From nobody Sat Feb 7 05:33:02 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 C57353A0E93; Tue, 3 Feb 2026 13:37:32 +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=1770125854; cv=none; b=u78hhWdOiXkSGl85COSpaqnIvaxxXLGn0HseVylVgXoICZ50PMBpZ3VjLDHZ5IJNFHrjnNxAsYlIaZs5AbYmhWuCyNh2GI520my4SJbxdirxe5hVmEkAQzxfuW8so4aFutbx8goW3Xd2ZMb6y/2zwVztm/oBfSxl2BqbyThl0NU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770125854; c=relaxed/simple; bh=h0S17h5TRmhsi2ldEFX+XpByUgnWFB6C2bvNUEgUtQM=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=nXdnUVQ5lc8l9u9p26gcnrIptuVUjFMKlEXvaKdunicNVM1ksgqIZjBSEa7rqfUBlGyNFV131/W71cn+N19K6l5Jo8yzLnCmPsqn+PVGvBkr/4qXJGUkG/p0uzwDS529LLzKV7PxeyP978PnKWPLIe/cLuB2X+B9+wcN4LwjgN0= 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=IO8W6G9r; 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="IO8W6G9r" dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=dTV0Oa/cOQqWwINmH2VGeDsRDI5Mdh3dGyGmVrTzyNQ=; b=IO8W6G9rg+l07dq3t/hBC0kwwpklTbYZGPSK5Mgntj+BWTZFmxjGRTmr0nYrMb8KkyZjqBv3p /SmBqUEkqXZM0faM20MK0Mad4XcwL9jiNFyEPcRXRzKX/TvwXoZ4QOqj3Z/Ve3EEpUrVC3vI+Ro /7Kwy13s7EuXA5XBjgYDZbA= Received: from mail.maildlp.com (unknown [172.19.163.104]) by canpmsgout06.his.huawei.com (SkyGuard) with ESMTPS id 4f54DN0llQzRhSv; Tue, 3 Feb 2026 21:32:52 +0800 (CST) Received: from dggpemf500011.china.huawei.com (unknown [7.185.36.131]) by mail.maildlp.com (Postfix) with ESMTPS id 40EEA4056A; Tue, 3 Feb 2026 21:37:25 +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, 3 Feb 2026 21:37:23 +0800 From: Jinjie Ruan To: , , , , , , , , , , , , , , , , , , , , , , , , , , , CC: Subject: [PATCH v12 12/13] arm64: Inline el0_svc_common() Date: Tue, 3 Feb 2026 21:37:27 +0800 Message-ID: <20260203133728.848283-13-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260203133728.848283-1-ruanjinjie@huawei.com> References: <20260203133728.848283-1-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: kwepems200002.china.huawei.com (7.221.188.68) To dggpemf500011.china.huawei.com (7.185.36.131) After switch arm64 to Generic Entry, the compiler no longer inlines el0_svc_common() into do_el0_svc(). So inline el0_svc_common() and it has 1% performance uplift on perf bench basic syscall on kunpeng920 as below which is based on v6.19-rc1. | Metric | W/O this patch | With this patch | Change | | ---------- | -------------- | --------------- | --------- | | Total time | 2.195 [sec] | 2.171 [sec] | =E2=86=931.1% | | usecs/op | 0.219575 | 0.217192 | =E2=86=931.1% | | ops/sec | 4,554,260 | 4,604,225 | =E2=86=911.1% | Reviewed-by: Kevin Brodsky Signed-off-by: Jinjie Ruan --- arch/arm64/kernel/syscall.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/syscall.c b/arch/arm64/kernel/syscall.c index 77d00a5cf0e9..6fcd97c46716 100644 --- a/arch/arm64/kernel/syscall.c +++ b/arch/arm64/kernel/syscall.c @@ -66,8 +66,8 @@ static void invoke_syscall(struct pt_regs *regs, unsigned= int scno, choose_random_kstack_offset(get_random_u16()); } =20 -static void el0_svc_common(struct pt_regs *regs, int scno, int sc_nr, - const syscall_fn_t syscall_table[]) +static __always_inline void el0_svc_common(struct pt_regs *regs, int scno,= int sc_nr, + const syscall_fn_t syscall_table[]) { unsigned long work =3D READ_ONCE(current_thread_info()->syscall_work); unsigned long flags =3D read_thread_flags(); --=20 2.34.1