From nobody Mon Nov 10 19:10:29 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=linux.intel.com ARC-Seal: i=1; a=rsa-sha256; t=1558429078; cv=none; d=zoho.com; s=zohoarc; b=oPBPrlfXujM913YEg8hb3F/Z3NpMHCMnbka7MOLSuEGWEvjzxxUpUUTF+rtvSP/vI5zG0rFoe++1yC9M09++Ah1GbnPJsvKI3YPiHuAHYkaOnhM9Edv33LHLHjtSXUEArOXQpn1B5OENFZTnm618GKCFpr4z34vVEBj7gnNX7OI= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1558429078; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=uIhydZd0wgmYqrtu9FuR9xXvhevAlwDW64LGmK6SVYQ=; b=f5BpIqyemgrzxQChM1n8h6iREZdkKhUk1BL0RQHXLaHGYfaeIO95PLiBrY+ha0r8gXc5bmzkJy3wUDwBRbHV40iv6o+stXc2pPO5+t59WvWfQUe62wzwq2DB+dk36vr7eRbc0fNkEj7kyz9c20ZKBZUoAFIlMs0Cz++zqUbiGA8= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1558429078199378.09948902684755; Tue, 21 May 2019 01:57:58 -0700 (PDT) Received: from localhost ([127.0.0.1]:49395 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hT0al-0004xj-5U for importer@patchew.org; Tue, 21 May 2019 04:57:51 -0400 Received: from eggs.gnu.org ([209.51.188.92]:51959) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hT0WA-0001L5-4G for qemu-devel@nongnu.org; Tue, 21 May 2019 04:53:09 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hT0W8-0000aQ-Ce for qemu-devel@nongnu.org; Tue, 21 May 2019 04:53:06 -0400 Received: from mga04.intel.com ([192.55.52.120]:1679) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hT0W8-0000UM-3A for qemu-devel@nongnu.org; Tue, 21 May 2019 04:53:04 -0400 Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 May 2019 01:53:03 -0700 Received: from clx-ap-likexu.sh.intel.com ([10.239.48.98]) by fmsmga007.fm.intel.com with ESMTP; 21 May 2019 01:53:01 -0700 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 From: Like Xu To: qemu-devel@nongnu.org Date: Tue, 21 May 2019 00:50:54 +0800 Message-Id: <20190520165056.175475-4-like.xu@linux.intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190520165056.175475-1-like.xu@linux.intel.com> References: <20190520165056.175475-1-like.xu@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.120 Subject: [Qemu-devel] [PATCH v2 3/5] vl.c: Add -smp, dies=* command line support and update -smp doc 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: Andrew Jones , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , Eduardo Habkost , Peter Crosthwaite , Marcelo Tosatti , "Dr . David Alan Gilbert" , Markus Armbruster , Brice Goglin , Paolo Bonzini , Igor Mammedov , Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" For PC target, users could configure the number of dies per one package via command line with this patch, such as "-smp dies=3D2,cores=3D4". A new pc-specified pc_smp_parse() is introduced and to keep the interface consistent, refactoring legacy smp_parse() to __smp_parse() is necessary. The parsing rules of new cpu-topology model obey the same restrictions/logic as the legacy socket/core/thread model especially on missing values computi= ng. Signed-off-by: Like Xu --- qemu-options.hx | 17 +++++----- vl.c | 89 ++++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 97 insertions(+), 9 deletions(-) diff --git a/qemu-options.hx b/qemu-options.hx index 5daa5a8fb0..7fad5b50ff 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -138,25 +138,26 @@ no incompatible TCG features have been enabled (e.g. = icount/replay). ETEXI =20 DEF("smp", HAS_ARG, QEMU_OPTION_smp, - "-smp [cpus=3D]n[,maxcpus=3Dcpus][,cores=3Dcores][,threads=3Dthreads][= ,sockets=3Dsockets]\n" + "-smp [cpus=3D]n[,maxcpus=3Dcpus][,cores=3Dcores][,threads=3Dthreads][= ,dies=3Ddies][,sockets=3Dsockets]\n" " set the number of CPUs to 'n' [default=3D1]\n" " maxcpus=3D maximum number of total cpus, including\n" " offline CPUs for hotplug, etc\n" - " cores=3D number of CPU cores on one socket\n" + " cores=3D number of CPU cores on one socket (for PC, i= t's on one die)\n" " threads=3D number of threads on one CPU core\n" + " dies=3D number of CPU dies on one socket (for PC only= )\n" " sockets=3D number of discrete sockets in the system\n= ", QEMU_ARCH_ALL) STEXI -@item -smp [cpus=3D]@var{n}[,cores=3D@var{cores}][,threads=3D@var{threads}= ][,sockets=3D@var{sockets}][,maxcpus=3D@var{maxcpus}] +@item -smp [cpus=3D]@var{n}[,cores=3D@var{cores}][,threads=3D@var{threads}= ][,dies=3Ddies][,sockets=3D@var{sockets}][,maxcpus=3D@var{maxcpus}] @findex -smp Simulate an SMP system with @var{n} CPUs. On the PC target, up to 255 CPUs are supported. On Sparc32 target, Linux limits the number of usable C= PUs to 4. -For the PC target, the number of @var{cores} per socket, the number -of @var{threads} per cores and the total number of @var{sockets} can be -specified. Missing values will be computed. If any on the three values is -given, the total number of CPUs @var{n} can be omitted. @var{maxcpus} -specifies the maximum number of hotpluggable CPUs. +For the PC target, the number of @var{cores} per die, the number of @var{t= hreads} +per cores, the number of @var{dies} per packages and the total number of +@var{sockets} can be specified. Missing values will be computed. +If any on the three values is given, the total number of CPUs @var{n} can = be omitted. +@var{maxcpus} specifies the maximum number of hotpluggable CPUs. ETEXI =20 DEF("numa", HAS_ARG, QEMU_OPTION_numa, diff --git a/vl.c b/vl.c index 8d92e2d209..66b577f447 100644 --- a/vl.c +++ b/vl.c @@ -63,6 +63,7 @@ int main(int argc, char **argv) #include "sysemu/watchdog.h" #include "hw/firmware/smbios.h" #include "hw/acpi/acpi.h" +#include "hw/i386/pc.h" #include "hw/xen/xen.h" #include "hw/qdev.h" #include "hw/loader.h" @@ -1248,6 +1249,9 @@ static QemuOptsList qemu_smp_opts =3D { }, { .name =3D "sockets", .type =3D QEMU_OPT_NUMBER, + }, { + .name =3D "dies", + .type =3D QEMU_OPT_NUMBER, }, { .name =3D "cores", .type =3D QEMU_OPT_NUMBER, @@ -1262,7 +1266,7 @@ static QemuOptsList qemu_smp_opts =3D { }, }; =20 -static void smp_parse(QemuOpts *opts) +static void __smp_parse(QemuOpts *opts) { if (opts) { unsigned cpus =3D qemu_opt_get_number(opts, "cpus", 0); @@ -1334,6 +1338,89 @@ static void smp_parse(QemuOpts *opts) } } =20 +static void pc_smp_parse(QemuOpts *opts) +{ + PCMachineState *pcms =3D (PCMachineState *) + object_dynamic_cast(OBJECT(current_machine), TYPE_PC_MACHINE); + + unsigned cpus =3D qemu_opt_get_number(opts, "cpus", 0); + unsigned sockets =3D qemu_opt_get_number(opts, "sockets", 0); + unsigned dies =3D qemu_opt_get_number(opts, "dies", 1); + unsigned cores =3D qemu_opt_get_number(opts, "cores", 0); + unsigned threads =3D qemu_opt_get_number(opts, "threads", 0); + + /* compute missing values, prefer sockets over cores over threads */ + if (cpus =3D=3D 0 || sockets =3D=3D 0) { + cores =3D cores > 0 ? cores : 1; + threads =3D threads > 0 ? threads : 1; + if (cpus =3D=3D 0) { + sockets =3D sockets > 0 ? sockets : 1; + cpus =3D cores * threads * dies * sockets; + } else { + current_machine->smp.max_cpus =3D + qemu_opt_get_number(opts, "maxcpus", cpus); + sockets =3D current_machine->smp.max_cpus / (cores * threads *= dies); + } + } else if (cores =3D=3D 0) { + threads =3D threads > 0 ? threads : 1; + cores =3D cpus / (sockets * dies * threads); + cores =3D cores > 0 ? cores : 1; + } else if (threads =3D=3D 0) { + threads =3D cpus / (cores * dies * sockets); + threads =3D threads > 0 ? threads : 1; + } else if (sockets * dies * cores * threads < cpus) { + error_report("cpu topology: " + "sockets (%u) * dies (%u) * cores (%u) * threads (= %u) < " + "smp_cpus (%u)", + sockets, dies, cores, threads, cpus); + exit(1); + } + + current_machine->smp.max_cpus =3D + qemu_opt_get_number(opts, "maxcpus", cpus); + + if (current_machine->smp.max_cpus < cpus) { + error_report("maxcpus must be equal to or greater than smp"); + exit(1); + } + + if (sockets * dies * cores * threads > current_machine->smp.max_cpus) { + error_report("cpu topology: " + "sockets (%u) * dies (%u) * cores (%u) * threads (= %u) > " + "maxcpus (%u)", + sockets, dies, cores, threads, + current_machine->smp.max_cpus); + exit(1); + } + + if (sockets * dies * cores * threads !=3D current_machine->smp.max_cpu= s) { + warn_report("Invalid CPU topology deprecated: " + "sockets (%u) * dies (%u) * cores (%u) * threads (%u) " + "!=3D maxcpus (%u)", + sockets, dies, cores, threads, + current_machine->smp.max_cpus); + } + + current_machine->smp.cpus =3D cpus; + current_machine->smp.cores =3D cores; + current_machine->smp.threads =3D threads; + pcms->smp_dies =3D dies; + + if (current_machine->smp.cpus > 1) { + Error *blocker =3D NULL; + error_setg(&blocker, QERR_REPLAY_NOT_SUPPORTED, "smp"); + replay_add_blocker(blocker); + } +} + +static void smp_parse(QemuOpts *opts) +{ + if (object_dynamic_cast(OBJECT(current_machine), TYPE_PC_MACHINE)) + pc_smp_parse(opts); + else + __smp_parse(opts); +} + static void realtime_init(void) { if (enable_mlock) { --=20 2.21.0