Intel DMA/interrupt remapping drivers scan available PCI/memory devices
at startup and cache discovered hardware topologies. They don't update
cached information if PCI/memory hotplug event happens at runtime, then
the stale information may break DMA/interrupt remapping logic.
This patchset first (Patch 1-12) tries to introduces some helper
functions and fixes several bugs, then (Patch 13,14) uses a global
rwsem and RCU to protect global DMA/interrupt remapping data
structures, and finally (Patch 15-17) hook PCI/memory hotplug events
to update cached information.
It's also a preparation for supporting of DMA/interrupt remapping
hotplug.
V1->V2:
1) fix more bugs in dealing with identify mapping domain
2) address round 1 review comments
Jiang Liu (17):
iommu/vt-d: avoid double free of g_iommus on error recovery path
iommu/vt-d: avoid caching stale domain_device_info and fix memory
leak
iommu/vt-d: avoid caching stale domain_device_info when hot-removing
PCI device
iommu/vt-d: factor out dmar_alloc_dev_scope() for later reuse
iommu/vt-d: move private structures and variables into intel-iommu.c
iommu/vt-d: simplify function get_domain_for_dev()
iommu/vt-d: free resources if failed to create domain for PCIe
endpoint
iommu/vt-d: reduce duplicated code to handle virtual machine domains
iommu/vt-d: fix incorrect iommu_count for si_domain
iommu/vt-d: check for NULL pointer when freeing IOMMU data structure
iommu/vt-d: fix error in detect ATS capability
iommu/vt-d: introduce macro for_each_dev_scope() to walk device scope
entries
iommu/vt-d: introduce a rwsem to protect global data structures
iommu/vt-d: use RCU to protect global resources in interrupt context
iommu/vt-d, PCI: update DRHD/RMRR/ATSR device scope caches when PCI
hotplug happens
iommu/vt-d, PCI: unify the way to process DMAR device scope array
iommu/vt-d: update IOMMU state when memory hotplug happens
drivers/iommu/dmar.c | 412 +++++++++++++------
drivers/iommu/intel-iommu.c | 750 ++++++++++++++++++-----------------
drivers/iommu/intel_irq_remapping.c | 108 +++--
drivers/iommu/iova.c | 64 ++-
include/linux/dmar.h | 74 ++--
include/linux/iova.h | 2 +
6 files changed, 848 insertions(+), 562 deletions(-)
--
1.7.10.4
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