On Sat, Jun 01 2024 at 09:06, Linux regression tracking (Thorsten Leemhuis) wrote: > On 31.05.24 10:42, Thomas Gleixner wrote: >> On Fri, May 31 2024 at 10:33, Thomas Gleixner wrote: > >> --- >> Subject: x86/topology/intel: Unlock CPUID before evaluating anything >> From: Thomas Gleixner <tglx@xxxxxxxxxxxxx> >> Date: Thu, 30 May 2024 17:29:18 +0200 >> >> Intel CPUs have a MSR bit to limit CPUID enumeration to leaf two. If this >> bit is set by the BIOS then CPUID evaluation including topology enumeration >> does not work correctly as the evaluation code does not try to analyze any >> leaf greater than two. >> [...] > > TWIMC, I noticed a bug report with a "12 × 12th Gen Intel® Core™ > i7-1255U" where the reporter also noticed a lot of messages like these: > > archlinux kernel: [Firmware Bug]: CPU4: Topology domain 1 shift 7 != 6 > archlinux kernel: [Firmware Bug]: CPU4: Topology domain 2 shift 7 != 6 > archlinux kernel: [Firmware Bug]: CPU4: Topology domain 3 shift 7 != 6 > > Asked the reporter to test this patch. For details see: > https://bugzilla.kernel.org/show_bug.cgi?id=218879 Won't help. See: https://lore.kernel.org/all/87plt26m2b.ffs@tglx/ Thanks, tglx
