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| author | Zhenzhong Duan <zhenzhong.duan@intel.com> | 2024-06-05 16:30:33 +0800 |
|---|---|---|
| committer | Cédric Le Goater <clg@redhat.com> | 2024-06-24 23:15:30 +0200 |
| commit | 42965386ea21fe375a5a2a6d85261663576d86d9 (patch) | |
| tree | 4f31c83e801eea2fa408639ebbb3a7616b2819b8 | |
| parent | d441e05e26033eb0e49c4185293424a480ef750f (diff) | |
| download | qemu-42965386ea21fe375a5a2a6d85261663576d86d9.zip qemu-42965386ea21fe375a5a2a6d85261663576d86d9.tar.gz qemu-42965386ea21fe375a5a2a6d85261663576d86d9.tar.bz2 | |
backends/iommufd: Introduce helper function iommufd_backend_get_device_info()
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>
| -rw-r--r-- | backends/iommufd.c | 22 | ||||
| -rw-r--r-- | include/sysemu/iommufd.h | 3 |
2 files changed, 25 insertions, 0 deletions
diff --git a/backends/iommufd.c b/backends/iommufd.c index 012f18d..c7e969d 100644 --- a/backends/iommufd.c +++ b/backends/iommufd.c @@ -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, diff --git a/include/sysemu/iommufd.h b/include/sysemu/iommufd.h index f6e6d6e..9edfec6 100644 --- a/include/sysemu/iommufd.h +++ b/include/sysemu/iommufd.h @@ -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 |