[PATCH 3/3] drivers:hv: Define the channel type for Hyper-V PCI Express pass-through

KY Srinivasan kys at microsoft.com
Mon Sep 21 16:27:28 UTC 2015



> -----Original Message-----
> From: Greg KH [mailto:gregkh at linuxfoundation.org]
> Sent: Sunday, September 20, 2015 10:29 PM
> To: KY Srinivasan <kys at microsoft.com>
> Cc: linux-kernel at vger.kernel.org; devel at linuxdriverproject.org;
> olaf at aepfle.de; apw at canonical.com; vkuznets at redhat.com;
> jasowang at redhat.com; Jake Oshins <jakeo at microsoft.com>
> Subject: Re: [PATCH 3/3] drivers:hv: Define the channel type for Hyper-V PCI
> Express pass-through
> 
> On Tue, Sep 15, 2015 at 06:26:49PM -0700, K. Y. Srinivasan wrote:
> > From: Jake Oshins <jakeo at microsoft.com>
> >
> > This defines the channel type for PCI front-ends in Hyper-V VMs.
> >
> > Signed-off-by: Jake Oshins <jakeo at microsoft.com>
> > Signed-off-by: K. Y. Srinivasan <kys at microsoft.com>
> > ---
> >  include/linux/hyperv.h |   11 +++++++++++
> >  1 files changed, 11 insertions(+), 0 deletions(-)
> >
> > diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
> > index ea0a0e3..5587899 100644
> > --- a/include/linux/hyperv.h
> > +++ b/include/linux/hyperv.h
> > @@ -1140,6 +1140,17 @@ u64 hv_do_hypercall(u64 control, void *input,
> void *output);
> >  		}
> >
> >  /*
> > + * PCI Express Pass Through
> > + * {44C4F61D-4444-4400-9D52-802E27EDE19F}
> > + */
> > +
> > +#define HV_PCIE_GUID \
> > +	.guid = { \
> > +			0x1D, 0xF6, 0xC4, 0x44, 0x44, 0x44, 0x00, 0x44, \
> > +			0x9D, 0x52, 0x80, 0x2E, 0x27, 0xED, 0xE1, 0x9F \
> > +		}
> > +
> > +/*
> >   * Common header for Hyper-V ICs
> >   */
> 
> Yet you do nothing with this, so why add it to the code at this point in
> time?  I can't take pointless things like this...

Greg,

This is a valid GUID that the host can offer us today. The driver to handle this is currently under review (Jake has
posted the code). Traditionally, we have kept our header files in synch with the host functionality.

Regards,

K. Y


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