From: bugzilla-daemon@kernel.org
To: linux-pm@vger.kernel.org
Subject: [Bug 218686] Fail to set energy_performance_preference of amd processor on asus ga403uv
Date: Thu, 11 Apr 2024 07:25:17 +0000 [thread overview]
Message-ID: <bug-218686-137361-okvIW7mdqm@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-218686-137361@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=218686
--- Comment #30 from al0uette@outlook.com ---
(In reply to xiaojian.du from comment #28)
> confirmed from another Phoenix 7840HS platform:
> CPPC flag is exposed by BIOS.
> So, on your 8945H CPU platform, it is very possible that ASUS doesn't enable
> the CPPC in the BIOS.
> I see this BIOS is built at 02/15/2024
> "DMI: ASUSTeK COMPUTER INC. ROG Zephyrus G14 GA403UV_GA403UV/GA403UV, BIOS
> GA403UV.303 02/15/2024"
>
> ~$ cat /proc/cpuinfo | grep cppc
> 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 amd_lbr_v2 nopl nonstop_tsc cpuid extd_apicid
> aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 x2apic
> 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 perfmon_v2 ibrs ibpb stibp ibrs_enhanced vmmcall fsgsbase
> bmi1 avx2 smep bmi2 erms invpcid cqm rdt_a avx512f avx512dq rdseed adx smap
> avx512ifma clflushopt clwb avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec
> xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local avx512_bf16
> clzero irperf xsaveerptr rdpru wbnoinvd **cppc** arat npt lbrv svm_lock
> nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter
> pfthreshold v_vmsave_vmload vgif x2avic v_spec_ctrl vnmi avx512vbmi umip pku
> ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg
> avx512_vpopcntdq rdpid overflow_recov succor smca fsrm flush_l1d
>
>
> BTW, suppose you're using a test kernel 6.9-rc built by yourslef,, need to
> check kernel building config file to enable msr support:
> make menucofnig -> Processor type and features -> <M>/dev/cpu/*/msr -
> Model-specific register support, change <M> to <*>
I've also confirmed this on prebuilt stable kernel from my distribution, so
it's not my config's problem.
But why CPPC works on Windows? Can we add something like a quirk to make CPPC
work on Linux for these machines?
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next prev parent reply other threads:[~2024-04-11 7:25 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-06 2:56 [Bug 218686] New: Fail to set energy_performance_preference of amd processor on asus ga403uv bugzilla-daemon
2024-04-08 1:48 ` [Bug 218686] " bugzilla-daemon
2024-04-10 3:36 ` bugzilla-daemon
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