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Message-ID: <2f793cc8.a13d.19108df0a58.Coremail.00107082@163.com>
Date: Wed, 31 Jul 2024 20:58:40 +0800 (CST)
From: "David Wang" <00107082@....com>
To: "Gautham R.Shenoy" <gautham.shenoy@....com>
Cc: perry.yuan@....com, Alexander.Deucher@....com, Li.Meng@....com,
Mario.Limonciello@....com, Xiaojian.Du@....com, Xinmei.Huang@....com,
linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
rafael.j.wysocki@...el.com, viresh.kumar@...aro.org
Subject: Re: [Regression] 6.11.0-rc1: AMD CPU boot with error when CPPC
feature disabled by BIOS
Hi,
At 2024-07-31 18:12:12, "Gautham R.Shenoy" <gautham.shenoy@....com> wrote:
>Hello David,
>
>David Wang <00107082@....com> writes:
>
>> Hi,
>>
>> I notice some kernel warning and errors when I update to 6.11.0-rc1:
>>
>> kernel: [ 1.022739] amd_pstate: The CPPC feature is supported but currently disabled by the BIOS.
>> kernel: [ 1.022739] Please enable it if your BIOS has the CPPC option.
>> kernel: [ 1.098054] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect
>> kernel: [ 1.110058] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect
>> kernel: [ 1.122057] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect
>> kernel: [ 1.134062] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect
>> kernel: [ 1.134641] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect
>> kernel: [ 1.135128] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect
>> kernel: [ 1.135693] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect
>> kernel: [ 1.136371] amd_pstate: min_freq(0) or max_freq(0) or nominal_freq(0) value is incorrect
>> kernel: [ 1.136390] amd_pstate: failed to register with return -19
>> kernel: [ 1.138410] ledtrig-cpu: registered to indicate activity on CPUs
>>
>>
>> Those warning message was introduced by commit:
>> bff7d13c190ad98cf4f877189b022c75df4cb383 ("cpufreq: amd-pstate: add debug message while CPPC is supported and disabled by SBIOS)
>> , which make sense.
>
>
>If CPPC is disabed in the BIOS, then the _CPC objects shouldn't have
>been created. And the error message that you should have seen is
>"the _CPC object is not present in SBIOS or ACPI disabled".
>
>
>Could you please share the family and model number of the platform where
>you are observing this ?
My `cat /proc/cpuinfo` shows something as following:
processor : 0
vendor_id : AuthenticAMD
cpu family : 23
model : 113
model name : AMD Ryzen 3 3100 4-Core Processor
stepping : 0
microcode : 0x8701021
cpu MHz : 3600.000
cache size : 512 KB
physical id : 0
siblings : 8
core id : 0
cpu cores : 4
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 16
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es
bugs : sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed smt_rsb srso
bogomips : 7199.95
TLB size : 3072 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 43 bits physical, 48 bits virtual
power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
>
>--
>Thanks and Regards
>gautham.
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