Wondering if anyone has managed to get Xen to boot from UEFI?
We have a relatively new server with a Supermicro X11SSH-F mainboard with an M.2 SSD. If we switch the boot mode to Legacy in the BIOS no boot devices show up. The vendor says this is because M.2 SSD is only supported in UEFI mode. We even tried installing some spinning SATA drives and a USB thumb drive but those don't show up as bootable either in legacy mode.
Trying to boot Xen 4.6 from the centos-release-xen repo results in:
Loading Xen 4.6.6-8.el7 error: can't find command 'multiboot'. Loading Linux 4.9.75-29.el7.x86_64 ... error: can't find command 'module'. Loading initial ramdisk ... error: can't find command 'module'.
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From what I've read we need to compile xen.efi and boot it natively.
I found this: https://wiki.xenproject.org/wiki/Xen_EFI#Compiling_Xen_as_EFI
Which sugests binutils doesn't support PE (EFI), which looks to be the case with the stock version on CentOS 7, note missing i386pe from the list of supported emulations:
# ld -V GNU ld version 2.25.1-32.base.el7_4.2 Supported emulations: elf_x86_64 elf32_x86_64 elf_i386 i386linux elf_l1om elf_k1om
I downloaded binutils 2.30 from http://ftp.gnu.org/gnu/binutils/ and built it with:
yum -y groupinstall "Development Tools" tar xzf binutils-2.30.tar.gz cd binutils-2.30 ./configure --enable-targets=x86_64-pep make make install
Now I have a version that supports i386pe:
# /usr/local/bin/ld -V GNU ld (GNU Binutils) 2.30 Supported emulations: elf_x86_64 elf32_x86_64 elf_i386 elf_iamcu i386linux elf_l1om elf_k1om i386pep i386pe
However at this point I guess I need to rebuild Xen from source in order to obtain the xen.efi binary, and I'm not sure how to do that.
Am I on the right path? Any tips on how to recompile Xen to get xen.efi binary? Or am I barking up the wrong tree?
Thanks in advance for any advice.
Chris
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