> -----Original Message-----
> From: Muli Ben-Yehuda [mailto:muli@xxxxxxxxxx]
> Sent: Monday, June 04, 2007 9:26 PM
> To: Guy Zana
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] [RFC][PATCH 1/6] HVM PCI Passthrough
> (non-IOMMU)
>
> > +
> > +# PCI pass-through flags
> > +mapping_1to1 ?= y
> > +passthrough ?= y
>
> Does one make sense without the other?
Actually yes, you'll need the 1:1 layout only when using devices that needs DMA.
Just the passthorugh switch could be turned on for other devices...
>
>
> > XEN_COMPILE_ARCH ?= $(shell uname -m | sed -e s/i.86/x86_32/ \
> > -e s/ppc/powerpc/ -e s/i86pc/x86_32/)
> > @@ -9,7 +13,7 @@ XEN_OS ?= $(shell uname -s)
> > XEN_OS ?= $(shell uname -s)
> >
> > ifeq ($(XEN_TARGET_ARCH),x86_32)
> > -XEN_TARGET_X86_PAE ?= y
> > +XEN_TARGET_X86_PAE ?= n
>
> Is there a dependency between 1-1 / passthrough and !PAE, or
> is this just for convenience?
There is a dependency, not that it's that a problem to support PAE, we just
didn't implement it yet.
We decided to support x86_64 and remove the x86_32 / PAE support, as we see it,
there is just no need to support x86_32 / PAE anymore...
>
> > endif
> >
> > CONFIG_$(XEN_OS) := y
> > --- a/tools/Rules.mk Sat May 05 13:48:05 2007 +0100
> > +++ b/tools/Rules.mk Thu May 31 21:04:53 2007 +0300
> > @@ -13,6 +13,14 @@ X11_LDPATH = -L/usr/X11R6/$(LIBDIR)
> X11_LDPATH =
> > -L/usr/X11R6/$(LIBDIR)
> >
> > CFLAGS += -D__XEN_TOOLS__
> > +
> > +ifeq ($(passthrough),y)
> > + CFLAGS += -DCONFIG_NEO
> > +endif
>
> You probably want a better name than CONFIG_NEO, much to the
> disappointment of matrix fans everywhere.
Hehe :)
It'll be removed completely.
The 1:1 enabled layout will be controlled by a boot parameter.
Thanks,
Guy.
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