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Re: [PATCH] fix ia64 breakage with PHYSDEVOP_pirq_eoi_mfn (was Re: [Xen-
| To: | Isaku Yamahata <yamahata@xxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [PATCH] fix ia64 breakage with PHYSDEVOP_pirq_eoi_mfn (was Re: [Xen-devel] [PATCH 2/2] linux/x86: use shared page indicating the need for an EOI notification) |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Wed, 03 Dec 2008 10:08:50 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Wed, 03 Dec 2008 02:09:14 -0800 |
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| Thread-topic: | [PATCH] fix ia64 breakage with PHYSDEVOP_pirq_eoi_mfn (was Re: [Xen-devel] [PATCH 2/2] linux/x86: use shared page indicating the need for an EOI notification) |
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On 03/12/2008 09:59, "Isaku Yamahata" <yamahata@xxxxxxxxxxxxx> wrote: > On the other hand on ia64 MMU is fully virtualized (i.e. auto translated > phsymap mode enabled) and DMA is paravirtualized. > So addresses for MMU and DMA have to be distinguished. > xxx_to_machine() is used for MMU and xxx_to_bus() is used for DMA. If you are fully virtualised then gmfn should mean gpfn, and arbitrary_virt_to_machine() is correct, isn't it? I can't see a situation where arbitrary_virt_to_machine() wouldn't correctly give you a gmfn (after all, it gets you a machine address in guest context, as its name describes :-). -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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