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backends/iommufd: Introduce helper function iommufd_backend_get_device_info()

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Introduce a helper function iommufd_backend_get_device_info() to get
host IOMMU related information through iommufd uAPI.

Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhenzhong Duan 2024-06-05 16:30:33 +08:00 committed by Cédric Le Goater
parent d441e05e26
commit 42965386ea
2 changed files with 25 additions and 0 deletions
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22
backends/iommufd.c
View File

@ -208,6 +208,28 @@ int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t ioas_id,
return ret;
}
bool iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid,
uint32_t *type, void *data, uint32_t len,
Error **errp)
{
struct iommu_hw_info info = {
.size = sizeof(info),
.dev_id = devid,
.data_len = len,
.data_uptr = (uintptr_t)data,
};
if (ioctl(be->fd, IOMMU_GET_HW_INFO, &info)) {
error_setg_errno(errp, errno, "Failed to get hardware info");
return false;
}
g_assert(type);
*type = info.out_data_type;
return true;
}
static const TypeInfo types[] = {
{
.name = TYPE_IOMMUFD_BACKEND,

3
include/sysemu/iommufd.h
View File

@ -47,6 +47,9 @@ int iommufd_backend_map_dma(IOMMUFDBackend *be, uint32_t ioas_id, hwaddr iova,
ram_addr_t size, void *vaddr, bool readonly);
int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t ioas_id,
hwaddr iova, ram_addr_t size);
bool iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid,
uint32_t *type, void *data, uint32_t len,
Error **errp);
#define TYPE_HOST_IOMMU_DEVICE_IOMMUFD TYPE_HOST_IOMMU_DEVICE "-iommufd"
#endif