From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=DATE_IN_PAST_12_24, DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2BDB8C10F14 for ; Tue, 8 Oct 2019 09:02:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 004E4206B6 for ; Tue, 8 Oct 2019 09:02:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="kP9wKZ16" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730093AbfJHJCX (ORCPT ); Tue, 8 Oct 2019 05:02:23 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:60750 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730036AbfJHJCX (ORCPT ); Tue, 8 Oct 2019 05:02:23 -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 x988hUmt189402; Tue, 8 Oct 2019 09:00:21 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-2019-08-05; bh=6zx+HXQZEXKowQg35WPZrfCHzQ03y1NjjMoY3ktOXVM=; b=kP9wKZ16IfTRx7GPFzL6M8xdq6f1Et1QYWA7EhfgP/SpRyJ2BFHv/fS7ThqH8Cqa9bgc iqfQWRL51QmzgZtbKuPCEJyTIKWZt5lkfMBOkZQM+XE/eyix6n0K8bdeewiQJ6+ydlGC N8Qb6MpAx8GzuK8RM3n7BTVLvlDy5aHEvO4WwZ3FVRKQ6huoGEE5Rkh1OFYfKn2jt+1W D4ePIU6IaPbnOdjdb8r+a7V2SwUhajeSplG286knf9QfnmpovLhgDZ/PeLtduDHbJWvY k5O3KECvaVxrDN9Dx1pEyU/04Jc9NWgwz6kEu1+fRIf03eFX98277WGgA7uzGKnW8GwQ dA== Received: from aserp3030.oracle.com (aserp3030.oracle.com [141.146.126.71]) by userp2130.oracle.com with ESMTP id 2vejkuc4xp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 08 Oct 2019 09:00:20 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x988hgr3108039; Tue, 8 Oct 2019 09:00:19 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3030.oracle.com with ESMTP id 2vg1yvkdvk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 08 Oct 2019 09:00:19 +0000 Received: from abhmp0004.oracle.com (abhmp0004.oracle.com [141.146.116.10]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x9890HCW005717; Tue, 8 Oct 2019 09:00:18 GMT Received: from z2.cn.oracle.com (/10.182.71.205) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 08 Oct 2019 02:00:17 -0700 From: Zhenzhong Duan To: linux-kernel@vger.kernel.org Cc: vkuznets@redhat.com, linux-hyperv@vger.kernel.org, kvm@vger.kernel.org, kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, sashal@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, pbonzini@redhat.com, rkrcmar@redhat.com, sean.j.christopherson@intel.com, wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org, boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org, peterz@infradead.org, Zhenzhong Duan , Jonathan Corbet , "H. Peter Anvin" Subject: [PATCH v5 5/5] x86/hyperv: Mark "hv_nopvspin" parameter obsolete Date: Mon, 7 Oct 2019 17:04:31 +0800 Message-Id: <1570439071-9814-6-git-send-email-zhenzhong.duan@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1570439071-9814-1-git-send-email-zhenzhong.duan@oracle.com> References: <1570439071-9814-1-git-send-email-zhenzhong.duan@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9403 signatures=668684 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910080089 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9403 signatures=668684 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=1 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=8.0.1-1908290000 definitions=main-1910080089 Sender: linux-hyperv-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org Map "hv_nopvspin" to "nopvspin". Signed-off-by: Zhenzhong Duan Reviewed-by: Michael Kelley Cc: Jonathan Corbet Cc: "K. Y. Srinivasan" Cc: Haiyang Zhang Cc: Stephen Hemminger Cc: Sasha Levin Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: "H. Peter Anvin" --- Documentation/admin-guide/kernel-parameters.txt | 6 +++++- arch/x86/hyperv/hv_spinlock.c | 4 ++++ 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index df1eacc..08c6d34 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1436,6 +1436,10 @@ hv_nopvspin [X86,HYPER_V] Disables the paravirt spinlock optimizations which allow the hypervisor to 'idle' the guest on lock contention. + This parameter is obsoleted by "nopvspin" + parameter, which has equivalent effect for + HYPER_V platform. + keep_bootcon [KNL] Do not unregister boot console at start. This is only @@ -5331,7 +5335,7 @@ as generic guest with no PV drivers. Currently support XEN HVM, KVM, HYPER_V and VMWARE guest. - nopvspin [X86,XEN,KVM] + nopvspin [X86,XEN,KVM,HYPER_V] Disables the qspinlock slow path using PV optimizations which allow the hypervisor to 'idle' the guest on lock contention. diff --git a/arch/x86/hyperv/hv_spinlock.c b/arch/x86/hyperv/hv_spinlock.c index 07f21a0..47c7d6c 100644 --- a/arch/x86/hyperv/hv_spinlock.c +++ b/arch/x86/hyperv/hv_spinlock.c @@ -64,6 +64,9 @@ __visible bool hv_vcpu_is_preempted(int vcpu) void __init hv_init_spinlocks(void) { + if (nopvspin) + hv_pvspin = false; + if (!hv_pvspin || !apic || !(ms_hyperv.hints & HV_X64_CLUSTER_IPI_RECOMMENDED) || !(ms_hyperv.features & HV_X64_MSR_GUEST_IDLE_AVAILABLE)) { @@ -82,6 +85,7 @@ void __init hv_init_spinlocks(void) static __init int hv_parse_nopvspin(char *arg) { + pr_notice("\"hv_nopvspin\" is deprecated, please use \"nopvspin\" instead\n"); hv_pvspin = false; return 0; } -- 1.8.3.1