Re: [Xen-devel] pvgrub2 is merged

[M A Young <m.a.young@xxxxxxxxxxxx>]

On Sun, 10 Nov 2013, Andrey Borzenkov wrote:

> Ð Sat, 09 Nov 2013 21:52:20 +0100
> Vladimir 'Ï-coder/phcoder' Serbinenko <phcoder@xxxxxxxxx> ÐÐÑÐÑ:
>
> > Hello, all. pvgrub2 has just became part of upstream grub as ports i386-xen and 
> > x86_64-xen.
> > http://git.savannah.gnu.org/cgit/grub.git
> >
> > Documentation on its usage is missing for now but in short:
> > ARCH=x86_64
> > ./autogen.sh
> > ./configure --target=$ARCH --with-platform=xen
> > make
> > mkdir -p boot/grub/
> > cat > boot/grub/grub.cfg <<EOF
> > search -s root -f /boot/grub/grub.cfg
> > configfile /boot/grub/grub.cfg
> > EOF
> > ./grub-mkstandalone --grub-mkimage=./grub-mkimage -o grub.xen -O $ARCH-xen -d 
> > grub-core/ boot/grub/grub.cfg
> Do I understand it correctly that to use grub.xen it is enough to add
>
> kernel = "/path/to/grub.xen"
>
> to guest configuration?
I have found the following problems in doing this;

The instructions are missing a step. You I found I had to do
export pkgdatadir=.
before running ./grub-mkstandalone as otherwise it looks for some files in 
the installed version of grub2 rather than the build location.
Your script
search -s root -f /boot/grub/grub.cfg
configfile /boot/grub/grub.cfg
only checks one location, and the grub.cfg file can be in other places 
such as /grub/grub.cfg if there is a separate boot partition, or 
/boot/grub2/grub.cfg for Fedora. For testing it can be set correctly by 
hand but more locations would need to be searched for general use.
It doesn't seem to understand sub-partitions. I can get it to work if 
the boot files are in /dev/xvda but not in /dev/xvda1 .
        Michael Young

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