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Devices with on-chip IOMMU or vendor specific IOTLB implementation may need to restore iotlb mapping to the initial or default state using the .reset_map op, as it's desirable for some parent devices to not work with DMA ops and maintain a simple IOMMU model with .reset_map. In particular, device reset should not cause mapping to go away on such IOTLB model, so persistent mapping is implied across reset. Before the userspace process using vhost-vdpa is gone, give it a chance to reset iotlb back to the initial state in vhost_vdpa_cleanup(). Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com> Acked-by: Eugenio Pérez <eperezma@redhat.com> Message-Id: <1697880319-4937-3-git-send-email-si-wei.liu@oracle.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Tested-by: Lei Yang <leiyang@redhat.com> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.