Re: [Xen-devel] [PATCH] VT-d: improve RMRR validity checking

[Noboru Iwamatsu <n_iwamatsu@xxxxxxxxxxxxxx>]

Hi Weidong,

I re-send the DRHD-fix patch.

If DRHD does not have existent devices, ignore it.
If DRHD has both existent and non-existent devices, consider it invalid
and not register.

According to this patch and yours, my machine successfully booted
with vt-d enabled.

Signed-off-by: Noboru Iwamatsu <n_iwamatsu@xxxxxxxxxxxxxx>


> Keir Fraser wrote:
> > On 21/01/2010 10:19, "Weidong Han" <weidong.han@xxxxxxxxx> wrote:
> >
> > > > Sorry this is typo.
> > > > I mean:
> > > > So, I think RMRR that has no-existent device is "invalid"
> > > > and whole RMRR should be ignored.
> > > looks reasonable.
> > >
> > > Keir, I Acks Noboru's rmrr patch. Or do you want us to merge them to one
> > > patch?
> > Merge them up, re-send with both sign-off and acked-by all in one email.
> >
> > Thanks,
> > Keir
> Sorry, I disagree with Noboru after thinking it again. If the RMRR has
> both no-existent device and also has existent devices in its scope, we
> should not ignore it because the existent devices under its scope will
> be impacted without the RMRR. so I suggest to print a warning instead of
> ignore it. Attached a patch for it.
>
> Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>

vtd-drhd-fix-v2.patch
Description: Text document

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