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android / platform / external / crosvm / b969ded8a
commitb969ded8a5c579394b2c34a3fd920da92534eb1d[log] [tgz]
authorZhaoLiu <zhao1.liu@intel.corp-partner.google.com>Tue Apr 05 20:48:12 2022 +0800
committerChromeos LUCI <chromeos-scoped@luci-project-accounts.iam.gserviceaccount.com>Mon Apr 25 07:50:55 2022 +0000
tree1628cbc831e12eb34a7c49080823cd896a94df2b
parente93b16cefccc3dcd69b9722e2483037586192688 [diff]
crosvm: Support MSR emulation

At present, crosvm can support handle RDMSR in userspace by read MSR of
Host directly. This is the RDMSR passthrough in userpace.

This patch adds more MSR handler support, including:
- WRMSR passthrough: write the corresponding MSR of Host directly in
  userspace; The control of MSR will work on host;
- RDMSR emulation: crosvm uses a dummy MSR value to let Guest reads on.
  This value can be different with real MSR of Host;
- WRMSR emulation: crosvm uses a dummy MSR value to let Guest writes
  into. This means the control of MSR won't really work (on Host).

BUG=b:225375705
TEST=Set `--userspace-msr=0x1a2,type=r,action=pass,from=cpu0`

Change-Id: I3276dd651464ef7b695e2ddd433793d59128af9b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3575508
Reviewed-by: Junichi Uekawa <uekawa@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Junichi Uekawa <uekawa@chromium.org>
9 files changed
tree: 1628cbc831e12eb34a7c49080823cd896a94df2b
  1. .cargo/
  2. .devcontainer/
  3. .github/
  4. aarch64/
  5. acpi_tables/
  6. arch/
  7. base/
  8. bin/
  9. bit_field/
  10. ci/
  11. common/
  12. cros_async/
  13. crosvm-fuzz/
  14. crosvm_control/
  15. crosvm_plugin/
  16. devices/
  17. disk/
  18. docs/
  19. fuse/
  20. gpu_display/
  21. hypervisor/
  22. infra/
  23. integration_tests/
  24. io_uring/
  25. kernel_cmdline/
  26. kernel_loader/
  27. kvm/
  28. kvm_sys/
  29. libcras_stub/
  30. linux_input_sys/
  31. logo/
  32. media/
  33. net_sys/
  34. net_util/
  35. power_monitor/
  36. protos/
  37. qcow_utils/
  38. resources/
  39. rutabaga_gfx/
  40. seccomp/
  41. serde_keyvalue/
  42. src/
  43. system_api_stub/
  44. tests/
  45. third_party/
  46. tools/
  47. tpm2/
  48. tpm2-sys/
  49. tube_transporter/
  50. usb_sys/
  51. usb_util/
  52. vfio_sys/
  53. vhost/
  54. virtio_sys/
  55. vm_control/
  56. vm_memory/
  57. win_util/
  58. x86_64/
  59. .dockerignore
  60. .gitignore
  61. .gitmodules
  62. .rustfmt.toml
  63. ARCHITECTURE.md
  64. Cargo.toml
  65. CONTRIBUTING.md
  66. LICENSE
  67. navbar.md
  68. OWNERS
  69. README.chromeos.md
  70. README.md
  71. run_tests
  72. rust-toolchain
  73. setup_cros_cargo.sh
  74. test_all
  75. unblocked_terms.txt
README.md

crosvm - The Chrome OS 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 Chrome OS 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 Chrome OS devices.

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