Re: [Fedora-xen] CONFIG_XEN_PVH ?
On Tue, Jun 03, 2014 at 02:12:17PM -0400, Bill McGonigle wrote:
> > Hi, everybody,
> >
> > Went to give PVH a try, seeing as we have 4.4 and 3.14 now in f20, but:
> >
> > # grep XEN.*PV /boot/config-3.14.4-200.fc20.x86_64
> > CONFIG_XEN_PVHVM=y
> > # CONFIG_XEN_PVH is not set
> > CONFIG_XEN_HAVE_PVMMU=y
Posting my notes here, in case anybody else is trying it and wants to compare. I
haven't yet had luck getting a pvh domU to launch. I think I'm doing what the
documentation calls for, but clearly something is missing.
Current bits are up here:
https://www.bfccomputing.com/downloads/fedora/xen/f20/
I've got Xen 4.4 booting and a kernel built with PVH support, but when starting a domU
with 'pvh=1' I get:
xc_dom_parse_image: unsupported feature requested
and the domain fails to build. I did verify that BUILD/kernel-foo/.config is getting the
entry, and it sure looks like the symbols are in the kernel:
[root@librescu xen]# grep -i pvh /boot/config-3.14.4-200.xenpvh.fc20.x86_64
/boot/System.map-3.14.4-200.xenpvh.fc20.x86_64
/boot/config-3.14.4-200.xenpvh.fc20.x86_64:# Linux/x86_64 3.14.4-200.xenpvh.fc20.x86_64
Kernel Configuration
/boot/config-3.14.4-200.xenpvh.fc20.x86_64:CONFIG_XEN_PVHVM=y
/boot/config-3.14.4-200.xenpvh.fc20.x86_64:CONFIG_XEN_PVH=y
/boot/System.map-3.14.4-200.xenpvh.fc20.x86_64:ffffffff81004340 t xen_pvh_set_cr_flags
/boot/System.map-3.14.4-200.xenpvh.fc20.x86_64:ffffffff816e04d0 T
xen_pvh_secondary_vcpu_init
/boot/System.map-3.14.4-200.xenpvh.fc20.x86_64:ffffffff81d2a0a9 t xen_pvh_gnttab_setup
/boot/System.map-3.14.4-200.xenpvh.fc20.x86_64:ffffffff81e5fd48 t
__initcall_xen_pvh_gnttab_setup1
[root@librescu xen]# uname -r
3.14.4-200.xenpvh.fc20.x86_64
So, I'm not sure what's up. I added "loglvl=all guest_loglvl=all" to
grub and can get another reboot in this weekend to see if there's any more info
logged.
It also looks like I should update my 4.4 tarball to the stable-4.4 branch for non-broken
guest shutdowns (but one step at a time).
-Bill
--
Bill McGonigle, Owner
BFC Computing, LLC
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