diff --git a/libc/kernel/uapi/linux/iommufd.h b/libc/kernel/uapi/linux/iommufd.h
new file mode 100644
index 0000000..b7f5815
--- /dev/null
+++ b/libc/kernel/uapi/linux/iommufd.h
@@ -0,0 +1,129 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _UAPI_IOMMUFD_H
+#define _UAPI_IOMMUFD_H
+#include <linux/types.h>
+#include <linux/ioctl.h>
+#define IOMMUFD_TYPE (';')
+enum {
+  IOMMUFD_CMD_BASE = 0x80,
+  IOMMUFD_CMD_DESTROY = IOMMUFD_CMD_BASE,
+  IOMMUFD_CMD_IOAS_ALLOC,
+  IOMMUFD_CMD_IOAS_ALLOW_IOVAS,
+  IOMMUFD_CMD_IOAS_COPY,
+  IOMMUFD_CMD_IOAS_IOVA_RANGES,
+  IOMMUFD_CMD_IOAS_MAP,
+  IOMMUFD_CMD_IOAS_UNMAP,
+  IOMMUFD_CMD_OPTION,
+  IOMMUFD_CMD_VFIO_IOAS,
+};
+struct iommu_destroy {
+  __u32 size;
+  __u32 id;
+};
+#define IOMMU_DESTROY _IO(IOMMUFD_TYPE, IOMMUFD_CMD_DESTROY)
+struct iommu_ioas_alloc {
+  __u32 size;
+  __u32 flags;
+  __u32 out_ioas_id;
+};
+#define IOMMU_IOAS_ALLOC _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_ALLOC)
+struct iommu_iova_range {
+  __aligned_u64 start;
+  __aligned_u64 last;
+};
+struct iommu_ioas_iova_ranges {
+  __u32 size;
+  __u32 ioas_id;
+  __u32 num_iovas;
+  __u32 __reserved;
+  __aligned_u64 allowed_iovas;
+  __aligned_u64 out_iova_alignment;
+};
+#define IOMMU_IOAS_IOVA_RANGES _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_IOVA_RANGES)
+struct iommu_ioas_allow_iovas {
+  __u32 size;
+  __u32 ioas_id;
+  __u32 num_iovas;
+  __u32 __reserved;
+  __aligned_u64 allowed_iovas;
+};
+#define IOMMU_IOAS_ALLOW_IOVAS _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_ALLOW_IOVAS)
+enum iommufd_ioas_map_flags {
+  IOMMU_IOAS_MAP_FIXED_IOVA = 1 << 0,
+  IOMMU_IOAS_MAP_WRITEABLE = 1 << 1,
+  IOMMU_IOAS_MAP_READABLE = 1 << 2,
+};
+struct iommu_ioas_map {
+  __u32 size;
+  __u32 flags;
+  __u32 ioas_id;
+  __u32 __reserved;
+  __aligned_u64 user_va;
+  __aligned_u64 length;
+  __aligned_u64 iova;
+};
+#define IOMMU_IOAS_MAP _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_MAP)
+struct iommu_ioas_copy {
+  __u32 size;
+  __u32 flags;
+  __u32 dst_ioas_id;
+  __u32 src_ioas_id;
+  __aligned_u64 length;
+  __aligned_u64 dst_iova;
+  __aligned_u64 src_iova;
+};
+#define IOMMU_IOAS_COPY _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_COPY)
+struct iommu_ioas_unmap {
+  __u32 size;
+  __u32 ioas_id;
+  __aligned_u64 iova;
+  __aligned_u64 length;
+};
+#define IOMMU_IOAS_UNMAP _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_UNMAP)
+enum iommufd_option {
+  IOMMU_OPTION_RLIMIT_MODE = 0,
+  IOMMU_OPTION_HUGE_PAGES = 1,
+};
+enum iommufd_option_ops {
+  IOMMU_OPTION_OP_SET = 0,
+  IOMMU_OPTION_OP_GET = 1,
+};
+struct iommu_option {
+  __u32 size;
+  __u32 option_id;
+  __u16 op;
+  __u16 __reserved;
+  __u32 object_id;
+  __aligned_u64 val64;
+};
+#define IOMMU_OPTION _IO(IOMMUFD_TYPE, IOMMUFD_CMD_OPTION)
+enum iommufd_vfio_ioas_op {
+  IOMMU_VFIO_IOAS_GET = 0,
+  IOMMU_VFIO_IOAS_SET = 1,
+  IOMMU_VFIO_IOAS_CLEAR = 2,
+};
+struct iommu_vfio_ioas {
+  __u32 size;
+  __u32 ioas_id;
+  __u16 op;
+  __u16 __reserved;
+};
+#define IOMMU_VFIO_IOAS _IO(IOMMUFD_TYPE, IOMMUFD_CMD_VFIO_IOAS)
+#endif