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Wed, 13 Dec 2023 23:36:59 +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 v3 33/34] s390: Implement the architecture-specific kmsan functions Date: Thu, 14 Dec 2023 00:24:53 +0100 Message-ID: <20231213233605.661251-34-iii@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231213233605.661251-1-iii@linux.ibm.com> References: <20231213233605.661251-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: qiAanGtjw_k-Ynk9arA87Z9sLMA4H9mO X-Proofpoint-ORIG-GUID: NB6qBGtqheS0YkDLhpLmLgpssbWag-y_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-13_14,2023-12-13_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 mlxlogscore=726 lowpriorityscore=0 adultscore=0 phishscore=0 mlxscore=0 suspectscore=0 priorityscore=1501 clxscore=1015 spamscore=0 impostorscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2312130167 X-Rspamd-Queue-Id: C473FA000C X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: 1g8tc15cihizcfq7sm6wswaswcphy48i X-HE-Tag: 1702510631-711843 X-HE-Meta: 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 yZpK85Bq HaGUBHky11bx/iTmQnqew4dCdFHBamglxG5eSIR9kJCqIqwQnULpsElEguGQc6xMwsYzdnFlCAIT2Nf2lvBIQK7cTOIb545Aj42iZAgNUr2e+cJ9NGUpsWMCXVqP85L0B+uCtNpsnvYJaiQGt+ZWgOqAGRnodFuJa45lBUThPfzA5Vs6zvVGPHfI8t4BPHMe9BtE/5jnEV98LAY5Um9BbSsHwJIKU9LtvUjwWjYQoHOPNgGWL4XtRnJY7jlEuTIdBPmKFy4EsgE4oY5PZnN3O0Ymgt7UvNad/metXULT5G8UY2qUFUEtAk1WKkw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000027, 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(). Signed-off-by: Ilya Leoshkevich Reviewed-by: Alexander Potapenko Acked-by: Heiko Carstens --- 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 */