This patch series aims to implement VFIO support for platform devices that reside behind an IOMMU. Examples of such devices are devices behind an ARM SMMU, or behind a Samsung Exynos System MMU. The effort on VFIO_PLATFORM has been partially conducted under the SAVE FP7 project. http://www.virtualopensystems.com/en/research/innovation-projects/fp7-save/ This version of the VFIO_PLATFORM patch series includes a number of fixes, and introduces more complete support for eventfds. An eventfd can now be set by the user, that can be used to mask and unmask a given interrupt. The API used is based on the existing VFIO API that is also used with PCI devices. Only devices that include a basic set of IRQs and memory regions are targeted; devices with complex relationships with other devices on a device tree are not taken into account at this stage. Using the VFIO_IOMMU_TYPE1 driver with the VFIO_PLATFORM driver introduced here, the standard VFIO ioctls have been found to be working on FastModels with an ARM SMMU (MMU400). Testing was based on the ARM PL330 DMA Controller featured on those models. Reading/writing to and MMAPing device memory regions is also supported via the device file descriptor. Kim Phillip's driver_override patch for platform bus devices is included in the patch series. A copy with all the dependencies applied can be cloned from branch vfio-platform-v6 at git@xxxxxxxxxx:virtualopensystems/linux-kvm-arm.git For those who want to apply manually, these patches are based on Linux version 3.15-rc8. Changes since v5: - Full eventfd support for IRQ masking and unmasking. - Changed IOMMU_EXEC to IOMMU_NOEXEC, along with related flags in VFIO. - Other fixes based on reviewer comments. Changes since v4: - Use static offsets for each region in the VFIO device fd - Include patch in the series for the ARM SMMU to expose IOMMU_EXEC availability via IOMMU_CAP_DMA_EXEC - Rebased on VFIO multi domain support: - IOMMU_EXEC is now available if at least one IOMMU in the container supports it - Expose IOMMU_EXEC if available via the capability VFIO_IOMMU_PROT_EXEC - Some bug fixes Changes since v3: - Use Kim Phillips' driver_probe_device() Changes since v2: - Fixed Read/Write and MMAP on device regions - Removed dependency on Device Tree - Interrupts support - Interrupt masking/unmasking - Automask level sensitive interrupts - Introduced VFIO_DMA_MAP_FLAG_EXEC - Code clean ups Antonios Motakis (19): iommu/arm-smmu: change IOMMU_EXEC to IOMMU_NOEXEC iommu: add capability IOMMU_CAP_NOEXEC iommu/arm-smmu: add IOMMU_CAP_NOEXEC to the ARM SMMU driver iommu/arm-smmu: add capability IOMMU_CAP_INTR_REMAP vfio/iommu_type1: support for platform bus devices on ARM vfio: introduce the VFIO_DMA_MAP_FLAG_NOEXEC flag vfio/iommu_type1: implement the VFIO_DMA_MAP_FLAG_NOEXEC flag vfio/platform: initial skeleton of VFIO support for platform devices vfio/platform: return info for device and its memory mapped IO regions vfio/platform: read and write support for the device fd vfio/platform: support MMAP of MMIO regions vfio/platform: return IRQ info vfio/platform: initial interrupts support vfio/platform: support for maskable and automasked interrupts vfio: move eventfd support code for VFIO_PCI to a sepparate file vfio: add local lock in virqfd instead of depending on VFIO PCI vfio: pass an opaque pointer on virqfd initialization vfio: initialize the virqfd workqueue in VFIO generic code vfio/platform: implement IRQ masking/unmasking via an eventfd Kim Phillips (1): driver core: platform: add device binding path 'driver_override' Documentation/ABI/testing/sysfs-bus-platform | 20 ++ drivers/base/platform.c | 47 +++ drivers/iommu/arm-smmu.c | 4 +- drivers/vfio/Kconfig | 3 +- drivers/vfio/Makefile | 3 +- drivers/vfio/pci/vfio_pci.c | 8 - drivers/vfio/pci/vfio_pci_intrs.c | 234 +------------- drivers/vfio/pci/vfio_pci_private.h | 3 - drivers/vfio/platform/Kconfig | 9 + drivers/vfio/platform/Makefile | 4 + drivers/vfio/platform/vfio_platform.c | 445 ++++++++++++++++++++++++++ drivers/vfio/platform/vfio_platform_irq.c | 343 ++++++++++++++++++++ drivers/vfio/platform/vfio_platform_private.h | 62 ++++ drivers/vfio/vfio.c | 8 + drivers/vfio/vfio_iommu_type1.c | 30 +- drivers/vfio/virqfd.c | 213 ++++++++++++ include/linux/iommu.h | 7 +- include/linux/platform_device.h | 1 + include/linux/vfio.h | 26 ++ include/uapi/linux/vfio.h | 3 + 20 files changed, 1233 insertions(+), 240 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-bus-platform create mode 100644 drivers/vfio/platform/Kconfig create mode 100644 drivers/vfio/platform/Makefile create mode 100644 drivers/vfio/platform/vfio_platform.c create mode 100644 drivers/vfio/platform/vfio_platform_irq.c create mode 100644 drivers/vfio/platform/vfio_platform_private.h create mode 100644 drivers/vfio/virqfd.c -- 1.8.3.2 -- 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
