From patchwork Thu Feb 6 21:56:55 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mario Limonciello X-Patchwork-Id: 863198 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 EE19F239062; Thu, 6 Feb 2025 21:57:26 +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=1738879047; cv=none; b=AsatlGVIGMAHFOSP0849ij4TcdCAx4jL3p2/752JP27bo+X+d2qCVSF+PNynuxA60mrNK/o45hbLnlABmncw/XtFxV8QIyxd2Uo1Bfvy2hApXvS8qtsQOQ2pi6XUnR2tzfwnKbea27/GNHx9ijHatRdVPnhBPtkq6Q2dBy65aBc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738879047; c=relaxed/simple; bh=knsunVTn/LakDXYBTLpd5X3vn52QfjdyZ5aNCI49rcM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=g+FzdC8xSpC9tErHK040DVfmfFanL3nZHi2/T1xeA3r1O1vahc4K8mWjEeAexmiSK71s0SisxteYktPy7Y1l9gQ/qdIJZPBr7CEkzaCGhmswDAefcCJJag9qb6OSD4Nwbg8I8j4IzRnnnjIkwH/ZGrWKctmYowjUfXQJ/9HCqes= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ANGVk7QE; 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="ANGVk7QE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CABFBC4CEE2; Thu, 6 Feb 2025 21:57:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738879046; bh=knsunVTn/LakDXYBTLpd5X3vn52QfjdyZ5aNCI49rcM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ANGVk7QE6J8vgUHdXUrE5BwPettdNppG02uBdObkE50eKm9FI8n6DJtwhMZmI0sGp fYwrLxJH392jpct9+SYG8JTDnIt9VzpM8UhPafn5Yq888T9lYFumPd2dbrJaZ3MNKN d2GH8QR/I9Fh89IqhLNVOVrWbtrk3IUEryDfZ1qLwJCIZpoZ7N/cTiCudx4hYSrMhe PUPqLvTQiE+77cbX60xfNpiC2u/zXbZMZkxs8bEt3wW64ifnJWoR2F4PMpaAYMlq3L al2su48DZGf2FyYxPrS/6Qf4UAmvp55Hrm8oCF7ok3jgA8jlC9NHP117HNQV0vdixf bNPav5U/b9w7w== From: Mario Limonciello To: "Gautham R . Shenoy" , Perry Yuan Cc: Dhananjay Ugwekar , 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 Subject: [PATCH 10/14] cpufreq/amd-pstate: Update cppc_req_cached for shared mem EPP writes Date: Thu, 6 Feb 2025 15:56:55 -0600 Message-ID: <20250206215659.3350066-11-superm1@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250206215659.3350066-1-superm1@kernel.org> References: <20250206215659.3350066-1-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 On EPP only writes update the cached variable so that the min/max performance controls don't need to be updated again. Signed-off-by: Mario Limonciello Reviewed-by: Dhananjay Ugwekar --- 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 e66ccfce5893f..754f2d606b371 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -338,6 +338,7 @@ static int shmem_set_epp(struct cpufreq_policy *policy, u8 epp) { struct amd_cpudata *cpudata = policy->driver_data; struct cppc_perf_ctrls perf_ctrls; + u64 value; int ret; lockdep_assert_held(&cpudata->lock); @@ -366,6 +367,11 @@ static int shmem_set_epp(struct cpufreq_policy *policy, u8 epp) } WRITE_ONCE(cpudata->epp_cached, epp); + value = READ_ONCE(cpudata->cppc_req_cached); + value &= ~AMD_CPPC_EPP_PERF_MASK; + value |= FIELD_PREP(AMD_CPPC_EPP_PERF_MASK, epp); + WRITE_ONCE(cpudata->cppc_req_cached, value); + return ret; }