From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Auger Subject: [PATCH v6 16/22] iommu/smmuv3: Implement bind/unbind_guest_msi Date: Sun, 17 Mar 2019 18:22:26 +0100 Message-ID: <20190317172232.1068-17-eric.auger@redhat.com> References: <20190317172232.1068-1-eric.auger@redhat.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190317172232.1068-1-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: kevin.tian@intel.com, ashok.raj@intel.com, marc.zyngier@arm.com, christoffer.dall@arm.com, peter.maydell@linaro.org, vincent.stehle@arm.com List-Id: iommu@lists.linux-foundation.org The bind/unbind_guest_msi() callbacks check the domain is NESTED and redirect to the dma-iommu implementation. Signed-off-by: Eric Auger --- drivers/iommu/arm-smmu-v3.c | 44 +++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 4a05dd66df74..a4b82c520647 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -2207,6 +2207,48 @@ static void arm_smmu_put_resv_regions(struct device *dev, kfree(entry); } +static int +arm_smmu_bind_guest_msi(struct iommu_domain *domain, struct device *dev, + 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, dev, giova, gpa, size); +out: + mutex_unlock(&smmu_domain->init_mutex); + return ret; +} + +static void +arm_smmu_unbind_guest_msi(struct iommu_domain *domain, + struct device *dev, 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, dev, 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) { @@ -2396,6 +2438,8 @@ 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