From patchwork Wed Nov 15 20:30:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilya Leoshkevich X-Patchwork-Id: 13457311 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="XJj4gqRK" Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 37A69D42; Wed, 15 Nov 2023 12:34:43 -0800 (PST) Received: from pps.filterd (m0353726.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3AFKCEbw020024; Wed, 15 Nov 2023 20:34:20 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=/jeu8ikBdkG3zT8cTTXDudBR3p8yyOmYypD5+KnSOCc=; b=XJj4gqRKmolO6HaPwamZIPxiW7a94DubZ3Lh4Zo3ERklwMevuk9M6ZdOd0MqGJlJ8zOY ILwoxdECXoBgf0MIp+j7SFeO8MAC+ZwSHAuC8bFhucruxiW1t2O8mGBZ7lCS8wvjmNTG ZnLMcpG3px8DPkwcMgVnK+gQwRM5b86Q5Z6ho2/jN/xnDebeNFcbE9uYAEvcsuTOjiqC TImOzxLm8zqUFIuMYwclvIOrbo25ssWXv0fAvlq9A/bgYXB3BPJVSzZ8TYP1Y38oF8eE j1eX7rAEskNY8O7ms8SXmF+6uko9S+a34cqDzepPYk5VYN0DzCU9gUFcA3c+cZhFP2fF YQ== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3ud4thgjvk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 15 Nov 2023 20:34:20 +0000 Received: from m0353726.ppops.net (m0353726.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3AFKCaZt021252; Wed, 15 Nov 2023 20:34:19 GMT Received: from ppma11.dal12v.mail.ibm.com (db.9e.1632.ip4.static.sl-reverse.com [50.22.158.219]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3ud4thgjv4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 15 Nov 2023 20:34:19 +0000 Received: from pps.filterd (ppma11.dal12v.mail.ibm.com [127.0.0.1]) by ppma11.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3AFKIxFi024837; Wed, 15 Nov 2023 20:34:18 GMT Received: from smtprelay02.fra02v.mail.ibm.com ([9.218.2.226]) by ppma11.dal12v.mail.ibm.com (PPS) with ESMTPS id 3uapn1sj4m-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 15 Nov 2023 20:34:18 +0000 Received: from smtpav01.fra02v.mail.ibm.com (smtpav01.fra02v.mail.ibm.com [10.20.54.100]) by smtprelay02.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 3AFKYFGK28639744 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 15 Nov 2023 20:34:15 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3A8DD20040; Wed, 15 Nov 2023 20:34:15 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E4C8120043; Wed, 15 Nov 2023 20:34:13 +0000 (GMT) Received: from heavy.boeblingen.de.ibm.com (unknown [9.179.9.51]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 15 Nov 2023 20:34:13 +0000 (GMT) From: Ilya Leoshkevich To: Alexander Gordeev , Alexander Potapenko , Andrew Morton , Christoph Lameter , David Rientjes , Joonsoo Kim , Marco Elver , Masami Hiramatsu , Pekka Enberg , Steven Rostedt , Vasily Gorbik , Vlastimil Babka Cc: Christian Borntraeger , Dmitry Vyukov , Hyeonggon Yoo <42.hyeyoo@gmail.com>, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Mark Rutland , Roman Gushchin , Sven Schnelle , Ilya Leoshkevich Subject: [PATCH 04/32] kmsan: Increase the maximum store size to 4096 Date: Wed, 15 Nov 2023 21:30:36 +0100 Message-ID: <20231115203401.2495875-5-iii@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231115203401.2495875-1-iii@linux.ibm.com> References: <20231115203401.2495875-1-iii@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: iSRl1qDbw0UxpkQf1oYEu1Z8v5dlxZV_ X-Proofpoint-ORIG-GUID: 2IYbA0_0cM-XcK8HWULf9sl6eCYS08q2 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-15_20,2023-11-15_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 impostorscore=0 lowpriorityscore=0 phishscore=0 suspectscore=0 adultscore=0 priorityscore=1501 mlxscore=0 mlxlogscore=693 clxscore=1015 spamscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311150163 The inline assembly block in s390's chsc() stores that much. Signed-off-by: Ilya Leoshkevich --- mm/kmsan/instrumentation.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/mm/kmsan/instrumentation.c b/mm/kmsan/instrumentation.c index cc3907a9c33a..470b0b4afcc4 100644 --- a/mm/kmsan/instrumentation.c +++ b/mm/kmsan/instrumentation.c @@ -110,11 +110,10 @@ void __msan_instrument_asm_store(void *addr, uintptr_t size) ua_flags = user_access_save(); /* - * Most of the accesses are below 32 bytes. The two exceptions so far - * are clwb() (64 bytes) and FPU state (512 bytes). - * It's unlikely that the assembly will touch more than 512 bytes. + * Most of the accesses are below 32 bytes. The exceptions so far are + * clwb() (64 bytes), FPU state (512 bytes) and chsc() (4096 bytes). */ - if (size > 512) { + if (size > 4096) { WARN_ONCE(1, "assembly store size too big: %ld\n", size); size = 8; }