mirror of
https://chromium.googlesource.com/crosvm/crosvm
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aecf9a4dee
In Rust 2018 edition, `extern crate` is no longer required for importing
from other crates. Instead of writing:
extern crate dep;
use dep::Thing;
we write:
use dep::Thing;
In this approach, macros are imported individually from the declaring
crate rather than through #[macro_use]. Before:
#[macro_use]
extern crate sys_util;
After:
use sys_util::{debug, error};
The only place that `extern crate` continues to be required is in
importing the compiler's proc_macro API into a procedural macro crate.
This will hopefully be fixed in a future Rust release.
extern crate proc_macro;
TEST=cargo check
TEST=cargo check --all-features
TEST=cargo check --target aarch64-unknown-linux-gnu
TEST=local kokoro
Change-Id: I0b43768c0d81f2a250b1959fb97ba35cbac56293
Reviewed-on: https://chromium-review.googlesource.com/1565302
Commit-Ready: David Tolnay <dtolnay@chromium.org>
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: David Tolnay <dtolnay@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: David Tolnay <dtolnay@chromium.org>
61 lines
2.1 KiB
Rust
61 lines
2.1 KiB
Rust
// Copyright 2019 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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use sys_util::{GuestAddress, GuestMemory, MemoryMapping};
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#[link(name = "rendernodehost")]
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extern "C" {
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fn start_render_node_host(
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gpu_host_mem: *mut u8,
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gpu_guest_mem_start: u64,
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gpu_guest_mem_size: u64,
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host_start: *const u8,
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host_4g_start: *const u8,
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);
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}
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/// The number of bytes in 4 GiB.
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pub const FOUR_GB: u64 = (1 << 32);
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/// The size required for the render node host in host and guest address space.
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pub const RENDER_NODE_HOST_SIZE: u64 = FOUR_GB;
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/// A render node host device that interfaces with the guest render node forwarder.
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pub struct RenderNodeHost {
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#[allow(dead_code)]
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guest_mem: GuestMemory,
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}
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impl RenderNodeHost {
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/// Starts the render node host forwarding service over the given guest and host address ranges.
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pub fn start(
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mmap: &MemoryMapping,
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gpu_guest_address: u64,
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guest_mem: GuestMemory,
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) -> RenderNodeHost {
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// Render node forward library need to do address translation between host user space
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// address and guest physical address. We could call Rust function from C library. But
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// since it's actually a linear mapping now, we just pass the host start address to
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// render node forward library. We need two start address here since there would be a
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// hole below 4G if guest memory size is bigger than 4G.
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let host_start_addr = guest_mem.get_host_address(GuestAddress(0)).unwrap();
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let host_4g_addr = if guest_mem.memory_size() > FOUR_GB {
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guest_mem.get_host_address(GuestAddress(FOUR_GB)).unwrap()
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} else {
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host_start_addr
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};
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// Safe because only valid addresses are given.
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unsafe {
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start_render_node_host(
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mmap.as_ptr(),
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gpu_guest_address,
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mmap.size() as u64,
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host_start_addr,
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host_4g_addr,
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)
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}
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RenderNodeHost { guest_mem }
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}
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}
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