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[Bug 228344] Acer Ferrari 1000 resets on resume with CONFIG_MTRR
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Mon, 19 Feb 2007 11:10:15 -0700 (MST)
  • Message-id: <20070219181015.E67D9FCD@xxxxxxxxxxxxxxxxxxxxxx>

------- Comment #30 from bk@xxxxxxxxxx 2007-02-19 11:10 MST -------
Yes, looks good.

A quick proof-of-concept, tailored to the dual-core Ferrari 1000 works on it.

Just for additional information, but not of importance, do you have (or has
anybody here) a pointer to the recommendations for MTRR save/restore?

In the first step which I described in comment #28, I initialized the MTRRs of
the AP with the values which I got from the BP in disable_nonboot_cpus()
(because I saw that it runs during suspend) - That was an easy quick test.

Because that caused exceptions on the second core of this Ferrari 1000
(as described), I used a separate MTRR backup for the AP (the AP does not
accept the same MTRR setup on this machine) - and that works fine and
really restores what was there before suspend (which should be safe).

I'll extract the changes and post them for review here.

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