From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 978353B6368 for ; Tue, 7 Apr 2026 13:18:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775567928; cv=none; b=KuJ7B7KMcc5X2QNPN+W85gQGkO1q1EDiV4BQwF/Mx46BNE4q8XyXyVDorZvuaOF89wAdwcDI1u4sea+oaSA/Frc33SKV23SliAKRswqbOymXoimX4D0TxVz/8CgubaD/6GQADC6+xxycwSjcycmQepnf5tUTtZNJgU0MYOLhvgA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775567928; c=relaxed/simple; bh=i+c6ra3/8cZfXlo5XIHBX2j6T0++N9EkiOZ/PzP/xNw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=hjnHOG4GQWoznibUZei8rv98Li1UJyA8XrfyY5nRxr8uxeZhwxz2Pfig3QI6vkU5xcz2PVtcHHgV+pRwxtSXEabJZXA8jb7ZqtzwVjG5zxa1x+0OTX3QrQEl1DQU4HDnBJDui+SKrrcQN8JgrsG15p9QQwpzcsHwqJ0K4zLJkiU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=OshVwYxT; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="OshVwYxT" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 4572A1BB2; Tue, 7 Apr 2026 06:18:40 -0700 (PDT) Received: from lakrids.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 2299C3F7D8; Tue, 7 Apr 2026 06:18:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1775567926; bh=i+c6ra3/8cZfXlo5XIHBX2j6T0++N9EkiOZ/PzP/xNw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OshVwYxTFGTFGSawa5bRFmJFGOmv6oo9ggoXahGU2HPlPekNW42uksSRVLBHgshN8 qhZpaqGD1kCOGOzH4tumL/B5WziD4rsw2/JXT82fF7Q8r43PJjDMf9hYWNsdIEA2kC lj69fBtqTtoymQnq/o18Itvj/tC4do9loaIRqu0I= From: Mark Rutland To: linux-arm-kernel@lists.infradead.org, Catalin Marinas , Will Deacon Cc: ada.coupriediaz@arm.com, linux-kernel@vger.kernel.org, luto@kernel.org, mark.rutland@arm.com, peterz@infradead.org, ruanjinjie@huawei.com, tglx@kernel.org, vladimir.murzin@arm.com Subject: [PATCH 08/10] arm64: entry: Use irqentry_{enter_from,exit_to}_kernel_mode() Date: Tue, 7 Apr 2026 14:16:48 +0100 Message-Id: <20260407131650.3813777-9-mark.rutland@arm.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20260407131650.3813777-1-mark.rutland@arm.com> References: <20260407131650.3813777-1-mark.rutland@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The generic irqentry code now provides irqentry_enter_from_kernel_mode() and irqentry_exit_to_kernel_mode(), which can be used when an exception is known to be taken from kernel mode. These can be inlined into architecture-specific entry code, and avoid redundant work to test whether the exception was taken from user mode. Use these in arm64_enter_from_kernel_mode() and arm64_exit_to_kernel_mode(), which are only used for exceptions known to be taken from kernel mode. This will remove a small amount of redundant work, and will permit further changes to arm64_exit_to_kernel_mode() in subsequent patches. There should be no funcitonal change as a result of this patch. Signed-off-by: Mark Rutland Cc: Andy Lutomirski Cc: Catalin Marinas Cc: Jinjie Ruan Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Vladimir Murzin Cc: Will Deacon --- arch/arm64/kernel/entry-common.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c index 3d01cdacdc7a2..16a65987a6a9b 100644 --- a/arch/arm64/kernel/entry-common.c +++ b/arch/arm64/kernel/entry-common.c @@ -39,7 +39,7 @@ static noinstr irqentry_state_t arm64_enter_from_kernel_mode(struct pt_regs *reg { irqentry_state_t state; - state = irqentry_enter(regs); + state = irqentry_enter_from_kernel_mode(regs); mte_check_tfsr_entry(); mte_disable_tco_entry(current); @@ -55,7 +55,7 @@ static void noinstr arm64_exit_to_kernel_mode(struct pt_regs *regs, irqentry_state_t state) { mte_check_tfsr_exit(); - irqentry_exit(regs, state); + irqentry_exit_to_kernel_mode(regs, state); } /* -- 2.30.2