crosvm/vfio_sys/bindgen.sh
Zihan Chen f5a0980efa vfio_sys: Update bindgen to derive zerocopy
TEST=CQ

BUG=b:204409584

Change-Id: I7ba94cfc1f61b9ef1ed13c1c1d775127ea18649e
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4234070
Commit-Queue: Zihan Chen <zihanchen@google.com>
Reviewed-by: Dennis Kempin <denniskempin@google.com>
2023-02-09 23:07:28 +00:00

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#!/usr/bin/env bash
# Copyright 2022 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Regenerate vfio_sys bindgen bindings.
set -euo pipefail
cd "$(dirname "${BASH_SOURCE[0]}")/.."
source tools/impl/bindgen-common.sh
# VFIO_TYPE is translated as a u8 since it is a char constant, but it needs to be u32 for use in
# ioctl macros.
fix_vfio_type() {
sed -E -e 's/^pub const VFIO_TYPE: u8 = (.*)u8;/pub const VFIO_TYPE: u32 = \1;/'
}
VFIO_EXTRA="// Added by vfio_sys/bindgen.sh
use zerocopy::AsBytes;
use zerocopy::FromBytes;
#[repr(C)]
#[derive(Debug, Default)]
pub struct vfio_region_info_with_cap {
pub region_info: vfio_region_info,
pub cap_info: __IncompleteArrayField<u8>,
}
// vfio_iommu_type1_info_cap_iova_range minus the incomplete iova_ranges
// array, so that Copy/DataInit can be implemented.
#[repr(C)]
#[derive(Debug, Default, Copy, Clone, AsBytes, FromBytes)]
pub struct vfio_iommu_type1_info_cap_iova_range_header {
pub header: vfio_info_cap_header,
pub nr_iovas: u32,
pub reserved: u32,
}"
bindgen_generate \
--raw-line "${VFIO_EXTRA}" \
--allowlist-var='VFIO_.*' \
--blocklist-item='VFIO_DEVICE_API_.*_STRING' \
--allowlist-type='vfio_.*' \
--with-derive-custom "vfio_info_cap_header=FromBytes,AsBytes" \
--with-derive-custom "vfio_iova_range=FromBytes,AsBytes" \
"${BINDGEN_LINUX}/include/uapi/linux/vfio.h" \
-- \
-D__user= \
| replace_linux_int_types | fix_vfio_type \
> vfio_sys/src/vfio.rs