From: Paolo Bonzini <pbonzini@redhat.com>
To: Peter Xu <peterx@redhat.com>
Cc: Eric Auger <eric.auger@redhat.com>,
Alex Williamson <alex.williamson@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
qemu-devel@nongnu.org
Subject: Re: [PATCH 4/5] KVM: Kick resamplefd for split kernel irqchip
Date: Fri, 28 Feb 2020 16:24:21 +0100 [thread overview]
Message-ID: <deabda06-61b5-6d6c-aaa3-6b9553f2fbcb@redhat.com> (raw)
In-Reply-To: <20200228145800.GR180973@xz-x1>
On 28/02/20 15:58, Peter Xu wrote:
> Yes I was thinking it the same way, however... I noticed that VFIO
> will even mask edge INTx after getting IRQ (vfio_intx_handler).
INTx is always level-triggered so that's okay.
> And if look into current KVM kernel implementation, it has done the
> same logic to ack edge triggerred irqs (kvm_ioapic_update_eoi_one),
> we should logically ack it here too even for edge-triggered?
Right, that's because it's using ack notifiers also for in-kernel PIT
and for RTC. But yeah, it makes sense to have userspace IOAPIC
resamplefd match the functionality of the kernel ones. Thanks!
Paolo
next prev parent reply other threads:[~2020-02-28 15:25 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-26 22:50 [PATCH 0/5] vfio/pci: Fix up breakage against split irqchip and INTx Peter Xu
2020-02-26 22:50 ` [PATCH 1/5] vfio/pci: Disable INTx fast path if using split irqchip Peter Xu
2020-02-27 16:53 ` Auger Eric
2020-02-27 17:10 ` Peter Xu
2020-02-26 22:50 ` [PATCH 2/5] vfio/pci: Use kvm_irqchip_add_irqfd_notifier_gsi() for irqfds Peter Xu
2020-02-27 11:04 ` Auger Eric
2020-02-27 16:41 ` Cornelia Huck
2020-02-26 22:54 ` [PATCH 3/5] KVM: Pass EventNotifier into kvm_irqchip_assign_irqfd Peter Xu
2020-02-27 17:01 ` Auger Eric
2020-02-26 22:55 ` [PATCH 4/5] KVM: Kick resamplefd for split kernel irqchip Peter Xu
2020-02-27 17:00 ` [PATCH v1.1 " Peter Xu
2020-02-27 17:18 ` Peter Xu
2020-02-27 17:42 ` Auger Eric
2020-02-27 18:00 ` Peter Xu
2020-02-27 18:22 ` Auger Eric
2020-02-27 19:19 ` Peter Xu
2020-02-27 21:14 ` Auger Eric
2020-02-27 21:52 ` Peter Xu
2020-02-28 10:34 ` Paolo Bonzini
2020-02-28 10:36 ` Auger Eric
2020-02-28 10:34 ` [PATCH " Paolo Bonzini
2020-02-28 14:58 ` Peter Xu
2020-02-28 15:24 ` Paolo Bonzini [this message]
2020-02-26 22:55 ` [PATCH 5/5] Revert "vfio/pci: Disable INTx fast path if using split irqchip" Peter Xu
2020-02-27 15:32 ` [PATCH 0/5] vfio/pci: Fix up breakage against split irqchip and INTx Auger Eric
2020-02-27 15:51 ` Peter Xu
2020-02-27 17:02 ` Peter Xu
2020-02-28 10:36 ` Paolo Bonzini
2020-02-28 15:25 ` Peter Xu
2020-02-28 15:32 ` Paolo Bonzini
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