From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Alexander Graf <agraf@suse.de>
Cc: Anthony Liguori <aliguori@us.ibm.com>,
Alexey Kardashevskiy <aik@ozlabs.ru>,
qemu-devel@nongnu.org,
Alex Williamson <alex.williamson@redhat.com>,
qemu-ppc@nongnu.org, David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [Qemu-devel] [PATCH 2/3] KVM: add kvm_arch_irqchip_add_msi_route
Date: Sat, 22 Jun 2013 07:54:47 +1000 [thread overview]
Message-ID: <1371851687.3944.69.camel@pasglop> (raw)
In-Reply-To: <0E9E14EB-DD5F-4B7A-ACE5-6C9F0103324C@suse.de>
On Fri, 2013-06-21 at 15:46 +0200, Alexander Graf wrote:
> Not sure. We could just declare a "direct virq==irq" mode in which
> msi.data == virq == irq. No need for any translation then.
Maybe. Beware that MSI data is only 16-bit on the wire but we may not
care here.
One thing I'm not 100% certain of is how Alexey makes all that work with
VFIO since the MSI address/data in the device shall not be the qemu
"cooked up" ones, but the real HW ones (corresponding to a different
host interrupt).
How do that work ?
Cheers,
Ben.
next prev parent reply other threads:[~2013-06-21 21:55 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-21 9:22 [Qemu-devel] [PATCH 0/3] RFCv2 kvm irqfd: add directly mapped MSI IRQ support Alexey Kardashevskiy
2013-06-21 9:22 ` [Qemu-devel] [PATCH 1/3] spapr pci msi: rework Alexey Kardashevskiy
2013-06-21 10:31 ` Alexander Graf
2013-06-21 10:52 ` Alexey Kardashevskiy
2013-06-21 11:58 ` Anthony Liguori
2013-06-21 11:59 ` Alexander Graf
2013-06-21 12:09 ` Benjamin Herrenschmidt
2013-06-21 12:02 ` Benjamin Herrenschmidt
2013-06-21 9:22 ` [Qemu-devel] [PATCH 2/3] KVM: add kvm_arch_irqchip_add_msi_route Alexey Kardashevskiy
2013-06-21 10:33 ` Alexander Graf
2013-06-21 12:03 ` Benjamin Herrenschmidt
2013-06-21 12:05 ` Alexander Graf
2013-06-21 12:10 ` Benjamin Herrenschmidt
2013-06-21 13:46 ` Alexander Graf
2013-06-21 21:54 ` Benjamin Herrenschmidt [this message]
2013-06-21 22:12 ` Alexander Graf
2013-06-21 22:21 ` Benjamin Herrenschmidt
2013-06-21 23:10 ` Alex Williamson
2013-06-21 23:19 ` Benjamin Herrenschmidt
2013-06-21 9:22 ` [Qemu-devel] [PATCH 3/3] KVM: PPC: enable irqfd Alexey Kardashevskiy
2013-06-21 17:52 ` Scott Wood
2013-06-22 1:12 ` Alexey Kardashevskiy
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