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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Aug 09, 2023 at 02:49:41PM +0100, Will Deacon wrote: > > @@ -1360,10 +1357,14 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_master *master, u32 sid, > > !master->stall_enabled) > > dst[1] |= cpu_to_le64(STRTAB_STE_1_S1STALLD); > > > > - val |= (s1_cfg->cdcfg.cdtab_dma & STRTAB_STE_0_S1CTXPTR_MASK) | > > - FIELD_PREP(STRTAB_STE_0_CFG, STRTAB_STE_0_CFG_S1_TRANS) | > > - FIELD_PREP(STRTAB_STE_0_S1CDMAX, s1_cfg->s1cdmax) | > > - FIELD_PREP(STRTAB_STE_0_S1FMT, s1_cfg->s1fmt); > > + val |= (cd_table->cdtab_dma & STRTAB_STE_0_S1CTXPTR_MASK) | > > + FIELD_PREP(STRTAB_STE_0_CFG, STRTAB_STE_0_CFG_S1_TRANS) | > > + FIELD_PREP(STRTAB_STE_0_S1CDMAX, > > + cd_table->max_cds_bits) | > > + FIELD_PREP(STRTAB_STE_0_S1FMT, > > + cd_table->l1_desc ? > > + STRTAB_STE_0_S1FMT_64K_L2 : > > + STRTAB_STE_0_S1FMT_LINEAR); > > magically know that we're using 64k tables. > > Why is this an improvement to the driver? Put the above in a function arm_smmu_get_cd_ste(struct arm_smmu_ctx_desc_cfg *cdtab, void *ste) And it makes more sense. We don't need the driver to precompute the "s1_cfg" parameters and store them in a redundant struct along side the ctx_desc_cfg when we can compute those same values on the fly with no cost. Jason _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel