From patchwork Wed Sep 16 08:50:05 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wu, Feng" X-Patchwork-Id: 7192831 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 79DC6BEEC1 for ; Wed, 16 Sep 2015 09:07:58 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A988820884 for ; Wed, 16 Sep 2015 09:07:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AB32A2087D for ; Wed, 16 Sep 2015 09:07:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752797AbbIPJHB (ORCPT ); Wed, 16 Sep 2015 05:07:01 -0400 Received: from mga14.intel.com ([192.55.52.115]:38797 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753095AbbIPJEZ (ORCPT ); Wed, 16 Sep 2015 05:04:25 -0400 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga103.fm.intel.com with ESMTP; 16 Sep 2015 02:04:24 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,538,1437462000"; d="scan'208";a="790482353" Received: from feng-bdw-de-pi.bj.intel.com ([10.238.154.58]) by fmsmga001.fm.intel.com with ESMTP; 16 Sep 2015 02:04:22 -0700 From: Feng Wu To: pbonzini@redhat.com, alex.williamson@redhat.com, joro@8bytes.org, mtosatti@redhat.com Cc: eric.auger@linaro.org, kvm@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Feng Wu Subject: [PATCH v8 09/13] KVM: Add an arch specific hooks in 'struct kvm_kernel_irqfd' Date: Wed, 16 Sep 2015 16:50:05 +0800 Message-Id: <1442393409-2623-10-git-send-email-feng.wu@intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1442393409-2623-1-git-send-email-feng.wu@intel.com> References: <1442393409-2623-1-git-send-email-feng.wu@intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_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 This patch adds an arch specific hooks 'arch_update' in 'struct kvm_kernel_irqfd'. On Intel side, it is used to update the IRTE when VT-d posted-interrupts is used. Signed-off-by: Feng Wu --- v8: - Remove callback .arch_update() - Remove kvm_arch_irqfd_init() - Call kvm_arch_update_irqfd_routing() instead. arch/x86/kvm/x86.c | 7 +++++++ include/linux/kvm_host.h | 2 ++ virt/kvm/eventfd.c | 19 ++++++++++++++++++- 3 files changed, 27 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 79dac02..e189a94 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -8293,6 +8293,13 @@ void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons, " fails: %d\n", irqfd->consumer.token, ret); } +int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq, + uint32_t guest_irq, bool set) +{ + return !kvm_x86_ops->update_pi_irte ? -EINVAL : + kvm_x86_ops->update_pi_irte(kvm, host_irq, guest_irq, set); +} + EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 5f183fb..feba1fb 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1174,6 +1174,8 @@ void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *, struct irq_bypass_producer *); void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *); void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *); +int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq, + uint32_t guest_irq, bool set); #endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */ #endif diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index c0a56a1..89c9635 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -266,6 +266,12 @@ void __attribute__((weak)) kvm_arch_irq_bypass_start( struct irq_bypass_consumer *cons) { } +int __attribute__((weak)) kvm_arch_update_irqfd_routing( + struct kvm *kvm, unsigned int host_irq, + uint32_t guest_irq, bool set) +{ + return 0; +} #endif static int @@ -582,13 +588,24 @@ kvm_irqfd_release(struct kvm *kvm) */ void kvm_irq_routing_update(struct kvm *kvm) { + int ret; struct kvm_kernel_irqfd *irqfd; spin_lock_irq(&kvm->irqfds.lock); - list_for_each_entry(irqfd, &kvm->irqfds.items, list) + list_for_each_entry(irqfd, &kvm->irqfds.items, list) { irqfd_update(kvm, irqfd); +#ifdef CONFIG_HAVE_KVM_IRQ_BYPASS + if (irqfd->producer) { + ret = kvm_arch_update_irqfd_routing( + irqfd->kvm, irqfd->producer->irq, + irqfd->gsi, 1); + WARN_ON(ret); + } +#endif + } + spin_unlock_irq(&kvm->irqfds.lock); }