From nobody Tue Feb 10 04:02:46 2026 Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) (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 EF59929401 for ; Sat, 13 Jul 2024 06:13:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.189 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720851219; cv=none; b=Ds9zH+6YC3kldItXWbEBz64RgexesMGM6z6qhEgAxJf0sq4r9th+7ig4/g9AtO+w3xObNjRd+L7RspyZokYKmvRT1jAcx+Ef9g/FtPgeGwtlMOz2yKd3AK20+9p7XYGmnlNfeOtg6u70TZjYEl/XQwLGiWrx1SCqyqzMJPcineY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720851219; c=relaxed/simple; bh=/FwUgcdl80YqwSBVtTSXOnlfHZUrYZbOTEATrkgSxTI=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=GzuvZK55Sd6DIJlDuLz8LDE/QZlaEDa2qhgmfU+9YRpvEHvWziR7hSGcUdyssIMnTX0/CEmMBxAT9CNrVobSSCciOI6PC8DQn3rNMpSgofaouYp3lW2Nx5vw1bGJWGbVdYimKD150P+SUXYbSmzZmXfrXp8I1nhnikWVvw+Ce/M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.189 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.194]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4WLdMy2fxgzQlSJ; Sat, 13 Jul 2024 14:09:34 +0800 (CST) Received: from kwepemf100008.china.huawei.com (unknown [7.202.181.222]) by mail.maildlp.com (Postfix) with ESMTPS id 44C87140361; Sat, 13 Jul 2024 14:13:33 +0800 (CST) Received: from huawei.com (10.175.103.91) by kwepemf100008.china.huawei.com (7.202.181.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Sat, 13 Jul 2024 14:13:32 +0800 From: Zeng Heng To: CC: , Subject: [PATCH v6.10-rc1 1/4] arm_mpam: Correct MBA granularity calculation Date: Sat, 13 Jul 2024 14:09:41 +0800 Message-ID: <20240713060944.2725647-2-zengheng4@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240713060944.2725647-1-zengheng4@huawei.com> References: <20240713060944.2725647-1-zengheng4@huawei.com> 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 X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To kwepemf100008.china.huawei.com (7.202.181.222) Content-Type: text/plain; charset="utf-8" Correct MBA granularity calculation function. As said in the comments, "bwa_wd is the number of bits implemented in the 0.xxx fixed point fraction". Fixes: 867471fefd5c ("SPLIT untested: arm_mpam: resctrl: Add support for MB= resource") Signed-off-by: Zeng Heng --- drivers/platform/arm64/mpam/mpam_resctrl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/platform/arm64/mpam/mpam_resctrl.c b/drivers/platform/= arm64/mpam/mpam_resctrl.c index 2fa732a42d4f..a217f2e1f350 100644 --- a/drivers/platform/arm64/mpam/mpam_resctrl.c +++ b/drivers/platform/arm64/mpam/mpam_resctrl.c @@ -523,7 +523,7 @@ static u32 get_mba_granularity(struct mpam_props *cprop= s) * bwa_wd is the number of bits implemented in the 0.xxx * fixed point fraction. 1 bit is 50%, 2 is 25% etc. */ - return MAX_MBA_BW / (cprops->bwa_wd + 1); + return MAX_MBA_BW / (1 << cprops->bwa_wd); } =20 return 0; --=20 2.25.1