From nobody Mon Feb 9 23:57:47 2026 Received: from szxga07-in.huawei.com (szxga07-in.huawei.com [45.249.212.35]) (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 BEF43374F1 for ; Sat, 13 Jul 2024 06:13:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.35 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720851224; cv=none; b=VPkNdax73S6WBUxPeCQDNFVxt0uKV83ghSI9coPF7NycVSyhq9qAtZSLGsuKbOo8sUQEGG34kyUwOXQv3iUCwkNOmriFJ1i+yW7HDduYxZwCewkO2gtdSB9zWvfBieVjSnbCdPr3zJ+TeNLlxts2uuIa0G/KHqQ90Zbt3RA1ATo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720851224; c=relaxed/simple; bh=c2a+MUNNmJv4IziUEEbzft8eTTiPu1rIEDhOjFqvxsA=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=KLckjMnt2arKCiDto2C4/8aFhwelUH7h/Gj+YYOrZVULSjKhvj21eSapgPKNCmW3FnqnZ5mKH0T/iz9ZG1HCjO8mvMgHb/i3bytYPfjhtdSPwly1W1YImTGc5mSLNSfdsODeWvCcw1lb0Gj1ZOYpWJjkn908N1/R0jtUlKAfMtw= 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=45.249.212.35 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 [172.19.88.214]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4WLdMf3HwNz1X4dH; Sat, 13 Jul 2024 14:09:18 +0800 (CST) Received: from kwepemf100008.china.huawei.com (unknown [7.202.181.222]) by mail.maildlp.com (Postfix) with ESMTPS id B316D1A016C; 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 14:13:33 +0800 From: Zeng Heng To: CC: , Subject: [PATCH v6.10-rc1 2/4] arm_mpam: Fix the range calculation of the implemented bits Date: Sat, 13 Jul 2024 14:09:42 +0800 Message-ID: <20240713060944.2725647-3-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" The implemented bits of the MAX field in the MPAMCFG_{MBW_MAX, CMAX} register are always to the left of the field, so the validated range should be like [15, 15 - width + 1]. 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 a217f2e1f350..e87fca6fc5fd 100644 --- a/drivers/platform/arm64/mpam/mpam_resctrl.c +++ b/drivers/platform/arm64/mpam/mpam_resctrl.c @@ -585,7 +585,7 @@ static u16 percent_to_mbw_max(u8 pc, struct mpam_props = *cprops) break; } =20 - value &=3D GENMASK(15, 15 - cprops->bwa_wd); + value &=3D GENMASK(15, 15 - cprops->bwa_wd + 1); =20 return value; } --=20 2.25.1