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Fri, 21 Jun 2024 00:26:23 +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 v6 04/39] kmsan: Increase the maximum store size to 4096 Date: Fri, 21 Jun 2024 02:24:38 +0200 Message-ID: <20240621002616.40684-5-iii@linux.ibm.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240621002616.40684-1-iii@linux.ibm.com> References: <20240621002616.40684-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: J1o-CJjYWKam0l2NJ9h0aJVuFgfwswrO X-Proofpoint-ORIG-GUID: kF08F-e28R6tb6coPiDjcwHsdnBay0lG 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=2024-06-20_09,2024-06-20_04,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 mlxscore=0 suspectscore=0 impostorscore=0 malwarescore=0 mlxlogscore=742 bulkscore=0 lowpriorityscore=0 priorityscore=1501 spamscore=0 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2406140001 definitions=main-2406200174 X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 8BF80C0012 X-Stat-Signature: ijbpwcjg63peu13i8xiiszw8y9i6k4cf X-Rspam-User: X-HE-Tag: 1718929621-554126 X-HE-Meta: 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 ULZ9nf3o QAAmh1rPCflCVjvOa6oX4THkJYYaIcHPrdnpXqULHVCOjmRswka9JwbEnjjejQEBdv4RqeMQwKl49hnpXh6ROuktsFxzbYjxNXpJOQhzkj66rTHq1TqP1Ke/cpJr9vo7raQHL6MnYcPyFPnGGY1u01QtZrFvuHhxPuB03ZhMt9YA22Ytuu+gFKuYa/ldhA2HYVxEOr24J98IHuhvjcAXJ9d6Vms+nJd+RqD/U6mFvOQ/jaf0+2N0VZP+lk09ydESrX8tS5j4EEbm0oryFo8mBOCXEWA== 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; }