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Wed, 19 Jun 2024 15:45:34 +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 v5 04/37] kmsan: Increase the maximum store size to 4096 Date: Wed, 19 Jun 2024 17:43:39 +0200 Message-ID: <20240619154530.163232-5-iii@linux.ibm.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240619154530.163232-1-iii@linux.ibm.com> References: <20240619154530.163232-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: yqBnn__VPUChFXLmx57TWXMbRlB3RKnh X-Proofpoint-GUID: wAGMmQY3YfNo3xdFT986fs_57LHV7tLj 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=2024-06-19_02,2024-06-19_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 bulkscore=0 clxscore=1015 phishscore=0 mlxlogscore=742 spamscore=0 mlxscore=0 malwarescore=0 suspectscore=0 adultscore=0 impostorscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405170001 definitions=main-2406190115 X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: DD89A40020 X-Stat-Signature: 6maa31wm7zmcsf8gdxnfsqt899p39xgo X-Rspam-User: X-HE-Tag: 1718811958-695563 X-HE-Meta: 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 0OkzEy3K yqTH7rFqDsrstOmpH91IAKCEenl/NxLeps0ak5hWI+u784qdUBDl+ovMSKD5pb3zymAYWEugVOdjIj7azMywD29XgF9zPd1u/L0POyEOkSuw3bFg/V+USuVQ0xiPeUTPDoDchNRageFOAAfZS4nheitJyrH6Q/MD3XZMqyaEWCzBfrz6XmthfcRJw+aaPnUaNA5DVr3O11K1xhnCBUN2pIs2695HO10sRcDSGbVOEUrJjWRGWRzoIptxAGWSef8sYmb48JkCWzNMnKVuWXrhhw/Ckjw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000010, 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; }