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Tue, 21 Nov 2023 22:02:08 +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 v2 04/33] kmsan: Increase the maximum store size to 4096 Date: Tue, 21 Nov 2023 23:00:58 +0100 Message-ID: <20231121220155.1217090-5-iii@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231121220155.1217090-1-iii@linux.ibm.com> References: <20231121220155.1217090-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: z5-ZM4Gxzj6Ebmi_lGgdK9mg79HiPr-V X-Proofpoint-ORIG-GUID: t3WD69eD7AqaziWdbzP9Q_VGrjo1ghsC 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=2023-11-21_12,2023-11-21_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 clxscore=1015 impostorscore=0 mlxlogscore=696 phishscore=0 mlxscore=0 adultscore=0 bulkscore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311210172 X-Rspamd-Queue-Id: CF78610001E X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: kxiykxucunygz7b4nfxjmwptmu1djnig X-HE-Tag: 1700604442-702836 X-HE-Meta: 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 yekGvFhL ZteIIP4zS2ExzW6pONxEzEKg0a8mtNYVAJ5VpyDw/xto45b9SqidgPSaqw2MU/dGpPDx/Y0rlW+489q7r0DrRP7e1/KZJO/dP6pDQHyAdVCA8Xx2LJskvbDqn2ypeLtsQKJD59B3wNXUIZp0rBbwHBR/S+FhIfJrYLa1+I8Esq2GSEXZ2aVduFqR4h0nuR4gjZbUpZ7qub7a1VsK6HAg7L2X9LRF2hGJOpaWrGmOHpnbaYTpAWMPpP3cVPQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000038, 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. Signed-off-by: Ilya Leoshkevich Reviewed-by: Alexander Potapenko --- 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; }