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iommu/vt-d: Block PASID attachment to nested domain with dirty tracking

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Kernel lacks dirty tracking support on nested domain attached to PASID,
fails the attachment early if nesting parent domain is dirty tracking
configured, otherwise dirty pages would be lost.

Cc: stable@vger.kernel.org
Fixes: 67f6f56b59 ("iommu/vt-d: Add set_dev_pasid callback for nested domain")
Suggested-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20260330101108.12594-2-zhenzhong.duan@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Fixes: 67f6f56b59 ("iommu/vt-d: Add set_dev_pasid callback for nested  domain")
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Zhenzhong Duan
2026-04-02 14:57:24 +08:00
committed by Joerg Roedel
parent f338e77383
commit cc5bd898ff
1 changed files with 5 additions and 1 deletions
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6
drivers/iommu/intel/nested.c
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@@ -148,6 +148,7 @@ static int intel_nested_set_dev_pasid(struct iommu_domain *domain,
{
struct device_domain_info *info = dev_iommu_priv_get(dev);
struct dmar_domain *dmar_domain = to_dmar_domain(domain);
struct iommu_domain *s2_domain = &dmar_domain->s2_domain->domain;
struct intel_iommu *iommu = info->iommu;
struct dev_pasid_info *dev_pasid;
int ret;
@@ -155,10 +156,13 @@ static int intel_nested_set_dev_pasid(struct iommu_domain *domain,
if (!pasid_supported(iommu) || dev_is_real_dma_subdevice(dev))
return -EOPNOTSUPP;
if (s2_domain->dirty_ops)
return -EINVAL;
if (context_copied(iommu, info->bus, info->devfn))
return -EBUSY;
ret = paging_domain_compatible(&dmar_domain->s2_domain->domain, dev);
ret = paging_domain_compatible(s2_domain, dev);
if (ret)
return ret;