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Introduce the DMA logging feature support in the vfio core layer. It includes the processing of the device start/stop/report DMA logging UAPIs and calling the relevant driver 'op' to do the work. Specifically, Upon start, the core translates the given input ranges into an interval tree, checks for unexpected overlapping, non aligned ranges and then pass the translated input to the driver for start tracking the given ranges. Upon report, the core translates the given input user space bitmap and page size into an IOVA kernel bitmap iterator. Then it iterates it and call the driver to set the corresponding bits for the dirtied pages in a specific IOVA range. Upon stop, the driver is called to stop the previous started tracking. The next patches from the series will introduce the mlx5 driver implementation for the logging ops. Signed-off-by: Yishai Hadas <yishaih@nvidia.com> Link: https://lore.kernel.org/r/20220908183448.195262-6-yishaih@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
54 lines
1.5 KiB
Plaintext
54 lines
1.5 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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menuconfig VFIO
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tristate "VFIO Non-Privileged userspace driver framework"
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select IOMMU_API
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select VFIO_IOMMU_TYPE1 if MMU && (X86 || S390 || ARM || ARM64)
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select INTERVAL_TREE
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help
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VFIO provides a framework for secure userspace device drivers.
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See Documentation/driver-api/vfio.rst for more details.
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If you don't know what to do here, say N.
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if VFIO
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config VFIO_IOMMU_TYPE1
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tristate
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default n
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config VFIO_IOMMU_SPAPR_TCE
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tristate
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depends on SPAPR_TCE_IOMMU
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default VFIO
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config VFIO_SPAPR_EEH
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tristate
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depends on EEH && VFIO_IOMMU_SPAPR_TCE
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default VFIO
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config VFIO_VIRQFD
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tristate
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select EVENTFD
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default n
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config VFIO_NOIOMMU
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bool "VFIO No-IOMMU support"
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help
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VFIO is built on the ability to isolate devices using the IOMMU.
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Only with an IOMMU can userspace access to DMA capable devices be
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considered secure. VFIO No-IOMMU mode enables IOMMU groups for
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devices without IOMMU backing for the purpose of re-using the VFIO
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infrastructure in a non-secure mode. Use of this mode will result
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in an unsupportable kernel and will therefore taint the kernel.
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Device assignment to virtual machines is also not possible with
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this mode since there is no IOMMU to provide DMA translation.
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If you don't know what to do here, say N.
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source "drivers/vfio/pci/Kconfig"
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source "drivers/vfio/platform/Kconfig"
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source "drivers/vfio/mdev/Kconfig"
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source "drivers/vfio/fsl-mc/Kconfig"
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endif
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source "virt/lib/Kconfig"
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