From nobody Tue Apr 7 02:36:12 2026 Received: from canpmsgout06.his.huawei.com (canpmsgout06.his.huawei.com [113.46.200.221]) (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 9BECF37FF5B; Tue, 17 Mar 2026 08:20:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=113.46.200.221 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773735609; cv=none; b=jp7pnEB2TX40UCdzFOCyO3FhhyuGO/t+HwZbW3aQetqKVI0yXZR2yFcAWu8GlwJWNMAMQPwlytcEyj8cfoXSvysjqsvhSgqAjHDcqmwRcGhygK2m0V8a2D2yq5xX+Ez8rV1eK9wrJcmYDpIc5nws6MZoVB9azAciamd6cBc/HWE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773735609; c=relaxed/simple; bh=serGm1rUs+m82eoFVjhBlpo3u6+JxH3Uai4mDd1TxTo=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=fKrhoerZDWEX2/vEuTJgt8bQil1OEgzwoA9/4aEzrYRFm2t+q+tKZ7YnoLY1CBJXPW5WihlypwnPXoRw71aQtn4M3ySEAK3/W9szKQ/WiUInIs5RIFpFyuUbVhU+75mA7DBLjism8xJ/NowRdhVYoOn67xoRNhpzYD+D/Qm32a4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b=I9kIsBq0; arc=none smtp.client-ip=113.46.200.221 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b="I9kIsBq0" dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=GLJ5XubJBfDJfUuOM58o11k78XnXZ7Y2DNp2dl1D/fs=; b=I9kIsBq0rEldvH1pV/t2PPj5ksmYCRu9Ea0cHuZ6xohcPJTXps0Xy1ioEe9+cguZFqBqCcZug /PUbYSXX6nPI5l0nOX2zkFQQp1bUPwyT0L88FmN9VqtA48YtrpX8FQ/aYX9VabX89Mq77ZNH/a8 m7m3LydRbGb6fEV+Uy/WVgg= Received: from mail.maildlp.com (unknown [172.19.162.144]) by canpmsgout06.his.huawei.com (SkyGuard) with ESMTPS id 4fZlBK5cMrzRhR0; Tue, 17 Mar 2026 16:15:05 +0800 (CST) Received: from dggpemf500011.china.huawei.com (unknown [7.185.36.131]) by mail.maildlp.com (Postfix) with ESMTPS id DC93F40567; Tue, 17 Mar 2026 16:20:03 +0800 (CST) Received: from huawei.com (10.90.53.73) by dggpemf500011.china.huawei.com (7.185.36.131) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Tue, 17 Mar 2026 16:20:01 +0800 From: Jinjie Ruan To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , CC: Subject: [PATCH v13 RESEND 01/14] arm64/ptrace: Refactor syscall_trace_enter/exit() to accept flags parameter Date: Tue, 17 Mar 2026 16:20:07 +0800 Message-ID: <20260317082020.737779-2-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260317082020.737779-1-ruanjinjie@huawei.com> References: <20260317082020.737779-1-ruanjinjie@huawei.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: kwepems200001.china.huawei.com (7.221.188.67) To dggpemf500011.china.huawei.com (7.185.36.131) Refactor syscall_trace_enter() and syscall_trace_exit() to move thread flag reading to the caller. This aligns arm64's syscall trace enter/exit function signature with generic entry framework. [Changes] 1. Function signature changes: - syscall_trace_enter(regs) =E2=86=92 syscall_trace_enter(regs, flags) - syscall_trace_exit(regs) =E2=86=92 syscall_trace_exit(regs, flags) 2. Move flags reading to caller: - Previously: read_thread_flags() called inside each function. - Now: caller (like el0_svc_common) passes flags as parameter. 3. Update syscall.c: - el0_svc_common() now passes flags to tracing functions and re-fetches flags before exit to handle potential TIF updates. [Why this matters] - Aligns arm64 with the generic entry interface. - Makes future migration to generic entry framework. No functional changes intended. Cc: Will Deacon Cc: Catalin Marinas Reviewed-by: Kevin Brodsky Signed-off-by: Jinjie Ruan Reviewed-by: Linus Walleij --- arch/arm64/include/asm/syscall.h | 4 ++-- arch/arm64/kernel/ptrace.c | 7 ++----- arch/arm64/kernel/syscall.c | 5 +++-- 3 files changed, 7 insertions(+), 9 deletions(-) diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/sysc= all.h index 5e4c7fc44f73..30b203ef156b 100644 --- a/arch/arm64/include/asm/syscall.h +++ b/arch/arm64/include/asm/syscall.h @@ -120,7 +120,7 @@ static inline int syscall_get_arch(struct task_struct *= task) return AUDIT_ARCH_AARCH64; } =20 -int syscall_trace_enter(struct pt_regs *regs); -void syscall_trace_exit(struct pt_regs *regs); +int syscall_trace_enter(struct pt_regs *regs, unsigned long flags); +void syscall_trace_exit(struct pt_regs *regs, unsigned long flags); =20 #endif /* __ASM_SYSCALL_H */ diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index ba5eab23fd90..e4d524ccbc7b 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -2408,9 +2408,8 @@ static void report_syscall_exit(struct pt_regs *regs) } } =20 -int syscall_trace_enter(struct pt_regs *regs) +int syscall_trace_enter(struct pt_regs *regs, unsigned long flags) { - unsigned long flags =3D read_thread_flags(); int ret; =20 if (flags & (_TIF_SYSCALL_EMU | _TIF_SYSCALL_TRACE)) { @@ -2432,10 +2431,8 @@ int syscall_trace_enter(struct pt_regs *regs) return regs->syscallno; } =20 -void syscall_trace_exit(struct pt_regs *regs) +void syscall_trace_exit(struct pt_regs *regs, unsigned long flags) { - unsigned long flags =3D read_thread_flags(); - audit_syscall_exit(regs); =20 if (flags & _TIF_SYSCALL_TRACEPOINT) diff --git a/arch/arm64/kernel/syscall.c b/arch/arm64/kernel/syscall.c index c062badd1a56..e8fd0d60ab09 100644 --- a/arch/arm64/kernel/syscall.c +++ b/arch/arm64/kernel/syscall.c @@ -124,7 +124,7 @@ static void el0_svc_common(struct pt_regs *regs, int sc= no, int sc_nr, */ if (scno =3D=3D NO_SYSCALL) syscall_set_return_value(current, regs, -ENOSYS, 0); - scno =3D syscall_trace_enter(regs); + scno =3D syscall_trace_enter(regs, flags); if (scno =3D=3D NO_SYSCALL) goto trace_exit; } @@ -143,7 +143,8 @@ static void el0_svc_common(struct pt_regs *regs, int sc= no, int sc_nr, } =20 trace_exit: - syscall_trace_exit(regs); + flags =3D read_thread_flags(); + syscall_trace_exit(regs, flags); } =20 void do_el0_svc(struct pt_regs *regs) --=20 2.34.1