ayankuma@xcbayankuma40x:/scratch$ repo sync
  File "/scratch/.repo/repo/main.py", line 79
    file=sys.stderr)
        ^
SyntaxError: invalid syntax

You need to add python3 before 'repo'. The command will then be as follows :-

# initialize the repo.
python3 repo init -u https://github.com/Xilinx/yocto-manifests.git -b <release-version>

# repo sync to get all sources
python3 repo sync

If builds complains about "Checkpolicy" or flask, do the following:

# edit  yocto_xen/source/meta-virtualization/recipes-extended/xen/xen.inc
# to the DEPENDS variable, add this line below gnu-efi
     checkpolicy-native \
 
# Save and bitbake again

If build fails due to "qemu-xen-dir-find failed" issue: Always clean the xen repo before invoking "MACHINE=zcu102-zynqmp bitbake xen-image-minimal" ie do the following

cd /path_to_xen_source/
git clean -fdx
git reset --hard

1. 
   

   Code Block
   language bash
   Initialising tasks: 100% |############################################################################################| Time: 0:00:03 Sstate summary: Wanted 7 Found 0 Missed 7 Current 2070 (0% match, 99% complete) NOTE: Executing Tasks ERROR: xen-tools-4.14+stable999-r0 do_package_qa: QA Issue: xen-tools-pygrub: /work/cortexa72-cortexa53-xilinx-linux/xen-tools/4.14+s table999-r0/packages-split/xen-tools-pygrub/usr/lib/xen/bin/pygrub maximum shebang size exceeded, the maximum size is 128. [shebang-s ize] ERROR: xen-tools-4.14+stable999-r0 do_package_qa: QA Issue: /usr/lib/xen/bin/pygrub contained in package xen-tools-pygrub requires /s cratch/ayankuma/xilinx_yocto/build/tmp/work/cortexa72-cortexa53-xilinx-linux/xen-tools/4.14+stable999-r0/recipe-sysroot-native/usr/bi n/python3-native/python3, but no providers found in RDEPENDS_xen-tools-pygrub? [file-rdeps] ERROR: xen-tools-4.14+stable999-r0 do_package_qa: QA run found fatal errors. Please consider fixing them. ERROR: Logfile of failure stored in: /scratch/ayankuma/xilinx_yocto/build/tmp/work/cortexa72-cortexa53-xilinx-linux/xen-tools/4.14+s$ able999-r0/temp/log.do_package_qa.11224 ERROR: Task (/scratch/ayankuma/xilinx_yocto/sources/core/../meta-virtualization/recipes-extended/xen/xen-tools_4.14.bb:do_package_qa) failed with exit code '1'

   
   

2. The solution would be to remove pygrub. Under xen-tools.inc: do_install()

   Code Block
   language bash
   rm -r ${D}${bindir}/pygrub rm -r ${D}${libdir}/xen/bin/pygrub

   
   

1. 
   

   Code Block
   language bash
   Public key portion is: ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCGljmUgRv8Kri5kDW/iCBElkjPFNs8qUSqOPvxjxbKXR5ZFZg4TjFc3LbHUjZFuOIqCPqWv82qp77rdwnc1dGpKvD7F/FHt9oPJgsFukurhaXhs99P+Z5BLZInj7ygM8V0u6pkZ7u5QyaLDpff03T0yt1BwiLFFHAcWnspJCljzvOIXVGh7RdZ9ob39gA74VpxM+yAxfIafM2xBySYkK56BIL+Jzc810HTSKbP7h5jEYSDBkCa2Or3QEbXth+DAZpapV5no70FcgXWFarevCFIrLgw7T3z8eILg3YPyaSPuWSbLOzUYNGh/RYMMUgUjtAuS4+cm6u3N05O1xT2tJGf root@zcu102-zynqmp Fingerprint: sha1!! f3:af:73:ac:22:15:0b:b0:97:90:19:75:27:21:e0:ef:c5:cd:c8:99 dropbear. Starting internet superserver: inetd. Starting syslogd/klogd: done Starting /usr/sbin/xenstored.../etc/xen/scripts/launch-xenstore: line 86: prlimit: command not found .............................. Could not start /usr/sbin/xenstored Starting domain watchdog daemon: xenwatchdogd startup

   
   

2. The solution would be to add util-linux-prlimit and util-linux to the list of installed images.

   1. You can do either the below change

      Code Block
      language bash
      diff --git a/recipes-extended/xen/xen-tools.inc b/recipes-extended/xen/xen-tools.inc index 722c503..791f6fb 100644 --- a/recipes-extended/xen/xen-tools.inc +++ b/recipes-extended/xen/xen-tools.inc @@ -30,7 +30,7 @@ GLIBC32_class-native = "" DEPENDS += "${GLIBC32}" RDEPENDS_${PN} = "\ - bash perl xz \ + bash perl xz util-linux-prlimit util-linux \ ${PN}-console \ ${PN}-libxenguest \ ${PN}-libxenlight \

      
      

   2. Or a proper solution would be to do the following

      
      

      Code Block
      language bash
      diff --git a/recipes-extended/images/xen-image-minimal.bb b/recipes-extended/images/xen-image-minimal.bb index 6733801..ee5bf02 100644 --- a/recipes-extended/images/xen-image-minimal.bb +++ b/recipes-extended/images/xen-image-minimal.bb @@ -9,6 +9,8 @@ XEN_KERNEL_MODULES ?= "kernel-module-xen-blkback kernel-module-xen-gntalloc \ " IMAGE_INSTALL += " \ + util-linux \ + util-linux-prlimit \ packagegroup-core-boot \ packagegroup-core-ssh-openssh \ ${XEN_KERNEL_MODULES} \

      
      

1. 
   

   Code Block
   language bash
   Setting domain 0 name, domid and JSON config... FATAL: Failed to open connection to gnttab: No such file or directory cannot set domid for Dom0

   
   

2. Solution :- The kernel image is missing some of the XEN configs. You may use the kernel configuration attached here 1697873938

1. 
   

   Code Block
   language bash
   | ERROR: pkg-config binary 'aarch64-xilinx-linux-pkg-config' not found | | make: Entering directory '/scratch/ayankuma/upstream_xen/xen/tools/qemu-xen-build'

   
   

   1. The remedy is as follows :-

      
      

      1. In xen/tools/Makefile, disable building subdir-install-qemu-xen-dir as follows

      2. 
         

         Code Block
         language bash
         -subdir-install-qemu-xen-dir: subdir-all-qemu-xen-dir - cd emu-xen-build; \ +#subdir-install-qemu-xen-dir: subdir-all-qemu-xen-dir +# cd emu-xen-build; \ $(MAKE) install

         
         

2. Or errors related to "unistd.h" not present or gcc related errors
   1. cd <to_dir>/xen
   2. git clean -fdx
   3. git clean -fdx
   4. git reset --hard HEAD
   5. cd <to_dir>/xen/tools/qemu-xen-dir-remote
   6. git clean -fdx
   7. And then in Yocto , do the following
      1. MACHINE=zcu102-zynqmp bitbake -c clean  xen-image-minimal
      2. MACHINE=zcu102-zynqmp bitbake  xen-image-minimal

1. 
   

   Code Block

   ERROR: xen-tools-4.14+stable999-r0 do_compile: oe_runmake failed ERROR: xen-tools-4.14+stable999-r0 do_compile: Execution of '/scratch/ayankuma/xilinx_yocto/build/tmp/work/cortexa72-cortexa53-xilinx-linux/xen-tools/4.14+stable999-r0/temp/run.do_compile.23363' failed with exit code 1: make -C tools/include install make[1]: Entering directory '/scratch/ayankuma/upstream_xen/xen/tools/include' /scratch/ayankuma/upstream_xen/xen/tools/include/../../tools/Rules.mk:174: *** You have to run ./configure before building or installing the tools. Stop.

   
   

2. rm -rf tmp

3. 
   

   Repeat the steps 5.b

1. You need to remove "version-going-backwards" from ERROR_QA in core/meta/classes/insane.bbclass

2. Thus  core/meta/classes/insane.bbclass will have the following for ERROR_QA

   Code Block
   language bash
   ERROR_QA ?= "dev-so debug-deps dev-deps debug-files arch pkgconfig la \ perms dep-cmp pkgvarcheck perm-config perm-line perm-link \ split-strip packages-list pkgv-undefined var-undefined \ expanded-d invalid-chars \ license-checksum dev-elf file-rdeps configure-unsafe \ configure-gettext perllocalpod shebang-size \ already-stripped installed-vs-shipped ldflags compile-host-path \ install-host-path pn-overrides unknown-configure-option \ useless-rpaths rpaths staticdev \ "

   
   

For release 2022.1 and 2022.2, there is an issue with task do_write_xen_qemuboot_dtb for xen-image-minimal build and this results in following error:

| Multiarch not setup properly.
| WARNING: /scratch/devops/yocto/yocto_test/build/tmp/work/vck190_versal-xilinx-linux/xen-image-minimal/1.0-r0/temp/run.do_write_xen_qemuboot_dtb.14323:165 exit 1 from 'qemu-system-aarch64-multiarch -device qemu-xhci -device usb-tablet -device usb-kbd -machine virt,gic-version=3 -machine virtualization=true ${QB_CPU} -m 512 -nographic -serial mon:stdio -machine "dumpdtb=/scratch/devops/yocto/yocto_test/build/tmp/work/vck190_versal-xilinx-linux/xen-image-minimal/1.0-r0/xen-image-minimal-1.0/qemu-dumped.dtb"'
| WARNING: Backtrace (BB generated script):
|       #1: generate_xen_qemuboot_dtb, /scratch/devops/yocto/yocto_test/build/tmp/work/vck190_versal-xilinx-linux/xen-image-minimal/1.0-r0/temp/run.do_write_xen_qemuboot_dtb.14323, line 165
|       #2: do_write_xen_qemuboot_dtb, /scratch/devops/yocto/yocto_test/build/tmp/work/vck190_versal-xilinx-linux/xen-image-minimal/1.0-r0/temp/run.do_write_xen_qemuboot_dtb.14323, line 154
|       #3: main, /scratch/devops/yocto/yocto_test/build/tmp/work/vck190_versal-xilinx-linux/xen-image-minimal/1.0-r0/temp/run.do_write_xen_qemuboot_dtb.14323, line 325
ERROR: Task (/scratch/devops/yocto/yocto_test/sources/core/../meta-virtualization/recipes-extended/images/xen-image-minimal.bb:do_write_xen_qemuboot_dtb) failed with exit code '1'

Please run below steps and apply the attached 0001-Fix-for-xen-image-minimal.patch :

# If git tool is installed, user can apply patch using git:
cd {Yocto_dir}/sources/meta-virtualization
git am 0001-Fix-for-xen-image-minimal.patch

# If git tools isn't installed, user can edit following file:
vim {Yocto_dir}/sources/meta-virtualization/recipes-extended/images/xen-image-minimal.bb and add below line:
deltask do_write_xen_qemuboot_dtb

# Finally, re-run the bitbake
MACHINE=vck190-versal bitbake xen-image-minimal

If there are error about missing pmu-rom.elf like below: 

runqemu - ERROR - Failed to run qemu:
Error: Missing PMU ROM: /scratch/devops/yocto/yocto_xen/build/tmp/deploy/images/zcu102-zynqmp/pmu-rom.elf
See "meta-xilinx/README.qemu.md" for more information on accquiring the PMU ROM.

Please copy a pmu-rom.elf under pre-built/linux/images folder of a BSP(you can download from here) or can be build using yocto like below:

 MACHINE=zcu102-zynqmp bitbake petalinux-image-minimal