42ee53f9bf
DMA logging allows a device to internally record what DMAs the device is initiating and report them back to userspace. It is part of the VFIO migration infrastructure that allows implementing dirty page tracking during the pre copy phase of live migration. Only DMA WRITEs are logged, and this API is not connected to VFIO_DEVICE_FEATURE_MIG_DEVICE_STATE. This patch introduces the DMA logging involved uAPIs. It uses the FEATURE ioctl with its GET/SET/PROBE options as of below. It exposes a PROBE option to detect if the device supports DMA logging. It exposes a SET option to start device DMA logging in given IOVAs ranges. It exposes a SET option to stop device DMA logging that was previously started. It exposes a GET option to read back and clear the device DMA log. Extra details exist as part of vfio.h per a specific option. Signed-off-by: Yishai Hadas <yishaih@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/20220908183448.195262-4-yishaih@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com> |
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| .. | ||
| asm-generic | ||
| drm | ||
| linux | ||
| misc | ||
| mtd | ||
| rdma | ||
| scsi | ||
| sound | ||
| video | ||
| xen | ||
| Kbuild | ||