Messages in this thread |  | | Subject | Re: [PATCH V9 10/10] iommu/vt-d: Report PASID format as domain attribute | From | Lu Baolu <> | Date | Thu, 30 Jan 2020 15:54:44 +0800 |
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Hi,
On 2020/1/29 14:01, Jacob Pan wrote: > Report the domain attribute of PASID table format. As multiple formats > of PASID table entry are supported, it is important for the guest to > know which format to use in virtual IOMMU. The result will be used for > binding device with guest PASID. > > Signed-off-by: Liu Yi L <yi.l.liu@intel.com> > Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> > --- > drivers/iommu/intel-iommu.c | 22 ++++++++++++++++++++++ > include/linux/iommu.h | 1 + > 2 files changed, 23 insertions(+) > > diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c > index 2f0bf7cc70ce..b3778e86dc32 100644 > --- a/drivers/iommu/intel-iommu.c > +++ b/drivers/iommu/intel-iommu.c > @@ -6413,6 +6413,27 @@ intel_iommu_domain_set_attr(struct iommu_domain *domain, > return ret; > } > > +static int intel_iommu_domain_get_attr(struct iommu_domain *domain, > + enum iommu_attr attr, void *data) > +{ > + /* Only used for guest */ > + switch (domain->type) { > + case IOMMU_DOMAIN_DMA: > + return -ENODEV; > + case IOMMU_DOMAIN_UNMANAGED: > + switch (attr) { > + case DOMAIN_ATTR_PASID_FORMAT: > + *(int *)data = IOMMU_PASID_FORMAT_INTEL_VTD; > + return 0; > + default: > + return -ENODEV; > + } > + break; > + default: > + return -EINVAL; > + } > +} > + > const struct iommu_ops intel_iommu_ops = { > .capable = intel_iommu_capable, > .domain_alloc = intel_iommu_domain_alloc, > @@ -6432,6 +6453,7 @@ const struct iommu_ops intel_iommu_ops = { > .put_resv_regions = intel_iommu_put_resv_regions, > .apply_resv_region = intel_iommu_apply_resv_region, > .device_group = pci_device_group, > + .domain_get_attr = intel_iommu_domain_get_attr, > .dev_has_feat = intel_iommu_dev_has_feat, > .dev_feat_enabled = intel_iommu_dev_feat_enabled, > .dev_enable_feat = intel_iommu_dev_enable_feat, > diff --git a/include/linux/iommu.h b/include/linux/iommu.h > index f2223cbb5fd5..9718c109ea0a 100644 > --- a/include/linux/iommu.h > +++ b/include/linux/iommu.h > @@ -126,6 +126,7 @@ enum iommu_attr { > DOMAIN_ATTR_FSL_PAMUV1, > DOMAIN_ATTR_NESTING, /* two stages of translation */ > DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE, > + DOMAIN_ATTR_PASID_FORMAT, > DOMAIN_ATTR_MAX, > };
Need to separate the new domain attribution definition and the vt-d implementation.
Best regards, baolu
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