From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Zyngier Subject: [PATCH v3 00/59] irqchip: KVM: Add support for GICv4 Date: Mon, 31 Jul 2017 18:25:38 +0100 Message-ID: <20170731172637.29355-1-marc.zyngier@arm.com> Cc: Christoffer Dall , Thomas Gleixner , Jason Cooper , Eric Auger , Shanker Donthineni , Mark Rutland , Shameerali Kolothum Thodi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org 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 patches #33 and #57, which try 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 35 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, as well as a KVM fix by Shanker. The last two patches add a quirk for the Huawei D05 box on which I tested this code, and which is added here for completeness and for people to test. 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 well as the Huawei D05 box I mentionend above using an Intel I350 Ethernet card and passing a VF into the guest. I expect things to be (not so) 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 4.13-rc3 containing the dependencies: git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git kvm-arm64/gicv4-kvm * From v2: - Lots of fixes all over the map (the doorbell code was amazingly wrong, both at the GICv4 level and in KVM) - KVM GICv4 enablement is now gated by a command-line option and defaults to off - Now properly deals with ordering of vITS creation - Some debugging features - More documentation so that I can forget what this is all about - Huawei D05 quirks * 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.pfd [2] http://www.spinics.net/lists/kvm/msg151463.html [3] http://www.spinics.net/lists/kvm/msg151823.html Marc Zyngier (59): 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: Allow doorbell interrupts to be injected/cleared 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: Select ARM_GIC_V3 and ARM_GIC_V3_ITS KVM: arm/arm64: vgic: Move kvm_vgic_destroy call around KVM: arm/arm64: vITS: Add MSI translation helpers KVM: arm/arm64: GICv4: Add property field and per-VM predicate KVM: arm/arm64: GICv4: Add init/teardown of the per-VM vPE irq domain 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: Use pending_last as a scheduling hint KVM: arm/arm64: GICv4: Add doorbell interrupt handling KVM: arm/arm64: GICv4: Use the doorbell interrupt as an unblocking source 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: Enable VLPI support KVM: arm/arm64: GICv4: Prevent heterogenous systems from using GICv4 KVM: arm/arm64: GICv4: Theory of operations irqchip/gic-v3-its: Pass its_node pointer to each command bulder irqchip/gic-v3-its: Workaround Huawei D05 redistributor addressing Documentation/admin-guide/kernel-parameters.txt | 4 + arch/arm/include/asm/arch_gicv3.h | 33 + arch/arm/kvm/Kconfig | 2 + 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 | 1421 +++++++++++++++++++++-- drivers/irqchip/irq-gic-v3.c | 95 +- drivers/irqchip/irq-gic-v4.c | 224 ++++ include/kvm/arm_vgic.h | 22 + include/linux/irqchip/arm-gic-common.h | 2 + include/linux/irqchip/arm-gic-v3.h | 86 ++ include/linux/irqchip/arm-gic-v4.h | 103 ++ kernel/irq/manage.c | 14 +- virt/kvm/arm/arm.c | 33 +- virt/kvm/arm/hyp/vgic-v3-sr.c | 9 +- virt/kvm/arm/vgic/vgic-init.c | 9 + virt/kvm/arm/vgic/vgic-its.c | 173 ++- virt/kvm/arm/vgic/vgic-mmio-v3.c | 5 + virt/kvm/arm/vgic/vgic-v3.c | 34 + virt/kvm/arm/vgic/vgic-v4.c | 335 ++++++ virt/kvm/arm/vgic/vgic.c | 7 + virt/kvm/arm/vgic/vgic.h | 11 + 24 files changed, 2419 insertions(+), 213 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