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-- 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/1698844 Title: Fix /proc/cpuinfo revision for POWER9 DD2 Status in The Ubuntu-power-systems project: New Status in linux package in Ubuntu: New Bug description: == Comment: #0 - Breno Leitao <bren...@br.ibm.com> - 2017-06-19 09:44:36 == The P9 PVR bits 12-15 don't indicate a revision but instead different chip configurations. From BookIV we have: Bits Configuration 0 : Scale out 12 cores 1 : Scale out 24 cores 2 : Scale up 12 cores 3 : Scale up 24 cores DD1 doesn't use this but DD2 does. Linux will mostly use the "Scale out 24 core" configuration (ie. SMT4 not SMT8) which results in a PVR of 0x004e1200. The reported revision in /proc/cpuinfo is hence reported incorrectly as "18.0". This patch fixes this to mask off only the relevant bits for the major revision (ie. bits 8-11) for POWER9. Please cherry pick: https://patchwork.ozlabs.org/patch/776052/ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1698844/+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
