[PATCH v6 04/39] kmsan: Increase the maximum store size to 4096
From: Ilya Leoshkevich <iii@linux.ibm.com>
Date: 2024-06-21 00:27:16
Also in:
linux-mm, linux-s390, lkml
Subsystem:
kmsan, memory management, the rest · Maintainers:
Alexander Potapenko, Andrew Morton, Linus Torvalds
The inline assembly block in s390's chsc() stores that much. Reviewed-by: Alexander Potapenko <glider@google.com> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> --- 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; }
--
2.45.1