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Thu, 13 Jun 2024 15:39:34 +0000 (GMT) From: Ilya Leoshkevich To: Alexander Gordeev , Alexander Potapenko , Andrew Morton , Christoph Lameter , David Rientjes , Heiko Carstens , 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 v4 04/35] kmsan: Increase the maximum store size to 4096 Date: Thu, 13 Jun 2024 17:34:06 +0200 Message-ID: <20240613153924.961511-5-iii@linux.ibm.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240613153924.961511-1-iii@linux.ibm.com> References: <20240613153924.961511-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: Rjws6SciTz59Dde6VDV_aw_xavPEr1pZ X-Proofpoint-GUID: Xwy5kU6ucR_kMY8jtxtA8RihxWWe-8mA X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-06-13_08,2024-06-13_02,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=742 adultscore=0 spamscore=0 mlxscore=0 priorityscore=1501 bulkscore=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 impostorscore=0 suspectscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405170001 definitions=main-2406130109 X-Stat-Signature: 65kxkoj38p8fu3bygreor6p7snzq5gak X-Rspamd-Queue-Id: 0ACB718000E X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1718293190-470635 X-HE-Meta: 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 88IjL27u ELLdbVviuxjD1it876i2btp91P76SFXvoo6XogiD+XrofjzjHRoG5av/zNBCC2/nMhepTlz+/fquJQG7DFo63ztelLKROvqddeM5eLAVQSz7h4SLkyr270OJjDs+5Zla1sP8PJ9CX5ZCpAwsAOHbbdzc7ghSefxwAkqQPuQdejnugbuA02SiXR5oZR0xlLxFJDOsnyELbd6G7Rs4yrSHtcWQfjUACjkFRh1iZSOYVHXb7iXM0cZfwTo5n+vUMeg9nWkZLnsUWkOhgYVmnisfUodlfNFpvvmDCWvM1s00K3O/2sKF9eWI42ybRLqXHPtPKgRGKn5dKG74KjXN6l8CYfd/y7jchDDExHM4lv1DDLcQrH9o= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000016, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: The inline assembly block in s390's chsc() stores that much. Reviewed-by: Alexander Potapenko 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; }