[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] Re: [PATCH 0/5] Add MSI support to xen environment
xen-devel-bounces@xxxxxxxxxxxxxxxxxxx <> wrote: > On 26/10/07 15:35, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> wrote: > >> For pciback to poke irq configuration, I think for IOAPIC irq is done >> already, we only need add the mapping at that time. For MSI , domain U >> will do that dynamically, so not sure if viable, especially considering >> for MSI-x, only driver knows how many entry will be used. > > dom0 needs to be involved, since we can't let domU map any arbitrary vector > into its pirq space. Since dom0 has to be involved in access control to the > irq vector space, can't it do the mapping? yes, what I mean is, "before starting the domain" works for IOAPIC IRQ, not MSI. MSI will still through communcation between PCI frontend/backend directly. > > -- Keir > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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