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From: Mario Limonciello <superm1@kernel.org>
To: "Gautham R . Shenoy" <gautham.shenoy@amd.com>,
	Perry Yuan <perry.yuan@amd.com>
Cc: Dhananjay Ugwekar <Dhananjay.Ugwekar@amd.com>,
	linux-kernel@vger.kernel.org (open list:X86 ARCHITECTURE (32-BIT
	AND 64-BIT)),
	linux-pm@vger.kernel.org (open list:CPU FREQUENCY SCALING
	FRAMEWORK), Mario Limonciello <mario.limonciello@amd.com>,
	Dhananjay Ugwekar <dhananjay.ugwekar@amd.com>
Subject: [PATCH v5 06/19] cpufreq/amd-pstate: Drop `cppc_cap1_cached`
Date: Wed, 26 Feb 2025 01:49:21 -0600	[thread overview]
Message-ID: <20250226074934.1667721-7-superm1@kernel.org> (raw)
In-Reply-To: <20250226074934.1667721-1-superm1@kernel.org>

From: Mario Limonciello <mario.limonciello@amd.com>

The `cppc_cap1_cached` variable isn't used at all, there is no
need to read it at initialization for each CPU.

Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Reviewed-by: Dhananjay Ugwekar <dhananjay.ugwekar@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
 drivers/cpufreq/amd-pstate.c | 5 -----
 drivers/cpufreq/amd-pstate.h | 2 --
 2 files changed, 7 deletions(-)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 95b77cf145174..2cec8d7d92f51 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -1514,11 +1514,6 @@ static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy)
 		if (ret)
 			return ret;
 		WRITE_ONCE(cpudata->cppc_req_cached, value);
-
-		ret = rdmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_CAP1, &value);
-		if (ret)
-			return ret;
-		WRITE_ONCE(cpudata->cppc_cap1_cached, value);
 	}
 	ret = amd_pstate_set_epp(cpudata, cpudata->epp_default);
 	if (ret)
diff --git a/drivers/cpufreq/amd-pstate.h b/drivers/cpufreq/amd-pstate.h
index 83532a0079a81..1557e1afea79c 100644
--- a/drivers/cpufreq/amd-pstate.h
+++ b/drivers/cpufreq/amd-pstate.h
@@ -76,7 +76,6 @@ struct amd_aperf_mperf {
  * 		  AMD P-State driver supports preferred core featue.
  * @epp_cached: Cached CPPC energy-performance preference value
  * @policy: Cpufreq policy value
- * @cppc_cap1_cached Cached MSR_AMD_CPPC_CAP1 register value
  *
  * The amd_cpudata is key private data for each CPU thread in AMD P-State, and
  * represents all the attributes and goals that AMD P-State requests at runtime.
@@ -105,7 +104,6 @@ struct amd_cpudata {
 	/* EPP feature related attributes*/
 	u8	epp_cached;
 	u32	policy;
-	u64	cppc_cap1_cached;
 	bool	suspended;
 	u8	epp_default;
 };
-- 
2.43.0


  parent reply	other threads:[~2025-02-26  7:49 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-02-26  7:49 [PATCH v5 00/19] amd-pstate cleanups Mario Limonciello
2025-02-26  7:49 ` [PATCH v5 01/19] cpufreq/amd-pstate: Invalidate cppc_req_cached during suspend Mario Limonciello
2025-02-26  7:49 ` [PATCH v5 02/19] cpufreq/amd-pstate: Show a warning when a CPU fails to setup Mario Limonciello
2025-03-18  7:58   ` Paul Menzel
2025-02-26  7:49 ` [PATCH v5 03/19] cpufreq/amd-pstate: Drop min and max cached frequencies Mario Limonciello
2025-02-26  7:49 ` [PATCH v5 04/19] cpufreq/amd-pstate: Move perf values into a union Mario Limonciello
2025-02-27 12:59   ` kernel test robot
2025-02-27 20:09     ` Mario Limonciello
2025-03-01  7:02   ` Dhananjay Ugwekar
2025-02-26  7:49 ` [PATCH v5 05/19] cpufreq/amd-pstate: Overhaul locking Mario Limonciello
2025-02-26  7:49 ` Mario Limonciello [this message]
2025-02-26  7:49 ` [PATCH v5 07/19] cpufreq/amd-pstate-ut: Use _free macro to free put policy Mario Limonciello
2025-02-26  7:49 ` [PATCH v5 08/19] cpufreq/amd-pstate-ut: Allow lowest nonlinear and lowest to be the same Mario Limonciello
2025-02-26  7:49 ` [PATCH v5 09/19] cpufreq/amd-pstate-ut: Drop SUCCESS and FAIL enums Mario Limonciello
2025-02-26  7:49 ` [PATCH v5 10/19] cpufreq/amd-pstate-ut: Run on all of the correct CPUs Mario Limonciello
2025-02-26  7:49 ` [PATCH v5 11/19] cpufreq/amd-pstate-ut: Adjust variable scope Mario Limonciello
2025-02-26  7:49 ` [PATCH v5 12/19] cpufreq/amd-pstate: Replace all AMD_CPPC_* macros with masks Mario Limonciello
2025-02-26  7:49 ` [PATCH v5 13/19] cpufreq/amd-pstate: Cache CPPC request in shared mem case too Mario Limonciello
2025-02-26  7:49 ` [PATCH v5 14/19] cpufreq/amd-pstate: Move all EPP tracing into *_update_perf and *_set_epp functions Mario Limonciello
2025-02-26  7:49 ` [PATCH v5 15/19] cpufreq/amd-pstate: Update cppc_req_cached for shared mem EPP writes Mario Limonciello
2025-02-26  7:49 ` [PATCH v5 16/19] cpufreq/amd-pstate: Drop debug statements for policy setting Mario Limonciello
2025-02-26  7:49 ` [PATCH v5 17/19] cpufreq/amd-pstate: Rework CPPC enabling Mario Limonciello
2025-03-01  7:03   ` Dhananjay Ugwekar
2025-03-04  5:08   ` Gautham R. Shenoy
2025-02-26  7:49 ` [PATCH v5 18/19] cpufreq/amd-pstate: Stop caching EPP Mario Limonciello
2025-02-26  7:49 ` [PATCH v5 19/19] cpufreq/amd-pstate: Drop actions in amd_pstate_epp_cpu_offline() Mario Limonciello
2025-03-04  5:11   ` Gautham R. Shenoy

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