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Re: [Xen-devel] [PATCH 09/17] x86/amd: put setting pv_post_outb_hook under CONFIG_PV

On Thu, Oct 25, 2018 at 03:22:17AM -0600, Jan Beulich wrote:
> >>> On 15.10.18 at 13:19, <roger.pau@xxxxxxxxxx> wrote:
> > On Fri, Oct 12, 2018 at 08:14:36AM -0600, Jan Beulich wrote:
> >> >>> On 04.10.18 at 17:43, <wei.liu2@xxxxxxxxxx> wrote:
> >> > It is used by PV code only.
> >> 
> >> And wrongly so - the same is needed for a PVH Dom0 afaict.
> > 
> > Yes, looking at the models affected by this issue according to
> > init_amd it seems to cover the full AMD line (from family 0xf to
> > 0x17). I don't seem to find a reference in the code to the Errata, do
> > you know if there's some formal description of it?
> I don't recall this having been considered an erratum.
> Checking just the Fam10 and Fam15 BKDGs, I'm getting the
> impression that Fam15 does not have the issue worked around
> here. It might further be that not even all Fam10 steppings are
> affected. Brian - any chance you could clarify this for us?
> Independent of the range of systems affected I still think that
> PVH Dom0 behavior here ought to be the same as PV Dom0's.
> Jan

Just an FYI, I'm looking into it.  I might require to an email to an
engineer who's always extremely busy, so it might take a little while.

Brian Woods

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