From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 BEE5C370AF3; Tue, 8 Sep 2026 04:19:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788841185; cv=none; b=MkH6a421pktS/ilM7csOZnfMcPuXLEbdyWyfhr6IWzGPBVasbIF9MmhXHmZSwUCVaGjIhMn/l8r9XbwYMoGwkvF51LYyO1G5gulICnuNDTjFds5k1Og8v8L+c26WhKznCzn4dN7StuedlmrX3tEDmKFV1Dqp0SAefJLkUni8NkI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788841185; c=relaxed/simple; bh=lpZzYy/VdGBhiRlw842ZMFFoGDx1XZvt95G9BzAIUK4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=N7ojI41JhsEvygZ5FaU9C702pU8MbGk6prWTKripaM8jEvglBNxirlbp+DYAkb5hnsgmsRf8TEhZEUqyIBx+p4Zc2359ap6T9N3hph2bNCggJSE+DHHrUgGtn4FrZb4lWEnrzwoyGBrJgeZYoftzUW00O93N5rl9RlPOs/ML3hU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PDFzNtNm; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PDFzNtNm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E44731F00A3F; Tue, 8 Sep 2026 04:19:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788841183; bh=ltwDh5bKYcNkq1n5dZV/QwH3SJk32AnsNrJAoqNE1us=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=PDFzNtNmgPDRoa6yUo71gDD5jScfx7bF3JOKXf/irSVlcEq3BZHHeI0WPifA9Dg2k HG5qOo+UVTysLX/w1LrGny4UjvP0OOFDYgNTxB2+DHDl2q9eyc/YbLS3djsMl8LL3M 4KW/38AP7KMn+IKmHGTzwd+l8tlKjDYXl4SzKEmP320M0+qLF/3BZANC+2+oirKGLY +8o8p94vg/Ywz3i5GHFCOCoTrMD1BE+EX6d9O7iaOj9w2YF3Pguc0ytyIu5RfUx/FR 13unPSPoUGXbPE0VeTxFrani3khW0Qd9EI48v1X5j8NLeNYLu/9hvdUlQBx88w6bPh Mlm1UE5f9EBOA== From: "Mario Limonciello (AMD)" To: K Prateek Nayak Cc: Perry Yuan , 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), Vishal Badole , Richard Gong , "Mario Limonciello (AMD)" , Christian Ludloff Subject: [PATCH v2 3/3] cpufreq/amd-pstate: Show a warning if missing EPP tunings Date: Mon, 7 Sep 2026 23:19:35 -0500 Message-ID: <20260908041935.402116-4-superm1@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260908041935.402116-1-superm1@kernel.org> References: <20260908041935.402116-1-superm1@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit EPP tunings are going to be more important going forward. Show a warning if on a heterogenous platform without them. Suggested-by: Christian Ludloff Signed-off-by: Mario Limonciello (AMD) --- drivers/cpufreq/amd-pstate.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 543ec143efc94..7c1f8ca7b7f72 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -2390,8 +2390,12 @@ static void __init amd_pstate_init_epp_values(void) const struct x86_cpu_id *id = x86_match_cpu(amd_pstate_epp_soc_ids); const struct amd_pstate_epp_soc *soc; - if (!id || !id->driver_data) + if (!id || !id->driver_data) { + if (cpu_feature_enabled(X86_FEATURE_ZEN6) && + cpu_feature_enabled(X86_FEATURE_AMD_HTR_CORES)) + pr_warn_once("No EPP tunings found for platform\n"); return; + } soc = (const struct amd_pstate_epp_soc *)id->driver_data; -- 2.43.0