From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6BE22C49ED6 for ; Wed, 11 Sep 2019 15:54:45 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3C907206A5 for ; Wed, 11 Sep 2019 15:54:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3C907206A5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:52932 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i84x9-0004rh-Kx for qemu-devel@archiver.kernel.org; Wed, 11 Sep 2019 11:54:43 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59907) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i84uK-0002HL-8c for qemu-devel@nongnu.org; Wed, 11 Sep 2019 11:51:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i84uI-00037X-Ea for qemu-devel@nongnu.org; Wed, 11 Sep 2019 11:51:48 -0400 Received: from mx1.redhat.com ([209.132.183.28]:59034) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i84u9-00033l-6Q; Wed, 11 Sep 2019 11:51:41 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3C487301A638; Wed, 11 Sep 2019 15:51:35 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-168.ams2.redhat.com [10.36.116.168]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6A21160852; Wed, 11 Sep 2019 15:51:28 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org Date: Wed, 11 Sep 2019 17:51:22 +0200 Message-Id: <20190911155125.11932-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.40]); Wed, 11 Sep 2019 15:51:35 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [RFC v2 0/3] KVM/ARM: Fix >256 vcpus X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: yuzenghui@huawei.com, maz@kernel.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Since 4.18, KVM/ARM exposes a KVM_MAX_VCPUS equal to 512. However it was reported [1] that a VM with more than 256 vcpus cannot be launched. 5.4 is about to fix the situation with 2 patches: - one upgrade of the KVM_IRQ_LINE API [2] supporting a vcpu id encoded on 12 bits, - the reduction of KVM IO devices consumed by each GICv3 redistributor [3= ] This series uses the new KVM_IRQ_LINE API and also checks the associated capability (KVM_CAP_ARM_IRQ_LINE_LAYOUT_2) in machvirt. Without the series, as soon as the -smp arguments exceeds 256, QEMU exits with "kvm_set_irq: Invalid argument". Best Regards Eric References: [1] Can we boot a 512U kvm guest? https://patchwork.kernel.org/patch/11091501/ [2] [PATCH] KVM: arm/arm64: vgic: Allow more than 256 vcpus for KVM_IRQ_L= INE https://patchwork.kernel.org/patch/11099609/ [3] [PATCH] KVM: arm/arm64: vgic: Use a single IO device per redistributo= r https://patchwork.kernel.org/patch/11112141/ This series can be found at: https://github.com/eauger/qemu/tree/v4.1.0-256fix-rfc-v2 History: v1 -> v2: - New layout set for kvm_arm_gic_set_irq and arm_cpu_kvm_set_irq through kvm_arm_set_irq - Introduced kvm_arm_irq_line_layout_mismatch() Eric Auger (3): linux headers: update for KVM_CAP_ARM_IRQ_LINE_LAYOUT_2 intc/arm_gic: Support IRQ injection for more than 256 vpus virt: Check KVM_CAP_ARM_IRQ_LINE_LAYOUT_2 for smp_cpus > 256 hw/arm/virt.c | 4 +++ hw/intc/arm_gic_kvm.c | 7 ++-- include/standard-headers/asm-x86/bootparam.h | 2 ++ include/standard-headers/asm-x86/kvm_para.h | 1 + include/standard-headers/linux/ethtool.h | 2 ++ include/standard-headers/linux/pci_regs.h | 4 +++ include/standard-headers/linux/virtio_ids.h | 1 + include/standard-headers/linux/virtio_pmem.h | 6 ++-- linux-headers/asm-arm/kvm.h | 16 ++++++++- linux-headers/asm-arm/unistd-common.h | 2 ++ linux-headers/asm-arm64/kvm.h | 21 ++++++++++- linux-headers/asm-generic/mman-common.h | 15 ++++---- linux-headers/asm-generic/mman.h | 10 +++--- linux-headers/asm-generic/unistd.h | 8 ++++- linux-headers/asm-mips/unistd_n32.h | 1 + linux-headers/asm-mips/unistd_n64.h | 1 + linux-headers/asm-mips/unistd_o32.h | 1 + linux-headers/asm-powerpc/mman.h | 6 +--- linux-headers/asm-powerpc/unistd_32.h | 2 ++ linux-headers/asm-powerpc/unistd_64.h | 2 ++ linux-headers/asm-s390/unistd_32.h | 2 ++ linux-headers/asm-s390/unistd_64.h | 2 ++ linux-headers/asm-x86/kvm.h | 28 +++++++++++---- linux-headers/asm-x86/unistd_32.h | 2 ++ linux-headers/asm-x86/unistd_64.h | 2 ++ linux-headers/asm-x86/unistd_x32.h | 2 ++ linux-headers/linux/kvm.h | 12 +++++-- linux-headers/linux/psp-sev.h | 5 +-- target/arm/cpu.c | 10 +++--- target/arm/kvm.c | 37 ++++++++++++++++++++ target/arm/kvm_arm.h | 16 +++++++++ 31 files changed, 182 insertions(+), 48 deletions(-) --=20 2.20.1