Extra KVM Changes For Linux 4.15 Bring UMIP Support, AMD SEV Changes Delayed

[phoronix]

Phoronix: Extra KVM Changes For Linux 4.15 Bring UMIP Support, AMD SEV Changes Delayed

As some additional work past the KVM changes for Linux 4.15 submitted last week, a few more feature items have been queued...

http://www.phoronix.com/scan.php?page=news_item&px=Linux-4.15-KVM-Extra

[shmerl]

Regarding Qemu/KVM and libvirt-daemon, can anyone explain please, why Ryzen wasn't added to the list or processors in cpu_map.xml?

Because of that, virt-manager really gets mixed up. I had to manually add it to cpu_map.xml trying to fish out cpu features that Ryzen supports from /proc/cpuinfo.

I found this bug: https://bugzilla.redhat.com/show_bug.cgi?id=1445836
but it doesn't really explain it (or some comments are deleted there)? It's also closed for some reason.

[Jedibeeftrix]

did we ever get to the bottom of which of the various enterprise security/emcryption features from epyc are available on threadripper?

https://www.anandtech.com/show/11591/amd-launches-ryzen-pro-cpus-enhanced-security-longer-warranty-better-quality

[polarathene]

the AMD VFIO NFT performance fix

NPT? (Nested Page Tables), Pretty sure you meant that not NFT.

[Michael]

NPT? (Nested Page Tables), Pretty sure you meant that not NFT.

Typo, fixed. Thanks.

[polarathene]

Regarding Qemu/KVM and libvirt-daemon, can anyone explain please, why Ryzen wasn't added to the list or processors in cpu_map.xml?

Are you using the latest? You can ask question like that on r/VFIO and probably get a good answer as there are Ryzen users in the community. I'm pretty sure I saw someone mention similar but they fixed it by using git build on Arch(AUR). Could just be that you haven't got a version that has the support added.

[shmerl]

Are you using the latest? You can ask question like that on r/VFIO and probably get a good answer as there are Ryzen users in the community. I'm pretty sure I saw someone mention similar but they fixed it by using git build on Arch(AUR). Could just be that you haven't got a version that has the support added.

I'm using 3.9.0 which is the latest one. Here is the file in the master: https://gitlab.com/libvirt/libvirt/b...pu/cpu_map.xml

I don't see Ryzen there, only Epyc. Automatic option (copy host) detects it as Haswell-noTSX weirdly.

[benklett]

Damn, Linus rejected these patches: http://lkml.iu.edu/hypermail/linux/k...1.2/06155.html