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Message-Id: <20170628150411.15846-1-marc.zyngier@arm.com>
Date: Wed, 28 Jun 2017 16:03:19 +0100
From: Marc Zyngier <marc.zyngier@....com>
To: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
kvmarm@...ts.cs.columbia.edu
Cc: Christoffer Dall <christoffer.dall@...aro.org>,
Thomas Gleixner <tglx@...utronix.de>,
Jason Cooper <jason@...edaemon.net>,
Eric Auger <eric.auger@...hat.com>,
Shanker Donthineni <shankerd@...eaurora.org>,
Mark Rutland <mark.rutland@....com>
Subject: [PATCH v2 00/52] irqchip: KVM: Add support for GICv4
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
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