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[78.94.0.50]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-388c801637esm14661029f8f.28.2024.12.18.11.00.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Dec 2024 11:00:32 -0800 (PST) From: Naresh Solanki To: Huang Rui , "Gautham R. Shenoy" , Mario Limonciello , Perry Yuan , "Rafael J. Wysocki" , Viresh Kumar , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Naresh Solanki Subject: [PATCH] cpufreq/amd-pstate: Refactor max frequency calculation Date: Thu, 19 Dec 2024 00:30:29 +0530 Message-ID: <20241218190030.1228868-1-naresh.solanki@9elements.com> X-Mailer: git-send-email 2.42.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Refactor to calculate max-freq more accurately. Signed-off-by: Naresh Solanki --- drivers/cpufreq/amd-pstate.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index d7630bab2516..78a2cbd14952 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -892,7 +892,7 @@ static int amd_pstate_init_freq(struct amd_cpudata *cpu= data) u64 numerator; u32 nominal_perf, nominal_freq; u32 lowest_nonlinear_perf, lowest_nonlinear_freq; - u32 boost_ratio, lowest_nonlinear_ratio; + u32 lowest_nonlinear_ratio; struct cppc_perf_caps cppc_perf; =20 ret =3D cppc_get_perf_caps(cpudata->cpu, &cppc_perf); @@ -914,8 +914,7 @@ static int amd_pstate_init_freq(struct amd_cpudata *cpu= data) ret =3D amd_get_boost_ratio_numerator(cpudata->cpu, &numerator); if (ret) return ret; - boost_ratio =3D div_u64(numerator << SCHED_CAPACITY_SHIFT, nominal_perf); - max_freq =3D (nominal_freq * boost_ratio >> SCHED_CAPACITY_SHIFT) * 1000; + max_freq =3D div_u64(numerator * nominal_freq * 1000, nominal_perf); =20 lowest_nonlinear_perf =3D READ_ONCE(cpudata->lowest_nonlinear_perf); lowest_nonlinear_ratio =3D div_u64(lowest_nonlinear_perf << SCHED_CAPACIT= Y_SHIFT, --=20 2.42.0