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Date: Sun, 26 May 2019 18:09:55 +0200 From: Eric Auger <eric.auger@...hat.com> To: eric.auger.pro@...il.com, eric.auger@...hat.com, iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org, kvm@...r.kernel.org, kvmarm@...ts.cs.columbia.edu, joro@...tes.org, alex.williamson@...hat.com, jacob.jun.pan@...ux.intel.com, yi.l.liu@...el.com, jean-philippe.brucker@....com, will.deacon@....com, robin.murphy@....com Cc: kevin.tian@...el.com, ashok.raj@...el.com, marc.zyngier@....com, peter.maydell@...aro.org, vincent.stehle@....com Subject: [PATCH v8 20/29] iommu/smmuv3: Implement bind/unbind_guest_msi The bind/unbind_guest_msi() callbacks check the domain is NESTED and redirect to the dma-iommu implementation. Signed-off-by: Eric Auger <eric.auger@...hat.com> --- v6 -> v7: - remove device handle argument --- drivers/iommu/arm-smmu-v3.c | 43 +++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 2621c3b7cf73..3de07950e89e 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -2528,6 +2528,47 @@ static void arm_smmu_put_resv_regions(struct device *dev, kfree(entry); } +static int +arm_smmu_bind_guest_msi(struct iommu_domain *domain, + dma_addr_t giova, phys_addr_t gpa, size_t size) +{ + struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); + struct arm_smmu_device *smmu; + int ret = -EINVAL; + + mutex_lock(&smmu_domain->init_mutex); + smmu = smmu_domain->smmu; + if (!smmu) + goto out; + + if (smmu_domain->stage != ARM_SMMU_DOMAIN_NESTED) + goto out; + + ret = iommu_dma_bind_guest_msi(domain, giova, gpa, size); +out: + mutex_unlock(&smmu_domain->init_mutex); + return ret; +} + +static void +arm_smmu_unbind_guest_msi(struct iommu_domain *domain, dma_addr_t giova) +{ + struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); + struct arm_smmu_device *smmu; + + mutex_lock(&smmu_domain->init_mutex); + smmu = smmu_domain->smmu; + if (!smmu) + goto unlock; + + if (smmu_domain->stage != ARM_SMMU_DOMAIN_NESTED) + goto unlock; + + iommu_dma_unbind_guest_msi(domain, giova); +unlock: + mutex_unlock(&smmu_domain->init_mutex); +} + static int arm_smmu_attach_pasid_table(struct iommu_domain *domain, struct iommu_pasid_table_config *cfg) { @@ -2701,6 +2742,8 @@ static struct iommu_ops arm_smmu_ops = { .attach_pasid_table = arm_smmu_attach_pasid_table, .detach_pasid_table = arm_smmu_detach_pasid_table, .cache_invalidate = arm_smmu_cache_invalidate, + .bind_guest_msi = arm_smmu_bind_guest_msi, + .unbind_guest_msi = arm_smmu_unbind_guest_msi, .pgsize_bitmap = -1UL, /* Restricted during device attach */ }; -- 2.20.1
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