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arm64/smmu: use TLBI ASID when invalidating entire range

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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 <apopple@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Cc: Andrew Donnellan <ajd@linux.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Cc: Frederic Barrat <fbarrat@linux.ibm.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Nicolin Chen <nicolinc@nvidia.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Will Deacon <will@kernel.org>
Cc: Zhi Wang <zhi.wang.linux@gmail.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Alistair Popple 2023-07-25 23:42:03 +10:00 committed by Andrew Morton
parent 19a462f06e
commit 38b14e2e3d
1 changed files with 13 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
View File

@ -200,10 +200,20 @@ static void arm_smmu_mm_invalidate_range(struct mmu_notifier *mn,
* range. So do a simple translation here by calculating size correctly.
*/
size = end - start;
if (size == ULONG_MAX)
size = 0;
if (!(smmu_domain->smmu->features & ARM_SMMU_FEAT_BTM)) {
if (!size)
arm_smmu_tlb_inv_asid(smmu_domain->smmu,
smmu_mn->cd->asid);
else
arm_smmu_tlb_inv_range_asid(start, size,
smmu_mn->cd->asid,
PAGE_SIZE, false,
smmu_domain);
}
if (!(smmu_domain->smmu->features & ARM_SMMU_FEAT_BTM))
arm_smmu_tlb_inv_range_asid(start, size, smmu_mn->cd->asid,
PAGE_SIZE, false, smmu_domain);
arm_smmu_atc_inv_domain(smmu_domain, mm->pasid, start, size);
}