Xen 4.8, qemu 2.12.0 - Live CDs fail to boot from 64-bit kernels

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Xen 4.8, qemu 2.12.0 - Live CDs fail to boot from 64-bit kernels

Stephen Oberholtzer
Okay, I've been struggling with this for ages, and have enough data to come back here.

* Xen 4.8 ('xl info' outputs 4.8.4-pre, but it's Debian version 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9) 
* QEMU emulator version 2.12.0 (Debian 1:2.12+dfsg-3)

Trying to boot a Knoppix or Debian Live ISO inside an HVM fails: CD-ROM emulation fails.
What's extremely strange is that 32-bit kernels boot just fine, it's just 64-bit kernels that have a problem.

Furthermore, the kernels don't exhibit this problem if I run qemu directly (no Xen acceleration).

Having libata dump the IDENTIFY data had a most curious result: all zeroes.

--
-- Stevie-O
Real programmers use COPY CON PROGRAM.EXE


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