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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] Xen on Debian Stretch on UEFI
Hi John, It turns out that on Friday I was able to get Xen booting directly from UEFI, without using GRUB at all. I followed the instructions on this page about getting the hypervisor to boot directly from UEFI: https://wiki.xenproject.org/wiki/Xen_EFI#Xen_as_EFI_binary_.28loading.29 However, it looks like our server's UEFI firmware has problems reading files bigger than 16MB if there is no additional chunking or buffering done. That issue is described on this page, along with a patch to the hypervisor sources that works around the problem: https://datacentersupport.lenovo.com/gb/en/solutions/ht506400 I ended up having to apply that patch and then compile the kernel in order to get a xen.efi file that would work on our server, but now it is working and the server is booting just fine. I may file a bug report about this, though I'm not familiar with the UEFI specification to know whether this is considered a UEFI firmware bug or something that should be fixed in the hypervisor/kernel code. Best wishes, -Ian On 23/04/18 09:02, John Naggets wrote: > Hi Ian, > > Have a look at this thread on the xen-devel mailing list: > https://lists.xenproject.org/archives/html/xen-devel/2018-03/msg00522.html > > To sum up you need to compile your own grub with the latest version > and do some chain loading (UEFI -> GRUB -> Xen) as it is not possible > to boot Xen directly from UEFI unfortunately. > > Best, > J. > > On Thu, Apr 19, 2018 at 10:12 AM, Ian Macdonald <imac@xxxxxxxxxx> wrote: >> Hi, >> >> I have been setting up a new server to run Xen, but can't seem to get >> the machine to boot the hypervisor correctly. The server has UEFI >> firmware and I don't think we can run it in BIOS compatibility mode >> because the particular hardware configuration requires full UEFI support >> in order for everything to work. >> >> I have installed Debian Stretch on the server and can boot via UEFI into >> GRUB and then Linux just fine. >> >> I have tried following the directions found on this page in order to get >> Xen booting: >> https://wiki.xenproject.org/wiki/Xen_EFI >> >> I have found that the Debian xen-hypervisor-4.8-amd64 package installs a >> file at /boot/xen-4.8-amd64.efi. Should I be able to use this as my EFI >> boot file? Or do I still need to actually compile Xen from sources in >> order to get a working 'xen.efi' file? >> >> I have tried copying all files from the /boot directory into >> /boot/efi/EFI/xen/ and then creating /boot/efi/EFI/xen/xen-4.8-amd64.cfg >> with the following contents: >> >> [global] >> default=xen >> >> [xen] >> options=console=vga loglvl=all noreboot >> kernel=vmlinuz-4.9.0-6-amd64 >> root=UUID=c0589119-f679-4b3c-ac62-7a686ffe00b9 ro >> ramdisk=initrd.img-4.9.0-6-amd64 >> >> I then created an EFI boot entry pointing at Xen: >> efibootmgr -w -L Xen -l "\EFI\xen\xen-4.8-amd64.efi" -c >> >> When I try to boot from that menu entry, the machine's firmware just >> returns to system setup or to the boot menu, suggesting to me that it >> doesn't recognise or isn't able to boot from xen-4.8-amd64.efi. I also >> tried renaming that file to xen.efi and having the config in xen.cfg >> just in case that made a difference, but the result was the same. >> >> I have tried booting Debian without using GRUB, using the kernel EFI >> stub to boot, according to the instructions at >> 'https://wiki.debian.org/EFIStub'. I got that to work for booting the >> normal kernel, so I know I can boot the mainline Linux kernel directly >> from the EFI firmware without GRUB, but I've not been able to boot the >> Xen hypervisor. >> >> Any suggestions or advice would very much appreciated. >> >> Many thanks, >> -Ian Macdonald >> GreenNet >> >> -- >> Ian Macdonald >> GPG/PGP: 0778 889F EE5D DFB4 D195 97A7 779B D6BF A305 DEFC >> XMPP/OTR: imac@xxxxxxxxxx Wire.com: @idmacdonald >> >> GreenNet Ltd, 56-64 Leonard Street, London EC2A 4LT >> UK Tel: 0330 355 4011 >> Intl: +44 20 7065 0935 >> Twitter: @GreenNetISP >> Registered in England & Wales, Company No. 02070438 >> >> >> _______________________________________________ >> Xen-users mailing list >> Xen-users@xxxxxxxxxxxxxxxxxxxx >> https://lists.xenproject.org/mailman/listinfo/xen-users > > _______________________________________________ > Xen-users mailing list > Xen-users@xxxxxxxxxxxxxxxxxxxx > https://lists.xenproject.org/mailman/listinfo/xen-users > -- Ian Macdonald GPG/PGP: 0778 889F EE5D DFB4 D195 97A7 779B D6BF A305 DEFC XMPP/OTR: imac@xxxxxxxxxx Wire.com: @idmacdonald GreenNet Ltd, 56-64 Leonard Street, London EC2A 4LT UK Tel: 0330 355 4011 Intl: +44 20 7065 0935 My desk: +44 20 3559 4011 Twitter: @GreenNetISP Registered in England & Wales, Company No. 02070438 Attachment:
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