[Kernel-packages] [Bug 1954468] Re: KVM Architectural LBRs
[Expired for linux (Ubuntu) because there has been no activity for 60 days.] ** Changed in: linux (Ubuntu) Status: Incomplete => Expired -- 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/1954468 Title: KVM Architectural LBRs Status in linux package in Ubuntu: Expired Bug description: Architectural LBRs (Last Branch Records) Architectural LBRs (Last Branch Records) enable recording of software path history by logging taken branches and other control flow transfers within model-specific registers, and is inherited from legacy LBR. If CPUID.(EAX=07H, ECX=0):EDX[19] is set to 1, the processor supports Architectural LBRs. With VMCS support and XSAVE support, the KVM guests could also use ARCH LBR as well. Target Linux 5.17 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1954468/+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 1954468] Re: KVM Architectural LBRs
** Tags added: intel-bug-december-2021 -- 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/1954468 Title: KVM Architectural LBRs Status in linux package in Ubuntu: Incomplete Bug description: Architectural LBRs (Last Branch Records) Architectural LBRs (Last Branch Records) enable recording of software path history by logging taken branches and other control flow transfers within model-specific registers, and is inherited from legacy LBR. If CPUID.(EAX=07H, ECX=0):EDX[19] is set to 1, the processor supports Architectural LBRs. With VMCS support and XSAVE support, the KVM guests could also use ARCH LBR as well. Target Linux 5.17 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1954468/+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 1954468] Re: KVM Architectural LBRs
Hi Paul, Bugs in launchpad are filed against source packages, and "src:kvm" doesn't exist for more than 8 years now :-) Instead you'd want to file it against the package the code is in, in your case most likely src:qemu [1] or src:linux [2]. Also you should talk about the target Ubuntu release you want the fix to be in. I assume from the type of bug that you want to feature request for the coming LTS Ubuntu 22.04 - but please clarify to be sure. Finally referencing to features/commits works much better if you could please include the hashes of the commits. Please consider doing so once they exist upstream. If they are not existing there someone needs to provide the patches upfront and convince the team that they are stable enough to be picked up. The referred kernel version is in the future, so that might be a normal bug for a new feature. I'll re-assign this to src:linux for now as your bug indicates that is the target. [1]: https://bugs.launchpad.net/ubuntu/+source/qemu [2]: https://bugs.launchpad.net/ubuntu/+source/linux ** Package changed: kvm (Ubuntu) => linux (Ubuntu) -- 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/1954468 Title: KVM Architectural LBRs Status in linux package in Ubuntu: Incomplete Bug description: Architectural LBRs (Last Branch Records) Architectural LBRs (Last Branch Records) enable recording of software path history by logging taken branches and other control flow transfers within model-specific registers, and is inherited from legacy LBR. If CPUID.(EAX=07H, ECX=0):EDX[19] is set to 1, the processor supports Architectural LBRs. With VMCS support and XSAVE support, the KVM guests could also use ARCH LBR as well. Target Linux 5.17 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1954468/+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
