From: Eric Auger <eric.auger@linaro.org>
To: Alexander Graf <agraf@suse.de>,
Antonios Motakis <a.motakis@virtualopensystems.com>,
"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
Marc Zyngier <marc.zyngier@arm.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
Christoffer Dall <christoffer.dall@linaro.org>
Subject: Coupling between KVM_IRQFD and KVM_SET_GSI_ROUTING?
Date: Tue, 17 Jun 2014 13:39:55 +0200 [thread overview]
Message-ID: <53A0290B.8040301@linaro.org> (raw)
Hello,
I have a question related to KVM_IRQFD and KVM_SET_GSI_ROUTING ioctl
relationship.
When reading the KVM API documentation I do not understand there is any
dependency between KVM_IRQFD and KVM_SET_GSI_ROUTING. According to the
text it seems only the gsi field is used and interpreted as the irqchip pin.
However irqchip.c kvm_set_irq code relies on an existing and not dummy
routing table.
My question is: does anyone agree on the fact the user-side must set a
consistent routing table using KVM_SET_GSI_ROUTING before using
KVM_IRQFD? The other alternative would have been to build a default
identity GSI routing table in the kernel (gsi = irqchip.pin).
In the positive, shouldn't we clarify the KVM API documentation?
Thank you in advance
Best Regards
Eric
next reply other threads:[~2014-06-17 11:40 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-17 11:39 Eric Auger [this message]
2014-06-19 14:02 ` Coupling between KVM_IRQFD and KVM_SET_GSI_ROUTING? Eric Auger
2014-06-23 16:47 ` Alexander Graf
2014-06-24 9:47 ` Paul Mackerras
2014-06-24 10:40 ` Alexander Graf
2014-06-24 15:05 ` Eric Auger
2014-06-24 15:47 ` Alexander Graf
2014-06-24 16:11 ` Eric Auger
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