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GPIO proxy drivers ready for passthrough testing in VM using systemd #552
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Commits on Apr 3, 2024
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Commits on Apr 9, 2024
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GPIO proxy drivers in host and guest VM, selftesting service for GPIO…
… pin test in gpio-vm
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Commits on Apr 10, 2024
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Refactoring of code because of merge with newest tiiuae Ghaf
- changes concern activation and deactivation of virtualised elements in passthough of uarta, bpmp, gpio. - code deactivates uarta and bpmp because bpmp kernel patches conflict with gpio patches. This could be fixed by remaking the bpmp patches.
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Commits on Apr 12, 2024
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The vda device is removed from the gpio-vm because it will not work while we do not have the proper Device Tree in the VM.
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Commits on Apr 15, 2024
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Commits on Apr 16, 2024
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fails to build the right device tree for microvm@gpio-vm
startup of VM fails because the DT does not provide the vda device
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Commits on Apr 17, 2024
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Commits on Apr 18, 2024
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gpio-vm starts up with an unique Device Tree
gpio-vm's device tree tegra234-p3701-0000-gpio-passthrough.dtb declares the vda device needed for passthrough. gpio-vm goes into emergency mode because it cannot open AMA0 as a console. Uarta passthrough is disabled because of conflicts with GPIO passthrough. We need to disable the QEMU console. Somewhere in the code console=ttyAMA0 is set for QEMU. It is not obvious where.
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Commits on Apr 19, 2024
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At the moment device tree overlays are not working when applied according to template from other VM's. Posible cause is big changes introduced in upstream. Will merge with tiiuae after this commit.
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Commits on Apr 24, 2024
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gpio-vm running and starting up linux but with wrong qemu parameters
VM kernel params are -amend rootwait console=ttyS3 No qemu.extraArgs are set
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Commits on May 2, 2024
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Partially back tracking to older version on tiiuae/ghaf on git
Recent merge is partially retrenched. Newer files breaks this GPIO version because the host dtb overlay is broken by netvm-wlan-pci-passthrough. The changes in tiiuae git are realated to pci passthrough, optee kernel, "machine" option for microvm/qemu and a patch provided for netvm-wlan-pci-passthrough
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Commits on May 6, 2024
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Towards working guest driver for GPIO passthrough
GPIO guest driver in VM throws error at initialisation of shared qemu memory. ioremap fails: mem_iova = ioremap(gpio_vpa, MEM_SIZE);
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Commits on May 14, 2024
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Updated testing kernel with readl and writel passthrough
Guest proxy driver can passtrough low level readl and writel to host proxy. This might (meaning: still being tested) be necessary to allow guest to set up GPIO pins declared in guest's Device Tree.
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Commits on May 22, 2024
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Commits on Jun 26, 2024
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generation 207 -- drivers/kernel: 91eacb4cc1b6eee65cbef01e028442ba166…
…99608/72089e71a1f3d9f2d854711c6e16b703f1a426da
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Commits on Jul 10, 2024
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Commits on Jul 12, 2024
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Gpio works from chardev devices in guest and gpio-host-proxy
- New baseline for adding more passthrough functions - ./simple-chardev-test.sh works in /dev/gpio-host and /dev/gpio.guest - readl/writel execution blocked in host - Guest kernel is not aware of pins in host (gpioinfo gives false data) - use qemu: 8c5b0acccd3b4f47ba84d23b628ef294533e662a - kernel: e3a4e96cd08ab8d1a31498a10f8f7320ef53bd9d/2d96cc2e8e1c4ee4a3e973023b6c398a98dc0d93 - precompiled as nix generation 233
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Commits on Jul 25, 2024
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write return value to char buffer in write()
- return value written to char buffer in write() - return values from host seem reliable - return value is 64 bit written at offset 2 words, 2*8 bytes - full chain to guest does not work (qemu problem?) - platform to fix qemu problem - Guest kernel is not aware of pins in host (gpioinfo gives false data) - kernel: 5b7326f7ce046a8ae6c943e238a645356f237f7b/e625198f19ab6874ea89e0a7b1c5c4dfacb38710 - precompiled as nix generation 274
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Commits on Aug 2, 2024
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kernel has working passthrough for GPIO
- gpio-virt commit 71192f60bd8b8f6be4d529c49b7c33529e21a1e2 - kernel 5.10 commit fb9220ac23c9892ec6433f0e839b8f919511a927 - qemu in ghaf is not yet updated - use qemu 8.1.2 patch in commit 95d5cdb19713369a9dceab53659628292d9ff884 - precompiled into generation 299 (on dev system)
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Commits on Sep 3, 2024
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- added source patches: - kernel adfe63ef006a696e7384b9cee340f05bf7f4f1b3 from git@github.com:KimGSandstrom/tegra_kernel-5.10.git - gpio-virt patch d90bd5625957fd164e4eb50803bd724fda89ba68 from git@github.com:KimGSandstrom/gpio-virt.git - qemu 9.0.2 GPIO passthrough patch b077b3cb519958d091cd753f7015ffafd3bfcaee from git@github.com:KimGSandstrom/qemu-passthrough - GPIO passthrough works with provided qemu - microvm@gpio-vm.service does not start up correctly
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