| Date | Thu, 13 Dec 2012 15:47:36 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH v6 00/27] x86, boot, 64bit: Add support for loading ramdisk and bzImage above 4G |
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There are obviously good bits to this patchset, but I'm really starting to think the "pseudo-linear mode" via a trap handler -- meaning we can access all of memory without any extra effort -- makes more sense. In fact, that way we could just build the full page tables without worrying about incremental bootstrap, depending on if that is a complexity win or not.
Either way, this is for native only: the Xen domain builder or other similar entry paths should be setting up page tables that cover all of memory; I'm hoping Konrad and Stefano can confirm this.
The only reason to go with another approach I can think of is if it makes 32/64-bit unification cleaner.
-hpa
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