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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2020-01-02 01:18:18 +0100 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-01-07 14:05:58 +0100 |
| commit | 33cd6e642d6a76c1d338ce25cba5fd79a5029011 (patch) | |
| tree | 89ae6c4a6b8c97a1d3e6a83882d4cb04cf992804 /drivers/iommu/dmar.c | |
| parent | iommu/vt-d: Setup pasid entries for iova over first level (diff) | |
| download | linux-33cd6e642d6a76c1d338ce25cba5fd79a5029011.tar.xz linux-33cd6e642d6a76c1d338ce25cba5fd79a5029011.zip | |
iommu/vt-d: Flush PASID-based iotlb for iova over first level
When software has changed first-level tables, it should invalidate
the affected IOTLB and the paging-structure-caches using the PASID-
based-IOTLB Invalidate Descriptor defined in spec 6.5.2.4.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/dmar.c')
| -rw-r--r-- | drivers/iommu/dmar.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 3acfa6a25fa2..fb30d5053664 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -1371,6 +1371,47 @@ void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid, qi_submit_sync(&desc, iommu); } +/* PASID-based IOTLB invalidation */ +void qi_flush_piotlb(struct intel_iommu *iommu, u16 did, u32 pasid, u64 addr, + unsigned long npages, bool ih) +{ + struct qi_desc desc = {.qw2 = 0, .qw3 = 0}; + + /* + * npages == -1 means a PASID-selective invalidation, otherwise, + * a positive value for Page-selective-within-PASID invalidation. + * 0 is not a valid input. + */ + if (WARN_ON(!npages)) { + pr_err("Invalid input npages = %ld\n", npages); + return; + } + + if (npages == -1) { + desc.qw0 = QI_EIOTLB_PASID(pasid) | + QI_EIOTLB_DID(did) | + QI_EIOTLB_GRAN(QI_GRAN_NONG_PASID) | + QI_EIOTLB_TYPE; + desc.qw1 = 0; + } else { + int mask = ilog2(__roundup_pow_of_two(npages)); + unsigned long align = (1ULL << (VTD_PAGE_SHIFT + mask)); + + if (WARN_ON_ONCE(!ALIGN(addr, align))) + addr &= ~(align - 1); + + desc.qw0 = QI_EIOTLB_PASID(pasid) | + QI_EIOTLB_DID(did) | + QI_EIOTLB_GRAN(QI_GRAN_PSI_PASID) | + QI_EIOTLB_TYPE; + desc.qw1 = QI_EIOTLB_ADDR(addr) | + QI_EIOTLB_IH(ih) | + QI_EIOTLB_AM(mask); + } + + qi_submit_sync(&desc, iommu); +} + /* * Disable Queued Invalidation interface. */ |