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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 16:52:07 +0200 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 16:52:17 +0200 |
| commit | 9260319e7411ff8281700a532caa436f40120ec4 (patch) | |
| tree | 2f6bfe5f3458dd49d328d3a9eb508595450adec0 /gitlab/issues/target_missing/host_missing/accel_missing/2167.toml | |
| parent | 225caa38269323af1bfc2daadff5ec8bd930747f (diff) | |
| download | emulator-bug-study-9260319e7411ff8281700a532caa436f40120ec4.tar.gz emulator-bug-study-9260319e7411ff8281700a532caa436f40120ec4.zip | |
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Diffstat (limited to 'gitlab/issues/target_missing/host_missing/accel_missing/2167.toml')
| -rw-r--r-- | gitlab/issues/target_missing/host_missing/accel_missing/2167.toml | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/gitlab/issues/target_missing/host_missing/accel_missing/2167.toml b/gitlab/issues/target_missing/host_missing/accel_missing/2167.toml deleted file mode 100644 index d1edbc3e..00000000 --- a/gitlab/issues/target_missing/host_missing/accel_missing/2167.toml +++ /dev/null @@ -1,48 +0,0 @@ -id = 2167 -title = "The GPIO controllers connected to the emulated PCIe bus via vhost-user can't generate interrupts." -state = "opened" -created_at = "2024-02-14T19:51:20.667Z" -closed_at = "n/a" -labels = ["device:virtio", "workflow::Patch available"] -url = "https://gitlab.com/qemu-project/qemu/-/issues/2167" -host-os = "Debian/testing Linux" -host-arch = "x86" -qemu-version = "8.1.1" -guest-os = "Linux (built with Buildroot,based on qemu_aarch64_virt_defconfig)" -guest-arch = "Aarch64" -description = """The problem is related to emulation of GPIO controllers using the vhost-user protocol for GPIO. The problem was detected when using the [vhost-device-gpio](https://github.com/rust-vmm/vhost-device) software. I have described the whole issue in https://github.com/rust-vmm/vhost-device/issues/613 , but it is QEMU related, and therefore I describe it here as well. -The broader context is described in https://stackoverflow.com/questions/75906208/how-to-connect-via-virtio-gui-running-on-host-with-gpio-in-a-qemu-emulated-virtu .""" -reproduce = """1. For Debian/testing you need to compile a libgpiod-2.1.1 (I assume that the following is done in the home directory directory of the `dev` user: `/home/dev`): - - ``` - wget https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/snapshot/libgpiod-2.1.tar.gz ; \\ - tar -xzf libgpiod-2.1.tar.gz ; \\ - cd libgpiod-2.1 ; \\ - autoupdate ; \\ - ./autogen.sh ; \\ - make - ``` - 2. Download the vhost-device-gpio (`git clone https://github.com/rust-vmm/vhost-device.git`) - 3. Build the vhost-device-gpio (in the `vhost-device-gpio` subdirectory) - - ``` - export PATH_TO_LIBGPIOD=/home/dev/libgpiod-2.1 - export SYSTEM_DEPS_LIBGPIOD_NO_PKG_CONFIG=1 - export SYSTEM_DEPS_LIBGPIOD_SEARCH_NATIVE="${PATH_TO_LIBGPIOD}/lib/.libs/" - export SYSTEM_DEPS_LIBGPIOD_LIB=gpiod - export SYSTEM_DEPS_LIBGPIOD_INCLUDE="${PATH_TO_LIBGPIOD}/include/" - cargo build --features "mock_gpio" - ``` - 4. Start vhost-device-gpio: (`LD_LIBRARY_PATH=/home/emb/libgpiod-2.1/lib/.libs/ ./vhost-device-gpio -s /tmp/gpio.sock -l s4`) - 5. Download the Buildroot 2023.11.1 (`wget https://buildroot.org/downloads/buildroot-2023.11.1.tar.xz` in another directory) and unpack it. Buildroot and the main directory of Buildroot tree are denoted by BR if the following description. - 6. Configure BR (run `make qemu_aarch64_virt_defconfig` in the main BR directory, run `make menuconfig` and select external toolchain, `BR2_PACKAGE_LIBGPIOD=y`, `BR2_PACKAGE_LIBGPIOD_TOOLS=y`, run `make linux-menuconfig` and select `CONFIG_GPIO_VIRTIO=m` in the kernel configuration) - 7. Build the Linux and QEMU (run `make` in the BR directory). - 8. Run the emulation in BR/output/images, using the command line given above. - 9. After the virtual machine starts, log in as root and load the driver: `modprobe gpio-virtio` -10. Try to monitor changes of one of the emulated pins: `gpiomon 0 0` -11. You'll get the error message: - - ``` - gpiomon: error waiting for events: No such device - ```""" -additional = """[0009-enable-F-IRQ-in-virtio-pci.patch](/uploads/39bc04b2d94063ccd539c5cfbc9cd105/0009-enable-F-IRQ-in-virtio-pci.patch)""" |