[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Experimental results for VGA passthrough
Yes, here are the value we need to fake and the raison why: - GMCH, when the vgabios execute at actually check this register in the host bridge (bdf 0:0.0, offset 0x52). On the intel platform this register is there to identify the amount of stolen memory and therefore the supported resolution in legacy mode (VGA/VESA). - VID/DID. Linux check that. If it doesn't match with the graphic card it doesn't reconise the chipset and doesn't create the agpgart. - OpRegion address. Not sure about this one, but when you shutdown/sleep vista if this value is present the driver will try to save some information in a ACPI NVS region. All those register are public you can find some more information about those here: www.intel.com/Assets/PDF/datasheet/319970.pdf Jean 2009/6/8 Beng Heng, Ng <bengheng@xxxxxxxxxxxxxx>: > Also, you mentioned earlier that we need to return some fake values to > the host bridge. Would appreciate if you could explain, or refer me to > some writeups on this. Thanks. > > - Beng Heng > > Beng Heng, Ng wrote: >> Could you elaborate? Thanks. >> >> - Beng Heng >> >> Jean Guyader wrote: >>> 2009/6/8 Beng Heng, Ng <bengheng@xxxxxxxxxxxxxx>: >>>> Uses the driver included in the patch to initialize the graphics card. >>>> This is my own flag. I'm not sure what Jean's plans are. >>> The intel code for qemu you've found is not made for that. >>> >>> Jean >>> >>> _______________________________________________ >>> Xen-devel mailing list >>> Xen-devel@xxxxxxxxxxxxxxxxxxx >>> http://lists.xensource.com/xen-devel >> >> >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@xxxxxxxxxxxxxxxxxxx >> http://lists.xensource.com/xen-devel > > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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