From patchwork Fri Jun 28 11:20:47 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Stabellini X-Patchwork-Id: 2798391 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id B32539F245 for ; Fri, 28 Jun 2013 11:25:15 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2B2FE201D3 for ; Fri, 28 Jun 2013 11:25:14 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 650D0200E0 for ; Fri, 28 Jun 2013 11:25:12 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UsWlE-0005nF-JG; Fri, 28 Jun 2013 11:22:42 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UsWkQ-00027K-Az; Fri, 28 Jun 2013 11:21:50 +0000 Received: from smtp.citrix.com ([66.165.176.89]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UsWk7-00024F-1i for linux-arm-kernel@lists.infradead.org; Fri, 28 Jun 2013 11:21:34 +0000 X-IronPort-AV: E=Sophos;i="4.87,958,1363132800"; d="scan'208";a="34056480" Received: from accessns.citrite.net (HELO FTLPEX01CL02.citrite.net) ([10.9.154.239]) by FTLPIPO01.CITRIX.COM with ESMTP/TLS/AES128-SHA; 28 Jun 2013 11:21:00 +0000 Received: from ukmail1.uk.xensource.com (10.80.16.128) by smtprelay.citrix.com (10.13.107.79) with Microsoft SMTP Server id 14.2.342.4; Fri, 28 Jun 2013 07:20:59 -0400 Received: from kaball.uk.xensource.com ([10.80.2.59]) by ukmail1.uk.xensource.com with esmtp (Exim 4.69) (envelope-from ) id 1UsWjW-00088a-G7; Fri, 28 Jun 2013 12:20:54 +0100 From: Stefano Stabellini To: Subject: [PATCH v7 6/6] xen/arm: account for stolen ticks Date: Fri, 28 Jun 2013 12:20:47 +0100 Message-ID: <1372418447-24066-6-git-send-email-stefano.stabellini@eu.citrix.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130628_072131_278294_0D6CC1DD X-CRM114-Status: GOOD ( 11.38 ) X-Spam-Score: -8.2 (--------) Cc: linux@arm.linux.org.uk, Ian.Campbell@citrix.com, arnd@arndb.de, Stefano Stabellini , marc.zyngier@arm.com, catalin.marinas@arm.com, konrad.wilk@oracle.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, olof@lixom.net, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Register the runstate_memory_area with the hypervisor. Use pv_time_ops.steal_clock to account for stolen ticks. Signed-off-by: Stefano Stabellini --- Changes in v4: - don't use paravirt_steal_rq_enabled: we do not support retrieving stolen ticks for vcpus other than one we are running on. Changes in v3: - use BUG_ON and smp_processor_id. --- arch/arm/xen/enlighten.c | 21 +++++++++++++++++++++ 1 files changed, 21 insertions(+), 0 deletions(-) diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c index 13609e0..49839d8 100644 --- a/arch/arm/xen/enlighten.c +++ b/arch/arm/xen/enlighten.c @@ -14,7 +14,10 @@ #include #include #include +#include #include +#include +#include #include #include #include @@ -152,6 +155,19 @@ int xen_unmap_domain_mfn_range(struct vm_area_struct *vma, } EXPORT_SYMBOL_GPL(xen_unmap_domain_mfn_range); +unsigned long long xen_stolen_accounting(int cpu) +{ + struct vcpu_runstate_info state; + + BUG_ON(cpu != smp_processor_id()); + + xen_get_runstate_snapshot(&state); + + WARN_ON(state.state != RUNSTATE_running); + + return state.time[RUNSTATE_runnable] + state.time[RUNSTATE_offline]; +} + static void __init xen_percpu_init(void *unused) { struct vcpu_register_vcpu_info info; @@ -169,6 +185,8 @@ static void __init xen_percpu_init(void *unused) BUG_ON(err); per_cpu(xen_vcpu, cpu) = vcpup; + xen_setup_runstate_info(cpu); + enable_percpu_irq(xen_events_irq, 0); } @@ -300,6 +318,9 @@ static int __init xen_init_events(void) on_each_cpu(xen_percpu_init, NULL, 0); + pv_time_ops.steal_clock = xen_stolen_accounting; + static_key_slow_inc(¶virt_steal_enabled); + return 0; } postcore_initcall(xen_init_events);