Messages in this thread | | | From | "Tian, Kevin" <> | Subject | RE: [PATCH v10 11/12] iommu: Per-domain I/O page fault handling | Date | Thu, 7 Jul 2022 02:06:02 +0000 |
| |
> From: Lu Baolu <baolu.lu@linux.intel.com> > Sent: Tuesday, July 5, 2022 1:07 PM > > Tweak the I/O page fault handling framework to route the page faults to > the domain and call the page fault handler retrieved from the domain. > This makes the I/O page fault handling framework possible to serve more > usage scenarios as long as they have an IOMMU domain and install a page > fault handler in it. Some unused functions are also removed to avoid > dead code. > > The iommu_get_domain_for_dev_pasid() which retrieves attached domain > for a {device, PASID} pair is used. It will be used by the page fault > handling framework which knows {device, PASID} reported from the iommu > driver. We have a guarantee that the SVA domain doesn't go away during > IOPF handling, because unbind() won't free the domain until all the > pending page requests have been flushed from the pipeline. The drivers > either call iopf_queue_flush_dev() explicitly, or in stall case, the > device driver is required to flush all DMAs including stalled > transactions before calling unbind(). > > This also renames iopf_handle_group() to iopf_handler() to avoid > confusing. > > Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> > Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> > Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org> > Tested-by: Tony Zhu <tony.zhu@intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
| |