This series converts the VGIC MMIO handling routines to the generic kvm_io_bus framework. The framework is needed for the ioeventfd functionality, some people on the list wanted to see the VGIC converted over to use it, too. Beside from now moving to a generic framework instead of relying on an ARM specific one we also clean up quite some code and get rid of some unnecessary copying. On that way the MMIO abort handling for ARM has changed quite a bit, so please have a closer look and test it on your setup if possible.
Compared to v2 I merged in a build fix for patch 1. The old 06/12 is now gone, instead I changed the code to only call kvm_io_bus_unregister_dev when rolling back a failed init and letting the VM teardown take care of the io_bus destruction entirely. This affects the old patches 08/12-10/12. Also there is now a new patch (09/11), which optimises the GICv3 redistributor handling to only have one region for the register frame. This save half of the kvm_io_bus devices in the next patch. Also I merged in a fix when using QEMU with this series [2] and merged the last two patches (enabling new framework and removing old code), because it didn't build properly and fixing that up didn't seem worthwile. The series is loosely based on Nikolay's work[1], thanks especially for the tedious first patch. I totally reworked Nikolay's 3/5 to avoid adding another MMIO handling layer on top of the already quite convoluted VGIC MMIO handling. Also Nikolay's 2/5 get extended and changed significantly, that's why I dropped his Signed-off-by. Unfortunately kvm_io_bus lacks an opaque pointer to pass in some data, so I worked around this by using container_of. Now for every struct kvm_mmio_range array a KVM I/O device is registered (one for VGICv2, nr_vcpus + 1 for VGICv3), using the struct kvm_io_device variable as an anchor into the new struct vgic_io_device. This one holds the base address, the vgic_io_range pointer and (in case of the GICv3 redistributor) the associated vCPU, so that we can access all instance-specific data easily. Patch 2 moves the iodev.h header file around, that solves a problem when embedding a struct in arm_vgic.h later. That looks like a nice cleanup anyway, so I added two patches to remove the compiler switch to add virt/kvm as a include directory. This has been tested for arm/arm64 and x86. As soon as I get around to compile-test the other architectures, I can send out the respective patches for those, too. Patches 5 and 6 tweak the existing code a bit to make it fit for the conversion. Patch 7 contains the framework for the new handling, while patch 8 and 10 enable the GICv2 and GICv3 emulation, respectively. Patch 9 optimises the GICv3 register handling to ease the GICv3 adaption to the new framework. Patch 11 finally switches over to the new kvm_io_bus handling, reworking the early ARM KVM MMIO handling quite a bit. This allows to removes quite some now unneeded code. The series goes on top of the kvmarm.git/next branch and was briefly tested on an arm64 model with a GICv2 and a GICv3 guest and on Midway (GICv2 guest). Cheers, Andre. [1] https://lists.cs.columbia.edu/pipermail/kvmarm/2015-January/013379.html [2] https://lists.cs.columbia.edu/pipermail/kvmarm/2015-March/014098.html Changelog v2 .. v3: - fix build in first patch - fix NULL pointer dereference when using QEMU - merge GICv3 RD_base and SGI_base MMIO register frames - explicitly unregister kvm_io_bus devices on failing init - remove vgic_unregister_kvm_io_dev (let kvm_io_bus framework handle this) - remove marking of destroyed kvm_io_bus'es with NULL - merge framework switch and code removal patch Andre Przywara (10): KVM: move iodev.h from virt/kvm/ to include/kvm KVM: arm/arm64: remove now unneeded include directory from Makefile KVM: x86: remove now unneeded include directory from Makefile KVM: arm/arm64: rename struct kvm_mmio_range to vgic_io_range KVM: arm/arm64: simplify vgic_find_range() and callers KVM: arm/arm64: implement kvm_io_bus MMIO handling for the VGIC KVM: arm/arm64: prepare GICv2 emulation to be handled by kvm_io_bus KVM: arm/arm64: merge GICv3 RD_base and SGI_base register frames KVM: arm/arm64: prepare GICv3 emulation to use kvm_io_bus MMIO handling KVM: arm/arm64: rework MMIO abort handling to use KVM MMIO bus Nikolay Nikolaev (1): KVM: Redesign kvm_io_bus_ API to pass VCPU structure to the callbacks. arch/arm/include/asm/kvm_mmio.h | 22 ---- arch/arm/kvm/Makefile | 2 +- arch/arm/kvm/mmio.c | 60 ++++++--- arch/arm64/include/asm/kvm_mmio.h | 22 ---- arch/arm64/kvm/Makefile | 2 +- arch/powerpc/kvm/mpic.c | 12 +- arch/powerpc/kvm/powerpc.c | 4 +- arch/s390/kvm/diag.c | 2 +- arch/x86/kvm/Makefile | 2 +- arch/x86/kvm/i8254.c | 14 ++- arch/x86/kvm/i8254.h | 2 +- arch/x86/kvm/i8259.c | 12 +- arch/x86/kvm/ioapic.c | 8 +- arch/x86/kvm/ioapic.h | 2 +- arch/x86/kvm/irq.h | 2 +- arch/x86/kvm/lapic.c | 4 +- arch/x86/kvm/lapic.h | 2 +- arch/x86/kvm/vmx.c | 2 +- arch/x86/kvm/x86.c | 13 +- include/kvm/arm_vgic.h | 17 ++- include/kvm/iodev.h | 76 ++++++++++++ include/linux/kvm_host.h | 10 +- virt/kvm/arm/vgic-v2-emul.c | 51 ++++---- virt/kvm/arm/vgic-v3-emul.c | 246 ++++++++++++++++++------------------- virt/kvm/arm/vgic.c | 176 ++++++++++++++++---------- virt/kvm/arm/vgic.h | 29 +++-- virt/kvm/coalesced_mmio.c | 7 +- virt/kvm/eventfd.c | 6 +- virt/kvm/iodev.h | 70 ----------- virt/kvm/kvm_main.c | 34 ++--- 30 files changed, 475 insertions(+), 436 deletions(-) create mode 100644 include/kvm/iodev.h delete mode 100644 virt/kvm/iodev.h -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
