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[2001:4830:134:3::11]) by mx.google.com with ESMTPS id s66-v6si62420qkc.334.2018.05.13.07.35.41 for (version=TLS1 cipher=AES128-SHA bits=128/128); Sun, 13 May 2018 07:35:41 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) client-ip=2001:4830:134:3::11; Authentication-Results: mx.google.com; spf=pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) smtp.mailfrom=qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from localhost ([::1]:43975 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fHs68-000809-WC for alex.bennee@linaro.org; Sun, 13 May 2018 10:35:41 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53810) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fHs5x-0007yX-IW for qemu-arm@nongnu.org; Sun, 13 May 2018 10:35:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fHs5u-0006NV-E3 for qemu-arm@nongnu.org; Sun, 13 May 2018 10:35:29 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:56736 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fHs5u-0006Mw-8e; Sun, 13 May 2018 10:35:26 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 0E460406F131; Sun, 13 May 2018 14:35:24 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-116-92.ams2.redhat.com [10.36.116.92]) by smtp.corp.redhat.com (Postfix) with ESMTP id C156D84459; Sun, 13 May 2018 14:35:17 +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: Sun, 13 May 2018 16:35:07 +0200 Message-Id: <1526222114-5324-1-git-send-email-eric.auger@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.5]); Sun, 13 May 2018 14:35:24 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.5]); Sun, 13 May 2018 14:35:24 +0000 (UTC) for IP:'10.11.54.5' DOMAIN:'int-mx05.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'eric.auger@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-arm] [RFC v2 0/7] KVM/ARM: Relax the max 123 vcpus limitation along with KVM GICv3 X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: marc.zyngier@arm.com, drjones@redhat.com, christoffer.dall@arm.com, zhaoshenglong@huawei.com Errors-To: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org Sender: "Qemu-arm" X-TUID: NhKtRtF8VUw4 Currently the max number of VCPUs usable along with the KVM GICv3 device is limited to 123. The rationale is a single redistributor region was supported and this latter was set to [0x80A0000, 0x9000000] within the guest physical address space, surrounded with DIST and UART MMIO regions. [1] now allows to register several redistributor regions. So this series overcomes the max 123 vcpu limitation by registering a new redistributor region located just after the VIRT_MEM RAM region. The total redistributor region capacity is set to 512 vcpus. The max supported VCPUs in non accelerated mode is not modified. Best Regards Eric Host Kernel dependencies: [1] [PATCH v6 00/12] KVM: arm/arm64: Allow multiple GICv3 redistributor regions https://github.com/eauger/linux/tree/v4.17-rc2-rdist-regions-v6 This QEMU series can be found at: https://github.com/eauger/qemu/tree/v2.12.0-rdist_regions-rfc-v2 History: v1 -> v2: - Do not use KVM_MAX_VCPUS anymore - In case the multiple redistributor region capability is not supported by the host kernel, the GICv3 device realize() fails with a hint for the end-user. - use properties to set the redistributor region count - sysbus_mmio_map is kept in virt and machine init done notifier mechanism is used with an address fixup addition. - I have not yet extended the second redist region as Peter suggested. We can easily add another 3d region later on if requested. But if mandated, I will fix that in next release. Eric Auger (7): linux-headers: Partial update for KVM/ARM multiple redistributor region registration target/arm: Allow KVM device address overwriting hw/intc/arm_gicv3: Introduce redist-region-count array property hw/intc/arm_gicv3_kvm: Get prepared to handle multiple redist regions hw/arm/virt: GICv3 DT node with one or two redistributor regions hw/arm/virt-acpi-build: Advertise one or two GICR structures hw/arm/virt: Register two redistributor regions when necessary hw/arm/virt-acpi-build.c | 9 +++++++ hw/arm/virt.c | 48 ++++++++++++++++++++++++++++++++++---- hw/intc/arm_gic_kvm.c | 4 ++-- hw/intc/arm_gicv3.c | 11 ++++++++- hw/intc/arm_gicv3_common.c | 35 +++++++++++++++++++++++---- hw/intc/arm_gicv3_its_kvm.c | 2 +- hw/intc/arm_gicv3_kvm.c | 38 ++++++++++++++++++++++++++---- include/hw/arm/virt.h | 12 ++++++++++ include/hw/intc/arm_gicv3_common.h | 6 +++-- linux-headers/asm-arm/kvm.h | 1 + linux-headers/asm-arm64/kvm.h | 1 + target/arm/kvm.c | 10 +++++++- target/arm/kvm_arm.h | 3 ++- 13 files changed, 158 insertions(+), 22 deletions(-) -- 2.5.5