linux-kernel - Re: [PATCH] xen/pvhvm: If xen_platform

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Date:	Wed, 4 Dec 2013 09:08:37 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:	stefano.stabellini@...citrix.com, ian.campbell@...rix.com,
	xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
	boris.ostrovsky@...cle.com, david.vrabel@...rix.com,
	leosilva@...ux.vnet.ibm.com, ashley@...leylai.com,
	peterhuewe@....de, mail@...jiv.net, tpmdd@...horst.net,
	tpmdd@...rix.com, bhelgaas@...gle.com, plagnioj@...osoft.com,
	tomi.valkeinen@...com, tpmdd-devel@...ts.sourceforge.net,
	linux-input@...r.kernel.org, netdev@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-fbdev@...r.kernel.org
Subject: Re: [PATCH] xen/pvhvm: If xen_platform_pci=0 is set don't blow up.

On Wed, Dec 04, 2013 at 11:48:03AM -0500, Konrad Rzeszutek Wilk wrote:
> > > which is hardly nice. This patch fixes this by having each
> > > PV driver check for:
> > >  - if running in PV, then it is fine to execute (as that is their
> > >    native environment).
> > >  - if running in HVM, check if user wanted 'xen_emul_unplug=never',
> > >    in which case bail out and don't load PV drivers.
> > >  - if running in HVM, and if PCI device 5853:0001 (xen_platform_pci)
> > >    does not exist, then bail out and not load PV drivers.
> > > 
> > > P.S.
> > > Ian Campbell suggested getting rid of 'xen_platform_pci_unplug'
> > > but unfortunatly the xen-blkfront driver is using it, so we
> > > cannot do it.
> > > 
> > > Reported-by: Sander Eikelenboom <linux@...elenboom.it
> > > Reported-by: Anthony PERARD <anthony.perard@...rix.com>
> > > Reported-by: Fabio Fantoni <fabio.fantoni@....biz>
> > 
> > For input:
> > 
> > Acked-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> 
> Thank you. I need to do some extra changes to the other subsystems but
> for the fb/kbd itshould be still throught the same function as this
> patch has exposed. I will repost it and include your Ack if you are OK
> with that?

Sure.

-- 
Dmitry
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