swap: wake the faulting process on conflict

userfaultfd does not wake the thread if zero operation fails with
EEXIST.

minor change: An unexpected page fault event is critical error because
it blocks the faulting thread forever.

BUG=b:215093219
TEST=none

Change-Id: I5326878018f825024c7a5ceaf8daec5792547cb6
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4125076
Commit-Queue: Shin Kawamura <kawasin@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-by: David Stevens <stevensd@chromium.org>
3 files changed
tree: a95f87a785dc47cd0c9298836728898b1179c30c
  1. .cargo/
  2. .devcontainer/
  3. .github/
  4. .vscode/
  5. aarch64/
  6. acpi_tables/
  7. anti_tamper/
  8. arch/
  9. argh_helpers/
  10. base/
  11. bit_field/
  12. broker_ipc/
  13. common/
  14. crash_report/
  15. cros_async/
  16. cros_fdt/
  17. cros_tracing/
  18. crosvm-fuzz/
  19. crosvm_cli/
  20. crosvm_control/
  21. crosvm_plugin/
  22. devices/
  23. disk/
  24. docs/
  25. e2e_tests/
  26. fuse/
  27. gpu_display/
  28. hypervisor/
  29. infra/
  30. io_uring/
  31. kernel_cmdline/
  32. kernel_loader/
  33. kvm/
  34. kvm_sys/
  35. libcras_stub/
  36. linux_input_sys/
  37. logo/
  38. media/
  39. metrics/
  40. net_sys/
  41. net_util/
  42. power_monitor/
  43. prebuilts/
  44. proto_build_tools/
  45. protos/
  46. qcow_utils/
  47. resources/
  48. rutabaga_gfx/
  49. sandbox/
  50. seccomp/
  51. serde_keyvalue/
  52. src/
  53. swap/
  54. system_api/
  55. tests/
  56. third_party/
  57. tools/
  58. tpm2/
  59. tpm2-sys/
  60. tube_transporter/
  61. usb_sys/
  62. usb_util/
  63. vfio_sys/
  64. vhost/
  65. virtio_sys/
  66. vm_control/
  67. vm_memory/
  68. win_audio/
  69. win_util/
  70. x86_64/
  71. .dockerignore
  72. .gitignore
  73. .gitmodules
  74. .rustfmt.toml
  75. ARCHITECTURE.md
  76. build.rs
  77. Cargo.lock
  78. Cargo.toml
  79. CONTRIBUTING.md
  80. DIR_METADATA
  81. LICENSE
  82. mypy.ini
  83. OWNERS
  84. OWNERS_COUNCIL
  85. PRESUBMIT.cfg
  86. pyproject.toml
  87. README.chromeos.md
  88. README.md
  89. rust-toolchain
README.md

crosvm - The ChromeOS Virtual Machine Monitor

crosvm is a virtual machine monitor (VMM) based on Linux’s KVM hypervisor, with a focus on simplicity, security, and speed. crosvm is intended to run Linux guests, originally as a security boundary for running native applications on the ChromeOS platform. Compared to QEMU, crosvm doesn’t emulate architectures or real hardware, instead concentrating on paravirtualized devices, such as the virtio standard.

crosvm is currently used to run Linux/Android guests on ChromeOS devices.

Logo