About
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pvgrub2 kernels (3) are created during the build,
here is how they were extracted into this folder:

$ mkdir xxtemp && cd $_
$ ar -xv ../grub-xen-host_2.14~rc1-1+ub26u04.3_amd64.deb
x - debian-binary
x - control.tar.zst
x - data.tar.zst

mockbuild@booky:~/result/resolute-nmu-grub2/xxtemp$ ls -al
total 1388
drwxr-xr-x 2 mockbuild mockbuild    4096 Dec 27 09:42 .
drwxr-xr-x 9 mockbuild mockbuild    4096 Dec 27 09:41 ..
-rw-r--r-- 1 mockbuild mockbuild    1249 Dec 27 09:42 control.tar.zst
-rw-r--r-- 1 mockbuild mockbuild 1402408 Dec 27 09:42 data.tar.zst
-rw-r--r-- 1 mockbuild mockbuild       4 Dec 27 09:42 debian-binary

// find the kernels *.bin
mockbuild@booky:~/result/resolute-nmu-grub2/xxtemp$ tar -Ipzstd -tvf data.tar.zst --wildcards '*/*bin'
-rw-r--r-- root/root   1978156 2025-11-10 10:53 ./usr/lib/grub-xen/grub-i386-xen.bin
-rw-r--r-- root/root   2013392 2025-11-10 10:53 ./usr/lib/grub-xen/grub-i386-xen_pvh.bin
-rw-r--r-- root/root   2748704 2025-11-10 10:53 ./usr/lib/grub-xen/grub-x86_64-xen.bin

// do the extraction
mockbuild@booky:~/result/resolute-nmu-grub2/xxtemp$ tar -Ipzstd -xf data.tar.zst --wildcards '*/*bin'

// verify the presence of the local usr/lib*
mockbuild@booky:~/result/resolute-nmu-grub2/xxtemp$ ls -al
total 1392
drwxr-xr-x 3 mockbuild mockbuild    4096 Dec 27 09:42 .
drwxr-xr-x 9 mockbuild mockbuild    4096 Dec 27 09:41 ..
-rw-r--r-- 1 mockbuild mockbuild    1249 Dec 27 09:42 control.tar.zst
-rw-r--r-- 1 mockbuild mockbuild 1402408 Dec 27 09:42 data.tar.zst
-rw-r--r-- 1 mockbuild mockbuild       4 Dec 27 09:42 debian-binary
drwxr-xr-x 3 mockbuild mockbuild    4096 Dec 27 09:42 usr

mockbuild@booky:~/result/resolute-nmu-grub2/xxtemp$ cp -p usr/lib/grub-xen/grub-*bin ../pvgrub2/

mockbuild@booky:~/result/resolute-nmu-grub2/xxtemp$ cd ..

// the x86_64-xen object should support the zstd iofilter (new in 2.14)
mockbuild@booky:~/result/resolute-nmu-grub2$ ls -al pvgrub2/
total 6596
drwxr-xr-x 2 mockbuild mockbuild    4096 Dec 27 09:43 .
drwxr-xr-x 9 mockbuild mockbuild    4096 Dec 27 09:41 ..
-rw-r--r-- 1 mockbuild mockbuild 1978156 Nov 10 10:53 grub-i386-xen.bin
-rw-r--r-- 1 mockbuild mockbuild 2013392 Nov 10 10:53 grub-i386-xen_pvh.bin
-rw-r--r-- 1 mockbuild mockbuild 2748704 Nov 10 10:53 grub-x86_64-xen.bin


Author
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PryMar56
Dec 2025