[Bug 1778854] Re: kvm_pr on power9 not loadable
Since this works (using disable_radix thanks leonardo) in Cosmic and also through the HWE kernel on Bionic I think there is no more work needed. The trigger was P9 HW which is fine for this specific (and uncommon) function to define the HWE kernel as requirement. ** Changed in: qemu (Ubuntu Cosmic) Status: New => Invalid ** Changed in: linux (Ubuntu Cosmic) Status: New => Won't Fix ** Changed in: linux (Ubuntu Bionic) Status: Confirmed => Won't Fix ** Changed in: ubuntu-power-systems Status: Triaged => Fix Released ** Changed in: linux (Ubuntu Cosmic) Status: Won't Fix => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1778854] Re: kvm_pr on power9 not loadable
** Also affects: qemu (Ubuntu Cosmic) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Cosmic) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1778854] Re: kvm_pr on power9 not loadable
** Changed in: linux (Ubuntu) Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1778854] Re: kvm_pr on power9 not loadable
** Changed in: ubuntu-power-systems Importance: Medium => Wishlist ** Tags removed: targetmilestone-inin1804 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1778854] Re: kvm_pr on power9 not loadable
** Tags added: reverse-proxy-bugzilla targetmilestone-inin1804 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1778854] Re: kvm_pr on power9 not loadable
--- Comment From lagar...@br.ibm.com 2019-02-06 06:59 EDT--- Just an additional information: starting with linux 4.20 and QEMU 3.1 one can created nested guests on RPT guests as well using kvm_hv (kvm_pr will not work with RPT). ** Tags removed: targetmilestone-inin--- ** Tags added: targetmilestone-inin1804 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1778854] Re: kvm_pr on power9 not loadable
Interesting, thanks Leonardo! Tested on Bionic (4.15) and Disco (4.18). Default: sudo modprobe kvm_pr modprobe: ERROR: could not insert 'kvm_pr': Input/output error Added "disable_radix" to the guest kernel commandline and retried loading the module again. Bionic: Malformed early option 'disable_radix' Disco: accepts the option With that option set kvm_pr can be loaded. Thanks now all fits together, and that is "enough" for me. If there are kernel fixes that you'd want in Bionic to get disable_radix to work we can add a kernel task (I don't need it). TL;DR: for Disco forward I should be able to enable P9 based nested tests with that tweak in place. ** Also affects: qemu (Ubuntu Bionic) Importance: Undecided Status: New ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Changed in: linux (Ubuntu) Status: New => Fix Released ** Changed in: linux (Ubuntu Bionic) Status: New => Confirmed ** Changed in: linux (Ubuntu Bionic) Importance: Undecided => Wishlist ** Changed in: qemu (Ubuntu) Status: New => Invalid ** Changed in: qemu (Ubuntu Bionic) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1778854] Re: kvm_pr on power9 not loadable
FYI - until resolved some of my usual pre-upload tests have to be skipped on P9. ** Changed in: qemu (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1778854] Re: kvm_pr on power9 not loadable
I have run into this again. I've read that it works for you, but here is all I have and as I said before - what would you want me to report to look at? --- On power you can never load the usual kvm_hv module in a guest. $ sudo modprobe kvm_hv modprobe: ERROR: could not insert 'kvm_hv': No such device That is normal and expected. But on a Power9 system I can neither load kvm_pr which was usually the way to go for nested KVM. $ sudo modprobe kvm_pr modprobe: ERROR: could not insert 'kvm_pr': Input/output error There is no error whatsoever in dmesg when triggering this. >From libvirt the guest is defined with all defaults - see >http://paste.ubuntu.com/p/2r34SG6pq6/ That gives the guest CPU this guest view: cat /proc/cpuinfo processor : 0 cpu : POWER9 (architected), altivec supported clock : 2134.00MHz revision : 2.2 (pvr 004e 1202) timebase : 51200 platform : pSeries model : IBM pSeries (emulated by qemu) machine : CHRP IBM pSeries (emulated by qemu) MMU : Radix Nothing obvious here, also the module exists and seems normal to me: $ modinfo kvm_pr filename: /lib/modules/4.17.0-6-generic/kernel/arch/powerpc/kvm/kvm-pr.ko alias: devname:kvm alias: char-major-10-232 license: GPL srcversion: 2472883ADEEBC51508B6BF4 depends: kvm intree: Y name: kvm_pr vermagic: 4.17.0-6-generic SMP mod_unload mprofile-kernel relocatable sig_id: PKCS#7 signer: sig_key: sig_hashalgo: md4 signature: 30:82... Current kernel is From Cosmic (as that is what I test for atm): 4.17.0-6-generic If I start the guest with the "least virtual" cpu via I get no difference in /proc/cpuinfo from the guest nor does the problem change. FYI Host CPU reports as (this is already with smt off) [...] processor : 156 cpu : POWER9, altivec supported clock : 3800.00MHz revision: 2.2 (pvr 004e 1202) timebase: 51200 platform: PowerNV model : 9006-12C machine : PowerNV 9006-12C firmware: OPAL MMU : Radix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1778854] Re: kvm_pr on power9 not loadable
Hmm, in that case just teach me what data you'd want to look on when this happens again. We will keep the bug as incomplete and when I hit it again I can check what you would need to analyze it better. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1778854] Re: kvm_pr on power9 not loadable
** Changed in: ubuntu-power-systems Status: New => Triaged ** Changed in: ubuntu-power-systems Importance: Undecided => Medium ** Changed in: ubuntu-power-systems Assignee: (unassigned) => bugproxy (bugproxy) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1778854] Re: kvm_pr on power9 not loadable
** Tags added: architecture-ppc64le bugnameltc-169337 severity-medium targetmilestone-inin--- -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1778854] Re: kvm_pr on power9 not loadable
hi Christian, this is interesting. I tried to reproduce here on my P9 (with cosmic and kernel 4.15.0-22) , but I was not able to: ➜ ~ sudo modprobe kvm_pr ➜ ~ lsmod | grep kvm_pr kvm_pr107493 0 kvm 225431 1 kvm_pr ➜ ~ uname -a Linux cosmic 4.15.0-22-generic #24-Ubuntu SMP Wed May 16 12:12:37 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux ➜ ~ cat /proc/cpuinfo | grep model model : IBM pSeries (emulated by qemu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1778854] Re: kvm_pr on power9 not loadable
Added the project, please reverse mirror to get explained what (should) happen in this case. ** Also affects: ubuntu-power-systems Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
