On 10/27/2015 09:19 AM, Ian Jackson wrote:
George Dunlap writes ("Re: [Xen-devel] [PATCH] libxl: No emulated disk driver for
xvdX disk"):
On Tue, Oct 27, 2015 at 11:11 AM, Stefano Stabellini
<stefano.stabell...@eu.citrix.com> wrote:
The guest can access xvdX disks via the PV block protocol, or via
UEFI firmare using EFI BootServices.
But it introduces a sort of regression in some setups -- namely,
before you could use exactly the same disk and config file for either
a PV or HVM guest, simply adding builder=hvm (either to the file or
the command line) to switch between the two.
The purpose of the `vdev' in the xl disk specification is to say how
the disk should be presented to the guest.
Did you look at docs/misc/vbd-interface.txt ?
If you want something that is accessible via the BIOS etc. in HVM
guests, why not use vdev=hda rather than vdev=xvda ?
Yes, but since we've discovered that people do use xvda (and have been
doing this for long time --- our test framework has been running for
many years configured like that) --- do we want this to suddenly break?
-boris
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