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| author | Jacob Pan <jacob.pan@linux.microsoft.com> | 2026-07-06 11:48:32 -0700 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2026-07-14 12:05:01 -0300 |
| commit | 60decab325a439b1f6108be276c08a11e80c5529 (patch) | |
| tree | b4b377c9bd0da977fa071c128c226594c1748e01 /tools/perf/scripts/python/stackcollapse.py | |
| parent | 072f454c38fd60afafb7325cc179d8ef241d58a5 (diff) | |
iommufd: Add an ioctl to query PA from IOVA for noiommu mode
To support no-IOMMU mode where userspace drivers perform unsafe DMA
using physical addresses, introduce a new API to retrieve the
physical address of a user-allocated DMA buffer that has been mapped to
an IOVA via IOMMU_IOAS_MAP. The mapping is backed by SW-only I/O page
tables maintained by the GENERIC_PT framework.
Link: https://patch.msgid.link/r/a60a601509688e8552c75e668deb548c93974a3b.1783360051.git.jacob.pan@linux.microsoft.com
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Co-developed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Jacob Pan <jacob.pan@linux.microsoft.com>
Fixes: 2c6cf6ab1564 ("iommufd: Allow binding to a noiommu device")
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions