From patchwork Wed Feb 19 21:02:58 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mario Limonciello X-Patchwork-Id: 866651 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 9C0DC2586FF; Wed, 19 Feb 2025 21:03:31 +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=1739999011; cv=none; b=KART17M8FminrgyrrInbEMjjhZ75c1rB08AbDdny87mYUoENtjF1TgkyqArgoAB9SMy/NePdyIkuy6q8qGgG5aFNT5dkK5K6thLwYln2e+MXcWbxC01ilbPg/w/9NaRU91vIcuV59ctnK0G+PZF3CrhBT2jkXTp1MXt/GVzbOGc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739999011; c=relaxed/simple; bh=8MGNgWGo7RgeW78wzyjYJSurH7mhV2gZ9vlrH7ayfD0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pZ0MbTpJTVe0qMEWWWIpnjeMZHhRRpoDsQeMF3J9mIjBIW9rSuP3rE9hxTiyXt30CaZtEAVaYPep2SsQc/jWGbnA9NL9EUDgacQV1okjyOJXmmtrmnWIDCujnz4Ow8cjh3eznQK5+9dzJPQJja9wP3hXX+VCTrIPsRiD/+0TQEs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AW1o/nNZ; 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="AW1o/nNZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 62022C4CEDD; Wed, 19 Feb 2025 21:03:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1739999011; bh=8MGNgWGo7RgeW78wzyjYJSurH7mhV2gZ9vlrH7ayfD0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AW1o/nNZBOtzGoSDYRvnhulqzlqGKOOb7ohz3QGuxax0kfsIh1VGuUJjzJqEed6+7 E2bt8vwenQtzwtrLgFF+WhGcPq41RT/Ulc//t7oaq+mcdJsI1A5PmEngLGibEtQ/kX FoYEu9JAfUS+Moa3TfcizcMAgNBNFvCOhnQD1GxYqBB5TsJrA8M2DSNk0EnpZZ4Gyl 82uLGZFvJ4XRCM2lOnEl9cOqODbwyp1qpy66p+mOOL9cpFWRCQWkJSAT0xgpfvvoc8 qg5JsLRPbX77AwClczy6d1D+1/ildLAylttxgzTUBxT9sl4MpEZjqTLPbYDxcRsscy ptjkKhq3UYbgA== 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 , Dhananjay Ugwekar Subject: [PATCH v4 15/19] cpufreq/amd-pstate: Update cppc_req_cached for shared mem EPP writes Date: Wed, 19 Feb 2025 15:02:58 -0600 Message-ID: <20250219210302.442954-16-superm1@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250219210302.442954-1-superm1@kernel.org> References: <20250219210302.442954-1-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. Reviewed-by: Dhananjay Ugwekar Reviewed-by: Gautham R. Shenoy 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 da6c39564c9ea..3c87e7cde2a4d 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -336,6 +336,7 @@ 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; if (trace_amd_pstate_epp_perf_enabled()) { @@ -362,6 +363,11 @@ 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; }