Re: [Xen-devel] [PATCH RFC 3/3] xtf: add minimal HPET functionality test

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 01.03.18 at 11:14, <roger.pau@xxxxxxxxxx> wrote:
> Hm, nice. Then I basically need to issue both a LFENCE and MFENCE
> because I don't plan to introduce an alternatives framework to XTF
> ATM.

Or you could skip the test if you find LFENCE isn't serializing on
AMD. After all the hypervisor now makes it serializing wherever
it can, and it is serializing on the two families where the respective
MSR doesn't exist. Of course the question is whether seeing the
raw (host) value of that MSR is actually something such a test
should be permitted to rely upon; Andrew may have very specific
thoughts on this.

Jan


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