From: "Michael S. Tsirkin" <mst@redhat.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Sheng Yang <sheng@linux.intel.com>, Avi Kivity <avi@redhat.com>,
Matthew Wilcox <willy@linux.intel.com>,
kvm@vger.kernel.org
Subject: Re: KVM_ASSIGN_SET_MSIX_NR and KVM_ASSIGN_SET_MSIX_ENTRY should support MSI?
Date: Tue, 5 May 2009 14:08:15 +0300 [thread overview]
Message-ID: <20090505110815.GC15418@redhat.com> (raw)
In-Reply-To: <20090505110415.GA4114@amt.cnet>
On Tue, May 05, 2009 at 08:04:15AM -0300, Marcelo Tosatti wrote:
> On Tue, May 05, 2009 at 01:30:28PM +0300, Michael S. Tsirkin wrote:
> > The new KVM_ASSIGN_SET_MSIX_NR and KVM_ASSIGN_SET_MSIX_ENTRY ioctls have
> > been merged for 2.6.30. However, I note that PCI spec allows devices to
> > support multiple vectors with MSI as well (support will be in linux
> > 2.6.30).
> >
> > Even though qemu for now only uses a single vector with MSI, it would
> > seem that it's better to make the kernel/user interface generic straight
> > away rather than add more ioctls later. What do you think? It might not
> > be too late to fix this for 2.6.30.
>
> Can't you use more than one KVM_ASSIGN_SET_MSIX_ENTRY call per assigned
> device?
Sure, but only one KVM_ASSIGN_SET_MSIX_NR.
> If you can't, it would be better to change the ioctls before 2.6.30 is
> release IMO.
>
--
MST
next prev parent reply other threads:[~2009-05-05 11:09 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-05 10:30 KVM_ASSIGN_SET_MSIX_NR and KVM_ASSIGN_SET_MSIX_ENTRY should support MSI? Michael S. Tsirkin
2009-05-05 11:04 ` Marcelo Tosatti
2009-05-05 11:08 ` Michael S. Tsirkin [this message]
2009-05-05 11:57 ` Avi Kivity
2009-05-05 12:01 ` Michael S. Tsirkin
2009-05-05 12:08 ` Avi Kivity
2009-05-05 12:39 ` Michael S. Tsirkin
2009-05-05 12:57 ` Michael S. Tsirkin
2009-05-05 13:30 ` Avi Kivity
2009-05-06 3:11 ` Sheng Yang
2009-05-05 11:29 ` Gregory Haskins
2009-05-20 8:48 ` Sheng Yang
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