From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 41EDAC369CB for ; Wed, 23 Apr 2025 13:52:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:References:CC:To:Subject:From:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=h9VplE0QC4aY1gR58x72U5ymrgJrPj0iCMqED0qOjtA=; b=cvzwfkbmcGhX45LfEQJZHjN73b sy93/U0ExpXcmxQYW7li+4Lx+BbEQTw0e9XecJXn7MJ6ZmHl8iQmtiMd82iquaVSxvZxhIhWkJZr8 d+aeLwA9fABer1/fBWfD7SzQ6m1dXIHkIDq1Hjde5JQA9FXDQY0QRFOYyd3OW3NSlHlqGoAkoScwM kNRnfuBU5Qkh7JdWF5Kw5dLKXszcGjUJjPaxfkjb6uvIItJK2C1EepTKEtb7WKHVObHSqvSsuur7t 8ldABxAoPToljW3Ubcmawos7MtadPUqVY++j9Pm3nywsxd1V6/BBp+Q60yMYWWdYuVw1TQVdwiaB2 Dv+tmN1Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1u7aWm-0000000AgpH-3v6H; Wed, 23 Apr 2025 13:52:40 +0000 Received: from mx0a-0031df01.pphosted.com ([205.220.168.131]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1u7ZxY-0000000AZx3-3bzX for linux-arm-kernel@lists.infradead.org; Wed, 23 Apr 2025 13:16:18 +0000 Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 53NAbjfZ011429; Wed, 23 Apr 2025 13:15:46 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= h9VplE0QC4aY1gR58x72U5ymrgJrPj0iCMqED0qOjtA=; b=epr/TzqLMbjdgAYb aqjECcYdB9xHMSlIJEnH+K2nZ9zREtawvRSPctcA4ZNZzuhSSZaWdUoV0GfwQ4Jr aqQfCmaeAca7jDw0/6FvtKZYappgVVgIyjImfMpGTpBdttd03vMHfQJR3jXxmoeO 04vgxOTtGMP43qZNq5K2P8LDMu+KSiCXPMKKvC/JW/wkUqYJmDtYXe+kzxw3Pf4U 4AJvywUUwVGcPdlJvxkKQSzIIBfKFfZWJroQdU2o8WeOhvSBQ/T7xtJXyfLpDaUp wZLpcpnMjS95LKl7uAmalekYmtRla7D78XVrGO9ThwghWxLB52FyXX9HwklWvv3c rlMosg== Received: from nasanppmta03.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 466jh1j87e-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 23 Apr 2025 13:15:46 +0000 (GMT) Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA03.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 53NDFkAl018230 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 23 Apr 2025 13:15:46 GMT Received: from [10.253.74.233] (10.80.80.8) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Wed, 23 Apr 2025 06:15:40 -0700 Message-ID: <2b7ca78e-18f8-41bf-979d-8d502f6f8fe1@quicinc.com> Date: Wed, 23 Apr 2025 21:15:37 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Jie Luo Subject: Re: [PATCH v3 3/6] arm64: tlb: Convert the opencoded field modify To: "Russell King (Oracle)" CC: Yury Norov , Rasmus Villemoes , Julia Lawall , "Nicolas Palix" , Catalin Marinas , Will Deacon , Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , , , , , , , , , , References: <20250417-field_modify-v3-0-6f7992aafcb7@quicinc.com> <20250417-field_modify-v3-3-6f7992aafcb7@quicinc.com> Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: Zr3M8IAXwgtXp3BYAbPXMxX0KvqkQhtU X-Proofpoint-ORIG-GUID: Zr3M8IAXwgtXp3BYAbPXMxX0KvqkQhtU X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNDIzMDA5MiBTYWx0ZWRfX7P6/H5f+henI G7IlHjHppUVsUsuEJVmbat7/+Zqx6yiHfDal02OxGIrVvJzemA80dkzmPAEpN5koc02+DO9qDm9 CPrvZqBIocUsJn0VAYfPnk0B+cbFcC/TTx7ajmDiSGX7ymx7H3LtkYPCpGeHGf99yRxo2Yinjf3 g0c5dPQVZ9SdtSkS227NT/HjMd7vLRRJhl2ne6IbwkrFzybAAa6VLlX+1nW5JoxtYXm6SXoFpd3 VrwGom//9wcah4zQg1ivFK+uU65qUT6ig+HupDy3rwuIo8I3Dd0PDs++zGxu5vSbqvIBihGgIJu rGQ2CYXbxvS09+FkthDdldqx6yDsJ6CM3xdnahX1mjayKJvBzTUq2NxLmJgBagdDnSdCs5EXlbL 6h0D1rqU2X/CHzQ2o/UAuFgE4/GR/q2EFz55YGzXof4R9QvjoWgDXUQdVlie2gnV7hLLzsJ7 X-Authority-Analysis: v=2.4 cv=ZpjtK87G c=1 sm=1 tr=0 ts=6808e802 cx=c_pps a=JYp8KDb2vCoCEuGobkYCKw==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=GEpy-HfZoHoA:10 a=IkcTkHD0fZMA:10 a=XR8D0OoHHMoA:10 a=ZOzjf2MOAAAA:8 a=COk6AnOGAAAA:8 a=8k5bqqvh19RxIrhT-ooA:9 a=QEXdDO2ut3YA:10 a=1Mhi-5-LkjG4w5oc0yAU:22 a=TjNXssC_j7lpFel5tvFf:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.680,FMLib:17.12.80.40 definitions=2025-04-23_08,2025-04-22_01,2025-02-21_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 malwarescore=0 lowpriorityscore=0 priorityscore=1501 phishscore=0 clxscore=1015 bulkscore=0 suspectscore=0 mlxlogscore=867 spamscore=0 impostorscore=0 mlxscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2504070000 definitions=main-2504230092 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250423_061616_913796_BC10F435 X-CRM114-Status: GOOD ( 16.03 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 4/18/2025 2:11 AM, Russell King (Oracle) wrote: > On Thu, Apr 17, 2025 at 06:47:10PM +0800, Luo Jie wrote: >> Replaced below code with the wrapper FIELD_MODIFY(MASK, ®, val) >> - reg &= ~MASK; >> - reg |= FIELD_PREP(MASK, val); >> The semantic patch that makes this change is available >> in scripts/coccinelle/misc/field_modify.cocci. >> >> More information about semantic patching is available at >> https://coccinelle.gitlabpages.inria.fr/website >> >> Signed-off-by: Luo Jie >> --- >> arch/arm64/include/asm/tlbflush.h | 3 +-- >> 1 file changed, 1 insertion(+), 2 deletions(-) >> >> diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h >> index eba1a98657f1..0d250ef4161c 100644 >> --- a/arch/arm64/include/asm/tlbflush.h >> +++ b/arch/arm64/include/asm/tlbflush.h >> @@ -112,8 +112,7 @@ static inline unsigned long get_trans_granule(void) >> level >= 0 && level <= 3) { \ >> u64 ttl = level & 3; \ >> ttl |= get_trans_granule() << 2; \ >> - arg &= ~TLBI_TTL_MASK; \ >> - arg |= FIELD_PREP(TLBI_TTL_MASK, ttl); \ >> + FIELD_MODIFY(TLBI_TTL_MASK, &arg, ttl); \ > > This could equally be: > arg = u64_replace_bits(arg, ttl, TLBI_TTL_MASK); > > which already exists, so doesn't require a new macro to be introduced. > Looks like the new macro FIELD_MODIFY() is accepted by Yury, maybe we can keep to use FIELD_MODIFY() with this change for better readability?