From patchwork Fri Apr 29 02:34:28 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: xinhui X-Patchwork-Id: 616569 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3qwyVb0txcz9t7R for ; Fri, 29 Apr 2016 12:35:51 +1000 (AEST) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 3qwyVb05n8zDqJ9 for ; Fri, 29 Apr 2016 12:35:51 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from e28smtp01.in.ibm.com (e28smtp01.in.ibm.com [125.16.236.1]) (using TLSv1.2 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3qwyTQ73wkzDq5d for ; Fri, 29 Apr 2016 12:34:50 +1000 (AEST) Received: from localhost by e28smtp01.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Fri, 29 Apr 2016 08:04:47 +0530 X-IBM-Helo: d28dlp03.in.ibm.com X-IBM-MailFrom: xinhui@linux.vnet.ibm.com X-IBM-RcptTo: linuxppc-dev@lists.ozlabs.org Received: from d28relay10.in.ibm.com (d28relay10.in.ibm.com [9.184.220.161]) by d28dlp03.in.ibm.com (Postfix) with ESMTP id 9CF31125805B for ; Fri, 29 Apr 2016 08:06:45 +0530 (IST) Received: from d28av01.in.ibm.com (d28av01.in.ibm.com [9.184.220.63]) by d28relay10.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u3T2YjQP22609966 for ; Fri, 29 Apr 2016 08:04:45 +0530 Received: from d28av01.in.ibm.com (localhost [127.0.0.1]) by d28av01.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u3T2Yf8l005244 for ; Fri, 29 Apr 2016 08:04:44 +0530 Received: from [10.0.2.15] (adminib-8ad6lrj.cn.ibm.com [9.123.228.157]) by d28av01.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u3T2YbIg005128; Fri, 29 Apr 2016 08:04:37 +0530 Message-ID: <5722C834.1030209@linux.vnet.ibm.com> Date: Fri, 29 Apr 2016 10:34:28 +0800 From: Pan Xinhui User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.8.0 MIME-Version: 1.0 To: Waiman Long Subject: Re: [PATCH resend] powerpc: enable qspinlock and its virtualization support References: <5721EC0E.8040506@linux.vnet.ibm.com> <57227BAA.7040807@hpe.com> In-Reply-To: <57227BAA.7040807@hpe.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16042902-4790-0000-0000-00000F481C88 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jeremy@goop.org, tglx@linutronix.de, peterz@infradead.org, Boqun Feng , rusty@rustcorp.com.au, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, chrisw@sous-sol.org, marc.zyngier@arm.com, Paul Mackerras , akataria@vmware.com, "Paul E. McKenney" , linuxppc-dev@lists.ozlabs.org, adam.buchbinder@gmail.com, gwshan@linux.vnet.ibm.com Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 2016年04月29日 05:07, Waiman Long wrote: > On 04/28/2016 06:55 AM, Pan Xinhui wrote: >> From: Pan Xinhui >> >> This patch aims to enable qspinlock on PPC. And on pseries platform, it also support >> paravirt qspinlock. >> >> Signed-off-by: Pan Xinhui >> --- >> arch/powerpc/include/asm/qspinlock.h | 37 +++++++++++++++ >> arch/powerpc/include/asm/qspinlock_paravirt.h | 36 +++++++++++++++ >> .../powerpc/include/asm/qspinlock_paravirt_types.h | 13 ++++++ >> arch/powerpc/include/asm/spinlock.h | 31 ++++++++----- >> arch/powerpc/include/asm/spinlock_types.h | 4 ++ >> arch/powerpc/kernel/paravirt.c | 52 ++++++++++++++++++++++ >> arch/powerpc/lib/locks.c | 32 +++++++++++++ >> arch/powerpc/platforms/pseries/setup.c | 5 +++ >> 8 files changed, 198 insertions(+), 12 deletions(-) >> create mode 100644 arch/powerpc/include/asm/qspinlock.h >> create mode 100644 arch/powerpc/include/asm/qspinlock_paravirt.h >> create mode 100644 arch/powerpc/include/asm/qspinlock_paravirt_types.h >> create mode 100644 arch/powerpc/kernel/paravirt.c >> >> > > This is just an enablement patch. You will also need a patch to activate qspinlock for, at lease, some PPC configs. Right? > yep, I want to enable these config and makefile at last. it just looks like diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 2da380f..ae7c2f1 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -50,6 +50,7 @@ obj-$(CONFIG_PPC_970_NAP) += idle_power4.o obj-$(CONFIG_PPC_P7_NAP) += idle_power7.o procfs-y := proc_powerpc.o obj-$(CONFIG_PROC_FS) += $(procfs-y) +obj-$(CONFIG_PARAVIRT_SPINLOCKS) += paravirt.o rtaspci-$(CONFIG_PPC64)-$(CONFIG_PCI) := rtas_pci.o obj-$(CONFIG_PPC_RTAS) += rtas.o rtas-rtc.o $(rtaspci-y-y) obj-$(CONFIG_PPC_RTAS_DAEMON) += rtasd.o diff --git a/arch/powerpc/platforms/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig index bec90fb..46632e4 100644 --- a/arch/powerpc/platforms/pseries/Kconfig +++ b/arch/powerpc/platforms/pseries/Kconfig @@ -21,6 +21,7 @@ config PPC_PSERIES select HOTPLUG_CPU if SMP select ARCH_RANDOM select PPC_DOORBELL + select ARCH_USE_QUEUED_SPINLOCKS default y config PPC_SPLPAR @@ -127,3 +128,11 @@ config HV_PERF_CTRS systems. 24x7 is available on Power 8 systems. If unsure, select Y. + +config PARAVIRT_SPINLOCKS + bool "Paravirtialization support for qspinlock" + depends on PPC_SPLPAR && QUEUED_SPINLOCKS + default y + help + If platform supports virtualization, for example PowerVM, this option + can let guest have a better performace.