>
>What I mean is we pre-load 2 pages where the stack are in, the
>logic may
>be:
>
>If (real mode)
> get 2 pages.
>enter critical path
>....
>VM Resume.
>put these 2 pages.
>handle VM Exit normally.
>
>
With 2nd thinking, We can cache these 2 pages. Something like:
if (real mode)
cache_2_pages (ss:esp)
enter critical path.
In cache_2_pages, old cache can be invalidated (put to user pages), new
pages are loaded (get user page) to avoid SW irq injection page fault.
When switch from real mode to protect mode, invalidate the page cache.
This just needs minimal change :)
Eddie
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