arm_smmu_cb_writeq
arm_smmu_cb_writeq(smmu, idx, ARM_SMMU_CB_ATS1PR, va);
arm_smmu_cb_writeq(smmu, idx, reg, iova);
arm_smmu_cb_writeq(smmu, idx, reg, iova);
arm_smmu_cb_writeq(smmu, idx, ARM_SMMU_CB_TTBR0, cb->ttbr[0]);
arm_smmu_cb_writeq(smmu, idx, ARM_SMMU_CB_TTBR1,