From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lu Baolu Subject: [PATCH v7 6/9] iommu/vt-d: Return ID associated with an auxiliary domain Date: Fri, 22 Feb 2019 10:19:24 +0800 Message-ID: <20190222021927.13132-7-baolu.lu@linux.intel.com> References: <20190222021927.13132-1-baolu.lu@linux.intel.com> Return-path: In-Reply-To: <20190222021927.13132-1-baolu.lu@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org To: Joerg Roedel , David Woodhouse , Alex Williamson , Kirti Wankhede Cc: ashok.raj@intel.com, sanjay.k.kumar@intel.com, jacob.jun.pan@intel.com, kevin.tian@intel.com, Jean-Philippe Brucker , yi.l.liu@intel.com, yi.y.sun@intel.com, peterx@redhat.com, tiwei.bie@intel.com, xin.zeng@intel.com, iommu@lists.linux-foundation.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Lu Baolu , Jacob Pan List-Id: iommu@lists.linux-foundation.org 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 Cc: Jacob Pan Cc: Kevin Tian Signed-off-by: Sanjay Kumar Signed-off-by: Liu Yi L Signed-off-by: Lu Baolu --- 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 8ecf09db6047..b79c72cc5931 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -5684,6 +5684,15 @@ 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, @@ -5692,6 +5701,7 @@ 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