This is version 7 of the GICv3 guest emulation series. As v6 this series is based on v3.19-rc3 plus Eric's explicit VGIC_CTRL_INIT patches. Most visible change is that the v6 patch 18/20 (introduce kvm_check_device_type()) is now gone, instead the validity check for the GICv2 emulation is now done internally via a new member of struct vgic_params (see new 18/20 for the implementation). There is new patch (20/20) that checks the userland provided memory regions's address for the VGIC to be properly aligned. Since that is build upon a refactoring in the series, I put it at the end. If this should be one of the first patches, let me know and I will rework that. The rest of the changes are smaller things spotted by Christoffer (many thanks for the repeated, surely tiresome reviews!). For a changelog summary see below, also each patch carries a changelog. Only patches 02, 05, 08, 15, 18 and 19 had actual changes, 20/20 is new. A git repo hosting all these patches lives in the kvm-gicv3/v7 branch of [1]. The kvm-gicv3/v6 branch has been updated to hold the delta patches. ----- GICv3 is the ARM generic interrupt controller designed to overcome some limits of the prevalent GICv2. Most notably it lifts the 8-CPU limit. Though with Linux-3.17 Marc introduced support for hosts to use a GICv3, the CPU limitation still applies to KVM guests, since the current code emulates a GICv2 only. Also, GICv2 backward compatibility being optional in GICv3, a number of systems won't be able to run GICv2 guests. This patch series provides code to emulate a GICv3 distributor and redistributor for any KVM guest. It requires a GICv3 in the host to work. With those patches one can run guests efficiently on any GICv3 host. It has the following features: - Affinity routing (support for up to 255 VCPUs, more possible) - System registers (as opposed to MMIO access) - No ITS - No priority support (as the GICv2 emulation) - No save / restore support so far (will be added soon) - Only Group1 interrupts support The first patches actually refactor the current VGIC code to make room for a different VGIC model to be dropped in with Patch 15. The remaining patches connect the new model to the kernel backend and the userland facing code. The series goes on top of v3.19-rc3 plus Eric's init rework patches. The necessary patches for kvmtool to enable the guest's GICv3 have been posted here before [2], an updated version will follow soon. There was some testing on the fast model with some I/O and interrupt affinity shuffling in a Linux guest with a varying number of VCPUs as well as some testing on a Juno board (GICv2 only, to spot regressions). Please review and test. I would be grateful for people to test for GICv2 regressions also (so on a GICv2 host with current kvmtool/qemu), as there is quite some refactoring on that front. Much of the code was inspired by MarcZ, also kudos to him for doing the rather painful rebase on top of v3.17-rc1. Cheers, Andre. [1] https://github.com/apritzel/linux.git [2] https://lists.cs.columbia.edu/pipermail/kvmarm/2014-June/010086.html Andre Przywara (20): arm/arm64: KVM: rework MPIDR assignment and add accessors arm/arm64: KVM: pass down user space provided GIC type into vGIC code arm/arm64: KVM: refactor vgic_handle_mmio() function arm/arm64: KVM: wrap 64 bit MMIO accesses with two 32 bit ones arm/arm64: KVM: introduce per-VM ops arm/arm64: KVM: move kvm_register_device_ops() into vGIC probing arm/arm64: KVM: dont rely on a valid GICH base address arm/arm64: KVM: make the maximum number of vCPUs a per-VM value arm/arm64: KVM: make the value of ICC_SRE_EL1 a per-VM variable arm/arm64: KVM: refactor MMIO accessors arm/arm64: KVM: refactor/wrap vgic_set/get_attr() arm/arm64: KVM: add vgic.h header file arm/arm64: KVM: split GICv2 specific emulation code from vgic.c arm/arm64: KVM: add opaque private pointer to MMIO data arm/arm64: KVM: add virtual GICv3 distributor emulation arm64: GICv3: introduce symbolic names for GICv3 ICC_SGI1R_EL1 fields arm64: KVM: add SGI generation register emulation arm/arm64: KVM: enable kernel side of GICv3 emulation arm/arm64: KVM: allow userland to request a virtual GICv3 arm/arm64: KVM: force alignment of VGIC dist/CPU/redist addresses Documentation/virtual/kvm/api.txt | 13 +- Documentation/virtual/kvm/devices/arm-vgic.txt | 26 +- arch/arm/include/asm/kvm_emulate.h | 5 +- arch/arm/include/asm/kvm_host.h | 3 + arch/arm/include/asm/kvm_mmio.h | 1 + arch/arm/kvm/Makefile | 1 + arch/arm/kvm/arm.c | 23 +- arch/arm/kvm/psci.c | 17 +- arch/arm64/include/asm/kvm_emulate.h | 5 +- arch/arm64/include/asm/kvm_host.h | 5 + arch/arm64/include/asm/kvm_mmio.h | 1 + arch/arm64/include/uapi/asm/kvm.h | 7 + arch/arm64/kernel/asm-offsets.c | 1 + arch/arm64/kvm/Makefile | 2 + arch/arm64/kvm/sys_regs.c | 40 +- arch/arm64/kvm/vgic-v3-switch.S | 14 +- drivers/irqchip/irq-gic-v3.c | 14 +- include/kvm/arm_vgic.h | 43 +- include/linux/irqchip/arm-gic-v3.h | 44 + include/linux/kvm_host.h | 2 + include/uapi/linux/kvm.h | 2 + virt/kvm/arm/vgic-v2-emul.c | 847 ++++++++++++++++++ virt/kvm/arm/vgic-v2.c | 4 + virt/kvm/arm/vgic-v3-emul.c | 1036 ++++++++++++++++++++++ virt/kvm/arm/vgic-v3.c | 82 +- virt/kvm/arm/vgic.c | 1121 ++++++------------------ virt/kvm/arm/vgic.h | 123 +++ 27 files changed, 2566 insertions(+), 916 deletions(-) create mode 100644 virt/kvm/arm/vgic-v2-emul.c create mode 100644 virt/kvm/arm/vgic-v3-emul.c create mode 100644 virt/kvm/arm/vgic.h -- 1.7.9.5 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
