From: Paolo Bonzini To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: bsd@redhat.com Subject: [FYI PATCH 20/20] KVM: vmx: disable posted interrupts if no local APIC Date: Mon, 28 Sep 2015 12:39:05 +0200 Message-Id: <1443436745-38086-21-git-send-email-pbonzini@redhat.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1443436745-38086-1-git-send-email-pbonzini@redhat.com> References: <1443436745-38086-1-git-send-email-pbonzini@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Uniprocessor 32-bit randconfigs can disable the local APIC, and posted interrupts require reserving a vector on the LAPIC, so they are incompatible. Signed-off-by: Paolo Bonzini --- arch/x86/kvm/vmx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 75f3ee01f59b..353b91b744d7 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -986,7 +986,8 @@ static inline bool cpu_has_vmx_virtual_intr_delivery(void) static inline bool cpu_has_vmx_posted_intr(void) { - return vmcs_config.pin_based_exec_ctrl & PIN_BASED_POSTED_INTR; + return IS_ENABLED(CONFIG_X86_LOCAL_APIC) && + vmcs_config.pin_based_exec_ctrl & PIN_BASED_POSTED_INTR; } static inline bool cpu_has_vmx_apicv(void) -- 1.8.3.1