[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] Register PV driver product numbers 4 and 5.
> -----Original Message----- > From: Sander Eikelenboom [mailto:linux@xxxxxxxxxxxxxx] > Sent: 09 October 2013 10:10 > To: Ian Campbell > Cc: Paul Durrant; xen-devel@xxxxxxxxxxxxx > Subject: Re: [Xen-devel] [PATCH] Register PV driver product numbers 4 and > 5. > > > Wednesday, October 9, 2013, 10:00:53 AM, you wrote: > > > On Tue, 2013-10-08 at 15:53 +0100, Paul Durrant wrote: > > >> > It's a bit confusing, I agree. Referring back to previous threads though, > all > >> > HVM systems are assumed to have the xen platform PCI device (as > there is > >> > no way to turn it off if youâre using machine type xenfv), thus the fixed > IO > >> > ports that implement the blacklisting protocol are assumed to always be > >> > present. Because the ports are fixed and always present the PV drivers > don't > >> > have to care which device they are binding to - they talk to the same IO > ports > >> > regardless. > > Paul, > > Do you by any chance know the commit that made this unconditional ? > (it used to be possible to switch it off with xen_platform_pci=0, and i'm > trying > to see > if the platform device and the hidden NIC (pci 00:03.0 not visible in guest > lspci > but it's there > (xl dmesg reports it begin generate and there is a gap in the device number > (platform 00:02.0 passthroughed device 00:04.0) has something to do with it. > Sander, It wasn't a commit that did this as such, it's just that no-one added the option to turn it off in upstream QEMU. I believe you can still turn it off if you're using trad QEMU. > The rom bar of my passthroughed device some how gets wired at first to the > vga bios of the cirrus vga or stdvga. > When i disable the emulated vga (-nographic and -vga none) it is suddenly > wired to the ixpe rom (of device 00:03.0). > > So there is something funky going on in either hvmloader, seabios and/or > qemu. Yes, that sounds very funky. Paul > But it would be nice to rule out as much as possible. > > -- > Sander > > > That makes sense I suppose. > > > Can we add some words about this relationship to the docs then? > > >> Ping? Do I need to add any further clarification? > > > I thought I'd already replied but I don't see it anywhere on the list or > > in my sent box, sorry. > > > Ian/ > > > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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