Re: [Xen-devel] [PATCH] x86: detect CMOS aliasing on ports other then 0x70/0x71

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 25.09.15 at 11:55, <andrew.cooper3@xxxxxxxxxx> wrote:
> It is safe for the SMM handler to use CMOS if it returns the index 
> register back to how it found it.  Furthermore, I am willing to bet that 
> there real SMM handlers out there which do do this.

So what options do you see then here? Don't do anything (drop the
patch) seems the only one I can see not getting in conflict with SMI.
Yet using the patch as is would not make anything less safe, it would
just have the potential of not always making things as safe as they
could be.

Jan


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