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Re: [Xen-devel] Getting a bus address for granted page in dom0
| To: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Getting a bus address for granted page in dom0 |
| From: | Kieran Mansley <kmansley@xxxxxxxxxxxxxx> |
| Date: | Tue, 07 Nov 2006 15:34:56 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Tue, 07 Nov 2006 07:35:22 -0800 |
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| In-reply-to: | <C1761DE8.4168%Keir.Fraser@xxxxxxxxxxxx> |
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| References: | <C1761DE8.4168%Keir.Fraser@xxxxxxxxxxxx> |
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On Tue, 2006-11-07 at 11:26 +0000, Keir Fraser wrote: > Do you need to map the rings into dom0 addr space at all? If not just do a > GNTMAP_device_map yourself, and this will return a dev_bus_addr that you can > poke into hardware. If you go this route you avoid using the Linux DMA > interfaces altogether. Thanks Keir, that was exactly what I was looking for. I've implemented this as an extra little helper function in xenbus_backend_client.c as an alternative to xenbus_map_ring() and xenbus_map_ring_valloc(). Is this something of wider use/interest? I'd be happy to submit a patch if so. Kieran _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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