Re: [Xen-devel] [PATCH] xen: arm: Do not expose PMU to domain 0

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Fri, 2015-06-05 at 11:17 +0100, Julien Grall wrote:
> Hi Ian,
> 
> On 04/06/2015 17:49, Ian Campbell wrote:
> > It uses a PPI which we cannot route to a guest, and will surely need
> > more support than just that anyway.
> >
> > I noticed this on Mustang with UEFI where the built in DTB contains a
> > node of this type.
> >
> > Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> > ---
> >   xen/arch/arm/domain_build.c |    1 +
> >   1 file changed, 1 insertion(+)
> >
> > diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
> > index 1e545fe..8e87315 100644
> > --- a/xen/arch/arm/domain_build.c
> > +++ b/xen/arch/arm/domain_build.c
> > @@ -1105,6 +1105,7 @@ static int handle_node(struct domain *d, struct 
> > kernel_info *kinfo,
> >           DT_MATCH_COMPATIBLE("multiboot,module"),
> >           DT_MATCH_COMPATIBLE("arm,psci"),
> >           DT_MATCH_COMPATIBLE("arm,psci-0.2"),
> > +        DT_MATCH_COMPATIBLE("arm,armv8-pmuv3"),
> 
> Will you are here, can you blacklist at list "arm,cortex-a15-pmu" and 
> "arm,cortex-a7-pmu"?
> 
> I suspect we would have the same problem with them.

Suspect, or know?

Ian.


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