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Re: [Xen-devel] Re: [PATCH 0/5] Add MSI support to xen environment
| To: | "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Re: [PATCH 0/5] Add MSI support to xen environment |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Fri, 26 Oct 2007 16:04:38 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Fri, 26 Oct 2007 08:05:34 -0700 |
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| Thread-topic: | [Xen-devel] Re: [PATCH 0/5] Add MSI support to xen environment |
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On 26/10/07 16:02, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> wrote: >> 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. Oh, I see. Then it probably has to be a phydevop and let dom0 kernel do it. But there should be no reason to let domU use the map_irq physdev_op at all. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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