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Re: [Xen-devel] how to tell if a DomU (HVM) touches a specific address
| To: | James Harper <james.harper@xxxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] how to tell if a DomU (HVM) touches a specific address |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Sun, 21 Jun 2009 12:19:01 +0100 |
| Cc: | |
| Delivery-date: | Sun, 21 Jun 2009 04:19:33 -0700 |
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| Thread-topic: | [Xen-devel] how to tell if a DomU (HVM) touches a specific address |
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On 21/06/2009 10:49, "James Harper" <james.harper@xxxxxxxxxxxxxxxx> wrote: >> Is the physical address RAM? If there is no physical page at that > address >> then accesses in that range will trap to qemu and you could pick them > up >> there. >> > > What's the best place to do that? I've had a little look and can't find > where the trap would 'come in'. cpu_physical_memory_rw() is qemu's main interface to readign and writing physical memory regions. Everything (RAM accesses, MMIO accesses, and also accesses which go to nowhere) go through that, so hooking there would be sensible. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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