diff options
| author |   Will Deacon <will.deacon@arm.com> | 2016-02-18 12:05:57 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2016-02-18 15:02:44 +0000 |
| commit | cbf8277ef4562075eb4e3932ccd60cc11ee9454c (patch) | |
| tree | 87ad12c98e3264e58b7ad62c972ed8a5e8e1c068 /drivers/iommu/arm-smmu.c | |
| parent | iommu/arm-smmu: Don't fail device attach if already attached to a domain (diff) | |
| download | linux-dev-cbf8277ef4562075eb4e3932ccd60cc11ee9454c.tar.xz linux-dev-cbf8277ef4562075eb4e3932ccd60cc11ee9454c.zip | |
iommu/arm-smmu: Treat IOMMU_DOMAIN_DMA as bypass for now
Until all upstream devices have their DMA ops swizzled to point at the
SMMU, we need to treat the IOMMU_DOMAIN_DMA domain as bypass to avoid
putting devices into an empty address space when detaching from VFIO.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/iommu/arm-smmu.c')
| -rw-r--r-- | drivers/iommu/arm-smmu.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index f21332a15040..2409e3bd3df2 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1094,6 +1094,13 @@ static int arm_smmu_domain_add_master(struct arm_smmu_domain *smmu_domain, if (ret) return ret == -EEXIST ? 0 : ret; + /* + * FIXME: This won't be needed once we have IOMMU-backed DMA ops + * for all devices behind the SMMU. + */ + if (smmu_domain->domain.type == IOMMU_DOMAIN_DMA) + return 0; + for (i = 0; i < cfg->num_streamids; ++i) { u32 idx, s2cr; |