| Message ID | 20240430083706.69641-1-Dhananjay.Ugwekar@amd.com |
|---|---|
| State | New |
| Headers | show |
| Series | tools/power/cpupower: Fix Pstate frequency reporting on AMD Family 1Ah CPUs | expand |
On 4/30/2024 03:37, Dhananjay Ugwekar wrote: > Update cpupower's P-State frequency calculation and reporting with AMD > Family 1Ah+ processors, when using the acpi-cpufreq driver. This is due > to a change in the PStateDef MSR layout in AMD Family 1Ah+. > > [ dhananjay: commit log, tested on 4th and 5th Gen AMD EPYC system ] > > Signed-off-by: Ananth Narayan <Ananth.Narayan@amd.com> > Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@amd.com> Reviewed-by: Mario Limonciello <mario.limonciello@amd.com> > --- > tools/power/cpupower/utils/helpers/amd.c | 26 +++++++++++++++++++++--- > 1 file changed, 23 insertions(+), 3 deletions(-) > > diff --git a/tools/power/cpupower/utils/helpers/amd.c b/tools/power/cpupower/utils/helpers/amd.c > index c519cc89c97f..0a56e22240fc 100644 > --- a/tools/power/cpupower/utils/helpers/amd.c > +++ b/tools/power/cpupower/utils/helpers/amd.c > @@ -41,6 +41,16 @@ union core_pstate { > unsigned res1:31; > unsigned en:1; > } pstatedef; > + /* since fam 1Ah: */ > + struct { > + unsigned fid:12; > + unsigned res1:2; > + unsigned vid:8; > + unsigned iddval:8; > + unsigned idddiv:2; > + unsigned res2:31; > + unsigned en:1; > + } pstatedef2; > unsigned long long val; > }; > > @@ -48,6 +58,10 @@ static int get_did(union core_pstate pstate) > { > int t; > > + /* Fam 1Ah onward do not use did */ > + if (cpupower_cpu_info.family >= 0x1A) > + return 0; > + > if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATEDEF) > t = pstate.pstatedef.did; > else if (cpupower_cpu_info.family == 0x12) > @@ -61,12 +75,18 @@ static int get_did(union core_pstate pstate) > static int get_cof(union core_pstate pstate) > { > int t; > - int fid, did, cof; > + int fid, did, cof = 0; > > did = get_did(pstate); > if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATEDEF) { > - fid = pstate.pstatedef.fid; > - cof = 200 * fid / did; > + if (cpupower_cpu_info.family >= 0x1A) { > + fid = pstate.pstatedef2.fid; > + if (fid > 0x0f) > + cof = (fid * 5); > + } else { > + fid = pstate.pstatedef.fid; > + cof = 200 * fid / did; > + } > } else { > t = 0x10; > fid = pstate.pstate.fid;
On 4/30/24 11:06, Mario Limonciello wrote: > On 4/30/2024 03:37, Dhananjay Ugwekar wrote: >> Update cpupower's P-State frequency calculation and reporting with AMD >> Family 1Ah+ processors, when using the acpi-cpufreq driver. This is due >> to a change in the PStateDef MSR layout in AMD Family 1Ah+. >> >> [ dhananjay: commit log, tested on 4th and 5th Gen AMD EPYC system ] >> >> Signed-off-by: Ananth Narayan <Ananth.Narayan@amd.com> >> Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@amd.com> > Reviewed-by: Mario Limonciello <mario.limonciello@amd.com> Thank you. Applied to git.kernel.org/pub/scm/linux/kernel/git/shuah/linux.git/log/ cpupower branch for Linux 6.10-rc1. I will include it in my pull request to Rafael. thanks -- Shuah
diff --git a/tools/power/cpupower/utils/helpers/amd.c b/tools/power/cpupower/utils/helpers/amd.c index c519cc89c97f..0a56e22240fc 100644 --- a/tools/power/cpupower/utils/helpers/amd.c +++ b/tools/power/cpupower/utils/helpers/amd.c @@ -41,6 +41,16 @@ union core_pstate { unsigned res1:31; unsigned en:1; } pstatedef; + /* since fam 1Ah: */ + struct { + unsigned fid:12; + unsigned res1:2; + unsigned vid:8; + unsigned iddval:8; + unsigned idddiv:2; + unsigned res2:31; + unsigned en:1; + } pstatedef2; unsigned long long val; }; @@ -48,6 +58,10 @@ static int get_did(union core_pstate pstate) { int t; + /* Fam 1Ah onward do not use did */ + if (cpupower_cpu_info.family >= 0x1A) + return 0; + if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATEDEF) t = pstate.pstatedef.did; else if (cpupower_cpu_info.family == 0x12) @@ -61,12 +75,18 @@ static int get_did(union core_pstate pstate) static int get_cof(union core_pstate pstate) { int t; - int fid, did, cof; + int fid, did, cof = 0; did = get_did(pstate); if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATEDEF) { - fid = pstate.pstatedef.fid; - cof = 200 * fid / did; + if (cpupower_cpu_info.family >= 0x1A) { + fid = pstate.pstatedef2.fid; + if (fid > 0x0f) + cof = (fid * 5); + } else { + fid = pstate.pstatedef.fid; + cof = 200 * fid / did; + } } else { t = 0x10; fid = pstate.pstate.fid;