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Groups > linux.kernel > #1370424
| From | Eric Auger <eric.auger@linaro.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v6 2/7] iommu/arm-smmu: advertise DOMAIN_ATTR_MSI_MAPPING attribute |
| Date | 2016-04-04 10:10 +0200 |
| Message-ID | <rk7Ka-as-21@gated-at.bofh.it> (permalink) |
| References | <rk7Ka-as-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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_MAPPING is set to advertise this requirement on arm-smmu and arm-smmu-v3. Signed-off-by: Eric Auger <eric.auger@linaro.org> Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com> --- 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 | 2 ++ 2 files changed, 4 insertions(+) diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 4ff73ff..a077a35 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -1900,6 +1900,8 @@ 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_MSI_MAPPING: + return 0; default: return -ENODEV; } diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 5158feb..6562752 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1429,6 +1429,8 @@ 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_MSI_MAPPING: + return 0; default: return -ENODEV; } -- 1.9.1
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[PATCH v6 2/7] iommu/arm-smmu: advertise DOMAIN_ATTR_MSI_MAPPING attribute Eric Auger <eric.auger@linaro.org> - 2016-04-04 10:10 +0200
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