Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756426AbbGGJOA (ORCPT ); Tue, 7 Jul 2015 05:14:00 -0400 Received: from mga03.intel.com ([134.134.136.65]:19775 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753148AbbGGJNw convert rfc822-to-8bit (ORCPT ); Tue, 7 Jul 2015 05:13:52 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,422,1432623600"; d="scan'208";a="742032436" From: "Wu, Feng" To: Eric Auger , "eric.auger@st.com" , "linux-arm-kernel@lists.infradead.org" , "kvmarm@lists.cs.columbia.edu" , "kvm@vger.kernel.org" , "christoffer.dall@linaro.org" , "marc.zyngier@arm.com" , "alex.williamson@redhat.com" , "pbonzini@redhat.com" , "avi.kivity@gmail.com" , "mtosatti@redhat.com" , "joro@8bytes.org" , "b.reynal@virtualopensystems.com" CC: "linux-kernel@vger.kernel.org" , "patches@linaro.org" , "Wu, Feng" Subject: RE: [RFC v2 6/6] KVM: eventfd: add irq bypass consumer management Thread-Topic: [RFC v2 6/6] KVM: eventfd: add irq bypass consumer management Thread-Index: AQHQuJQ80x3fK2K6mUqVaRgRie6ohp3PuNJw Date: Tue, 7 Jul 2015 09:13:44 +0000 Message-ID: References: <1436184692-20927-1-git-send-email-eric.auger@linaro.org> <1436184692-20927-7-git-send-email-eric.auger@linaro.org> <559B966F.4010508@linaro.org> In-Reply-To: <559B966F.4010508@linaro.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.239.127.40] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4831 Lines: 144 > -----Original Message----- > From: Eric Auger [mailto:eric.auger@linaro.org] > Sent: Tuesday, July 07, 2015 5:06 PM > To: Wu, Feng; eric.auger@st.com; linux-arm-kernel@lists.infradead.org; > kvmarm@lists.cs.columbia.edu; kvm@vger.kernel.org; > christoffer.dall@linaro.org; marc.zyngier@arm.com; > alex.williamson@redhat.com; pbonzini@redhat.com; avi.kivity@gmail.com; > mtosatti@redhat.com; joro@8bytes.org; b.reynal@virtualopensystems.com > Cc: linux-kernel@vger.kernel.org; patches@linaro.org > Subject: Re: [RFC v2 6/6] KVM: eventfd: add irq bypass consumer management > > Hi Feng, > On 07/07/2015 10:47 AM, Wu, Feng wrote: > > > > > >> -----Original Message----- > >> From: Eric Auger [mailto:eric.auger@linaro.org] > >> Sent: Monday, July 06, 2015 8:12 PM > >> To: eric.auger@st.com; eric.auger@linaro.org; > >> linux-arm-kernel@lists.infradead.org; kvmarm@lists.cs.columbia.edu; > >> kvm@vger.kernel.org; christoffer.dall@linaro.org; marc.zyngier@arm.com; > >> alex.williamson@redhat.com; pbonzini@redhat.com; avi.kivity@gmail.com; > >> mtosatti@redhat.com; Wu, Feng; joro@8bytes.org; > >> b.reynal@virtualopensystems.com > >> Cc: linux-kernel@vger.kernel.org; patches@linaro.org > >> Subject: [RFC v2 6/6] KVM: eventfd: add irq bypass consumer management > >> > >> This patch adds the registration/unregistration of an > >> irq_bypass_consumer on irqfd assignment/deassignment. > >> > >> Signed-off-by: Eric Auger > >> > >> --- > >> > >> v1 -> v2: > >> - populate of kvm and gsi removed > >> - unregister the consumer on irqfd_shutdown > >> --- > >> include/linux/kvm_irqfd.h | 1 + > >> virt/kvm/eventfd.c | 14 +++++++++++--- > >> 2 files changed, 12 insertions(+), 3 deletions(-) > >> > >> diff --git a/include/linux/kvm_irqfd.h b/include/linux/kvm_irqfd.h > >> index f926b39..3c0bd07 100644 > >> --- a/include/linux/kvm_irqfd.h > >> +++ b/include/linux/kvm_irqfd.h > >> @@ -64,6 +64,7 @@ struct kvm_kernel_irqfd { > >> struct list_head list; > >> poll_table pt; > >> struct work_struct shutdown; > >> + struct irq_bypass_consumer consumer; > >> }; > >> > >> #endif /* __LINUX_KVM_IRQFD_H */ > >> diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c > >> index b79dc61..9452754 100644 > >> --- a/virt/kvm/eventfd.c > >> +++ b/virt/kvm/eventfd.c > >> @@ -35,6 +35,7 @@ > >> #include > >> #include > >> #include > >> +#include > >> #include > >> > >> #include > >> @@ -140,6 +141,7 @@ irqfd_shutdown(struct work_struct *work) > >> /* > >> * It is now safe to release the object's resources > >> */ > >> + irq_bypass_unregister_consumer(&irqfd->consumer); > >> eventfd_ctx_put(irqfd->eventfd); > >> kfree(irqfd); > >> } > >> @@ -380,7 +382,14 @@ kvm_irqfd_assign(struct kvm *kvm, struct > kvm_irqfd > >> *args) > >> */ > >> fdput(f); > >> > >> - /* irq_bypass_register_consumer(); */ > >> + 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.resume = kvm_arch_irq_bypass_resume; > >> + irqfd->consumer.update = kvm_arch_irq_bypass_update; > >> + ret = irq_bypass_register_consumer(&irqfd->consumer); > >> + WARN_ON(ret); > >> > >> return 0; > >> > >> @@ -481,8 +490,6 @@ kvm_irqfd_deassign(struct kvm *kvm, struct > kvm_irqfd > >> *args) > >> struct kvm_kernel_irqfd *irqfd, *tmp; > >> struct eventfd_ctx *eventfd; > >> > >> - /* irq_bypass_unregister_consumer() */ > >> - > >> eventfd = eventfd_ctx_fdget(args->fd); > >> if (IS_ERR(eventfd)) > >> return PTR_ERR(eventfd); > >> @@ -501,6 +508,7 @@ kvm_irqfd_deassign(struct kvm *kvm, struct > kvm_irqfd > >> *args) > >> irqfd->irq_entry.type = 0; > >> write_seqcount_end(&irqfd->irq_entry_sc); > >> irqfd_deactivate(irqfd); > >> + irq_bypass_unregister_consumer(&irqfd->consumer); > > > > consumer is unregistered in irqfd_shutdown(), why need we do it here? > Yes you're right, this is not needed anymore. Did things too hastily :-( > > Otherwise does that isolated series fit your needs for posted interrupts > and match your expectations with regards to split/reusability? Basically, they are fine. I am trying to rebase my patch on top of it. If I encounter any issues, I will discuss it here ASAP. Thanks, Feng > > Eric > > > > > Thanks, > > Feng > > > >> } > >> } > >> > >> -- > >> 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/