mirror of
https://chromium.googlesource.com/crosvm/crosvm
synced 2024-10-26 05:44:24 +00:00
608938818b
BUG=b:118408510 TEST=manual - build crosvm with/without crosvm-gpu-forward USE flag and run arcvm. Change-Id: Ibb85d52dc679aa8524b29d86148ca28d82d8fe98 Reviewed-on: https://chromium-review.googlesource.com/1347330 Commit-Ready: Lepton Wu <lepton@chromium.org> Tested-by: Lepton Wu <lepton@chromium.org> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Lepton Wu <lepton@chromium.org> Reviewed-by: Zach Reizner <zachr@chromium.org>
63 lines
2.1 KiB
Rust
63 lines
2.1 KiB
Rust
// Copyright 2019 The Chromium OS Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
extern crate sys_util;
|
|
|
|
use sys_util::{GuestAddress, GuestMemory, MemoryMapping};
|
|
|
|
#[link(name = "rendernodehost")]
|
|
extern "C" {
|
|
fn start_render_node_host(
|
|
gpu_host_mem: *mut u8,
|
|
gpu_guest_mem_start: u64,
|
|
gpu_guest_mem_size: u64,
|
|
host_start: *const u8,
|
|
host_4g_start: *const u8,
|
|
);
|
|
}
|
|
|
|
/// The number of bytes in 4 GiB.
|
|
pub const FOUR_GB: u64 = (1 << 32);
|
|
/// The size required for the render node host in host and guest address space.
|
|
pub const RENDER_NODE_HOST_SIZE: u64 = FOUR_GB;
|
|
|
|
/// A render node host device that interfaces with the guest render node forwarder.
|
|
pub struct RenderNodeHost {
|
|
#[allow(dead_code)]
|
|
guest_mem: GuestMemory,
|
|
}
|
|
|
|
impl RenderNodeHost {
|
|
/// Starts the render node host forwarding service over the given guest and host address ranges.
|
|
pub fn start(
|
|
mmap: &MemoryMapping,
|
|
gpu_guest_address: u64,
|
|
guest_mem: GuestMemory,
|
|
) -> RenderNodeHost {
|
|
// Render node forward library need to do address translation between host user space
|
|
// address and guest physical address. We could call Rust function from C library. But
|
|
// since it's actually a linear mapping now, we just pass the host start address to
|
|
// render node forward library. We need two start address here since there would be a
|
|
// hole below 4G if guest memory size is bigger than 4G.
|
|
|
|
let host_start_addr = guest_mem.get_host_address(GuestAddress(0)).unwrap();
|
|
let host_4g_addr = if guest_mem.memory_size() > FOUR_GB {
|
|
guest_mem.get_host_address(GuestAddress(FOUR_GB)).unwrap()
|
|
} else {
|
|
host_start_addr
|
|
};
|
|
// Safe because only valid addresses are given.
|
|
unsafe {
|
|
start_render_node_host(
|
|
mmap.as_ptr(),
|
|
gpu_guest_address,
|
|
mmap.size() as u64,
|
|
host_start_addr,
|
|
host_4g_addr,
|
|
)
|
|
}
|
|
RenderNodeHost { guest_mem }
|
|
}
|
|
}
|