lkml.org 
[lkml]   [2019]   [Mar]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v8 6/9] iommu/vt-d: Return ID associated with an auxiliary domain
Date
This adds support to return the default pasid associated with
an auxiliary domain. The PCI device which is bound with this
domain should use this value as the pasid for all DMA requests
of the subset of device which is isolated and protected with
this domain.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Sanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
drivers/iommu/intel-iommu.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 28a998afaf74..c137f0f2cf49 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -5697,6 +5697,15 @@ intel_iommu_dev_feat_enabled(struct device *dev, enum iommu_dev_features feat)
return false;
}

+static int
+intel_iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)
+{
+ struct dmar_domain *dmar_domain = to_dmar_domain(domain);
+
+ return dmar_domain->default_pasid > 0 ?
+ dmar_domain->default_pasid : -EINVAL;
+}
+
const struct iommu_ops intel_iommu_ops = {
.capable = intel_iommu_capable,
.domain_alloc = intel_iommu_domain_alloc,
@@ -5705,6 +5714,7 @@ const struct iommu_ops intel_iommu_ops = {
.detach_dev = intel_iommu_detach_device,
.aux_attach_dev = intel_iommu_aux_attach_device,
.aux_detach_dev = intel_iommu_aux_detach_device,
+ .aux_get_pasid = intel_iommu_aux_get_pasid,
.map = intel_iommu_map,
.unmap = intel_iommu_unmap,
.iova_to_phys = intel_iommu_iova_to_phys,
--
2.17.1
\
 
 \ /
  Last update: 2019-03-25 02:39    [W:0.077 / U:9.132 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site