[PATCH v11 2/8] iommu/arm-smmu: initialize the msi geometry and advertise iommu-msi support
From: eric.auger@redhat.com (Eric Auger)
Date: 2016-07-19 12:55:45
Also in:
kvm, kvmarm, linux-iommu, lkml
Subsystem:
iommu subsystem, the rest · Maintainers:
Joerg Roedel, Will Deacon, Linus Torvalds
On ARM, MSI write transactions from device upstream to the smmu are conveyed through the iommu. Therefore target physical addresses must be mapped and DOMAIN_ATTR_MSI_GEOMETRY advertises the support of the IOMMU-MSI API. Signed-off-by: Eric Auger <eric.auger@redhat.com> --- v8 -> v9: - reword the title and patch description v7 -> v8: - use DOMAIN_ATTR_MSI_GEOMETRY v4 -> v5: - don't handle fsl_pamu_domain anymore - handle arm-smmu-v3 --- drivers/iommu/arm-smmu-v3.c | 2 ++ drivers/iommu/arm-smmu.c | 3 +++ 2 files changed, 5 insertions(+)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 5f6b3bc..066d92c 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c@@ -1397,6 +1397,7 @@ static bool arm_smmu_capable(enum iommu_cap cap) static struct iommu_domain *arm_smmu_domain_alloc(unsigned type) { struct arm_smmu_domain *smmu_domain; + struct iommu_domain_msi_geometry msi_geometry = {0, 0, true}; if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA) return NULL;
@@ -1415,6 +1416,7 @@ static struct iommu_domain *arm_smmu_domain_alloc(unsigned type) kfree(smmu_domain); return NULL; } + smmu_domain->domain.msi_geometry = msi_geometry; mutex_init(&smmu_domain->init_mutex); spin_lock_init(&smmu_domain->pgtbl_lock);
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 9345a3f..9755a1b 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c@@ -1038,6 +1038,7 @@ static void arm_smmu_destroy_domain_context(struct iommu_domain *domain) static struct iommu_domain *arm_smmu_domain_alloc(unsigned type) { struct arm_smmu_domain *smmu_domain; + struct iommu_domain_msi_geometry msi_geometry = {0, 0, true}; if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA) return NULL;
@@ -1056,6 +1057,8 @@ static struct iommu_domain *arm_smmu_domain_alloc(unsigned type) return NULL; } + smmu_domain->domain.msi_geometry = msi_geometry; + mutex_init(&smmu_domain->init_mutex); spin_lock_init(&smmu_domain->pgtbl_lock);
--
1.9.1