From patchwork Fri Mar 11 15:09:52 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Michael S. Tsirkin" X-Patchwork-Id: 8566371 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 94AF59F38C for ; Fri, 11 Mar 2016 15:26:55 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 08E9E20272 for ; Fri, 11 Mar 2016 15:26:55 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5DA492026D for ; Fri, 11 Mar 2016 15:26:54 +0000 (UTC) Received: from localhost ([::1]:55713 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aeOxp-0006t7-Cf for patchwork-qemu-devel@patchwork.kernel.org; Fri, 11 Mar 2016 10:26:53 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52117) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aeOhU-000393-7f for qemu-devel@nongnu.org; Fri, 11 Mar 2016 10:10:01 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aeOhQ-0000OA-FX for qemu-devel@nongnu.org; Fri, 11 Mar 2016 10:10:00 -0500 Received: from mx1.redhat.com ([209.132.183.28]:53712) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aeOhQ-0000O4-9z for qemu-devel@nongnu.org; Fri, 11 Mar 2016 10:09:56 -0500 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (Postfix) with ESMTPS id 0B29C627CB; Fri, 11 Mar 2016 15:09:56 +0000 (UTC) Received: from redhat.com (vpn1-4-242.ams2.redhat.com [10.36.4.242]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with SMTP id u2BF9qJj027941; Fri, 11 Mar 2016 10:09:53 -0500 Date: Fri, 11 Mar 2016 17:09:52 +0200 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Message-ID: <1457708548-14093-41-git-send-email-mst@redhat.com> References: <1457708548-14093-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1457708548-14093-1-git-send-email-mst@redhat.com> X-Mutt-Fcc: =sent X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Fri, 11 Mar 2016 15:09:56 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Cc: Peter Maydell , Richard Henderson , Paolo Bonzini , Eduardo Habkost , Igor Mammedov Subject: [Qemu-devel] [PULL 40/53] pc: acpi: clarify why possible LAPIC entries must be present in MADT X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Igor Mammedov Signed-off-by: Igor Mammedov Reviewed-by: Eduardo Habkost Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/i386/acpi-build.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 8736917..0a5acb3 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -360,6 +360,12 @@ build_madt(GArray *table_data, GArray *linker, PCMachineState *pcms) if (apic_ids->cpus[i].cpu != NULL) { apic->flags = cpu_to_le32(1); } else { + /* ACPI spec says that LAPIC entry for non present + * CPU may be omitted from MADT or it must be marked + * as disabled. However omitting non present CPU from + * MADT breaks hotplug on linux. So possible CPUs + * should be put in MADT but kept disabled. + */ apic->flags = cpu_to_le32(0); } }