From: Lu Baolu <[email protected]> This adds the support for IOMMU_HWPT_DATA_VTD_S1 type.
Signed-off-by: Lu Baolu <[email protected]> Signed-off-by: Yi Liu <[email protected]> --- drivers/iommu/intel/iommu.c | 39 ++++++++++++++++++++++++++----------- 1 file changed, 28 insertions(+), 11 deletions(-) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index b47025fbdea4..c7704e7efd4a 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -4076,7 +4076,7 @@ intel_iommu_domain_alloc_user(struct device *dev, u32 flags, struct iommu_domain *parent, const struct iommu_user_data *user_data) { - struct iommu_domain *domain; + bool request_nest_parent = flags & IOMMU_HWPT_ALLOC_NEST_PARENT; struct intel_iommu *iommu; if (flags & (~IOMMU_HWPT_ALLOC_NEST_PARENT)) @@ -4086,18 +4086,35 @@ intel_iommu_domain_alloc_user(struct device *dev, u32 flags, if (!iommu) return ERR_PTR(-ENODEV); - if ((flags & IOMMU_HWPT_ALLOC_NEST_PARENT) && !ecap_nest(iommu->ecap)) + if (!user_data) { /* Must be PAGING domain */ + struct iommu_domain *domain; + + if (request_nest_parent && !ecap_nest(iommu->ecap)) + return ERR_PTR(-EOPNOTSUPP); + if (parent) + return ERR_PTR(-EINVAL); + /* + * domain_alloc_user op needs to fully initialize a domain + * before return, so uses iommu_domain_alloc() here for + * simple. + */ + domain = iommu_domain_alloc(dev->bus); + if (!domain) + return ERR_PTR(-ENOMEM); + return domain; + } + + /* Must be nested domain */ + if (!ecap_nest(iommu->ecap)) + return ERR_PTR(-EOPNOTSUPP); + if (user_data->type != IOMMU_HWPT_DATA_VTD_S1) return ERR_PTR(-EOPNOTSUPP); + if (!parent || parent->ops != intel_iommu_ops.default_domain_ops) + return ERR_PTR(-EINVAL); + if (request_nest_parent) + return ERR_PTR(-EINVAL); - /* - * domain_alloc_user op needs to fully initialize a domain - * before return, so uses iommu_domain_alloc() here for - * simple. - */ - domain = iommu_domain_alloc(dev->bus); - if (!domain) - domain = ERR_PTR(-ENOMEM); - return domain; + return intel_nested_domain_alloc(parent, user_data); } static void intel_iommu_domain_free(struct iommu_domain *domain) -- 2.34.1
