[Kernel-packages] [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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable Status in The Ubuntu-power-systems project: Fix Released Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Won't Fix Status in qemu source package in Bionic: Invalid Status in linux source package in Cosmic: Fix Released Status in qemu source package in Cosmic: Invalid Bug description: Hi, this might be the worst bug report ever, but there just isn't a lot more info available when the issue occurs. I tried to set up 2nd level KVM on a P9 machine with kvm_pr but I run into (this is the series on commands I used on P8 btw): $ sudo modprobe kvm_pr modprobe: ERROR: could not insert 'kvm_pr': Input/output error Unfortunately there is no dmesg message (not even with level set to debug) or anything like it, so I'm stuck asking if P9 does not work with kvm_pr at all or if there are other constraints one should know? Note: while no more a problem for kvm_hv on P9 I disabled SMT but the issue persists. Modinfo LGTM and matches the kernel: ubuntu@bionic-kvm:~$ modinfo kvm_pr filename: /lib/modules/4.15.0-23-generic/kernel/arch/powerpc/kvm/kvm-pr.ko alias: devname:kvm alias: char-major-10-232 license:GPL srcversion: CE18B50FD03CB9D9C432700 depends:kvm intree: Y name: kvm_pr vermagic: 4.15.0-23-generic SMP mod_unload mprofile-kernel signat: PKCS#7 signer: sig_key: sig_hashalgo: md4 ubuntu@bionic-kvm:~$ uname -a Linux bionic-kvm 4.15.0-23-generic #25-Ubuntu SMP Wed May 23 17:59:00 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux It feels more that I'm missing something than a bug, but in that case I have to ask what it is. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable Status in The Ubuntu-power-systems project: Triaged Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in qemu source package in Bionic: Invalid Status in linux source package in Cosmic: New Status in qemu source package in Cosmic: New Bug description: Hi, this might be the worst bug report ever, but there just isn't a lot more info available when the issue occurs. I tried to set up 2nd level KVM on a P9 machine with kvm_pr but I run into (this is the series on commands I used on P8 btw): $ sudo modprobe kvm_pr modprobe: ERROR: could not insert 'kvm_pr': Input/output error Unfortunately there is no dmesg message (not even with level set to debug) or anything like it, so I'm stuck asking if P9 does not work with kvm_pr at all or if there are other constraints one should know? Note: while no more a problem for kvm_hv on P9 I disabled SMT but the issue persists. Modinfo LGTM and matches the kernel: ubuntu@bionic-kvm:~$ modinfo kvm_pr filename: /lib/modules/4.15.0-23-generic/kernel/arch/powerpc/kvm/kvm-pr.ko alias: devname:kvm alias: char-major-10-232 license:GPL srcversion: CE18B50FD03CB9D9C432700 depends:kvm intree: Y name: kvm_pr vermagic: 4.15.0-23-generic SMP mod_unload mprofile-kernel signat: PKCS#7 signer: sig_key: sig_hashalgo: md4 ubuntu@bionic-kvm:~$ uname -a Linux bionic-kvm 4.15.0-23-generic #25-Ubuntu SMP Wed May 23 17:59:00 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux It feels more that I'm missing something than a bug, but in that case I have to ask what it is. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable Status in The Ubuntu-power-systems project: Triaged Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in qemu source package in Bionic: Invalid Bug description: Hi, this might be the worst bug report ever, but there just isn't a lot more info available when the issue occurs. I tried to set up 2nd level KVM on a P9 machine with kvm_pr but I run into (this is the series on commands I used on P8 btw): $ sudo modprobe kvm_pr modprobe: ERROR: could not insert 'kvm_pr': Input/output error Unfortunately there is no dmesg message (not even with level set to debug) or anything like it, so I'm stuck asking if P9 does not work with kvm_pr at all or if there are other constraints one should know? Note: while no more a problem for kvm_hv on P9 I disabled SMT but the issue persists. Modinfo LGTM and matches the kernel: ubuntu@bionic-kvm:~$ modinfo kvm_pr filename: /lib/modules/4.15.0-23-generic/kernel/arch/powerpc/kvm/kvm-pr.ko alias: devname:kvm alias: char-major-10-232 license:GPL srcversion: CE18B50FD03CB9D9C432700 depends:kvm intree: Y name: kvm_pr vermagic: 4.15.0-23-generic SMP mod_unload mprofile-kernel signat: PKCS#7 signer: sig_key: sig_hashalgo: md4 ubuntu@bionic-kvm:~$ uname -a Linux bionic-kvm 4.15.0-23-generic #25-Ubuntu SMP Wed May 23 17:59:00 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux It feels more that I'm missing something than a bug, but in that case I have to ask what it is. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable Status in The Ubuntu-power-systems project: Triaged Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in qemu source package in Bionic: Invalid Bug description: Hi, this might be the worst bug report ever, but there just isn't a lot more info available when the issue occurs. I tried to set up 2nd level KVM on a P9 machine with kvm_pr but I run into (this is the series on commands I used on P8 btw): $ sudo modprobe kvm_pr modprobe: ERROR: could not insert 'kvm_pr': Input/output error Unfortunately there is no dmesg message (not even with level set to debug) or anything like it, so I'm stuck asking if P9 does not work with kvm_pr at all or if there are other constraints one should know? Note: while no more a problem for kvm_hv on P9 I disabled SMT but the issue persists. Modinfo LGTM and matches the kernel: ubuntu@bionic-kvm:~$ modinfo kvm_pr filename: /lib/modules/4.15.0-23-generic/kernel/arch/powerpc/kvm/kvm-pr.ko alias: devname:kvm alias: char-major-10-232 license:GPL srcversion: CE18B50FD03CB9D9C432700 depends:kvm intree: Y name: kvm_pr vermagic: 4.15.0-23-generic SMP mod_unload mprofile-kernel signat: PKCS#7 signer: sig_key: sig_hashalgo: md4 ubuntu@bionic-kvm:~$ uname -a Linux bionic-kvm 4.15.0-23-generic #25-Ubuntu SMP Wed May 23 17:59:00 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux It feels more that I'm missing something than a bug, but in that case I have to ask what it is. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable Status in The Ubuntu-power-systems project: Triaged Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in qemu source package in Bionic: Invalid Bug description: Hi, this might be the worst bug report ever, but there just isn't a lot more info available when the issue occurs. I tried to set up 2nd level KVM on a P9 machine with kvm_pr but I run into (this is the series on commands I used on P8 btw): $ sudo modprobe kvm_pr modprobe: ERROR: could not insert 'kvm_pr': Input/output error Unfortunately there is no dmesg message (not even with level set to debug) or anything like it, so I'm stuck asking if P9 does not work with kvm_pr at all or if there are other constraints one should know? Note: while no more a problem for kvm_hv on P9 I disabled SMT but the issue persists. Modinfo LGTM and matches the kernel: ubuntu@bionic-kvm:~$ modinfo kvm_pr filename: /lib/modules/4.15.0-23-generic/kernel/arch/powerpc/kvm/kvm-pr.ko alias: devname:kvm alias: char-major-10-232 license:GPL srcversion: CE18B50FD03CB9D9C432700 depends:kvm intree: Y name: kvm_pr vermagic: 4.15.0-23-generic SMP mod_unload mprofile-kernel signat: PKCS#7 signer: sig_key: sig_hashalgo: md4 ubuntu@bionic-kvm:~$ uname -a Linux bionic-kvm 4.15.0-23-generic #25-Ubuntu SMP Wed May 23 17:59:00 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux It feels more that I'm missing something than a bug, but in that case I have to ask what it is. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable Status in The Ubuntu-power-systems project: Triaged Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in qemu source package in Bionic: Invalid Bug description: Hi, this might be the worst bug report ever, but there just isn't a lot more info available when the issue occurs. I tried to set up 2nd level KVM on a P9 machine with kvm_pr but I run into (this is the series on commands I used on P8 btw): $ sudo modprobe kvm_pr modprobe: ERROR: could not insert 'kvm_pr': Input/output error Unfortunately there is no dmesg message (not even with level set to debug) or anything like it, so I'm stuck asking if P9 does not work with kvm_pr at all or if there are other constraints one should know? Note: while no more a problem for kvm_hv on P9 I disabled SMT but the issue persists. Modinfo LGTM and matches the kernel: ubuntu@bionic-kvm:~$ modinfo kvm_pr filename: /lib/modules/4.15.0-23-generic/kernel/arch/powerpc/kvm/kvm-pr.ko alias: devname:kvm alias: char-major-10-232 license:GPL srcversion: CE18B50FD03CB9D9C432700 depends:kvm intree: Y name: kvm_pr vermagic: 4.15.0-23-generic SMP mod_unload mprofile-kernel signat: PKCS#7 signer: sig_key: sig_hashalgo: md4 ubuntu@bionic-kvm:~$ uname -a Linux bionic-kvm 4.15.0-23-generic #25-Ubuntu SMP Wed May 23 17:59:00 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux It feels more that I'm missing something than a bug, but in that case I have to ask what it is. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1778854 Title: kvm_pr on power9 not loadable Status in The Ubuntu-power-systems project: Triaged Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in qemu source package in Bionic: Invalid Bug description: Hi, this might be the worst bug report ever, but there just isn't a lot more info available when the issue occurs. I tried to set up 2nd level KVM on a P9 machine with kvm_pr but I run into (this is the series on commands I used on P8 btw): $ sudo modprobe kvm_pr modprobe: ERROR: could not insert 'kvm_pr': Input/output error Unfortunately there is no dmesg message (not even with level set to debug) or anything like it, so I'm stuck asking if P9 does not work with kvm_pr at all or if there are other constraints one should know? Note: while no more a problem for kvm_hv on P9 I disabled SMT but the issue persists. Modinfo LGTM and matches the kernel: ubuntu@bionic-kvm:~$ modinfo kvm_pr filename: /lib/modules/4.15.0-23-generic/kernel/arch/powerpc/kvm/kvm-pr.ko alias: devname:kvm alias: char-major-10-232 license:GPL srcversion: CE18B50FD03CB9D9C432700 depends:kvm intree: Y name: kvm_pr vermagic: 4.15.0-23-generic SMP mod_unload mprofile-kernel signat: PKCS#7 signer: sig_key: sig_hashalgo: md4 ubuntu@bionic-kvm:~$ uname -a Linux bionic-kvm 4.15.0-23-generic #25-Ubuntu SMP Wed May 23 17:59:00 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux It feels more that I'm missing something than a bug, but in that case I have to ask what it is. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1778854/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
