CONTROL_RESPASSPW_EN 579 arch/x86/kernel/amd_iommu_init.c iommu_feature_enable(iommu, CONTROL_RESPASSPW_EN) : CONTROL_RESPASSPW_EN 580 arch/x86/kernel/amd_iommu_init.c iommu_feature_disable(iommu, CONTROL_RESPASSPW_EN);