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Thu, 13 Jun 2024 15:39:51 +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 34/35] s390: Implement the architecture-specific KMSAN functions Date: Thu, 13 Jun 2024 17:34:36 +0200 Message-ID: <20240613153924.961511-35-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-GUID: EyA2kbsVp8WqCccHu6SjxoBNfiDsWCum X-Proofpoint-ORIG-GUID: GZ2-WR2_gP5V6QUvEBJcKL9zIIoL9Eok 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_09,2024-06-13_02,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 impostorscore=0 adultscore=0 suspectscore=0 lowpriorityscore=0 clxscore=1015 phishscore=0 spamscore=0 mlxscore=0 bulkscore=0 malwarescore=0 mlxlogscore=747 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405170001 definitions=main-2406130112 X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: C7ECB40017 X-Stat-Signature: 3acstpwh4knnubiwno7f6izzgo9kkkcw X-HE-Tag: 1718293206-299445 X-HE-Meta: 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 sewvi5vU 61z4GYjavt3F1QvV3cFq5VNVj+JaSjhEeFeeitIODA31Ic0uKNP8OX5eghUn7tzdz91sU0etZVAP/tDr3NR8+wxwyk63N7ZFZPkrTZKfLMyQD2+LsGZ7C7euD4x7qnLBgOwUdqRieT1oCFpXsDB+Bnciq/1zo6FLcdedGnkHCk78uIPaB+easwZfQAqNCMIH/vMLukSo9n41Id9xrsyKBHDyIk/OpwXxn2KY8Ys9W50esIMEmRrU6P4OeD7O5db0RlAFSXUjsCGIdpiTmJsuhgN2PWg6jSQQ7I4Nt+nTFSI3Zg8mevtd2LeMOE74UUYz39GV3RIvH9erkyTWH8lEIVQLw8Hx+05d+HFxj2q5eRKH70EU= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000003, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: arch_kmsan_get_meta_or_null() finds the lowcore shadow by querying the prefix and calling kmsan_get_metadata() again. kmsan_virt_addr_valid() delegates to virt_addr_valid(). Reviewed-by: Alexander Potapenko Acked-by: Heiko Carstens Signed-off-by: Ilya Leoshkevich --- arch/s390/include/asm/kmsan.h | 43 +++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 arch/s390/include/asm/kmsan.h diff --git a/arch/s390/include/asm/kmsan.h b/arch/s390/include/asm/kmsan.h new file mode 100644 index 000000000000..e572686d340c --- /dev/null +++ b/arch/s390/include/asm/kmsan.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_S390_KMSAN_H +#define _ASM_S390_KMSAN_H + +#include +#include +#include +#include +#include + +#ifndef MODULE + +static inline bool is_lowcore_addr(void *addr) +{ + return addr >= (void *)&S390_lowcore && + addr < (void *)(&S390_lowcore + 1); +} + +static inline void *arch_kmsan_get_meta_or_null(void *addr, bool is_origin) +{ + if (is_lowcore_addr(addr)) { + /* + * Different lowcores accessed via S390_lowcore are described + * by the same struct page. Resolve the prefix manually in + * order to get a distinct struct page. + */ + addr += (void *)lowcore_ptr[raw_smp_processor_id()] - + (void *)&S390_lowcore; + if (WARN_ON_ONCE(is_lowcore_addr(addr))) + return NULL; + return kmsan_get_metadata(addr, is_origin); + } + return NULL; +} + +static inline bool kmsan_virt_addr_valid(void *addr) +{ + return virt_addr_valid(addr); +} + +#endif /* !MODULE */ + +#endif /* _ASM_S390_KMSAN_H */