From nobody Sat May 4 05:54:32 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495613449829572.8127515166893; Wed, 24 May 2017 01:10:49 -0700 (PDT) Received: from localhost ([::1]:53459 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dDRNX-0007ey-VQ for importer@patchew.org; Wed, 24 May 2017 04:10:47 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:32857) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dDRMD-00070V-9R for qemu-devel@nongnu.org; Wed, 24 May 2017 04:09:26 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dDRM9-0005f8-Af for qemu-devel@nongnu.org; Wed, 24 May 2017 04:09:25 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33824) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dDRM9-0005eV-5B for qemu-devel@nongnu.org; Wed, 24 May 2017 04:09:21 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 56EA97249D for ; Wed, 24 May 2017 08:09:19 +0000 (UTC) Received: from dhcp-1-107.brq.redhat.com (dhcp-1-114.brq.redhat.com [10.34.1.114]) by smtp.corp.redhat.com (Postfix) with ESMTP id BD1F07DE25; Wed, 24 May 2017 08:09:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 56EA97249D Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=lprosek@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 56EA97249D From: Ladi Prosek To: qemu-devel@nongnu.org Date: Wed, 24 May 2017 10:09:14 +0200 Message-Id: <20170524080914.23484-1-lprosek@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Wed, 24 May 2017 08:09:19 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH] pc: ACPI BIOS: use highest NUMA node for hotplug mem hole SRAT entry X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: imammedo@redhat.com, mst@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" For reasons unknown, Windows won't online all memory, both at command line and hot-plugged later, unless the hotplug mem hole SRAT entry specifies a node greater or equal to the ones where memory is added. Using the highest node on the machine makes recent versions of Windows happy. With this example command line: ... \ -m 1024,slots=3D4,maxmem=3D32G \ -numa node,nodeid=3D0 \ -numa node,nodeid=3D1 \ -numa node,nodeid=3D2 \ -numa node,nodeid=3D3 \ -object memory-backend-ram,size=3D1G,id=3Dmem-mem1 \ -device pc-dimm,id=3Ddimm-mem1,memdev=3Dmem-mem1,node=3D1 Windows reports a total of 1G of RAM without this commit and the expected 2G with this commit. Signed-off-by: Ladi Prosek Reviewed-by: Igor Mammedov --- hw/i386/acpi-build.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index afcadac..9653583 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -2404,14 +2404,17 @@ build_srat(GArray *table_data, BIOSLinker *linker, = MachineState *machine) } =20 /* - * Entry is required for Windows to enable memory hotplug in OS. + * Entry is required for Windows to enable memory hotplug in OS + * and for Linux to enable SWIOTLB even if booted with less than + * 4G of RAM. Windows works better if the entry sets proximity + * to the highest NUMA node in the machine. * Memory devices may override proximity set by this entry, * providing _PXM method if necessary. */ if (hotplugabble_address_space_size) { numamem =3D acpi_data_push(table_data, sizeof *numamem); build_srat_memory(numamem, pcms->hotplug_memory.base, - hotplugabble_address_space_size, 0, + hotplugabble_address_space_size, pcms->numa_node= s - 1, MEM_AFFINITY_HOTPLUGGABLE | MEM_AFFINITY_ENABLED= ); } =20 --=20 2.9.3