Starting with
Xen Changes For Linux 4.11: Lands PVHv2 Guest Support
https://www.phoronix.com/scan.php?page=news_item&px=Linux-4.11-Xen-Changes
[GIT PULL] xen: features and fixes for 4.11-rc0
http://lkml.iu.edu/hypermail/linux/kernel/1702.2/03209.html
IIUC, Xen 4.9 + kernel-default > v4.11 should now fully support PVHv2?
I'm running Xen 4.9.0 host on kernel 4.11.3
dmesg | egrep -i "linux version|xen version"
[ 0.000000] Linux version 4.11.3-2.g7262353-default
(geeko@buildhost) (gcc version 7.1.1 20170517 [gcc-7-branch revision 248152]
(SUSE Linux) ) #1 SMP PREEMPT Thu May 25 17:55:04 UTC 2017 (7262353)
[ 0.000000] Xen version: 4.9.0_07-503 (preserve-AD)
, both installed from pkgs built for an Opensuse Leap 42.2 env.
The docs @
https://xenbits.xen.org/docs/unstable/misc/hvmlite.html
https://xenbits.xen.org/docs/unstable/man/xl.cfg.5.html#Support-for-Paravirtualisation-of-HVM-Guests
are not clear on usage.
This
https://xenbits.xen.org/docs/unstable/misc/pvh.html
suggests that for
PVH
...
ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz, "generic")
...
the .cfg spec'n should be
builder='generic'
but, there's no mention of which value for specific PVHv2 usage.
Poking around, I've found discussion that PVH may be eventually retired, and
replaced with PVHv2, with same usage.
Is that the case already? Or is there a transition state in effect, where both
are available?
Atm, I do have a 'converted' HVM guest booting into _some- form of PVH for
testing.
My current setup -- cobbled together from old PVH notes and some older posts,
contains, in Grub
GRUB_CMDLINE_XEN="dom0=hvm dom0_mem=4G,max:4G dom0_max_vcpus=4 ..."
^^^^^^^^
and in Guest.cfg
builder = 'linux'
kernel = '/usr/lib/grub2/x86_64-xen/grub.xen'
xen_platform_pci = 1
device_model_version = 'qemu-xen'
...
With that^, the guest *IS* up & , as far as I've tested, functional.
At current host & guest loglevels, I've not yet seen any errors -- I'm just
not yet clear whether it's successfully, or completely & correctly, PVHv2 ...
Bottom line --
What *IS* the config/usage for PVHv2? (Any current docs available?)
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