GICv3 is the base for a new generation of interrupt controllers designed to overcome some of the most glaring limitations of GICv2. Some of the features are: - Support for more than 8 CPUs (a lot more...) - System registers for CPU interface access (instead of the memory mapped GICC, GICV, GICH) - Message based interrupts This patch series currently support: - Affinity Routing - System Registers - Non-Secure Group-1 interrupts only - KVM support (GICv3 host, GICv2 guest) What is *not yet* supported in this series: - LPI/ITS/MSI (patches are available in the below branch, though still in development) - KVM GICv3 guest support (requires GICv3 distributor emulation, WIP) - Any form of power management - 32bit systems To be built, this code requires a fairly recent compiler/binutils combo. Linaro 13.06 seems to do the trick. This has been tested on the ARM FVP and Foundation models, with non-regressions run on a VExpress TC-2. So far, the level of reviewing has been embarassingly low (my sincere thanks to Christoffer and Will for undertaking it). While the documentation is unfortunately not public yet, it is available to those actively implementing GICv3 in their hardware, and I'm really eager to see reviews and test reports. Without that kind of engagement, it is unlikely that this code will get merged any time soon. Individuals without access to documentation and/or hardware can still review the code (it shares a lot of concepts with GICv2) and test in on the freely available Foundation model (see http://releases.linaro.org/latest/openembedded/aarch64/ for details on how to use the Foundation model). The code is also available at the following location (warning, unstable branch!): git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git kvm-arm64/gicv3 * From the initial revision [1] - Some code sharing with GICv2 - Barrier cleanup/clarification - Revised boot protocol update - Consistent use of the MPIDR access macros - Fixed a number of embarassing bugs - Fixed DT examples - Fixed bisectability of the series [1]: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-February/229959.html Marc Zyngier (19): ARM: GIC: move some bits of GICv2 to a library-type file arm64: initial support for GICv3 arm64: GICv3 device tree binding documentation arm64: boot protocol documentation update for GICv3 KVM: arm/arm64: vgic: move GICv2 registers to their own structure KVM: ARM: vgic: introduce vgic_ops and LR manipulation primitives KVM: ARM: vgic: abstract access to the ELRSR bitmap KVM: ARM: vgic: abstract EISR bitmap access KVM: ARM: vgic: abstract MISR decoding KVM: ARM: vgic: move underflow handling to vgic_ops KVM: ARM: vgic: abstract VMCR access KVM: ARM: vgic: introduce vgic_enable KVM: ARM: introduce vgic_params structure KVM: ARM: vgic: split GICv2 backend from the main vgic code arm64: KVM: remove __kvm_hyp_code_{start,end} from hyp.S arm64: KVM: split GICv2 world switch from hyp code arm64: KVM: move hcr_el2 setting into vgic-v2-switch.S KVM: ARM: vgic: add the GICv3 backend arm64: KVM: vgic: add GICv3 world switch Documentation/arm64/booting.txt | 6 + Documentation/devicetree/bindings/arm/gic-v3.txt | 79 +++ arch/arm/include/asm/kvm_host.h | 5 + arch/arm/kernel/asm-offsets.c | 14 +- arch/arm/kvm/Makefile | 1 + arch/arm/kvm/interrupts_head.S | 26 +- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/kvm_asm.h | 14 +- arch/arm64/include/asm/kvm_host.h | 28 + arch/arm64/include/asm/virt.h | 4 + arch/arm64/kernel/asm-offsets.c | 25 +- arch/arm64/kernel/head.S | 18 + arch/arm64/kernel/hyp-stub.S | 1 + arch/arm64/kvm/Makefile | 4 + arch/arm64/kvm/hyp.S | 133 +---- arch/arm64/kvm/vgic-v2-switch.S | 149 ++++++ arch/arm64/kvm/vgic-v3-switch.S | 279 ++++++++++ drivers/irqchip/Kconfig | 5 + drivers/irqchip/Makefile | 3 +- drivers/irqchip/irq-gic-common.c | 132 +++++ drivers/irqchip/irq-gic-common.h | 33 ++ drivers/irqchip/irq-gic-v3.c | 650 +++++++++++++++++++++++ drivers/irqchip/irq-gic.c | 80 +-- include/kvm/arm_vgic.h | 103 +++- include/linux/irqchip/arm-gic-v3.h | 188 +++++++ virt/kvm/arm/vgic-v2.c | 228 ++++++++ virt/kvm/arm/vgic-v3.c | 220 ++++++++ virt/kvm/arm/vgic.c | 330 ++++++------ 28 files changed, 2365 insertions(+), 394 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/gic-v3.txt create mode 100644 arch/arm64/kvm/vgic-v2-switch.S create mode 100644 arch/arm64/kvm/vgic-v3-switch.S create mode 100644 drivers/irqchip/irq-gic-common.c create mode 100644 drivers/irqchip/irq-gic-common.h create mode 100644 drivers/irqchip/irq-gic-v3.c create mode 100644 include/linux/irqchip/arm-gic-v3.h create mode 100644 virt/kvm/arm/vgic-v2.c create mode 100644 virt/kvm/arm/vgic-v3.c -- 1.8.3.4 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
