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[2001:4830:134:3::11]) by mx.google.com with ESMTPS id k2-v6si13253888qva.0.2018.05.30.04.46.12 for (version=TLS1 cipher=AES128-SHA bits=128/128); Wed, 30 May 2018 04:46:12 -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]:37748 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fNzYR-0004mV-Il for alex.bennee@linaro.org; Wed, 30 May 2018 07:46:11 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49194) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fNzYF-0004kX-OR for qemu-arm@nongnu.org; Wed, 30 May 2018 07:46:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fNzYC-000579-9R for qemu-arm@nongnu.org; Wed, 30 May 2018 07:45:59 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:41406 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 1fNzYC-00055s-4T; Wed, 30 May 2018 07:45:56 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 61539400E9BA; Wed, 30 May 2018 11:45:53 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-116-69.ams2.redhat.com [10.36.116.69]) by smtp.corp.redhat.com (Postfix) with ESMTP id 333A910EE95B; Wed, 30 May 2018 11:45:47 +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, 30 May 2018 13:45:33 +0200 Message-Id: <1527680741-2725-1-git-send-email-eric.auger@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Wed, 30 May 2018 11:45:53 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Wed, 30 May 2018 11:45:53 +0000 (UTC) for IP:'10.11.54.3' DOMAIN:'int-mx03.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 v3 0/8] 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: +k739h8OdXgx 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. This second redistributor region has a capacity of 512 redistributors. 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-v3 Previous version: https://github.com/eauger/qemu/tree/v2.12.0-rdist_regions-rfc-v2 History: v2 -> v3: - Added the last patch defining 3.0 machine type and setting max_cpus to 512 - redistributor region total count exactly matching the number of requested vcpus - added missing return in arm_gic_realize - checked redist region capacity versus #vcpus earlier in gicv3_init_irqs_and_mmio - use GICV3_REDIST_SIZE - Changed the 2d region size to 64MB 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 3th region later on if requested. But if mandated, I will fix that in next release. Eric Auger (8): 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: Add virt-3.0 machine type supporting up to 512 vcpus hw/arm/virt-acpi-build.c | 9 ++++ hw/arm/virt.c | 88 ++++++++++++++++++++++++++++++++------ hw/intc/arm_gic_kvm.c | 4 +- hw/intc/arm_gicv3.c | 12 +++++- hw/intc/arm_gicv3_common.c | 38 +++++++++++++--- hw/intc/arm_gicv3_its_kvm.c | 2 +- hw/intc/arm_gicv3_kvm.c | 40 +++++++++++++++-- include/hw/arm/virt.h | 14 ++++++ include/hw/intc/arm_gicv3_common.h | 8 +++- 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, 200 insertions(+), 30 deletions(-) -- 2.5.5