From patchwork Fri Mar 31 18:05:22 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andre Przywara X-Patchwork-Id: 9657089 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 4FDBB60352 for ; Fri, 31 Mar 2017 18:05:49 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 44526286B7 for ; Fri, 31 Mar 2017 18:05:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 39322286EF; Fri, 31 Mar 2017 18:05:49 +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 D6398286F1 for ; Fri, 31 Mar 2017 18:05:48 +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 1cu0u1-0005zB-7x; Fri, 31 Mar 2017 18:04:01 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cu0tz-0005um-QU for xen-devel@lists.xenproject.org; Fri, 31 Mar 2017 18:03:59 +0000 Received: from [85.158.137.68] by server-12.bemta-3.messagelabs.com id 0C/F8-12861-F0A9ED85; Fri, 31 Mar 2017 18:03:59 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrCLMWRWlGSWpSXmKPExsVysyfVTZdv1r0 Ig8WntS2+b5nM5MDocfjDFZYAxijWzLyk/IoE1oynsx8yFTSKVLz8vYK1gfEAfxcjJ4eQwCZG idPtel2MXED2ckaJr63L2UASbAK6EjtuvmYGsUUEQiWeLvgOZHNwMAtUSnQvAusVFrCSuPJsA SOIzSKgKrGruZMJxOYVsJHouP2KBcSWEJCTaDh/H2wMJ1B8/q4frBB7rSUaPt1lnsDIvYCRYR WjenFqUVlqka6lXlJRZnpGSW5iZo6uoYGxXm5qcXFiempOYlKxXnJ+7iZGoG/rGRgYdzC+/ul 0iFGSg0lJlPd78b0IIb6k/JTKjMTijPii0pzU4kOMMhwcShK812cA5QSLUtNTK9Iyc4BBBpOW 4OBREuGVmgmU5i0uSMwtzkyHSJ1iVJQS5z0G0icAksgozYNrgwX2JUZZKWFeRgYGBiGegtSi3 MwSVPlXjOIcjErCvKog43ky80rgpr8CWswEtNji612QxSWJCCmpBsYUztmsn7KfCS86+uVW2G r9aufSsw8cpylrG7M7fO7rmynRVM+cusjjgq2NNc9sRcV/S02krKP/8vzU/vz1gIKe36u9jvO 8rFd1PleMv6e9d95JhXWT1l9OKJqdmXOt0dAtMKDi6fQ57deq5I9ExXlztfWsr+k42G4WVCu0 6OWrnesTdhUn2iqxFGckGmoxFxUnAgDaQ1ZWZwIAAA== X-Env-Sender: andre.przywara@arm.com X-Msg-Ref: server-16.tower-31.messagelabs.com!1490983438!85670894!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 3702 invoked from network); 31 Mar 2017 18:03:58 -0000 Received: from foss.arm.com (HELO foss.arm.com) (217.140.101.70) by server-16.tower-31.messagelabs.com with SMTP; 31 Mar 2017 18:03:58 -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 E92C780D; Fri, 31 Mar 2017 11:03:57 -0700 (PDT) Received: from e104803-lin.lan (unknown [10.1.207.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 11F003F59A; Fri, 31 Mar 2017 11:03:56 -0700 (PDT) From: Andre Przywara To: Julien Grall , Stefano Stabellini Date: Fri, 31 Mar 2017 19:05:22 +0100 Message-Id: <20170331180525.30038-24-andre.przywara@arm.com> X-Mailer: git-send-email 2.9.0 In-Reply-To: <20170331180525.30038-1-andre.przywara@arm.com> References: <20170331180525.30038-1-andre.przywara@arm.com> Cc: xen-devel@lists.xenproject.org, Shanker Donthineni , Vijay Kilari Subject: [Xen-devel] [PATCH v3 23/26] 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 0c479e0..24e7d17 100644 --- a/xen/arch/arm/vgic-v3-its.c +++ b/xen/arch/arm/vgic-v3-its.c @@ -419,6 +419,49 @@ 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); @@ -602,6 +645,9 @@ 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;