CONTROL_GAINT_EN
iommu_feature_disable(iommu, CONTROL_GAINT_EN);
iommu_feature_disable(iommu, CONTROL_GAINT_EN);
amd_iommu_restart_log(iommu, "GA", CONTROL_GAINT_EN,
iommu_feature_enable(iommu, CONTROL_GAINT_EN);