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Wysocki wrote: > On Wed, Feb 25, 2026 at 9:50 AM Pierre Gondois wrote: >> Drivers not using freq. tables update cpuinfo.max_freq in their >> .set_boost() callback. E.g. amd-pstate, cppc_cpufreq. >> Drivers relying on freq. tables and supporting boost frequencies >> rely on cpufreq_frequency_table_cpuinfo(). cpuinfo.max_freq is >> only updated if the new maximal value is higher than the previous >> one. >> >> Using the scmi-cpufreq driver which relies on freq. tables, enabling >> boost will permanently increases the cpuinfo.max_freq value. >> This patch allows to lower cpuinfo.max_freq. >> >> Note: >> commit 538b0188da46 ("cpufreq: ACPI: Set cpuinfo.max_freq directly >> if max boost is known") >> favored having cpuinfo.max_freq reporting the maximal boosted >> frequency of a CPU instead of the maximal reachable frequency >> due to regressions in the frequency reported by cpuinfo.max >> and scaling_cur_freq. >> As stated above, this is not what most of the other cpufreq driver >> do. I assume that the following patch: >> commit 3c55e94c0ade ("cpufreq: ACPI: Extend frequency tables to >> cover boost frequencies") >> was correct, but might not have tagged the boosted frequency with >> the CPUFREQ_BOOST_FREQ flag in the freq. table. >> >> Signed-off-by: Pierre Gondois >> --- >> drivers/cpufreq/freq_table.c | 7 +------ >> 1 file changed, 1 insertion(+), 6 deletions(-) >> >> diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c >> index 9b37f37c36389..bd08cbe9e9ba3 100644 >> --- a/drivers/cpufreq/freq_table.c >> +++ b/drivers/cpufreq/freq_table.c >> @@ -50,12 +50,7 @@ int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy) >> } >> >> policy->cpuinfo.min_freq = min_freq; >> - /* >> - * If the driver has set its own cpuinfo.max_freq above max_freq, leave >> - * it as is. >> - */ >> - if (policy->cpuinfo.max_freq < max_freq) >> - policy->cpuinfo.max_freq = max_freq; >> + policy->cpuinfo.max_freq = max_freq; >> >> if (min_freq == ~0) >> return -EINVAL; >> -- > How exactly does this change depend on the previous patches? Without it, the pattern in the cover letter: # ## Init scaling_max_freq:1000000 cpuinfo_max_freq:1000000 # echo 700000 > scaling_max_freq scaling_max_freq:700000 cpuinfo_max_freq:1000000 # echo 1 > ../boost scaling_max_freq:700000 cpuinfo_max_freq:1200000 # echo 800000 > scaling_max_freq scaling_max_freq:800000 cpuinfo_max_freq:1200000 # echo 0 > ../boost scaling_max_freq:800000 cpuinfo_max_freq:1000000 doesn't work when using the scmi-cpufreq driver