[Xen-devel] RFC: p2m type change draft

[George Dunlap <George.Dunlap@xxxxxxxxxx>]

Yu Zhang,

As we discussed, attached is the draft of the change to the 
p2m_change_entry_type changes I was working on.

Currently, Xen keeps track of what certain types “should” be, via a list of 
logdirty ranges as well as mmio ranges. 

This patch series attempts to do the opposite: to make “p2m_change_entry_type” 
simply change all entries of type ot to type nt.

It has a couple of issues at the moment.  It’s not yet complete — the actual 
number of entries still to be recalculated isn’t counted.

At the moment both migration and vram logdirty are used by the same type, and 
disambiguated by the “global_logdirty” bit.  To move to the new model, we’d 
have to have two different types.

And some more listed in the patches.

As I said, I’m not sure this is the right way forward or not — but I think it’s 
worth looking at.

Peace,

 -George

Attachment: 0001-xen-ept-Rename-ept_invalidate_emt-to-ept_misconfigur.patch
Description: 0001-xen-ept-Rename-ept_invalidate_emt-to-ept_misconfigur.patch

Attachment: 0002-xen-p2m-Make-p2m_change_entry_type-generic.patch
Description: 0002-xen-p2m-Make-p2m_change_entry_type-generic.patch

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel