From nobody Tue Feb 10 10:08:00 2026 Received: from canpmsgout12.his.huawei.com (canpmsgout12.his.huawei.com [113.46.200.227]) (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 96326329E46; Mon, 22 Dec 2025 11:48:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=113.46.200.227 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766404118; cv=none; b=sNdFTq2pO650mHdXr7bmPI0tFubpKy0jFoIYytLiJ8Co7UNUPHMfH0Ewjg0dLLSn6XF7qxPLpNLodxDkueNaXuUkOc8qctIvpcdo7lOMbyDurWBfTMYEBOQsKQkpmbOM305ZdTZhURV243vB9pKKabCWh1KFTtpB1712Qt9nKNI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766404118; c=relaxed/simple; bh=DlAuNfHcDAnBWNTtcVAuSZqlrfIHDJ1ArnJPjTEYxx8=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=HDIw3bhsGM8oXJzHcf76+bRQ2R0oEx5rK04ttk0j1ofv6OnYIc0LPZ60YPnhvubzYVWoMsEsyuf7/SQlW3UWGrV2R94DUI6mufQzthpSo88biqwgZ5zDSKRmhP3e7HSL4iQCLf+yxfGXyNarr3P5rScSJbIaNC24jpDWRe8+Bw0= 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=kxKN7EC2; arc=none smtp.client-ip=113.46.200.227 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="kxKN7EC2" dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=BvR7YcTvE00lWHQbU4IS+hM0Xz5YMD3BeY0bCI8PRBw=; b=kxKN7EC2DVzEPw6j55Rh10QT6j69Hd+KHvk8DXRJAuGwYp0b+8ClSH2oAP/Qu/qMpM8Tn1l8W CEPoWjk1yUtmwZtnxxYxyGvrPraeB7X3bc1iHrdOeiL7L3Wl06JrHGqHy3X6aGlVpa6E7RIrKBe ZWKypiYoDri0zz2+a/HxdoA= Received: from mail.maildlp.com (unknown [172.19.163.15]) by canpmsgout12.his.huawei.com (SkyGuard) with ESMTPS id 4dZbvM0vmmznTXZ; Mon, 22 Dec 2025 19:46:23 +0800 (CST) Received: from dggpemf500011.china.huawei.com (unknown [7.185.36.131]) by mail.maildlp.com (Postfix) with ESMTPS id A385640539; Mon, 22 Dec 2025 19:48:33 +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; Mon, 22 Dec 2025 19:48:32 +0800 From: Jinjie Ruan To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v10 14/16] arm64: Inline el0_svc_common() Date: Mon, 22 Dec 2025 19:47:35 +0800 Message-ID: <20251222114737.1334364-15-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251222114737.1334364-1-ruanjinjie@huawei.com> References: <20251222114737.1334364-1-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: kwepems100001.china.huawei.com (7.221.188.238) 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. | 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 c440ccb2af62..45ceb8c4316a 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