diff options
| author | Sheng Yang <sheng@linux.intel.com> | 2009-03-18 15:33:06 +0800 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-03-24 09:42:51 +0000 |
| commit | dbb9fd8630e95b6155aff658a2b5f80e95ca2bc6 (patch) | |
| tree | b24caff50e1c5bfb428cb7422608bfef95d916e8 /drivers/pci | |
| parent | 58c610bd1a3f50820e45a7c09ec0e44d2cda15dd (diff) | |
iommu: Add domain_has_cap iommu_ops
This iommu_op can tell if domain have a specific capability, like snooping
control for Intel IOMMU, which can be used by other components of kernel to
adjust the behaviour.
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index be999ff025a..3778ab149ba 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -3158,6 +3158,17 @@ static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain, return phys; } +static int intel_iommu_domain_has_cap(struct iommu_domain *domain, + unsigned long cap) +{ + struct dmar_domain *dmar_domain = domain->priv; + + if (cap == IOMMU_CAP_CACHE_COHERENCY) + return dmar_domain->iommu_snooping; + + return 0; +} + static struct iommu_ops intel_iommu_ops = { .domain_init = intel_iommu_domain_init, .domain_destroy = intel_iommu_domain_destroy, @@ -3166,6 +3177,7 @@ static struct iommu_ops intel_iommu_ops = { .map = intel_iommu_map_range, .unmap = intel_iommu_unmap_range, .iova_to_phys = intel_iommu_iova_to_phys, + .domain_has_cap = intel_iommu_domain_has_cap, }; static void __devinit quirk_iommu_rwbf(struct pci_dev *dev) |