From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Auger Subject: [RFC v2 13/20] iommu/smmuv3: Implement bind_guest_msi Date: Tue, 18 Sep 2018 16:24:50 +0200 Message-ID: <20180918142457.3325-14-eric.auger@redhat.com> References: <20180918142457.3325-1-eric.auger@redhat.com> Return-path: In-Reply-To: <20180918142457.3325-1-eric.auger@redhat.com> Sender: linux-kernel-owner@vger.kernel.org To: eric.auger.pro@gmail.com, eric.auger@redhat.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, joro@8bytes.org, alex.williamson@redhat.com, jacob.jun.pan@linux.intel.com, yi.l.liu@linux.intel.com, jean-philippe.brucker@arm.com, will.deacon@arm.com, robin.murphy@arm.com Cc: tianyu.lan@intel.com, ashok.raj@intel.com, marc.zyngier@arm.com, christoffer.dall@arm.com, peter.maydell@linaro.org List-Id: iommu@lists.linux-foundation.org The bind_guest_msi() callback checks the domain is NESTED and redirect to the dma-iommu implementation. Signed-off-by: Eric Auger --- drivers/iommu/arm-smmu-v3.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 4054da756a41..d9d300ab62a5 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -2168,6 +2168,27 @@ static void arm_smmu_put_resv_regions(struct device *dev, kfree(entry); } +static int arm_smmu_bind_guest_msi(struct iommu_domain *domain, + struct iommu_guest_msi_binding *binding) +{ + 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_doorbell(domain, binding); +out: + mutex_unlock(&smmu_domain->init_mutex); + return ret; +} + static int arm_smmu_bind_pasid_table(struct iommu_domain *domain, struct iommu_pasid_table_config *cfg) { @@ -2311,6 +2332,7 @@ static struct iommu_ops arm_smmu_ops = { .bind_pasid_table = arm_smmu_bind_pasid_table, .unbind_pasid_table = arm_smmu_unbind_pasid_table, .cache_invalidate = arm_smmu_cache_invalidate, + .bind_guest_msi = arm_smmu_bind_guest_msi, .pgsize_bitmap = -1UL, /* Restricted during device attach */ }; -- 2.17.1