Actually no. It builds and does not have any downsides, but does not resolve the issue. Sorry for that. When I looked at the history of cpu_map and this patch, I did not see that it would require further patches to actually make it work.
So that would leave it at these four patches: Add-pschange-mc-no-bit-in-IA32_ARCH_CAPABILITIES-MSR.patch Request-test-files-update-when-adding-x86-features.patch Add-missing-x86-features-in-0x7-CPUID-leaf.patch Add-missing-x86-features-in-0x80000008-CPUID-leaf.patch Add-missing-AMD-SVM-features.patch Plus the patch adding the EPYC-Rome model. I'll try to get it upstream, but it will take some time. From my side, it's totally fine from my side to go ahead with the update without it. My patch queue for qemu also has 2 more patches, reported as LP#1896751 and LP#1896751 -- 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/1887490 Title: Add/Backport EPYC-v3 and EPYC-Rome CPU model Status in libvirt package in Ubuntu: Incomplete Status in linux package in Ubuntu: Invalid Status in qemu package in Ubuntu: Fix Released Status in libvirt source package in Focal: Incomplete Status in linux source package in Focal: Fix Committed Status in qemu source package in Focal: Incomplete Bug description: Qemu in focal has already support for most (except amd-stibp) flags of this model. Please backport the following patches: https://github.com/qemu/qemu/commit/a16e8dbc043720abcb37fc7dca313e720b4e0f0c https://github.com/qemu/qemu/commit/143c30d4d346831a09e59e9af45afdca0331e819 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1887490/+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
