From patchwork Wed Feb 26 18:39:50 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Stabellini X-Patchwork-Id: 25402 Return-Path: X-Original-To: linaro@patches.linaro.org Delivered-To: linaro@patches.linaro.org Received: from mail-ob0-f199.google.com (mail-ob0-f199.google.com [209.85.214.199]) by ip-10-151-82-157.ec2.internal (Postfix) with ESMTPS id 1A5EF20715 for ; Wed, 26 Feb 2014 18:42:09 +0000 (UTC) Received: by mail-ob0-f199.google.com with SMTP id uy5sf4362019obc.2 for ; Wed, 26 Feb 2014 10:42:08 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:delivered-to:from:to:date:message-id:in-reply-to :references:mime-version:cc:subject:precedence:list-id :list-unsubscribe:list-post:list-help:list-subscribe:sender :errors-to:x-original-sender:x-original-authentication-results :mailing-list:list-archive:content-type:content-transfer-encoding; bh=OHqRhY0I5f3KdTTvYLLyERDi3nwkI/7udHfRIK8mjO0=; b=BX49BHGzgfk9hjLi6szwgkztAc+yOHW3HJznnZIcLyIxB4p0eaNGiTPfG5dCh/VjFv qmdyqFzgVqadnyXOUz/qiWYCntVRjwIYjgWj5XOq6ut9ooIfswSMO9Dk2FfP6rTROFCj YgXPyrWoexgRuzgwyV0ajwINQE6Q4yT4ARID8cjmN8aGzyVhGDwEugtQoXjPNLjOYo5w d2poSox+K874tDyU74En8TmFtGEpd21RMDHjlA/jZLNuAkcDsrwJo+i8NPOVEar/rTkr UJf52WjqCr5OavBEvl78tayCIu248EEdBoD4MpW+gFo7ft5YVrR7xZ5NZowbeNFuprEp z4UA== X-Gm-Message-State: ALoCoQmhOrGTT3C3FodfP3c/XMNEkjgRmSUf2N/nDqRIYwLJ+M9dXoKkZWwZajaO5joVQZwbnK8a X-Received: by 10.42.75.10 with SMTP id y10mr399129icj.19.1393440128621; Wed, 26 Feb 2014 10:42:08 -0800 (PST) X-BeenThere: patchwork-forward@linaro.org Received: by 10.140.23.175 with SMTP id 44ls362906qgp.12.gmail; Wed, 26 Feb 2014 10:42:08 -0800 (PST) X-Received: by 10.58.123.70 with SMTP id ly6mr6949475veb.26.1393440128477; Wed, 26 Feb 2014 10:42:08 -0800 (PST) Received: from mail-ve0-f182.google.com (mail-ve0-f182.google.com [209.85.128.182]) by mx.google.com with ESMTPS id yv5si457791veb.64.2014.02.26.10.42.08 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 26 Feb 2014 10:42:08 -0800 (PST) Received-SPF: neutral (google.com: 209.85.128.182 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) client-ip=209.85.128.182; Received: by mail-ve0-f182.google.com with SMTP id jy13so2655573veb.13 for ; Wed, 26 Feb 2014 10:42:08 -0800 (PST) X-Received: by 10.52.166.9 with SMTP id zc9mr5786905vdb.16.1393440128370; Wed, 26 Feb 2014 10:42:08 -0800 (PST) X-Forwarded-To: patchwork-forward@linaro.org X-Forwarded-For: patch@linaro.org patchwork-forward@linaro.org Delivered-To: patch@linaro.org Received: by 10.220.174.196 with SMTP id u4csp46878vcz; Wed, 26 Feb 2014 10:42:08 -0800 (PST) X-Received: by 10.52.84.102 with SMTP id x6mr836976vdy.49.1393440127660; Wed, 26 Feb 2014 10:42:07 -0800 (PST) Received: from lists.xen.org (lists.xen.org. [50.57.142.19]) by mx.google.com with ESMTPS id uw4si462605vdc.1.2014.02.26.10.42.06 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Wed, 26 Feb 2014 10:42:07 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of xen-devel-bounces@lists.xen.org designates 50.57.142.19 as permitted sender) client-ip=50.57.142.19; Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1WIjP5-0007ve-IE; Wed, 26 Feb 2014 18:40:23 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1WIjOx-0007tj-9c for xen-devel@lists.xensource.com; Wed, 26 Feb 2014 18:40:15 +0000 Received: from [85.158.143.35:7528] by server-1.bemta-4.messagelabs.com id 9D/46-31661-E053E035; Wed, 26 Feb 2014 18:40:14 +0000 X-Env-Sender: Stefano.Stabellini@citrix.com X-Msg-Ref: server-6.tower-21.messagelabs.com!1393440011!8519574!3 X-Originating-IP: [66.165.176.63] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogNjYuMTY1LjE3Ni42MyA9PiAzMDYwNDg=\n X-StarScan-Received: X-StarScan-Version: 6.9.16; banners=-,-,- X-VirusChecked: Checked Received: (qmail 28595 invoked from network); 26 Feb 2014 18:40:14 -0000 Received: from smtp02.citrix.com (HELO SMTP02.CITRIX.COM) (66.165.176.63) by server-6.tower-21.messagelabs.com with RC4-SHA encrypted SMTP; 26 Feb 2014 18:40:14 -0000 X-IronPort-AV: E=Sophos;i="4.97,549,1389744000"; d="scan'208";a="104388721" Received: from accessns.citrite.net (HELO FTLPEX01CL03.citrite.net) ([10.9.154.239]) by FTLPIPO02.CITRIX.COM with ESMTP; 26 Feb 2014 18:40:11 +0000 Received: from ukmail1.uk.xensource.com (10.80.16.128) by smtprelay.citrix.com (10.13.107.80) with Microsoft SMTP Server id 14.2.342.4; Wed, 26 Feb 2014 13:40:10 -0500 Received: from kaball.uk.xensource.com ([10.80.2.59]) by ukmail1.uk.xensource.com with esmtp (Exim 4.69) (envelope-from ) id 1WIjOm-0004S3-7i; Wed, 26 Feb 2014 18:40:04 +0000 From: Stefano Stabellini To: Date: Wed, 26 Feb 2014 18:39:50 +0000 Message-ID: <1393439997-26936-5-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-DLP: MIA1 Cc: julien.grall@citrix.com, jtd@galois.com, Ian.Campbell@citrix.com, Stefano Stabellini Subject: [Xen-devel] [PATCH-4.5 v3 05/12] xen/arm: set GICH_HCR_UIE if all the LRs are in use X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: List-Unsubscribe: , List-Post: , List-Help: , List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: stefano.stabellini@eu.citrix.com X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.128.182 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Archive: On return to guest, if there are no free LRs and we still have more interrupt to inject, set GICH_HCR_UIE so that we are going to receive a maintenance interrupt when no pending interrupts are present in the LR registers. The maintenance interrupt handler won't do anything anymore, but receiving the interrupt is going to cause gic_inject to be called on return to guest that is going to clear the old LRs and inject new interrupts. Signed-off-by: Stefano Stabellini --- Changes in v2: - disable/enable the GICH_HCR_UIE bit in GICH_HCR; - only enable GICH_HCR_UIE if this_cpu(lr_mask) == ((1 << nr_lrs) - 1). --- xen/arch/arm/gic.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/xen/arch/arm/gic.c b/xen/arch/arm/gic.c index 15e5f91..371ebd8 100644 --- a/xen/arch/arm/gic.c +++ b/xen/arch/arm/gic.c @@ -789,6 +789,12 @@ void gic_inject(void) vgic_vcpu_inject_irq(current, current->domain->arch.evtchn_irq); gic_restore_pending_irqs(current); + + if ( !list_empty(¤t->arch.vgic.lr_pending) && + this_cpu(lr_mask) == ((1 << nr_lrs) - 1) ) + GICH[GICH_HCR] |= GICH_HCR_UIE; + else + GICH[GICH_HCR] &= ~GICH_HCR_UIE; } int gic_route_irq_to_guest(struct domain *d, const struct dt_irq *irq,