From: Eric Auger <eric.auger@redhat.com>
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@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,
peter.maydell@linaro.org, vincent.stehle@arm.com
Subject: [PATCH v8 18/29] iommu/smmuv3: Nested mode single MSI doorbell per domain enforcement
Date: Sun, 26 May 2019 18:09:53 +0200 [thread overview]
Message-ID: <20190526161004.25232-19-eric.auger@redhat.com> (raw)
In-Reply-To: <20190526161004.25232-1-eric.auger@redhat.com>
In nested mode we enforce the rule that all devices belonging
to the same iommu_domain share the same msi_domain.
Indeed if there were several physical MSI doorbells being used
within a single iommu_domain, it becomes really difficult to
resolve the nested stage mapping translating into the correct
physical doorbell. So let's forbid this situation.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
drivers/iommu/arm-smmu-v3.c | 41 +++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index b4813f23f302..31d8028bb997 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -2048,6 +2048,37 @@ static void arm_smmu_detach_dev(struct arm_smmu_master *master)
arm_smmu_disable_ats(master);
}
+static bool arm_smmu_share_msi_domain(struct iommu_domain *domain,
+ struct device *dev)
+{
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
+ struct irq_domain *irqd = dev_get_msi_domain(dev);
+ struct arm_smmu_master *master;
+ unsigned long flags;
+ bool share = false;
+
+ if (!irqd)
+ return true;
+
+ spin_lock_irqsave(&smmu_domain->devices_lock, flags);
+ list_for_each_entry(master, &smmu_domain->devices, domain_head) {
+ struct irq_domain *d = dev_get_msi_domain(master->dev);
+
+ if (!d)
+ continue;
+ if (irqd != d) {
+ dev_info(dev, "Nested mode forbids to attach devices "
+ "using different physical MSI doorbells "
+ "to the same iommu_domain");
+ goto unlock;
+ }
+ }
+ share = true;
+unlock:
+ spin_unlock_irqrestore(&smmu_domain->devices_lock, flags);
+ return share;
+}
+
static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
{
int ret = 0;
@@ -2082,6 +2113,16 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
ret = -ENXIO;
goto out_unlock;
}
+ /*
+ * In nested mode we must check all devices belonging to the
+ * domain share the same physical MSI doorbell. Otherwise nested
+ * stage MSI binding is not supported.
+ */
+ if (smmu_domain->stage == ARM_SMMU_DOMAIN_NESTED &&
+ !arm_smmu_share_msi_domain(domain, dev)) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
master->domain = smmu_domain;
--
2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Eric Auger <eric.auger@redhat.com>
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@intel.com,
jean-philippe.brucker@arm.com, will.deacon@arm.com,
robin.murphy@arm.com
Cc: marc.zyngier@arm.com, peter.maydell@linaro.org,
kevin.tian@intel.com, vincent.stehle@arm.com,
ashok.raj@intel.com
Subject: [PATCH v8 18/29] iommu/smmuv3: Nested mode single MSI doorbell per domain enforcement
Date: Sun, 26 May 2019 18:09:53 +0200 [thread overview]
Message-ID: <20190526161004.25232-19-eric.auger@redhat.com> (raw)
In-Reply-To: <20190526161004.25232-1-eric.auger@redhat.com>
In nested mode we enforce the rule that all devices belonging
to the same iommu_domain share the same msi_domain.
Indeed if there were several physical MSI doorbells being used
within a single iommu_domain, it becomes really difficult to
resolve the nested stage mapping translating into the correct
physical doorbell. So let's forbid this situation.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
drivers/iommu/arm-smmu-v3.c | 41 +++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index b4813f23f302..31d8028bb997 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -2048,6 +2048,37 @@ static void arm_smmu_detach_dev(struct arm_smmu_master *master)
arm_smmu_disable_ats(master);
}
+static bool arm_smmu_share_msi_domain(struct iommu_domain *domain,
+ struct device *dev)
+{
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
+ struct irq_domain *irqd = dev_get_msi_domain(dev);
+ struct arm_smmu_master *master;
+ unsigned long flags;
+ bool share = false;
+
+ if (!irqd)
+ return true;
+
+ spin_lock_irqsave(&smmu_domain->devices_lock, flags);
+ list_for_each_entry(master, &smmu_domain->devices, domain_head) {
+ struct irq_domain *d = dev_get_msi_domain(master->dev);
+
+ if (!d)
+ continue;
+ if (irqd != d) {
+ dev_info(dev, "Nested mode forbids to attach devices "
+ "using different physical MSI doorbells "
+ "to the same iommu_domain");
+ goto unlock;
+ }
+ }
+ share = true;
+unlock:
+ spin_unlock_irqrestore(&smmu_domain->devices_lock, flags);
+ return share;
+}
+
static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
{
int ret = 0;
@@ -2082,6 +2113,16 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
ret = -ENXIO;
goto out_unlock;
}
+ /*
+ * In nested mode we must check all devices belonging to the
+ * domain share the same physical MSI doorbell. Otherwise nested
+ * stage MSI binding is not supported.
+ */
+ if (smmu_domain->stage == ARM_SMMU_DOMAIN_NESTED &&
+ !arm_smmu_share_msi_domain(domain, dev)) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
master->domain = smmu_domain;
--
2.20.1
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
WARNING: multiple messages have this Message-ID (diff)
From: Eric Auger <eric.auger@redhat.com>
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@intel.com,
jean-philippe.brucker@arm.com, will.deacon@arm.com,
robin.murphy@arm.com
Cc: marc.zyngier@arm.com, kevin.tian@intel.com,
vincent.stehle@arm.com, ashok.raj@intel.com
Subject: [PATCH v8 18/29] iommu/smmuv3: Nested mode single MSI doorbell per domain enforcement
Date: Sun, 26 May 2019 18:09:53 +0200 [thread overview]
Message-ID: <20190526161004.25232-19-eric.auger@redhat.com> (raw)
In-Reply-To: <20190526161004.25232-1-eric.auger@redhat.com>
In nested mode we enforce the rule that all devices belonging
to the same iommu_domain share the same msi_domain.
Indeed if there were several physical MSI doorbells being used
within a single iommu_domain, it becomes really difficult to
resolve the nested stage mapping translating into the correct
physical doorbell. So let's forbid this situation.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
drivers/iommu/arm-smmu-v3.c | 41 +++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index b4813f23f302..31d8028bb997 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -2048,6 +2048,37 @@ static void arm_smmu_detach_dev(struct arm_smmu_master *master)
arm_smmu_disable_ats(master);
}
+static bool arm_smmu_share_msi_domain(struct iommu_domain *domain,
+ struct device *dev)
+{
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
+ struct irq_domain *irqd = dev_get_msi_domain(dev);
+ struct arm_smmu_master *master;
+ unsigned long flags;
+ bool share = false;
+
+ if (!irqd)
+ return true;
+
+ spin_lock_irqsave(&smmu_domain->devices_lock, flags);
+ list_for_each_entry(master, &smmu_domain->devices, domain_head) {
+ struct irq_domain *d = dev_get_msi_domain(master->dev);
+
+ if (!d)
+ continue;
+ if (irqd != d) {
+ dev_info(dev, "Nested mode forbids to attach devices "
+ "using different physical MSI doorbells "
+ "to the same iommu_domain");
+ goto unlock;
+ }
+ }
+ share = true;
+unlock:
+ spin_unlock_irqrestore(&smmu_domain->devices_lock, flags);
+ return share;
+}
+
static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
{
int ret = 0;
@@ -2082,6 +2113,16 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
ret = -ENXIO;
goto out_unlock;
}
+ /*
+ * In nested mode we must check all devices belonging to the
+ * domain share the same physical MSI doorbell. Otherwise nested
+ * stage MSI binding is not supported.
+ */
+ if (smmu_domain->stage == ARM_SMMU_DOMAIN_NESTED &&
+ !arm_smmu_share_msi_domain(domain, dev)) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
master->domain = smmu_domain;
--
2.20.1
_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
next prev parent reply other threads:[~2019-05-26 16:12 UTC|newest]
Thread overview: 192+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-26 16:09 [PATCH v8 00/29] SMMUv3 Nested Stage Setup Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 01/29] driver core: Add per device iommu param Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 02/29] iommu: Introduce device fault data Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 03/29] iommu: Introduce device fault report API Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 04/29] iommu: Add recoverable fault reporting Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-06-03 22:31 ` Alex Williamson
2019-06-03 22:31 ` Alex Williamson
2019-06-03 22:31 ` Alex Williamson
2019-06-04 15:48 ` Jacob Pan
2019-06-04 15:48 ` Jacob Pan
2019-06-04 15:48 ` Jacob Pan
2019-05-26 16:09 ` [PATCH v8 05/29] iommu: Add a timeout parameter for PRQ response Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-06-03 22:32 ` Alex Williamson
2019-06-03 22:32 ` Alex Williamson
2019-06-03 22:32 ` Alex Williamson
2019-06-04 10:52 ` Jean-Philippe Brucker
2019-06-04 10:52 ` Jean-Philippe Brucker
2019-06-04 10:52 ` Jean-Philippe Brucker
2019-06-04 15:50 ` Jacob Pan
2019-06-04 15:50 ` Jacob Pan
2019-06-04 15:50 ` Jacob Pan
2019-05-26 16:09 ` [PATCH v8 06/29] trace/iommu: Add sva trace events Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 07/29] iommu: Use device fault trace event Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 08/29] iommu: Introduce attach/detach_pasid_table API Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 09/29] iommu: Introduce cache_invalidate API Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 10/29] iommu: Introduce bind/unbind_guest_msi Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 11/29] iommu/arm-smmu-v3: Maintain a SID->device structure Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 12/29] iommu/smmuv3: Dynamically allocate s1_cfg and s2_cfg Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 13/29] iommu/smmuv3: Get prepared for nested stage support Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 14/29] iommu/smmuv3: Implement attach/detach_pasid_table Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 15/29] iommu/smmuv3: Introduce __arm_smmu_tlb_inv_asid/s1_range_nosync Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 16/29] iommu/smmuv3: Implement cache_invalidate Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 17/29] dma-iommu: Implement NESTED_MSI cookie Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger [this message]
2019-05-26 16:09 ` [PATCH v8 18/29] iommu/smmuv3: Nested mode single MSI doorbell per domain enforcement Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 19/29] iommu/smmuv3: Enforce incompatibility between nested mode and HW MSI regions Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 20/29] iommu/smmuv3: Implement bind/unbind_guest_msi Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 21/29] iommu/smmuv3: Report non recoverable faults Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` [PATCH v8 22/29] vfio: VFIO_IOMMU_ATTACH/DETACH_PASID_TABLE Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-06-03 22:32 ` Alex Williamson
2019-06-03 22:32 ` Alex Williamson
2019-06-03 22:32 ` Alex Williamson
2019-05-26 16:09 ` [PATCH v8 23/29] vfio: VFIO_IOMMU_CACHE_INVALIDATE Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-06-14 12:38 ` Liu, Yi L
2019-06-14 12:38 ` Liu, Yi L
2019-06-14 12:38 ` Liu, Yi L
2019-06-14 13:17 ` Auger Eric
2019-06-14 13:17 ` Auger Eric
2019-06-14 13:17 ` Auger Eric
2019-05-26 16:09 ` [PATCH v8 24/29] vfio: VFIO_IOMMU_BIND/UNBIND_MSI Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-05-26 16:09 ` Eric Auger
2019-06-03 22:32 ` Alex Williamson
2019-06-03 22:32 ` Alex Williamson
2019-06-03 22:32 ` Alex Williamson
2019-06-07 8:30 ` Auger Eric
2019-06-07 8:30 ` Auger Eric
2019-06-07 8:30 ` Auger Eric
2019-05-26 16:10 ` [PATCH v8 25/29] vfio-pci: Add a new VFIO_REGION_TYPE_NESTED region type Eric Auger
2019-05-26 16:10 ` Eric Auger
2019-05-26 16:10 ` Eric Auger
2019-06-03 22:31 ` Alex Williamson
2019-06-03 22:31 ` Alex Williamson
2019-06-03 22:31 ` Alex Williamson
2019-06-07 8:28 ` Auger Eric
2019-06-07 8:28 ` Auger Eric
2019-06-07 8:28 ` Auger Eric
2019-06-07 12:47 ` Jean-Philippe Brucker
2019-06-07 12:47 ` Jean-Philippe Brucker
2019-06-07 12:47 ` Jean-Philippe Brucker
2019-06-07 16:29 ` Alex Williamson
2019-06-07 16:29 ` Alex Williamson
2019-06-07 16:29 ` Alex Williamson
2019-05-26 16:10 ` [PATCH v8 26/29] vfio-pci: Register an iommu fault handler Eric Auger
2019-05-26 16:10 ` Eric Auger
2019-05-26 16:10 ` Eric Auger
2019-06-03 22:31 ` Alex Williamson
2019-06-03 22:31 ` Alex Williamson
2019-06-03 22:31 ` Alex Williamson
2019-06-04 16:11 ` Auger Eric
2019-06-04 16:11 ` Auger Eric
2019-06-04 16:11 ` Auger Eric
2019-06-05 22:45 ` Jacob Pan
2019-06-05 22:45 ` Jacob Pan
2019-06-05 22:45 ` Jacob Pan
2019-06-06 18:54 ` Jean-Philippe Brucker
2019-06-06 18:54 ` Jean-Philippe Brucker
2019-06-06 18:54 ` Jean-Philippe Brucker
2019-06-06 20:29 ` Jacob Pan
2019-06-06 20:29 ` Jacob Pan
2019-06-06 20:29 ` Jacob Pan
2019-06-07 7:02 ` Auger Eric
2019-06-07 7:02 ` Auger Eric
2019-06-07 7:02 ` Auger Eric
2019-06-07 10:28 ` Jean-Philippe Brucker
2019-06-07 10:28 ` Jean-Philippe Brucker
2019-06-07 10:28 ` Jean-Philippe Brucker
2019-06-07 17:43 ` Jacob Pan
2019-06-07 17:43 ` Jacob Pan
2019-06-07 17:43 ` Jacob Pan
2019-06-10 12:45 ` Jean-Philippe Brucker
2019-06-10 12:45 ` Jean-Philippe Brucker
2019-06-10 12:45 ` Jean-Philippe Brucker
2019-06-10 21:31 ` Jacob Pan
2019-06-10 21:31 ` Jacob Pan
2019-06-10 21:31 ` Jacob Pan
2019-06-11 13:14 ` Jean-Philippe Brucker
2019-06-11 13:14 ` Jean-Philippe Brucker
2019-06-11 13:14 ` Jean-Philippe Brucker
2019-06-12 18:53 ` Jacob Pan
2019-06-12 18:53 ` Jacob Pan
2019-06-12 18:53 ` Jacob Pan
2019-06-18 14:04 ` Jean-Philippe Brucker
2019-06-18 14:04 ` Jean-Philippe Brucker
2019-06-18 14:04 ` Jean-Philippe Brucker
2019-06-19 0:19 ` Jacob Pan
2019-06-19 0:19 ` Jacob Pan
2019-06-19 0:19 ` Jacob Pan
2019-06-19 11:44 ` Jean-Philippe Brucker
2019-06-19 11:44 ` Jean-Philippe Brucker
2019-06-19 11:44 ` Jean-Philippe Brucker
2019-07-11 13:07 ` Auger Eric
2019-07-11 13:07 ` Auger Eric
2019-07-11 13:07 ` Auger Eric
2019-06-07 12:48 ` Jean-Philippe Brucker
2019-06-07 12:48 ` Jean-Philippe Brucker
2019-06-07 12:48 ` Jean-Philippe Brucker
2019-06-07 14:18 ` Auger Eric
2019-06-07 14:18 ` Auger Eric
2019-06-07 14:18 ` Auger Eric
2019-05-26 16:10 ` [PATCH v8 27/29] vfio_pci: Allow to mmap the fault queue Eric Auger
2019-05-26 16:10 ` Eric Auger
2019-05-26 16:10 ` Eric Auger
2019-05-26 16:10 ` [PATCH v8 28/29] vfio-pci: Add VFIO_PCI_DMA_FAULT_IRQ_INDEX Eric Auger
2019-05-26 16:10 ` Eric Auger
2019-05-26 16:10 ` Eric Auger
2019-06-03 22:31 ` Alex Williamson
2019-06-03 22:31 ` Alex Williamson
2019-06-03 22:31 ` Alex Williamson
2019-06-04 16:11 ` Auger Eric
2019-06-04 16:11 ` Auger Eric
2019-06-04 16:11 ` Auger Eric
2019-05-26 16:10 ` [PATCH v8 29/29] vfio: Document nested stage control Eric Auger
2019-05-26 16:10 ` Eric Auger
2019-05-26 16:10 ` Eric Auger
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