diff mbox series

[v3,04/16] iommu/arm-smmu: Add support for DOMAIN_ATTR_SPLIT_TABLES

Message ID 1559163292-4792-5-git-send-email-jcrouse@codeaurora.org (mailing list archive)
State New, archived
Headers show
Series drm/msm: Per-instance pagetable support | expand

Commit Message

Jordan Crouse May 29, 2019, 8:54 p.m. UTC 
If DOMAIN_ATTR_SPLIT_TABLES is specified for a domain pass
ARM_64_LPAE_SPLIT_S1 to io_pgtable_ops to allocate and
initialize TTBR0 and TTBR1 pagetables.

v3: Moved all the pagetable specific work into io-pgtable-arm
in previous patch

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
---

 drivers/iommu/arm-smmu.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 7537639..33e6928 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -260,6 +260,7 @@  struct arm_smmu_domain {
 	bool				non_strict;
 	struct mutex			init_mutex; /* Protects smmu pointer */
 	spinlock_t			cb_lock; /* Serialises ATS1* ops and TLB syncs */
+	u32 attributes;
 	struct iommu_domain		domain;
 };
 
@@ -835,7 +836,11 @@  static int arm_smmu_init_domain_context(struct iommu_domain *domain,
 		ias = smmu->va_size;
 		oas = smmu->ipa_size;
 		if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH64) {
-			fmt = ARM_64_LPAE_S1;
+			if (smmu_domain->attributes &
+				(1 << DOMAIN_ATTR_SPLIT_TABLES))
+				fmt = ARM_64_LPAE_SPLIT_S1;
+			else
+				fmt = ARM_64_LPAE_S1;
 		} else if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH32_L) {
 			fmt = ARM_32_LPAE_S1;
 			ias = min(ias, 32UL);
@@ -1622,6 +1627,10 @@  static int arm_smmu_domain_get_attr(struct iommu_domain *domain,
 		case DOMAIN_ATTR_NESTING:
 			*(int *)data = (smmu_domain->stage == ARM_SMMU_DOMAIN_NESTED);
 			return 0;
+		case DOMAIN_ATTR_SPLIT_TABLES:
+			*(int *)data = !!(smmu_domain->attributes &
+				(1 << DOMAIN_ATTR_SPLIT_TABLES));
+			return 0;
 		default:
 			return -ENODEV;
 		}
@@ -1662,6 +1671,11 @@  static int arm_smmu_domain_set_attr(struct iommu_domain *domain,
 			else
 				smmu_domain->stage = ARM_SMMU_DOMAIN_S1;
 			break;
+		case DOMAIN_ATTR_SPLIT_TABLES:
+			if (*((int *)data))
+				smmu_domain->attributes |=
+					(1 << DOMAIN_ATTR_SPLIT_TABLES);
+			break;
 		default:
 			ret = -ENODEV;
 		}