From patchwork Mon Apr 3 20:28:26 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andre Przywara X-Patchwork-Id: 9660541 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 61F1A6032D for ; Mon, 3 Apr 2017 20:28:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 53E8E28418 for ; Mon, 3 Apr 2017 20:28:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4780628403; Mon, 3 Apr 2017 20:28:50 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 083E128403 for ; Mon, 3 Apr 2017 20:28:48 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cv8Z2-0005Sx-Bt; Mon, 03 Apr 2017 20:27:00 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cv8Z0-0005Nj-Jd for xen-devel@lists.xenproject.org; Mon, 03 Apr 2017 20:26:58 +0000 Received: from [85.158.137.68] by server-4.bemta-3.messagelabs.com id 10/95-03705-110B2E85; Mon, 03 Apr 2017 20:26:57 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrKLMWRWlGSWpSXmKPExsVysyfVTVdww6M Ig+vT+C2+b5nM5MDocfjDFZYAxijWzLyk/IoE1ozWAxtYChpFKg5OSWlgPMDfxcjJISSwiVHi wUTFLkYuIHs5o8TqxW0sIAk2AV2JHTdfM4PYIgKhEk8XfAezmQWUJPafvcYIYgsLWElcXDSLC cRmEVCVWLe0HayXV8Ba4suVNrC4hICcRMP5+2C9nEDx1o9HGSEWW0lMeNjENIGRewEjwypGje LUorLUIl0jQ72kosz0jJLcxMwcXUMDY73c1OLixPTUnMSkYr3k/NxNjEDv1jMwMO5g7Nnrd4h RkoNJSZRXfdKjCCG+pPyUyozE4oz4otKc1OJDjDIcHEoSvMfWAeUEi1LTUyvSMnOAYQaTluDg URLh3QyS5i0uSMwtzkyHSJ1iVJQS580ASQiAJDJK8+DaYKF9iVFWSpiXkYGBQYinILUoN7MEV f4VozgHo5Iw7w2QKTyZeSVw018BLWYCWvzkzkOQxSWJCCmpBkahh3d4pb9d8qwRXHezeuWySU tr7KZyR54oW3Hb+f0dlbz0gC/h793+bXDMj/2fExGnIBo+hemb/iTx/Csfkt/Eya5+mJbAlRp ie/aucMMCXs55c2RDCjstVgkz7jeacXVB7+FL9q+ben7skvXU/Nz55Vl6eCCjfPt/fceV3F8C 13qsVz7RIKnEUpyRaKjFXFScCACgeCCiaAIAAA== X-Env-Sender: andre.przywara@arm.com X-Msg-Ref: server-2.tower-31.messagelabs.com!1491251216!82209951!1 X-Originating-IP: [217.140.101.70] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 9.2.3; banners=-,-,- X-VirusChecked: Checked Received: (qmail 21703 invoked from network); 3 Apr 2017 20:26:57 -0000 Received: from foss.arm.com (HELO foss.arm.com) (217.140.101.70) by server-2.tower-31.messagelabs.com with SMTP; 3 Apr 2017 20:26:57 -0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 7B71080D; Mon, 3 Apr 2017 13:26:56 -0700 (PDT) Received: from e104803-lin.lan (unknown [10.1.207.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id BA1043F4FF; Mon, 3 Apr 2017 13:26:55 -0700 (PDT) From: Andre Przywara To: Julien Grall , Stefano Stabellini Date: Mon, 3 Apr 2017 21:28:26 +0100 Message-Id: <20170403202829.7278-25-andre.przywara@arm.com> X-Mailer: git-send-email 2.9.0 In-Reply-To: <20170403202829.7278-1-andre.przywara@arm.com> References: <20170403202829.7278-1-andre.przywara@arm.com> Cc: xen-devel@lists.xenproject.org Subject: [Xen-devel] [PATCH v4 24/27] ARM: vITS: handle INVALL command X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP The INVALL command instructs an ITS to invalidate the configuration data for all LPIs associated with a given redistributor (read: VCPU). This is nasty to emulate exactly with our architecture, so we just scan the pending table and inject _every_ LPI found there that got enabled. Signed-off-by: Andre Przywara --- xen/arch/arm/vgic-v3-its.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/xen/arch/arm/vgic-v3-its.c b/xen/arch/arm/vgic-v3-its.c index 920c437..35a0730 100644 --- a/xen/arch/arm/vgic-v3-its.c +++ b/xen/arch/arm/vgic-v3-its.c @@ -425,6 +425,49 @@ static int its_handle_inv(struct virt_its *its, uint64_t *cmdptr) return 0; } +/* + * INVALL updates the per-LPI configuration status for every LPI mapped to + * a particular redistributor. + * We iterate over all mapped LPIs in our radix tree and update those. + */ +static int its_handle_invall(struct virt_its *its, uint64_t *cmdptr) +{ + uint32_t collid = its_cmd_get_collection(cmdptr); + struct vcpu *vcpu; + struct pending_irq *pirqs[16]; + uint32_t vlpi = 0; + int nr_lpis, i; + + /* We may want to revisit this implementation for DomUs. */ + ASSERT(is_hardware_domain(its->d)); + + spin_lock(&its->its_lock); + vcpu = get_vcpu_from_collection(its, collid); + spin_unlock(&its->its_lock); + + read_lock(&its->d->arch.vgic.pend_lpi_tree_lock); + + do { + nr_lpis = radix_tree_gang_lookup(&its->d->arch.vgic.pend_lpi_tree, + (void **)pirqs, vlpi, + ARRAY_SIZE(pirqs)); + + for ( i = 0; i < nr_lpis; i++ ) + { + vlpi = pirqs[i]->irq; + update_lpi_enabled_status(its, vcpu, vlpi); + } + + /* Protect from overflow when incrementing 0xffffffff */ + if ( vlpi == ~0 || ++vlpi < its->d->arch.vgic.nr_lpis ) + break; + } while ( nr_lpis == ARRAY_SIZE(pirqs)); + + read_unlock(&its->d->arch.vgic.pend_lpi_tree_lock); + + return 0; +} + static int its_handle_mapc(struct virt_its *its, uint64_t *cmdptr) { uint32_t collid = its_cmd_get_collection(cmdptr); @@ -608,6 +651,9 @@ static int vgic_its_handle_cmds(struct domain *d, struct virt_its *its, case GITS_CMD_INV: ret = its_handle_inv(its, cmdptr); break; + case GITS_CMD_INVALL: + ret = its_handle_invall(its, cmdptr); + break; case GITS_CMD_MAPC: ret = its_handle_mapc(its, cmdptr); break;