Commit 9bf7bc9a authored by Zhangfei Gao's avatar Zhangfei Gao Committed by Kunkun Jiang
Browse files

arm-smmu-v3: remove limitation of S2FWB or CANWBS 

virt inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/IB4WDJ
CVE: NA

--------------------------------

Remove the limitation of S2FWB or CANWBS temperatily.
S2FWB will be supported in the new chip.
CANWBS can be supported via device FW.

https://patches.linaro.org/project/linux-acpi/patch/3-v3-e2e16cd7467f+2a6a1-smmuv3_nesting_jgg@nvidia.com/



Signed-off-by: default avatarZhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: default avatarKunkun Jiang <jiangkunkun@huawei.com>
parent 6b456264

drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c

+2 −0
Original line number Diff line number Diff line
@@ -390,9 +390,11 @@ struct iommufd_viommu *arm_vsmmu_alloc(struct device *dev, 
	 * things non-coherent using the memattr, but No-Snoop behavior is not

	 * effected.

	 */

	/*

	if (!arm_smmu_master_canwbs(master) &&

	    !(smmu->features & ARM_SMMU_FEAT_S2FWB))

		return ERR_PTR(-EOPNOTSUPP);

	*/



	vsmmu = iommufd_viommu_alloc(ictx, struct arm_vsmmu, core,

				     &arm_vsmmu_ops);