On Mon, Sep 01 2025 at 17:04, K. Prateek Nayak wrote: > Unconditionally call cpu_parse_topology_ext() on AMD and Hygon > processors to first parse the topology using the XTOPOLOGY leaves > (0x80000026 / 0xb) before using the TOPOEXT leaf (0x8000001e). > > While at it, break down the single large comment in parse_topology_amd() > to better highlight the purpose of each CPUID leaf. > > Cc: stable@xxxxxxxxxxxxxxx # Only v6.9 and above; Depends on x86 topology rewrite > Link: https://lore.kernel.org/lkml/1529686927-7665-1-git-send-email-suravee.suthikulpanit@xxxxxxx/ [1] > Link: https://lore.kernel.org/lkml/20080818181435.523309000@xxxxxxxxxxxxxxxxxxxxx/ [2] > Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537 [3] > Suggested-by: Naveen N Rao (AMD) <naveen@xxxxxxxxxx> > Fixes: 3986a0a805e6 ("x86/CPU/AMD: Derive CPU topology from CPUID function 0xB when available") > Signed-off-by: K Prateek Nayak <kprateek.nayak@xxxxxxx> > --- > Changelog v4..v5: > > o Made a note on only targeting versions >= v6.9 for stable backports > since the fix depends on the x86 topology rewrite. (Boris) Shouldn't that be backported? I think so, so leave that v6.9 and above comment out. The stable folks will notice that it does not apply to pre 6.9 kernels and send you a nice email asking you to provide a solution for pre 6.9 stable kernels. Thanks, tglx
