Additional official distribution-config evidence for this existing report: I independently reached the same configuration question while comparing current x86_64 distribution kernel configs. I am adding the evidence here instead of opening a duplicate bug.
The following official Ubuntu release configurations all contain: # CONFIG_MITIGATION_GDS is not set Observed releases: * Ubuntu 24.04 Noble HWE, 6.17.0-35-generic * Ubuntu 25.10 Questing, 6.17.0-40-generic * Ubuntu 26.04 Resolute, 7.0.0-27-generic The current Resolute configuration therefore shows that the setting persists on the 7.0 kernel line rather than being limited to one older HWE build. In a dependency-aware comparison, all 12 independent current x86_64 peer configuration sources with a known value enable CONFIG_MITIGATION_GDS. Ubuntu/Mint, Debian/Kali, and Alma/Rocky were each collapsed to one vote where they share an effective configuration source, so related distributions were not allowed to inflate the majority. One symbol-history detail may be useful when reviewing the policy. The older CONFIG_MITIGATION_GDS_FORCE=n only avoided force-disabling AVX on systems without suitable microcode. The newer CONFIG_MITIGATION_GDS=n is the top-level mitigation switch itself. Linux v7.0 describes the latter as a default-y option that enables mitigation for Gather Data Sampling: https://github.com/torvalds/linux/blob/v7.0/arch/x86/Kconfig#L2566-L2574 This comment does not add a new hardware reproduction; the original report already contains stronger machine-level evidence, including the result with gather_data_sampling=force. It only adds release persistence, cross-distribution context, and the distinction between the old FORCE option and the current top-level option. Could the Ubuntu kernel team confirm whether CONFIG_MITIGATION_GDS=n on the current Resolute kernel is intentional, and whether the older AVX compatibility rationale is intended to apply to this newer top-level switch? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2154728 Title: GDS mitigation not enabled in Ubuntu kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2154728/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
