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From:   Ilya Leoshkevich <iii@linux.ibm.com>
To:     Alexander Gordeev <agordeev@linux.ibm.com>,
        Alexander Potapenko <glider@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Christoph Lameter <cl@linux.com>,
        David Rientjes <rientjes@google.com>,
        Heiko Carstens <hca@linux.ibm.com>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>,
        Marco Elver <elver@google.com>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Pekka Enberg <penberg@kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Vasily Gorbik <gor@linux.ibm.com>,
        Vlastimil Babka <vbabka@suse.cz>
Cc:     Christian Borntraeger <borntraeger@linux.ibm.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        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 <mark.rutland@arm.com>,
        Roman Gushchin <roman.gushchin@linux.dev>,
        Sven Schnelle <svens@linux.ibm.com>,
        Ilya Leoshkevich <iii@linux.ibm.com>
Subject: [PATCH v3 20/34] s390: Use a larger stack for KMSAN
Date:   Thu, 14 Dec 2023 00:24:40 +0100
Message-ID: <20231213233605.661251-21-iii@linux.ibm.com>
In-Reply-To: <20231213233605.661251-1-iii@linux.ibm.com>
References: <20231213233605.661251-1-iii@linux.ibm.com>
MIME-Version: 1.0
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Adjust the stack size for the KMSAN-enabled kernel like it was done
for the KASAN-enabled one in commit 7fef92ccadd7 ("s390/kasan: double
the stack size"). Both tools have similar requirements.

Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 arch/s390/Makefile                  | 2 +-
 arch/s390/include/asm/thread_info.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 73873e451686..a7f5386d25ad 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -34,7 +34,7 @@ KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option
 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_CC_NO_ARRAY_BOUNDS),-Wno-array-bounds)
 
 UTS_MACHINE	:= s390x
-STACK_SIZE	:= $(if $(CONFIG_KASAN),65536,16384)
+STACK_SIZE	:= $(if $(CONFIG_KASAN),65536,$(if $(CONFIG_KMSAN),65536,16384))
 CHECKFLAGS	+= -D__s390__ -D__s390x__
 
 export LD_BFD
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index a674c7d25da5..d02a709717b8 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -16,7 +16,7 @@
 /*
  * General size of kernel stacks
  */
-#ifdef CONFIG_KASAN
+#if defined(CONFIG_KASAN) || defined(CONFIG_KMSAN)
 #define THREAD_SIZE_ORDER 4
 #else
 #define THREAD_SIZE_ORDER 2
-- 
2.43.0