Messages in this thread | | | Date | Thu, 22 Sep 2022 13:05:07 -0300 | From | Jason Gunthorpe <> | Subject | Re: [PATCH v13 11/13] iommu: Prepare IOMMU domain for IOPF |
| |
On Tue, Sep 06, 2022 at 08:44:56PM +0800, Lu Baolu wrote: > This adds some mechanisms around the iommu_domain so that the I/O page > fault handling framework could route a page fault to the domain and > call the fault handler from it. > > Add pointers to the page fault handler and its private data in struct > iommu_domain. The fault handler will be called with the private data > as a parameter once a page fault is routed to the domain. Any kernel > component which owns an iommu domain could install handler and its > private parameter so that the page fault could be further routed and > handled. > > This also prepares the SVA implementation to be the first consumer of > the per-domain page fault handling model. The I/O page fault handler > for SVA is copied to the SVA file with mmget_not_zero() added before > mmap_read_lock(). > > Suggested-by: Jean-Philippe Brucker <jean-philippe@linaro.org> > Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> > Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> > Reviewed-by: Kevin Tian <kevin.tian@intel.com> > Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org> > Tested-by: Tony Zhu <tony.zhu@intel.com> > --- > include/linux/iommu.h | 3 ++ > drivers/iommu/iommu-sva-lib.h | 8 +++++ > drivers/iommu/io-pgfault.c | 7 +++++ > drivers/iommu/iommu-sva-lib.c | 58 +++++++++++++++++++++++++++++++++++ > drivers/iommu/iommu.c | 4 +++ > 5 files changed, 80 insertions(+)
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Jason
| |