[PATCH v7 3/9] iommu/arm-smmu-v3: Encapsulate ctx_desc_cfg init in alloc_cd_tables

From: Michael Shavit
Date: Thu Aug 31 2023 - 13:46:08 EST


This is slighlty cleaner: arm_smmu_ctx_desc_cfg is initialized in a
single function instead of having pieces set ahead-of time by its caller.

Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Reviewed-by: Nicolin Chen <nicolinc@xxxxxxxxxx>
Signed-off-by: Michael Shavit <mshavit@xxxxxxxxxx>
---

(no changes since v1)

drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 5d1977027d2c4..5bb13fadb41ad 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -1132,7 +1132,8 @@ int arm_smmu_write_ctx_desc(struct arm_smmu_domain *smmu_domain, int ssid,
return 0;
}

-static int arm_smmu_alloc_cd_tables(struct arm_smmu_domain *smmu_domain)
+static int arm_smmu_alloc_cd_tables(struct arm_smmu_domain *smmu_domain,
+ struct arm_smmu_master *master)
{
int ret;
size_t l1size;
@@ -1140,6 +1141,7 @@ static int arm_smmu_alloc_cd_tables(struct arm_smmu_domain *smmu_domain)
struct arm_smmu_device *smmu = smmu_domain->smmu;
struct arm_smmu_ctx_desc_cfg *cdcfg = &smmu_domain->cd_table;

+ cdcfg->s1cdmax = master->ssid_bits;
max_contexts = 1 << cdcfg->s1cdmax;

if (!(smmu->features & ARM_SMMU_FEAT_2_LVL_CDTAB) ||
@@ -2105,7 +2107,6 @@ static int arm_smmu_domain_finalise_s1(struct arm_smmu_domain *smmu_domain,
int ret;
u32 asid;
struct arm_smmu_device *smmu = smmu_domain->smmu;
- struct arm_smmu_ctx_desc_cfg *cd_table = &smmu_domain->cd_table;
struct arm_smmu_ctx_desc *cd = &smmu_domain->cd;
typeof(&pgtbl_cfg->arm_lpae_s1_cfg.tcr) tcr = &pgtbl_cfg->arm_lpae_s1_cfg.tcr;

@@ -2118,11 +2119,9 @@ static int arm_smmu_domain_finalise_s1(struct arm_smmu_domain *smmu_domain,
if (ret)
goto out_unlock;

- cd_table->s1cdmax = master->ssid_bits;
-
smmu_domain->stall_enabled = master->stall_enabled;

- ret = arm_smmu_alloc_cd_tables(smmu_domain);
+ ret = arm_smmu_alloc_cd_tables(smmu_domain, master);
if (ret)
goto out_free_asid;

--
2.42.0.283.g2d96d420d3-goog