@@ -252,6 +252,20 @@ static bool qcom_adreno_can_do_ttbr1(struct arm_smmu_device *smmu)
return true;
}
+static void qcom_smmu_set_actlr_dev(struct device *dev, struct arm_smmu_device *smmu, int cbndx,
+ const struct of_device_id *client_match)
+{
+ const struct of_device_id *match =
+ of_match_device(client_match, dev);
+
+ if (!match) {
+ dev_notice(dev, "no ACTLR settings present\n");
+ return;
+ }
+
+ arm_smmu_cb_write(smmu, cbndx, ARM_SMMU_CB_ACTLR, (u64)match->data);
+}
+
static int qcom_adreno_smmu_init_context(struct arm_smmu_domain *smmu_domain,
struct io_pgtable_cfg *pgtbl_cfg, struct device *dev)
{
@@ -316,8 +330,20 @@ static const struct of_device_id qcom_smmu_client_of_match[] __maybe_unused = {
static int qcom_smmu_init_context(struct arm_smmu_domain *smmu_domain,
struct io_pgtable_cfg *pgtbl_cfg, struct device *dev)
{
+ struct arm_smmu_device *smmu = smmu_domain->smmu;
+ struct qcom_smmu *qsmmu = to_qcom_smmu(smmu);
+ const struct of_device_id *client_match;
+ int cbndx = smmu_domain->cfg.cbndx;
+
smmu_domain->cfg.flush_walk_prefer_tlbiasid = true;
+ client_match = qsmmu->data->client_match;
+
+ if (!client_match)
+ return 0;
+
+ qcom_smmu_set_actlr_dev(dev, smmu, cbndx, client_match);
+
return 0;
}
@@ -28,6 +28,7 @@ struct qcom_smmu_match_data {
const struct qcom_smmu_config *cfg;
const struct arm_smmu_impl *impl;
const struct arm_smmu_impl *adreno_impl;
+ const struct of_device_id * const client_match;
};
irqreturn_t qcom_smmu_context_fault(int irq, void *dev);
Currently in Qualcomm SoCs the default prefetch is set to 1 which allows the TLB to fetch just the next page table. MMU-500 features ACTLR register which is implementation defined and is used for Qualcomm SoCs to have a custom prefetch setting enabling TLB to prefetch the next set of page tables accordingly allowing for faster translations. ACTLR value is unique for each SMR (Stream matching register) and stored in a pre-populated table. This value is set to the register during context bank initialisation. Signed-off-by: Bibek Kumar Patro <quic_bibekkum@quicinc.com> --- drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 26 ++++++++++++++++++++++ drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h | 1 + 2 files changed, 27 insertions(+) -- 2.34.1