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| author | Yi Liu <yi.l.liu@intel.com> | 2025-02-26 02:40:12 -0800 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2025-03-04 09:34:54 -0400 |
| commit | 1062d81086156e42878d701b816d2f368b53a77c (patch) | |
| tree | 40bf9277d73abc2aaf1b243c8d3da4899f72e718 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | 5e9f822c9c683ae884fa5e71df41d1647b2876c6 (diff) | |
iommufd: Disallow allocating nested parent domain with fault ID
Allocating a domain with a fault ID indicates that the domain is faultable.
However, there is a gap for the nested parent domain to support PRI. Some
hardware lacks the capability to distinguish whether PRI occurs at stage 1
or stage 2. This limitation may require software-based page table walking
to resolve. Since no in-tree IOMMU driver currently supports this
functionality, it is disallowed. For more details, refer to the related
discussion at [1].
[1] https://lore.kernel.org/linux-iommu/bd1655c6-8b2f-4cfa-adb1-badc00d01811@intel.com/
Link: https://patch.msgid.link/r/20250226104012.82079-1-yi.l.liu@intel.com
Suggested-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions