linux-kernel - [PATCH v15 11/12] iommu/smmuv3: Implement bind/unbind_guest

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210411111228.14386-12-eric.auger@redhat.com>
Date:   Sun, 11 Apr 2021 13:12:27 +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, will@...nel.org,
        maz@...nel.org, robin.murphy@....com, joro@...tes.org,
        alex.williamson@...hat.com, tn@...ihalf.com, zhukeqian1@...wei.com
Cc:     jacob.jun.pan@...ux.intel.com, yi.l.liu@...el.com,
        wangxingang5@...wei.com, jean-philippe@...aro.org,
        zhangfei.gao@...aro.org, zhangfei.gao@...il.com,
        vivek.gautam@....com, shameerali.kolothum.thodi@...wei.com,
        yuzenghui@...wei.com, nicoleotsuka@...il.com,
        lushenming@...wei.com, vsethi@...dia.com,
        chenxiang66@...ilicon.com, vdumpa@...dia.com,
        jiangkunkun@...wei.com
Subject: [PATCH v15 11/12] 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/arm-smmu-v3/arm-smmu-v3.c | 43 +++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index ec75219d6a52..3b0a67434f7d 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -2934,6 +2934,47 @@ static void arm_smmu_get_resv_regions(struct device *dev,
 	iommu_dma_get_resv_regions(dev, head);
 }
 
+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)
 {
@@ -3209,6 +3250,8 @@ 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,
 	.dev_has_feat		= arm_smmu_dev_has_feature,
 	.dev_feat_enabled	= arm_smmu_dev_feature_enabled,
 	.dev_enable_feat	= arm_smmu_dev_enable_feature,
-- 
2.26.3