On 12/10/2010 09:44 AM, Lok Kwong Yan wrote:
Thanks again. I understand that the table can change over time, but it doesn't explain why the top-most table gets zapped and seemingly recreated with a different page frame (and thus the different EPTP values) so frequently. Why isn't the table being updated instead of being destroyed and then recreated? Which piece of the puzzle and I missing?
When the physical memory map changes the EPT tables are zapped. This happens when PCI BARs are remapped, or when VGA remaps the framebuffer windows at 0xa0000-0xc0000. Both of these happen during boot. Do you see zaps happening after boot is complete?
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