From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A282313B2AC for ; Thu, 13 Jun 2024 20:31:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718310702; cv=none; b=Fcepy/hx715SWiLvXsN4DqNII7z7ZP5VrXYUL/iQ9hoNhXT4qA0jfmJMkBeUeGLBaHKQ1Fgr8RAUH2CMlAAPl00Vxnico7HbSa4X8DTRhpM2AE1dgU8LFYFGF/4Ss6mMEHAm7ScUoN16W3HNPg++q2rFjOb3adtyn9y30ufv1NE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718310702; c=relaxed/simple; bh=886BiOxRouXzR85kCIrvFsX6Cm2vllz5Wkt5qR00U7g=; h=Date:To:From:Subject:Message-Id; b=puwCD8Sk27K86h6lCN6fxUWI/iK78WawLGSO9Fz2LuZngywLXX5Aq7u6t+LmMPYga5b+wbTKjPpbXN79NwDNHo+7LOFrsBXQ8GmSCOpOXaUZJ1OLdtpNrDE7b8a84L3SYuahKRUvLRm2FlOrwzZTnYMM/XBRX/K5uj7mPxgpWpE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=B2OZCxGz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="B2OZCxGz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 78199C2BBFC; Thu, 13 Jun 2024 20:31:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1718310702; bh=886BiOxRouXzR85kCIrvFsX6Cm2vllz5Wkt5qR00U7g=; h=Date:To:From:Subject:From; b=B2OZCxGzvEC8qj5kWngJcY2CNZcJVu9KjpnM12PLTIjpAP9mNI3PSkVRMTbYbXdqh Quu7nhDAb5tk8pRpP2slf65F1McvNuEjy7bT2lE5IV0VVx0/TNXzX2wtZL9hNZ8h7k GM5EDQ3QT7J4on1fACD2za/5su41cqMyPT/Lv2hQ= Date: Thu, 13 Jun 2024 13:31:41 -0700 To: mm-commits@vger.kernel.org,vbabka@suse.cz,svens@linux.ibm.com,rostedt@goodmis.org,roman.gushchin@linux.dev,rientjes@google.com,penberg@kernel.org,mhiramat@kernel.org,mark.rutland@arm.com,iamjoonsoo.kim@lge.com,hca@linux.ibm.com,gor@linux.ibm.com,glider@google.com,elver@google.com,dvyukov@google.com,cl@linux.com,borntraeger@linux.ibm.com,agordeev@linux.ibm.com,42.hyeyoo@gmail.com,iii@linux.ibm.com,akpm@linux-foundation.org From: Andrew Morton Subject: + s390-implement-the-architecture-specific-kmsan-functions.patch added to mm-unstable branch Message-Id: <20240613203142.78199C2BBFC@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: s390: implement the architecture-specific KMSAN functions has been added to the -mm mm-unstable branch. Its filename is s390-implement-the-architecture-specific-kmsan-functions.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/s390-implement-the-architecture-specific-kmsan-functions.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Ilya Leoshkevich Subject: s390: implement the architecture-specific KMSAN functions Date: Thu, 13 Jun 2024 17:34:36 +0200 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(). Link: https://lkml.kernel.org/r/20240613153924.961511-35-iii@linux.ibm.com Signed-off-by: Ilya Leoshkevich Reviewed-by: Alexander Potapenko Acked-by: Heiko Carstens Cc: Alexander Gordeev Cc: Christian Borntraeger Cc: Christoph Lameter Cc: David Rientjes Cc: Dmitry Vyukov Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: Joonsoo Kim Cc: Marco Elver Cc: Mark Rutland Cc: Masami Hiramatsu (Google) Cc: Pekka Enberg Cc: Roman Gushchin Cc: Steven Rostedt (Google) Cc: Sven Schnelle Cc: Vasily Gorbik Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- arch/s390/include/asm/kmsan.h | 43 ++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) --- /dev/null +++ a/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 */ _ Patches currently in -mm which might be from iii@linux.ibm.com are ftrace-unpoison-ftrace_regs-in-ftrace_ops_list_func.patch kmsan-make-the-tests-compatible-with-kmsanpanic=1.patch kmsan-disable-kmsan-when-deferred_struct_page_init-is-enabled.patch kmsan-increase-the-maximum-store-size-to-4096.patch kmsan-fix-is_bad_asm_addr-on-arches-with-overlapping-address-spaces.patch kmsan-fix-kmsan_copy_to_user-on-arches-with-overlapping-address-spaces.patch kmsan-remove-a-useless-assignment-from-kmsan_vmap_pages_range_noflush.patch kmsan-remove-an-x86-specific-include-from-kmsanh.patch kmsan-expose-kmsan_get_metadata.patch kmsan-export-panic_on_kmsan.patch kmsan-allow-disabling-kmsan-checks-for-the-current-task.patch kmsan-support-slab_poison.patch kmsan-use-align_down-in-kmsan_get_metadata.patch kmsan-do-not-round-up-pg_data_t-size.patch mm-slub-let-kmsan-access-metadata.patch mm-slub-unpoison-the-memchr_inv-return-value.patch mm-kfence-disable-kmsan-when-checking-the-canary.patch lib-zlib-unpoison-dfltcc-output-buffers.patch kmsan-accept-ranges-starting-with-0-on-s390.patch s390-boot-turn-off-kmsan.patch s390-use-a-larger-stack-for-kmsan.patch s390-boot-add-the-kmsan-runtime-stub.patch s390-checksum-add-a-kmsan-check.patch s390-cpacf-unpoison-the-results-of-cpacf_trng.patch s390-cpumf-unpoison-stcctm-output-buffer.patch s390-diag-unpoison-diag224-output-buffer.patch s390-ftrace-unpoison-ftrace_regs-in-kprobe_ftrace_handler.patch s390-irqflags-do-not-instrument-arch_local_irq_-with-kmsan.patch s390-mm-define-kmsan-metadata-for-vmalloc-and-modules.patch s390-string-add-kmsan-support.patch s390-traps-unpoison-the-kernel_stack_overflows-pt_regs.patch s390-uaccess-add-kmsan-support-to-put_user-and-get_user.patch s390-unwind-disable-kmsan-checks.patch s390-implement-the-architecture-specific-kmsan-functions.patch kmsan-enable-on-s390.patch