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....@intel.com> Signed-off-by: Yi Sun <yi.y....@linux.intel.com> Signed-off-by: Zhenzhong Duan <zhenzhong.d...@intel.com> --- include/sysemu/iommufd.h | 4 ++++ backends/iommufd.c | 23 ++++++++++++++++++++++- 2 files changed, 26 insertions(+), 1 deletion(-) diff --git a/include/sysemu/iommufd.h b/include/sysemu/iommufd.h index 71c53cbb45..fa1a866237 100644 --- a/include/sysemu/iommufd.h +++ b/include/sysemu/iommufd.h @@ -4,6 +4,7 @@ #include "qom/object.h" #include "exec/hwaddr.h" #include "exec/cpu-common.h" +#include <linux/iommufd.h> #include "sysemu/host_iommu_device.h" #define TYPE_IOMMUFD_BACKEND "iommufd" @@ -34,6 +35,9 @@ 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); +int iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid, + enum iommu_hw_info_type *type, + void *data, uint32_t len, Error **errp); #define TYPE_HIOD_IOMMUFD TYPE_HOST_IOMMU_DEVICE "-iommufd" OBJECT_DECLARE_TYPE(HIODIOMMUFD, HIODIOMMUFDClass, HIOD_IOMMUFD) diff --git a/backends/iommufd.c b/backends/iommufd.c index ef8b3a808b..559affa9ec 100644 --- a/backends/iommufd.c +++ b/backends/iommufd.c @@ -20,7 +20,6 @@ #include "monitor/monitor.h" #include "trace.h" #include <sys/ioctl.h> -#include <linux/iommufd.h> static void iommufd_backend_init(Object *obj) { @@ -212,6 +211,28 @@ int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t ioas_id, return ret; } +int iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid, + enum iommu_hw_info_type *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, + }; + int ret; + + ret = ioctl(be->fd, IOMMU_GET_HW_INFO, &info); + if (ret) { + error_setg_errno(errp, errno, "Failed to get hardware info"); + } else { + *type = info.out_data_type; + } + + return ret; +} + void hiod_iommufd_init(HIODIOMMUFD *idev, IOMMUFDBackend *iommufd, uint32_t devid) { -- 2.34.1