Re: [PATCH v3 00/15] ACPI: CPPC: Fix register access and lifetime bugs
"Rafael J. Wysocki (Intel)" <[email protected]>
| Newsgroups | org.kernel.vger.linux-pm,org.kernel.vger.linux-acpi,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <CAJZ5v0jJOQcikMV=dbnRh_S980g+QrQyL7wdP_0p-e3PmrQ6Vw@mail.gmail.com> |
On Tue, Aug 25, 2026 at 10:25 AM Christian Loehle <[email protected]> wrote: > [cut] > >>> base-commit: ea2bff00da89d7767d677bb68470130ba96f4928 > >> Gentle ping on this in particular to the CCs not involved in the merge window. > >> Even just a Tested-by: that the new CPC validation didn't break your platform would > >> be appreciated! > > > > Tested the series on linux-next-20260824. > > Thanks for testing, can you dump the CPC descriptors for both revisions? > > > > > With firmware reporting _CPC revision 3, every CPU logs: > > ACPI CPPC: CPU0: Performance Limited register cannot use an interlocked SystemMemory access > > ACPI CPPC: CPU0: ignoring inaccessible Performance Limited register > > Assuming the detection here this is expected. > > > > > cppc_cpufreq still probes and frequency scaling works, though > > perf_limited interface reads 0 rather than reporting the > > register as unsupported. > > Ack, I'll fix the getter. This means though that it will miss the 7.3 merge window mark and it will become 7.4 material.