diff options
Diffstat (limited to 'drivers/iommu/iommu-sva.c')
| -rw-r--r-- | drivers/iommu/iommu-sva.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/iommu/iommu-sva.c b/drivers/iommu/iommu-sva.c index 24bf9b2b58aa..dd76a1a09cf7 100644 --- a/drivers/iommu/iommu-sva.c +++ b/drivers/iommu/iommu-sva.c @@ -2,6 +2,7 @@ /* * Helpers for IOMMU drivers implementing SVA */ +#include <linux/mmu_context.h> #include <linux/mutex.h> #include <linux/sched/mm.h> #include <linux/iommu.h> @@ -32,16 +33,19 @@ int iommu_sva_alloc_pasid(struct mm_struct *mm, ioasid_t min, ioasid_t max) min == 0 || max < min) return -EINVAL; + if (!arch_pgtable_dma_compat(mm)) + return -EBUSY; + mutex_lock(&iommu_sva_lock); /* Is a PASID already associated with this mm? */ - if (pasid_valid(mm->pasid)) { + if (mm_valid_pasid(mm)) { if (mm->pasid < min || mm->pasid >= max) ret = -EOVERFLOW; goto out; } pasid = ioasid_alloc(&iommu_sva_pasid, min, max, mm); - if (!pasid_valid(pasid)) + if (pasid == INVALID_IOASID) ret = -ENOMEM; else mm_pasid_set(mm, pasid); |