lkml.org 
[lkml]   [2019]   [Mar]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v5 16/22] iommu/smmuv3: Implement bind/unbind_guest_msi
Date
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@redhat.com>
---
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
\
 
 \ /
  Last update: 2019-03-15 17:12    [W:0.088 / U:21.364 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site