[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 1/2] graphics passthrough with VT-d
2009/9/16 Han, Weidong <weidong.han@xxxxxxxxx>: > Stefano Stabellini wrote: >> On Fri, 28 Aug 2009, Jean Guyader wrote: >>> On Fri, Aug 28, 2009 at 03:54:05AM -0400, Han, Weidong wrote: >>>> This patch supports basic gfx passthrough on xen side: >>>> - retrieves VGA bios from host VGA BIOS address (0xC0000), then >>>> load it to guest VGA BIOS address (This is the same with XCI). >>>> - Enlarge guest MMIO range to contain gfx card's large memory >>>> - add a config option 'gfx_passthru' for gfx passthrough >>>> >>>> Signed-off-by: Ben Lin <ben.y.lin@xxxxxxxxx> >>>> Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx> >>> >>> Hi, >>> >>> First thanks for taking the time to upstream those patch that will >>> help a lot. >>> >>> I think the patch will be let intrusive if we could do all >>> that bios mapping + copying inside qemu so we don't need to >>> modify the xc_hvm_build function. >>> >>> Qemu starts before the bios so that should be doable. >> >> The problem with letting qemu do the mapping is that it is not going >> to work with stubdoms, while using a libxc function should work OK as >> long as it is called by xend, as in this case. > > Currently stubdom doesn't support VT-d. So letting qemu do the mapping is > much cleaner. > I remember I tried graphic pass through a while ago with stubdom and it did work. Jean _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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