Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751998AbdF1PEt (ORCPT ); Wed, 28 Jun 2017 11:04:49 -0400 Received: from foss.arm.com ([217.140.101.70]:42868 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751511AbdF1PEm (ORCPT ); Wed, 28 Jun 2017 11:04:42 -0400 From: Marc Zyngier To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu Cc: Christoffer Dall , Thomas Gleixner , Jason Cooper , Eric Auger , Shanker Donthineni , Mark Rutland Subject: [PATCH v2 00/52] irqchip: KVM: Add support for GICv4 Date: Wed, 28 Jun 2017 16:03:19 +0100 Message-Id: <20170628150411.15846-1-marc.zyngier@arm.com> X-Mailer: git-send-email 2.11.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6271 Lines: 127 Yes, it's been a long time coming, but I really wasn't looking forward to picking this up again. Anyway... This (monster of a) series implements full support for GICv4, bringing direct injection of MSIs to KVM on arm and arm64, assuming you have the right hardware (which is quite unlikely). To get an idea of the design, I'd recommend you start with patch #32, which tries to shed some light on the approach that I've taken. And before that, please digest some of the GICv3/GICv4 architecture documentation[1] (less than 800 pages!). Once you feel reasonably insane, you'll be in the right mood to read the code. The structure of the series is fairly simple. The initial 34 patches add some generic support for GICv4, while the rest of the code plugs KVM into it. This series relies on Eric Auger's irq-bypass series[2], which is a prerequisite for this work. The stack has been *very lightly* tested on an arm64 model, with a PCI virtio block device passed from the host to a guest (using kvmtool and Jean-Philippe Brucker's excellent VFIO support patches[3]). As it has never seen any HW, I expect things to be subtly broken, so go forward and test if you can, though I'm mostly interested in people reviewing the code at the moment. I've pushed out a branch based on 4.12-rc6 containing the dependencies (as well as a couple of debug patches): git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git kvm-arm64/gicv4-kvm * From v1: - The bulk of the 30-something initial patches have seen countless bugs being fixed, and some key data structures have been subtly tweaked (or killed altogether). They are still quite similar to what I had in v1 though. - The whole KVM code is brand new and as I said above, only lightly tested. - Collected a bunch a R-bs from Thomas and Eric (many thanks, guys). [1] https://static.docs.arm.com/ihi0069/c/IHI0069C_gic_architecture_specification.pdf [2] http://www.spinics.net/lists/kvm/msg151463.html [3] http://www.spinics.net/lists/kvm/msg151823.html Marc Zyngier (52): genirq: Let irq_set_vcpu_affinity() iterate over hierarchy irqchip/gic-v3: Add redistributor iterator irqchip/gic-v3: Add VLPI/DirectLPI discovery irqchip/gic-v3-its: Move LPI definitions around irqchip/gic-v3-its: Add probing for VLPI properties irqchip/gic-v3-its: Macro-ize its_send_single_command irqchip/gic-v3-its: Implement irq_set_irqchip_state for pending state irqchip/gic-v3-its: Split out property table allocation irqchip/gic-v3-its: Allow use of indirect VCPU tables irqchip/gic-v3-its: Split out pending table allocation irqchip/gic-v3-its: Rework LPI freeing irqchip/gic-v3-its: Generalize device table allocation irqchip/gic-v3-its: Generalize LPI configuration irqchip/gic-v4: Add management structure definitions irqchip/gic-v3-its: Add GICv4 ITS command definitions irqchip/gic-v3-its: Add VLPI configuration hook irqchip/gic-v3-its: Add VLPI map/unmap operations irqchip/gic-v3-its: Add VLPI configuration handling irqchip/gic-v3-its: Add VPE domain infrastructure irqchip/gic-v3-its: Add VPE irq domain allocation/teardown irqchip/gic-v3-its: Add VPE irq domain [de]activation irqchip/gic-v3-its: Add VPENDBASER/VPROPBASER accessors irqchip/gic-v3-its: Add VPE scheduling irqchip/gic-v3-its: Add VPE invalidation hook irqchip/gic-v3-its: Add VPE affinity changes irqchip/gic-v3-its: Add VPE interrupt masking irqchip/gic-v3-its: Support VPE doorbell invalidation even when !DirectLPI irqchip/gic-v3-its: Set implementation defined bit to enable VLPIs irqchip/gic-v4: Add per-VM VPE domain creation irqchip/gic-v4: Add VPE command interface irqchip/gic-v4: Add VLPI configuration interface irqchip/gic-v4: Add some basic documentation irqchip/gic-v4: Enable low-level GICv4 operations irqchip/gic-v3: Advertise GICv4 support to KVM KVM: arm/arm64: vgic: Move kvm_vgic_destroy call around KVM: arm/arm64: vITS: Add MSI translation helpers KVM: arm/arm64: GICv4: Add init and teardown of the vPE irq domain KVM: arm/arm64: GICv4: Wire init/teardown of per-VM support KVM: arm/arm64: GICv4: Wire mapping/unmapping of VLPIs in VFIO irq bypass KVM: arm/arm64: GICv4: Handle INT command applied to a VLPI KVM: arm/arm64: GICv4: Unmap VLPI when freeing an LPI KVM: arm/arm64: GICv4: Handle MOVI applied to a VLPI KVM: arm/arm64: GICv4: Handle CLEAR applied to a VLPI KVM: arm/arm64: GICv4: Handle MOVALL applied to a vPE KVM: arm/arm64: GICv4: Propagate property updates to VLPIs KVM: arm/arm64: GICv4: Handle INVALL applied to a vPE KVM: arm/arm64: GICv4: Propagate VLPI properties at map time KVM: arm/arm64: GICv4: Add doorbell interrupt handling KVM: arm/arm64: GICv4: Hook vPE scheduling into vgic flush/sync KVM: arm/arm64: GICv4: Enable virtual cpuif if VLPIs can be delivered KVM: arm/arm64: GICv4: Use pending_last as a scheduling hint KVM: arm/arm64: GICv4: Enable VLPI support arch/arm/include/asm/arch_gicv3.h | 33 + arch/arm/kvm/Makefile | 1 + arch/arm64/include/asm/arch_gicv3.h | 6 + arch/arm64/kvm/Makefile | 1 + drivers/irqchip/Makefile | 2 +- drivers/irqchip/irq-gic-v3-its.c | 1288 +++++++++++++++++++++++++++++--- drivers/irqchip/irq-gic-v3.c | 93 ++- drivers/irqchip/irq-gic-v4.c | 209 ++++++ include/kvm/arm_vgic.h | 19 + include/linux/irqchip/arm-gic-common.h | 2 + include/linux/irqchip/arm-gic-v3.h | 84 +++ include/linux/irqchip/arm-gic-v4.h | 102 +++ kernel/irq/manage.c | 14 +- virt/kvm/arm/arm.c | 31 +- virt/kvm/arm/hyp/vgic-v3-sr.c | 9 +- virt/kvm/arm/vgic/vgic-init.c | 11 +- virt/kvm/arm/vgic/vgic-its.c | 165 ++-- virt/kvm/arm/vgic/vgic-v3.c | 6 + virt/kvm/arm/vgic/vgic-v4.c | 210 ++++++ virt/kvm/arm/vgic/vgic.c | 7 + virt/kvm/arm/vgic/vgic.h | 10 + 21 files changed, 2103 insertions(+), 200 deletions(-) create mode 100644 drivers/irqchip/irq-gic-v4.c create mode 100644 include/linux/irqchip/arm-gic-v4.h create mode 100644 virt/kvm/arm/vgic/vgic-v4.c -- 2.11.0