From patchwork Tue Sep 3 20:36:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mario Limonciello X-Patchwork-Id: 825208 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 62E4D1D61AB; Tue, 3 Sep 2024 20:37:12 +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=1725395832; cv=none; b=IkGdVR49YpULHe5ezMuMTSDCf9qNlpU3BPrfbUBuVZxZjQlcOyrWNVUhW8r4gK/DhccR75Z4mGOqMHC+XVEJ65f5b9y5Op7kU60aIJgfYP0pLsIn+CUroFt8TDYVN6+4tz3gUMJAvSf4B2K+O8TrEsjdoA35miHf0XNg+P3q5gk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725395832; c=relaxed/simple; bh=N2GFaa3eJHSuP/iXB7Y6AJm4+p9aQEYX+joUCXAhIsc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MqaLgRC0f7lFW15fvID1X3KiLgJcB+xbcccR+k2Ti9HZLJMMLOnVrVZHMVN0o2xMQHbLiu0KnMLvo0tIs5qwTquhN+wHeaygdySwH2jV8R3a6pnEhKkiyjKN4oVu2SrdMSQC5FFV7HyuyzSwxGVgzynxZk/EdWI/2HnsjzA6kkw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=efGuMUl8; 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="efGuMUl8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EE8CCC4CEC8; Tue, 3 Sep 2024 20:37:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725395831; bh=N2GFaa3eJHSuP/iXB7Y6AJm4+p9aQEYX+joUCXAhIsc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=efGuMUl8biHaNzyy2SQl5XNl7C8ZCtrPtncUqRSYuETZgBI35tcP7CY4jXQ37pyRa Sa7ZWMxrQzbn/v7aB4Xvx7aFFGoQZ+ipjOopRJl7OZfjb/5Zvesv5y4AlLSM3OWvLa ud6g9iDRSGSw9/DOFcks0G3X45adG/wrQ8Z4qba0qA9dVPLzSVcHT/4Pspu+tqysGY BV/NzESS/ThENKCmheMfafRUzjI88f+VBOJzW++bsfTH3GoSVKmibA+o/p3sZMfTwq Vh5WuT/aMht6cVqmMOG3J1J5Gc84mm2D/dQZvD6g6MApmmwJgFTCiFqAf1bctILUh0 C5+ytqT6wxSug== 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 04/11] ACPI: CPPC: Drop check for non zero perf ratio Date: Tue, 3 Sep 2024 15:36:54 -0500 Message-ID: <20240903203701.2695040-5-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 perf_ratio is a u64 and SCHED_CAPACITY_SCALE is a larg number. Shifting by one will never have a zero value. Drop the check. Suggested-by: Gautham R. Shenoy Signed-off-by: Mario Limonciello Reviewed-by: Gautham R. Shenoy --- arch/x86/kernel/acpi/cppc.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/arch/x86/kernel/acpi/cppc.c b/arch/x86/kernel/acpi/cppc.c index 660cfeb6384ba..e65c77afab318 100644 --- a/arch/x86/kernel/acpi/cppc.c +++ b/arch/x86/kernel/acpi/cppc.c @@ -91,13 +91,8 @@ static void amd_set_max_freq_ratio(void) return; } - perf_ratio = div_u64(numerator * SCHED_CAPACITY_SCALE, nominal_perf); /* midpoint between max_boost and max_P */ - perf_ratio = (perf_ratio + SCHED_CAPACITY_SCALE) >> 1; - if (!perf_ratio) { - pr_debug("Non-zero highest/nominal perf values led to a 0 ratio\n"); - return; - } + perf_ratio = (div_u64(numerator * SCHED_CAPACITY_SCALE, nominal_perf) + SCHED_CAPACITY_SCALE) >> 1; freq_invariance_set_perf_ratio(perf_ratio, false); }