From patchwork Thu Jul 11 14:25:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Chartre X-Patchwork-Id: 11040127 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 54248112C for ; Thu, 11 Jul 2019 14:28:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4421428A5A for ; Thu, 11 Jul 2019 14:28:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 375C428AC8; Thu, 11 Jul 2019 14:28:07 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D58D828A5A for ; Thu, 11 Jul 2019 14:28:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728869AbfGKO2D (ORCPT ); Thu, 11 Jul 2019 10:28:03 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:37516 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728529AbfGKO2C (ORCPT ); Thu, 11 Jul 2019 10:28:02 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x6BEO8Kr001447; Thu, 11 Jul 2019 14:26:44 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2018-07-02; bh=j5hNYpa6Ps4ofAY49xQlyVzas1I7FTDoeSXSCbctYus=; b=IZOylVirFWDOmZYSdGDrwFnJwm9CEHLxntE+KdhdKKVzqt1gSAfqZTTsVwqNsGzmUzgE PAj74VbhDOsq4BCutkFXYEtKMfHv6uDQN4EwPs/i8mhcZpVyCpdqZIKiMK3B0iniWbhc nCHcdwRFI9A6XWvL9fDPRjGkqCOObfWGxfS7XmG6Q9mdYcz4LapWwYkhkHzoQvWylY6M ysC+FaRK07kBZ2670+CaYM92TpCurpQy/wzZmTZFtJvwBPFzsFwFvWvwJU5DIkIsFNK3 zM5EMYBeH4z52ZPL8IQ1EjyFUcZnoz5RUscIoFGUEJ9sBLvHsPC7wF+/3bg5aRqA88yQ 5g== Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp2130.oracle.com with ESMTP id 2tjk2u0e1m-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 11 Jul 2019 14:26:44 +0000 Received: from achartre-desktop.fr.oracle.com (dhcp-10-166-106-34.fr.oracle.com [10.166.106.34]) by aserv0021.oracle.com (8.14.4/8.14.4) with ESMTP id x6BEPcuB021444; Thu, 11 Jul 2019 14:26:41 GMT From: Alexandre Chartre To: pbonzini@redhat.com, rkrcmar@redhat.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, kvm@vger.kernel.org, x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: konrad.wilk@oracle.com, jan.setjeeilers@oracle.com, liran.alon@oracle.com, jwadams@google.com, graf@amazon.de, rppt@linux.vnet.ibm.com, alexandre.chartre@oracle.com Subject: [RFC v2 18/26] rcu: Make percpu rcu_data non-static Date: Thu, 11 Jul 2019 16:25:30 +0200 Message-Id: <1562855138-19507-19-git-send-email-alexandre.chartre@oracle.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1562855138-19507-1-git-send-email-alexandre.chartre@oracle.com> References: <1562855138-19507-1-git-send-email-alexandre.chartre@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9314 signatures=668688 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907110162 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Make percpu rcu_data non-static so that it can be mapped into an isolation address space page-table. This will allow address space isolation to use RCU without faulting. Signed-off-by: Alexandre Chartre --- kernel/rcu/tree.c | 2 +- kernel/rcu/tree.h | 1 + 2 files changed, 2 insertions(+), 1 deletions(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 44dd3b4..2827b2b 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -126,7 +126,7 @@ static void rcu_check_gp_start_stall(struct rcu_node *rnp, struct rcu_data *rdp, #define rcu_eqs_special_exit() do { } while (0) #endif -static DEFINE_PER_CPU_SHARED_ALIGNED(struct rcu_data, rcu_data) = { +DEFINE_PER_CPU_SHARED_ALIGNED(struct rcu_data, rcu_data) = { .dynticks_nesting = 1, .dynticks_nmi_nesting = DYNTICK_IRQ_NONIDLE, .dynticks = ATOMIC_INIT(RCU_DYNTICK_CTRL_CTR), diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index 9790b58..a043fde 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -394,3 +394,4 @@ struct rcu_state { int rcu_dynticks_snap(struct rcu_data *rdp); void call_rcu(struct rcu_head *head, rcu_callback_t func); +DECLARE_PER_CPU_SHARED_ALIGNED(struct rcu_data, rcu_data);