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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Now, vmids are stored in vSMMU objects. So all vSMMUs assigned to the same VM can share a s2_parent domain. This means a vIOMMU allocation per device behind one SMMU can be given with a s2_parent domain that's allocated per another device behind another SMMU, i.e. s2_parent->smmu != master->smmu. Remove the validation line to allow this use case. Signed-off-by: Nicolin Chen --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c index 2c5a9d0abed5..9bfa5fa5bafa 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c @@ -378,9 +378,6 @@ struct iommufd_viommu *arm_vsmmu_alloc(struct device *dev, if (!(smmu->features & ARM_SMMU_FEAT_NESTING)) return ERR_PTR(-EOPNOTSUPP); - if (s2_parent->smmu != master->smmu) - return ERR_PTR(-EINVAL); - /* * FORCE_SYNC is not set with FEAT_NESTING. Some study of the exact HW * defect is needed to determine if arm_vsmmu_cache_invalidate() needs -- 2.43.0