From patchwork Tue Sep 3 20:36:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mario Limonciello X-Patchwork-Id: 825207 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 684981D88A2; Tue, 3 Sep 2024 20:37:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725395834; cv=none; b=S4Y55a8uk2KvAkhIBo+JO9fxHKGpDfbbfpHJwdE7+U298DCoDc0tYlbYJiBPtV2LiCH+qkvUZGqoNewd6ZjVSr9latAcXH43CuRHc1TCVdpretQMtNrtP0Y2w6y8EXGdP5kU5ui5laDGh3Ou93VMhjZ2GMW3iHdWxSk7UxGtSzI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725395834; c=relaxed/simple; bh=72h3WUChhX1/hxEuoU38xiisjOiAcozzY3/6ch+SP44=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QXmS7lFc2pHLneQQcp/MSItfdxjg4iqNl2HzHIcHb3hhF6GS6iuWGAL3AkAF9soqX9R3A3642ACayPRaaRoLN37jvUIHx/mYvmY+E5E2Egm3diD9lbzlxxiHvT7uwPJstzxpOFiXyyKwj03i07r6Hi0SlvRoQ8DN4fvouw9oiHE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PqKrK4tz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PqKrK4tz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6BCB1C4CEC9; Tue, 3 Sep 2024 20:37:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725395834; bh=72h3WUChhX1/hxEuoU38xiisjOiAcozzY3/6ch+SP44=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PqKrK4tzVTxo/tdq7Ny46ILLN1twFPf9NC5Ma/ZEuJxtfWvw/21Oa1I0ZKaTEJ57c WZOtG/k5X5BLWxv+umpIcSFGuGXxfj/+Q4YArTOmepttzz22PfoZpzhjXK/cF2LjQA 2FO+fo5tZHiDQaT2YL6MxUrDQM2bcIKLm1+ONlTGaMDCoYHDu2w2P3UoMZY5WoiTrd 2l2ZUvpiZSoP0rZqE9mRkyrolTUiPW1EjO+YtU15BClSHhBVBJuLSu3xWScQlsWUUt tyoxyd7NuG5ewiTDEC2dzVEr6i34sH3wCpAxOJJIROmU2Fj2f39fTCuXBBVJYam8O6 zMab2ZyJHhfyA== From: Mario Limonciello To: Borislav Petkov , "Gautham R . Shenoy" , Perry Yuan Cc: x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)), "Rafael J . Wysocki" , linux-kernel@vger.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)), linux-acpi@vger.kernel.org (open list:ACPI), linux-pm@vger.kernel.org (open list:CPU FREQUENCY SCALING FRAMEWORK), Mario Limonciello Subject: [PATCH v2 06/11] x86/amd: Move amd_get_highest_perf() out of amd-pstate Date: Tue, 3 Sep 2024 15:36:56 -0500 Message-ID: <20240903203701.2695040-7-superm1@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240903203701.2695040-1-superm1@kernel.org> References: <20240903203701.2695040-1-superm1@kernel.org> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Mario Limonciello amd_pstate_get_highest_perf() is a helper used to get the highest perf value on AMD systems. It's used in amd-pstate as part of preferred core handling, but applicable for acpi-cpufreq as well. Move it out to cppc handling code as amd_get_highest_perf(). Reviewed-by: Perry Yuan Reviewed-by: Gautham R. Shenoy Signed-off-by: Mario Limonciello --- v1->v2: * Update commit message (Gautham) --- arch/x86/kernel/acpi/cppc.c | 30 ++++++++++++++++++++++++++++++ drivers/cpufreq/amd-pstate.c | 34 ++-------------------------------- include/acpi/cppc_acpi.h | 5 +++++ 3 files changed, 37 insertions(+), 32 deletions(-) diff --git a/arch/x86/kernel/acpi/cppc.c b/arch/x86/kernel/acpi/cppc.c index f0328ce98a8fe..a75dcb382c786 100644 --- a/arch/x86/kernel/acpi/cppc.c +++ b/arch/x86/kernel/acpi/cppc.c @@ -116,6 +116,36 @@ void init_freq_invariance_cppc(void) mutex_unlock(&freq_invariance_lock); } +/* + * Get the highest performance register value. + * @cpu: CPU from which to get highest performance. + * @highest_perf: Return address for highest performance value. + * + * Return: 0 for success, negative error code otherwise. + */ +int amd_get_highest_perf(unsigned int cpu, u32 *highest_perf) +{ + u64 val; + int ret; + + if (cpu_feature_enabled(X86_FEATURE_CPPC)) { + ret = rdmsrl_safe_on_cpu(cpu, MSR_AMD_CPPC_CAP1, &val); + if (ret) + goto out; + + val = AMD_CPPC_HIGHEST_PERF(val); + } else { + ret = cppc_get_highest_perf(cpu, &val); + if (ret) + goto out; + } + + WRITE_ONCE(*highest_perf, (u32)val); +out: + return ret; +} +EXPORT_SYMBOL_GPL(amd_get_highest_perf); + /** * amd_get_boost_ratio_numerator: Get the numerator to use for boost ratio calculation * @cpu: CPU to get numerator for. diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index db4f747f128f1..44df6ef66b5fa 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -803,36 +803,6 @@ static void amd_pstste_sched_prefcore_workfn(struct work_struct *work) } static DECLARE_WORK(sched_prefcore_work, amd_pstste_sched_prefcore_workfn); -/* - * Get the highest performance register value. - * @cpu: CPU from which to get highest performance. - * @highest_perf: Return address. - * - * Return: 0 for success, -EIO otherwise. - */ -static int amd_pstate_get_highest_perf(int cpu, u32 *highest_perf) -{ - int ret; - - if (cpu_feature_enabled(X86_FEATURE_CPPC)) { - u64 cap1; - - ret = rdmsrl_safe_on_cpu(cpu, MSR_AMD_CPPC_CAP1, &cap1); - if (ret) - return ret; - WRITE_ONCE(*highest_perf, AMD_CPPC_HIGHEST_PERF(cap1)); - } else { - u64 cppc_highest_perf; - - ret = cppc_get_highest_perf(cpu, &cppc_highest_perf); - if (ret) - return ret; - WRITE_ONCE(*highest_perf, cppc_highest_perf); - } - - return (ret); -} - #define CPPC_MAX_PERF U8_MAX static void amd_pstate_init_prefcore(struct amd_cpudata *cpudata) @@ -840,7 +810,7 @@ static void amd_pstate_init_prefcore(struct amd_cpudata *cpudata) int ret, prio; u32 highest_perf; - ret = amd_pstate_get_highest_perf(cpudata->cpu, &highest_perf); + ret = amd_get_highest_perf(cpudata->cpu, &highest_perf); if (ret) return; @@ -879,7 +849,7 @@ static void amd_pstate_update_limits(unsigned int cpu) if ((!amd_pstate_prefcore) || (!cpudata->hw_prefcore)) goto free_cpufreq_put; - ret = amd_pstate_get_highest_perf(cpu, &cur_high); + ret = amd_get_highest_perf(cpu, &cur_high); if (ret) goto free_cpufreq_put; diff --git a/include/acpi/cppc_acpi.h b/include/acpi/cppc_acpi.h index 97861abc5f5b8..f7c7abf2a95e9 100644 --- a/include/acpi/cppc_acpi.h +++ b/include/acpi/cppc_acpi.h @@ -159,6 +159,7 @@ extern int cppc_get_epp_perf(int cpunum, u64 *epp_perf); extern int cppc_set_epp_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls, bool enable); extern int cppc_get_auto_sel_caps(int cpunum, struct cppc_perf_caps *perf_caps); extern int cppc_set_auto_sel(int cpu, bool enable); +extern int amd_get_highest_perf(unsigned int cpu, u32 *highest_perf); extern int amd_get_boost_ratio_numerator(unsigned int cpu, u64 *numerator); #else /* !CONFIG_ACPI_CPPC_LIB */ static inline int cppc_get_desired_perf(int cpunum, u64 *desired_perf) @@ -233,6 +234,10 @@ static inline int cppc_get_auto_sel_caps(int cpunum, struct cppc_perf_caps *perf { return -EOPNOTSUPP; } +static inline int amd_get_highest_perf(unsigned int cpu, u32 *highest_perf) +{ + return -ENODEV; +} static inline int amd_get_boost_ratio_numerator(unsigned int cpu, u64 *numerator) { return -EOPNOTSUPP;