mirror of
https://chromium.googlesource.com/crosvm/crosvm
synced 2025-02-10 12:09:31 +00:00
fc88a6091d
Handling page faults using userfaultfd for all the time after vmm-swap is enabled originally has overhead. By disabling swapping, we can use crosvm without the overhead when the crosvm become used heavily again. This also refactor PageHandler and extract register logic to lib.rs. BUG=b:215093219 TEST=cargo test -p swap Change-Id: Id81d84ebe40067b4f19b212f6b81cbaf249c0c3c Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4005474 Reviewed-by: David Stevens <stevensd@chromium.org> Commit-Queue: Shin Kawamura <kawasin@google.com>
38 lines
1,009 B
Rust
38 lines
1,009 B
Rust
// Copyright 2022 The ChromiumOS Authors
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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 base::MemoryMapping;
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use base::MemoryMappingBuilder;
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use base::SharedMemory;
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use data_model::VolatileMemory;
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use swap::userfaultfd::Userfaultfd;
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use userfaultfd::UffdBuilder;
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pub fn create_uffd_for_test() -> Userfaultfd {
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UffdBuilder::new()
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.non_blocking(false)
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.create()
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.unwrap()
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.into()
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}
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pub struct SharedMemoryMapping {
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pub shm: SharedMemory,
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pub mmap: MemoryMapping,
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}
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impl SharedMemoryMapping {
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pub fn base_addr(&self) -> usize {
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self.mmap.get_ref::<u8>(0).unwrap().as_mut_ptr() as usize
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}
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}
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pub fn create_shared_memory(name: &str, size: usize) -> SharedMemoryMapping {
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let shm = SharedMemory::new(name, size as u64).unwrap();
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let mmap = MemoryMappingBuilder::new(size)
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.from_shared_memory(&shm)
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.build()
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.unwrap();
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SharedMemoryMapping { shm, mmap }
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}
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