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Re: [Xen-devel] [PATCH] Assorted VMX patches
| To: | Kip Macy <kip.macy@xxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] Assorted VMX patches |
| From: | Leendert van Doorn <leendert@xxxxxxxxxxxxxx> |
| Date: | Mon, 25 Apr 2005 12:59:11 -0400 |
| Cc: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Mon, 25 Apr 2005 17:20:44 +0000 |
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| Organization: | IBM T.J. Watson Research Center |
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# Have you tried the modified xc_ptrace on a paravirtualized VM? I don't
# think that the machine address read out of the page tables would index
# correctly into the array of pages which, presumably, are in physical
# order. I think the changes in map_guest_va should probably be
# conditional on the guest being vmx.
You are right, I didn't try the gdbserver patches on a paravirtualized VM,
but I would expect xc_get_pfn_list to return an identity map in that case
so that the dereferences still work.
If it doesn't, then you need to test the flags for ECF_VMX_GUEST and do
the dereferences conditionally.
Leendert
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