arm64/smmu: use TLBI ASID when invalidating entire range

Patch series "Invalidate secondary IOMMU TLB on permission upgrade", v4.

The main change is to move secondary TLB invalidation mmu notifier
callbacks into the architecture specific TLB flushing functions. This
makes secondary TLB invalidation mostly match CPU invalidation while
still allowing efficient range based invalidations based on the
existing TLB batching code.


This patch (of 5):

The ARM SMMU has a specific command for invalidating the TLB for an entire
ASID.  Currently this is used for the IO_PGTABLE API but not for ATS when
called from the MMU notifier.

The current implementation of notifiers does not attempt to invalidate
such a large address range, instead walking each VMA and invalidating each
range individually during mmap removal.  However in future SMMU TLB
invalidations are going to be sent as part of the normal flush_tlb_*()
kernel calls.  To better deal with that add handling to use TLBI ASID when
invalidating the entire address space.

Link: https://lkml.kernel.org/r/cover.1eca029b8603ef4eebe5b41eae51facfc5920c41.1690292440.git-series.apopple@nvidia.com
Link: https://lkml.kernel.org/r/ba5f0ec5fbc2ab188797524d3687e075e2412a2b.1690292440.git-series.apopple@nvidia.com
Signed-off-by: Alistair Popple <[email protected]>
Reviewed-by: Jason Gunthorpe <[email protected]>
Cc: Andrew Donnellan <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Chaitanya Kumar Borah <[email protected]>
Cc: Frederic Barrat <[email protected]>
Cc: John Hubbard <[email protected]>
Cc: Kevin Tian <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Nicolin Chen <[email protected]>
Cc: Robin Murphy <[email protected]>
Cc: Sean Christopherson <[email protected]>
Cc: Tvrtko Ursulin <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Zhi Wang <[email protected]>
Cc: Jason Gunthorpe <[email protected]>
Cc: SeongJae Park <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions