From nobody Sun Feb 8 23:07:13 2026 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 F4087267397; Wed, 23 Apr 2025 01:47:17 +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=1745372838; cv=none; b=QRVXjiCvA/FCYS0rWygxZodpFgJtnl067ZoNTrSc9YPCwUduwyuKXr7vWH7lAHnQi6g4PhXji1Ng4eiPcd2kf3etM6Z7D6wWKpyzYeIP++G3vPWDhfKv0Qw3Wtnnz8lTFLRkJv5EnruZB9oLFRf7dkPLUN5P0qpeY3TVQZK5APs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745372838; c=relaxed/simple; bh=jwHq1Dgz4Xlf3NTJxaMhCnIsdmCBSmUIMBR+/cZEj8Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lvYqDd3yAFrGW8rFu1eb0sVR7ZFTcD7zZVxIthxp1H+iRaV4nRd4fSTZjcOqj5qPO9OBhPLol5czu4a2tLG/Q41goyuvQZ6DlJZStOn+GZUkrMUCuDhaxIR3c+aO0M+cS+puzOdz80/9mzDvPzzJp9iHbYON8l9V+QtAAmlfjvI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Q9zlEHHS; 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="Q9zlEHHS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 265DFC4CEEE; Wed, 23 Apr 2025 01:47:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1745372837; bh=jwHq1Dgz4Xlf3NTJxaMhCnIsdmCBSmUIMBR+/cZEj8Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q9zlEHHS3bTcTk4qBscHkj73WqGtH8TPxbF1tNqJ/n7tjc+Fik7Z1ssQK3eXGgNC/ Kv/RyNvQdggcY+67BDl4upe5wKIMrVM8PN+NFGe/A12joBbO4kVVRlTWwJTN0yJmXf aA/uzbJBJdSSyC2UwhkB6iIQJ0alm+ay+aWla6Q5/UXQfQX7oqMKssd1emBvUZWh/K +z7ZOXK1BQJsxbiEi8K2bLiQ8iYm+I2ptpHKWG8JCnAej+QanIEeG5daIyhXdbdYHw Tu7tAkdInzWoTKs/sc2gSONNvIvRC3gtQzVWO7lw2EY35+swaEXGK2f1y7XNH1DElY 8PcAqvfBvHqdA== From: Mario Limonciello To: Hans de Goede , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Cc: Mario Limonciello , Perry Yuan , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)), "H . Peter Anvin" , Jonathan Corbet , Huang Rui , "Gautham R . Shenoy" , "Rafael J . Wysocki" , Viresh Kumar , platform-driver-x86@vger.kernel.org (open list:AMD HETERO CORE HARDWARE FEEDBACK DRIVER), linux-kernel@vger.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)), linux-doc@vger.kernel.org (open list:DOCUMENTATION), linux-pm@vger.kernel.org (open list:AMD PSTATE DRIVER) Subject: [PATCH v9 10/13] cpufreq/amd-pstate: Disable preferred cores on designs with workload classification Date: Tue, 22 Apr 2025 20:46:28 -0500 Message-ID: <20250423014631.3224338-11-superm1@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250423014631.3224338-1-superm1@kernel.org> References: <20250423014631.3224338-1-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: quoted-printable Content-Type: text/plain; charset="utf-8" From: Mario Limonciello On designs that have workload classification, it's preferred that the amd-hfi driver is used to provide hints to the scheduler of which cores to use instead of the amd-pstate driver. Reviewed-by: Gautham R. Shenoy Reviewed-by: Perry Yuan Signed-off-by: Mario Limonciello --- drivers/cpufreq/amd-pstate.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 66fdc74f13ef4..bdaf2034aaa10 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -801,6 +801,12 @@ static void amd_pstate_init_prefcore(struct amd_cpudat= a *cpudata) /* user disabled or not detected */ if (!amd_pstate_prefcore) return; + /* should use amd-hfi instead */ + if (cpu_feature_enabled(X86_FEATURE_AMD_WORKLOAD_CLASS) && + IS_ENABLED(CONFIG_AMD_HFI)) { + amd_pstate_prefcore =3D false; + return; + } =20 cpudata->hw_prefcore =3D true; =20 --=20 2.43.0