From: Jisheng Zhang <jszhang@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Andrey Ryabinin <ryabinin.a.a@gmail.com>,
Alexander Potapenko <glider@google.com>,
Andrey Konovalov <andreyknvl@gmail.com>,
Dmitry Vyukov <dvyukov@google.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Tejun Heo <tj@kernel.org>, Dennis Zhou <dennis@kernel.org>,
Christoph Lameter <cl@gentwo.org>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com,
linux-mm@kvack.org
Subject: [PATCH v2 0/6] arm64: Fix instrumentation escapes from noinstr path
Date: Mon, 9 Nov 2026 19:44:53 +0800 [thread overview]
Message-ID: <20261109114500.20298-1-jszhang@kernel.org> (raw)
Code marked with noinstr can only safely call other noinstr or
__always_inline functions. When reading arm64 source code, I found
necessary noinstr markers is missing somewhere. So I asked AI to scan
the arm64, this series is the result.
Since v1:
Mainly address sashiko review comments:
- add always inline to per cpu helpers
- use tif_test_bit() instead of test_thread_flag() in sme_enter_from_user_mode
and sme_exit_to_user_mode
- a new patch to mark kasan_hw_tags_enabled always inlined
- a new patch to Disable branch profiling for architecture library code
Jisheng Zhang (6):
arm64: percpu: Always inline helpers used by noinstr code
arm64: entry: Always inline helpers used by non-instrumentable paths
kasan: Always inline kasan_hw_tags_enabled()
arm64: stacktrace: Always inline internal stack boundary helpers
arm64: lib: Disable branch profiling for architecture library code
arm64: alternatives: Make branch and ADRP offset helpers noinst
arch/arm64/include/asm/cpufeature.h | 8 +--
arch/arm64/include/asm/entry-common.h | 2 +-
arch/arm64/include/asm/fpsimd.h | 8 +--
arch/arm64/include/asm/mte-kasan.h | 4 +-
arch/arm64/include/asm/mte.h | 10 ++--
arch/arm64/include/asm/percpu.h | 18 +++----
arch/arm64/include/asm/stacktrace.h | 16 +++---
arch/arm64/include/asm/stacktrace/common.h | 12 ++---
arch/arm64/lib/Makefile | 4 ++
arch/arm64/lib/insn.c | 57 ++++++++++++++--------
include/linux/kasan-enabled.h | 4 +-
11 files changed, 82 insertions(+), 61 deletions(-)
--
2.55.0
next reply other threads:[~2026-11-09 12:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-09 11:44 Jisheng Zhang [this message]
2026-11-09 11:44 ` [PATCH v2 1/6] arm64: percpu: Always inline helpers used by noinstr code Jisheng Zhang
2026-11-09 11:44 ` [PATCH v2 2/6] arm64: entry: Always inline helpers used by non-instrumentable paths Jisheng Zhang
2026-11-09 11:44 ` [PATCH v2 3/6] kasan: Always inline kasan_hw_tags_enabled() Jisheng Zhang
2026-11-09 11:44 ` [PATCH v2 4/6] arm64: stacktrace: Always inline internal stack boundary helpers Jisheng Zhang
2026-11-09 11:44 ` [PATCH v2 5/6] arm64: lib: Disable branch profiling for architecture library code Jisheng Zhang
2026-11-09 11:44 ` [PATCH v2 6/6] arm64: alternatives: Make branch and ADRP offset helpers noinst Jisheng Zhang
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