Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754394AbbHJNdT (ORCPT ); Mon, 10 Aug 2015 09:33:19 -0400 Received: from mail-wi0-f173.google.com ([209.85.212.173]:36399 "EHLO mail-wi0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753929AbbHJNcD (ORCPT ); Mon, 10 Aug 2015 09:32:03 -0400 From: Eric Auger To: eric.auger@st.com, eric.auger@linaro.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, alex.williamson@redhat.com, pbonzini@redhat.com, feng.wu@intel.com Cc: linux-kernel@vger.kernel.org, patches@linaro.org, christoffer.dall@linaro.org, marc.zyngier@arm.com Subject: [PATCH v5 5/5] KVM: eventfd: add irq bypass consumer management Date: Mon, 10 Aug 2015 15:31:07 +0200 Message-Id: <1439213467-13668-6-git-send-email-eric.auger@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1439213467-13668-1-git-send-email-eric.auger@linaro.org> References: <1439213467-13668-1-git-send-email-eric.auger@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2766 Lines: 90 This patch adds the registration/unregistration of an irq_bypass_consumer on irqfd assignment/deassignment. Signed-off-by: Eric Auger Signed-off-by: Feng Wu --- v4 -> v5: - due to removal of static inline stubs, add #ifdef CONFIG_HAVE_KVM_IRQ_BYPASS around consumer registration/unregistration - add pr_info when registration fails v2 -> v3 (Feng Wu): - Use kvm_arch_irq_bypass_start - Remove kvm_arch_irq_bypass_update - Add member 'struct irq_bypass_producer *producer' in 'struct kvm_kernel_irqfd', it is needed by posted interrupt. - Remove 'irq_bypass_unregister_consumer' in kvm_irqfd_deassign() v1 -> v2: - populate of kvm and gsi removed - unregister the consumer on irqfd_shutdown --- include/linux/kvm_irqfd.h | 2 ++ virt/kvm/eventfd.c | 15 +++++++++++++++ 2 files changed, 17 insertions(+) diff --git a/include/linux/kvm_irqfd.h b/include/linux/kvm_irqfd.h index f926b39..0c1de05 100644 --- a/include/linux/kvm_irqfd.h +++ b/include/linux/kvm_irqfd.h @@ -64,6 +64,8 @@ struct kvm_kernel_irqfd { struct list_head list; poll_table pt; struct work_struct shutdown; + struct irq_bypass_consumer consumer; + struct irq_bypass_producer *producer; }; #endif /* __LINUX_KVM_IRQFD_H */ diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index 647ffb8..d7a230f 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include @@ -140,6 +141,9 @@ irqfd_shutdown(struct work_struct *work) /* * It is now safe to release the object's resources */ +#ifdef CONFIG_HAVE_KVM_IRQ_BYPASS + irq_bypass_unregister_consumer(&irqfd->consumer); +#endif eventfd_ctx_put(irqfd->eventfd); kfree(irqfd); } @@ -379,6 +383,17 @@ kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args) * we might race against the POLLHUP */ fdput(f); +#ifdef CONFIG_HAVE_KVM_IRQ_BYPASS + irqfd->consumer.token = (void *)irqfd->eventfd; + irqfd->consumer.add_producer = kvm_arch_irq_bypass_add_producer; + irqfd->consumer.del_producer = kvm_arch_irq_bypass_del_producer; + irqfd->consumer.stop = kvm_arch_irq_bypass_stop; + irqfd->consumer.start = kvm_arch_irq_bypass_start; + ret = irq_bypass_register_consumer(&irqfd->consumer); + if (ret) + pr_info("irq bypass consumer (token %p) registration fails: %d\n", + irqfd->consumer.token, ret); +#endif return 0; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/