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Subject: [RFC PATCH v2 01/20] backends/iommufd: Introduce
iommufd_backend_alloc_viommu
Date: Tue, 11 Mar 2025 14:10:26 +0000
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Reply-to: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
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From: Nicolin Chen <nicolinc@nvidia.com>
Add a helper to allocate a viommu object.
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
---
backends/iommufd.c | 25 +++++++++++++++++++++++++
backends/trace-events | 1 +
include/system/iommufd.h | 4 ++++
3 files changed, 30 insertions(+)
diff --git a/backends/iommufd.c b/backends/iommufd.c
index 3c23caef96..3fac08c96e 100644
--- a/backends/iommufd.c
+++ b/backends/iommufd.c
@@ -341,6 +341,31 @@ int iommufd_backend_invalidate_cache(IOMMUFDBackend *b=
e, uint32_t hwpt_id,
return ret;
}
=20
+bool iommufd_backend_alloc_viommu(IOMMUFDBackend *be, uint32_t dev_id,
+ uint32_t viommu_type, uint32_t hwpt_id,
+ uint32_t *out_viommu_id, Error **errp)
+{
+ int ret, fd =3D be->fd;
+ struct iommu_viommu_alloc alloc_viommu =3D {
+ .size =3D sizeof(alloc_viommu),
+ .type =3D viommu_type,
+ .dev_id =3D dev_id,
+ .hwpt_id =3D hwpt_id,
+ };
+
+ ret =3D ioctl(fd, IOMMU_VIOMMU_ALLOC, &alloc_viommu);
+
+ trace_iommufd_backend_alloc_viommu(fd, viommu_type, dev_id, hwpt_id,
+ alloc_viommu.out_viommu_id, ret);
+ if (ret) {
+ error_setg_errno(errp, errno, "IOMMU_VIOMMU_ALLOC failed");
+ return false;
+ }
+
+ *out_viommu_id =3D alloc_viommu.out_viommu_id;
+ return true;
+}
+
bool host_iommu_device_iommufd_attach_hwpt(HostIOMMUDeviceIOMMUFD *idev,
uint32_t hwpt_id, Error **errp)
{
diff --git a/backends/trace-events b/backends/trace-events
index 5a23db6c8a..a835827540 100644
--- a/backends/trace-events
+++ b/backends/trace-events
@@ -19,3 +19,4 @@ iommufd_backend_free_id(int iommufd, uint32_t id, int ret=
) " iommufd=3D%d id=3D%d (%
iommufd_backend_set_dirty(int iommufd, uint32_t hwpt_id, bool start, int r=
et) " iommufd=3D%d hwpt=3D%u enable=3D%d (%d)"
iommufd_backend_get_dirty_bitmap(int iommufd, uint32_t hwpt_id, uint64_t i=
ova, uint64_t size, uint64_t page_size, int ret) " iommufd=3D%d hwpt=3D%u i=
ova=3D0x%"PRIx64" size=3D0x%"PRIx64" page_size=3D0x%"PRIx64" (%d)"
iommufd_backend_invalidate_cache(int iommufd, uint32_t hwpt_id, uint32_t d=
ata_type, uint32_t entry_len, uint32_t entry_num, uint32_t done_num, uint64=
_t data_ptr, int ret) " iommufd=3D%d hwpt_id=3D%u data_type=3D%u entry_len=
=3D%u entry_num=3D%u done_num=3D%u data_ptr=3D0x%"PRIx64" (%d)"
+iommufd_backend_alloc_viommu(int iommufd, uint32_t type, uint32_t dev_id, =
uint32_t hwpt_id, uint32_t viommu_id, int ret) " iommufd=3D%d type=3D%u dev=
_id=3D%u hwpt_id=3D%u viommu_id=3D%u (%d)"
diff --git a/include/system/iommufd.h b/include/system/iommufd.h
index b93421ac7c..7e5507f2db 100644
--- a/include/system/iommufd.h
+++ b/include/system/iommufd.h
@@ -55,6 +55,10 @@ bool iommufd_backend_alloc_hwpt(IOMMUFDBackend *be, uint=
32_t dev_id,
uint32_t data_type, uint32_t data_len,
void *data_ptr, uint32_t *out_hwpt,
Error **errp);
+bool iommufd_backend_alloc_viommu(IOMMUFDBackend *be, uint32_t dev_id,
+ uint32_t viommu_type, uint32_t hwpt_id,
+ uint32_t *out_hwpt, Error **errp);
+
bool iommufd_backend_set_dirty_tracking(IOMMUFDBackend *be, uint32_t hwpt_=
id,
bool start, Error **errp);
bool iommufd_backend_get_dirty_bitmap(IOMMUFDBackend *be, uint32_t hwpt_id,
--=20
2.34.1