This patch adds the VFIO_IOMMU_BIND_MSI ioctl which aims at
passing the guest MSI binding to the host.
Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
---
v1 -> v2:
- s/vfio_iommu_type1_guest_msi_binding/vfio_iommu_type1_bind_guest_msi
---
drivers/vfio/vfio_iommu_type1.c | 31 +++++++++++++++++++++++++++++++
include/uapi/linux/vfio.h | 7 +++++++
2 files changed, 38 insertions(+)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 14529233f774..2ffd46c26dc3 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -1704,6 +1704,24 @@ vfio_cache_invalidate(struct vfio_iommu *iommu,
return ret;
}
+static int
+vfio_iommu_bind_guest_msi(struct vfio_iommu *iommu,
+ struct vfio_iommu_type1_bind_guest_msi *ustruct)
+{
+ struct vfio_domain *d;
+ int ret;
+
+ mutex_lock(&iommu->lock);
+
+ list_for_each_entry(d, &iommu->domain_list, next) {
+ ret = iommu_bind_guest_msi(d->domain, &ustruct->binding);
+ if (ret)
+ break;
+ }
+ mutex_unlock(&iommu->lock);
+ return ret;
+}
+
static int
vfio_bind_pasid_table(struct vfio_iommu *iommu,
struct vfio_iommu_type1_bind_pasid_table *ustruct)
@@ -1818,6 +1836,19 @@ static long vfio_iommu_type1_ioctl(void *iommu_data,
return -EINVAL;
return vfio_cache_invalidate(iommu, &ustruct);
+ } else if (cmd == VFIO_IOMMU_BIND_MSI) {
+ struct vfio_iommu_type1_bind_guest_msi ustruct;
+
+ minsz = offsetofend(struct vfio_iommu_type1_bind_guest_msi,
+ binding);
+
+ if (copy_from_user(&ustruct, (void __user *)arg, minsz))
+ return -EFAULT;
+
+ if (ustruct.argsz < minsz || ustruct.flags)
+ return -EINVAL;
+
+ return vfio_iommu_bind_guest_msi(iommu, &ustruct);
}
return -ENOTTY;
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 2a38d0bca0ca..6fb5e944e73c 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -680,6 +680,13 @@ struct vfio_iommu_type1_cache_invalidate {
};
#define VFIO_IOMMU_CACHE_INVALIDATE _IO(VFIO_TYPE, VFIO_BASE + 23)
+struct vfio_iommu_type1_bind_guest_msi {
+ __u32 argsz;
+ __u32 flags;
+ struct iommu_guest_msi_binding binding;
+};
+#define VFIO_IOMMU_BIND_MSI _IO(VFIO_TYPE, VFIO_BASE + 24)
+
/* -------- Additional API for SPAPR TCE (Server POWERPC) IOMMU -------- */
/*
--
2.17.1
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