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 (WIP): - LPI/ITS/MSI (pending, depending on PCI) - KVM GICv3 guest support (pending patches from Andre) - Any form of power management (pending patches from Sudeep) - 32bit systems (pending patches from Jean-Philippe) Patches are laid out as such: - The first 3 patches contain the main GICv3 code - The fourth one updates the booting protocol for arm64 - The rest of the series implements KVM GICv2 emulation on top of GICv3 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 and another Cortex-A57 based platform. I now have received enough Reviewed-by from people familiar with the architecture, and a number of Tested-by from actual implementors, which (IMHO) makes ready for merging into 3.17 (Thomas, Jason: How do you want to play it? We have a rather big dependency between the first few patches and the rest of the stuff, which is KVM only). Individuals without access to documentation and/or hardware can still review the code (it shares a lot of concepts with GICv2) and test it 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: git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git gicv3/base * From v5 [5] - Documentation update (thanks to Mark) - A few comments, #defines and other cosmetic cleanups (suggested by Mark) - Endianness independance of GICv2 EISR and ELRSR accesses (thanks to Victor) - Split the last patch enabling the whole thing in order to ease split merging * From v4 [4] - Some cleanup and better error handling - World-switch optimisation (thanks to Will) - GICH->ICH namespace fixup (thanks to Jean-Philippe) - Moved __vgic_v3_get_ich_vtr_el2 to patch 19 - Rebased on top of 3.16-rc1 * From v3 [3] - Fixed a lot of issues found by Christoffer (too many to report here, see the email thread) - New .sync_lr_elrsr backend - New probing method - New irqchip_in_kernel implementation - Checked full bisectability of the series (hopefully got it right this time...) - rebased on top of 3.15-rc5 * From v2 [2] - removed sharing of the xlate method with GICv2 (TI crossbar is now getting in the way...) - Switched to a tree domain to accomodate for the LPI space - Fixed more bisectability * 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 [2]: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-March/241972.html [3]: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-April/248008.html [4]: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-May/256835.html [5]: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-June/264828.html Marc Zyngier (21): irqchip: ARM: GIC: Move some bits of GICv2 to a library-type file irqchip: 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 KVM: ARM: vgic: revisit implementation of irqchip_in_kernel 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.{IMO,FMO} manipulation into the vgic switch code KVM: ARM: vgic: add the GICv3 backend arm64: KVM: vgic: add GICv3 world switch arm64: KVM: vgic: enable GICv2 emulation on top on GICv3 hardware Documentation/arm64/booting.txt | 8 + 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_arm.h | 5 +- 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 | 127 +---- arch/arm64/kvm/vgic-v2-switch.S | 133 +++++ arch/arm64/kvm/vgic-v3-switch.S | 267 +++++++++ drivers/irqchip/Kconfig | 5 + drivers/irqchip/Makefile | 3 +- drivers/irqchip/irq-gic-common.c | 115 ++++ drivers/irqchip/irq-gic-common.h | 29 + drivers/irqchip/irq-gic-v3.c | 692 +++++++++++++++++++++++ drivers/irqchip/irq-gic.c | 59 +- include/kvm/arm_vgic.h | 115 +++- include/linux/irqchip/arm-gic-v3.h | 198 +++++++ virt/kvm/arm/vgic-v2.c | 243 ++++++++ virt/kvm/arm/vgic-v3.c | 231 ++++++++ virt/kvm/arm/vgic.c | 345 ++++++----- 29 files changed, 2442 insertions(+), 353 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 -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
