Re: [PATCH 3/3] CI: Adjust how domU is packaged in dom0

["Marek Marczykowski-Górecki" <marmarek@invisiblethingslab.com>]

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On Thu, May 22, 2025 at 06:36:40PM +0100, Andrew Cooper wrote:
> Package domU in /root for dom0 and insert into the uncompressed part of dom0's
> rootfs, rather than recompressing it as part of the overlay.

It doesn't really need moving to /root to achieve this, no? The
domU-in-dom0.cpio can very well contain boot/* files.

> For Qubes, this avoids putting the domU kernel in dom0's rootfs for tests
> which aren't going to boot a guest.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
> ---
> CC: Anthony PERARD <anthony.perard@vates.tech>
> CC: Stefano Stabellini <sstabellini@kernel.org>
> CC: Michal Orzel <michal.orzel@amd.com>
> CC: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
> ---
>  automation/scripts/qubes-x86-64.sh            | 20 +++++++++++++------
>  .../scripts/xilinx-smoke-dom0-x86_64.sh       | 16 +++++++++++----
>  2 files changed, 26 insertions(+), 10 deletions(-)
> 
> diff --git a/automation/scripts/qubes-x86-64.sh b/automation/scripts/qubes-x86-64.sh
> index 1dd3f48b3d29..17a37134f46a 100755
> --- a/automation/scripts/qubes-x86-64.sh
> +++ b/automation/scripts/qubes-x86-64.sh
> @@ -154,8 +154,8 @@ esac
>  domU_config="
>  type = '${domU_type}'
>  name = 'domU'
> -kernel = '/boot/vmlinuz'
> -ramdisk = '/boot/initrd-domU'
> +kernel = '/root/vmlinuz-domU'
> +ramdisk = '/root/initrd-domU'
>  cmdline = 'root=/dev/ram0 console=hvc0'
>  memory = 512
>  vif = [ ${domU_vif} ]
> @@ -185,12 +185,24 @@ Kernel \r on an \m (\l)
>      find . | cpio -H newc -o | gzip >> ../binaries/domU-rootfs.cpio.gz
>      cd ..
>      rm -rf rootfs
> +
> +    # Package domU kernel+rootfs in /root for dom0 (uncompressed)
> +    mkdir -p rootfs/root
> +    cd rootfs
> +    cp ../binaries/bzImage root/vmlinuz-domU
> +    cp ../binaries/domU-rootfs.cpio.gz root/initrd-domU
> +    find . | cpio -H newc -o > ../binaries/domU-in-dom0.cpio
> +    cd ..
> +    rm -rf rootfs
>  fi
>  
>  # Dom0 rootfs.  The order or concatination is important; ucode wants to come
>  # first, and all uncompressed must be ahead of compressed.
>  parts=(
>      binaries/ucode.cpio
> +)
> +[ -n "$domU_check" ] && parts+=(binaries/domU-in-dom0.cpio)
> +parts+=(
>      binaries/rootfs.cpio.gz
>      binaries/xen-tools.cpio.gz
>  )
> @@ -238,10 +250,6 @@ mkdir -p etc/default
>  echo "XENCONSOLED_TRACE=all" >> etc/default/xencommons
>  echo "QEMU_XEN=/bin/false" >> etc/default/xencommons
>  mkdir -p var/log/xen/console
> -cp ../binaries/bzImage boot/vmlinuz
> -if [ -n "$domU_check" ]; then
> -    cp ../binaries/domU-rootfs.cpio.gz boot/initrd-domU
> -fi
>  find . | cpio -H newc -o | gzip >> ../binaries/dom0-rootfs.cpio.gz
>  cd ..
>  
> diff --git a/automation/scripts/xilinx-smoke-dom0-x86_64.sh b/automation/scripts/xilinx-smoke-dom0-x86_64.sh
> index 0fbabb41054a..29817ff81d0a 100755
> --- a/automation/scripts/xilinx-smoke-dom0-x86_64.sh
> +++ b/automation/scripts/xilinx-smoke-dom0-x86_64.sh
> @@ -22,8 +22,8 @@ DOMU_CMD=""
>  DOMU_CFG='
>  type = "pvh"
>  name = "domU"
> -kernel = "/boot/vmlinuz"
> -ramdisk = "/boot/initrd-domU"
> +kernel = "/root/vmlinuz-domU"
> +ramdisk = "/root/initrd-domU"
>  extra = "root=/dev/ram0 console=hvc0"
>  memory = 512
>  '
> @@ -103,10 +103,20 @@ find . | cpio -H newc -o | gzip >> ../binaries/domU-rootfs.cpio.gz
>  cd ..
>  rm -rf rootfs
>  
> +# Package domU kernel+rootfs in /root for dom0 (uncompressed)
> +mkdir -p rootfs/root
> +cd rootfs
> +cp ../binaries/bzImage root/vmlinuz-domU
> +cp ../binaries/domU-rootfs.cpio.gz root/initrd-domU
> +find . | cpio -H newc -o > ../binaries/domU-in-dom0.cpio
> +cd ..
> +rm -rf rootfs
> +
>  # Dom0 rootfs.  The order or concatination is important; ucode wants to come
>  # first, and all uncompressed must be ahead of compressed.
>  parts=(
>      binaries/ucode.cpio
> +    binaries/domU-in-dom0.cpio
>      binaries/rootfs.cpio.gz
>      binaries/xen-tools.cpio.gz
>  )
> @@ -127,8 +137,6 @@ echo "${DOMU_CFG}${DOMU_CFG_EXTRA}" > etc/xen/domU.cfg
>  echo "XENCONSOLED_TRACE=all" >> etc/default/xencommons
>  echo "QEMU_XEN=/bin/false" >> etc/default/xencommons
>  mkdir -p var/log/xen/console
> -cp ../binaries/bzImage boot/vmlinuz
> -cp ../binaries/domU-rootfs.cpio.gz boot/initrd-domU
>  find . | cpio -H newc -o | gzip >> ../binaries/dom0-rootfs.cpio.gz
>  cd ..
>  
> -- 
> 2.39.5
> 

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab

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