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Date: Wed, 4 Dec 2013 11:48:03 -0500 From: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> To: Dmitry Torokhov <dmitry.torokhov@...il.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. > > 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? > > ... > > > +#if defined(CONFIG_XEN_PVHVM) > > +extern bool xen_has_pv_devices(void); > > +#else > > +static inline bool xen_has_pv_devices(void) > > +{ > > +#if defined(CONFIG_XEN) > > + return true; > > +#else > > + return false; > > +#endif > > return IS_ENABLED(CONFIG_XEN); > > ? Oh, awesome! Thanks! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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