Messages in this thread | | | Subject | Re: kvm_intel fails to load on Conroe CPUs running Linux 4.12 | From | Sebastian Rachuj <> | Date | Mon, 7 Aug 2017 20:43:54 +0200 |
| |
On 07.08.2017 19:50, Paolo Bonzini wrote: > On 07/08/2017 19:17, Sebastian Rachuj wrote: >>>> >>>> Thank you for looking into the issue. My cpuinfo is as follows: >>> >>> Looks like Intel was already differentiating virtualization features >>> across SKUs. Please run the attached script as root to see what other >>> things are different (apparently) between non-Xeon and Xeon Conroes. >> >> Here you are, I hope it helps: > > Not much to say, unfortunately. It's pretty much the same capabilities > as a Prescott/Cedar Mill processor, except that it has MSR bitmaps. It > also lacks FlexPriority compared to the Conroe I had checked. > > It's not great that even the revert patch doesn't apply cleanly---this > is *not* necessarily a boring area of the hypervisor... > > Given the rarity of your machine I'm currently leaning towards _not_ > reverting the change. I'll check another non-Xeon Core 2 tomorrow that > is from December 2008 (IIRC). If that one also lacks vNMI, or if I get > other reports, I suppose I will have to reconsider that.
That's unfortunate to hear. Just for completeness, I want to mention a thread in the Archlinux forum, I created, where two other people (Sadar and losko) also complained about not working KVM [1]. Additionally, Linux 4.12 has not reached yet reached distributions with a greater amount of users.
If supporting these chips is too much of a hassle, I will probably have to buy a new CPU to enjoy KVM support with a current linux kernel.
Anyway, thanks again for figuring this out!
[1]: https://bbs.archlinux.org/viewtopic.php?id=228645
| |