[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] ioperm problem
On 11/17/2011 09:30 AM, Konrad Rzeszutek Wilk wrote: > On Thu, Nov 17, 2011 at 08:56:34AM -0500, Ben Guthro wrote: >> Attached is our patch to work around issues with the ioports with >> some older nVidia cards. >> >> This, admittedly is a bit of a hack, and not exactly something that >> I would see upstream wanting to carry, for a variety of reasons. It >> really should all be predicated on whether the kernel is the initial >> domain, etc. >> >> This opens up the legacy VGA ports in the VGA arbiter code. > Was there a userspace program that did this? As in it would > call ioperm? > >> Konrad - I think that you had suggested an alternate way of doing >> this, IIRC, but I can't seem to find it in my inbox. Due to >> competing demands, and my nVidia hardware disappearing, I never went >> back to rework this code. > Ah, I might have some code that I just uncovered from Jeremy's old > git tree. > > I've put it up on devel/ioperm - it nicely wraps the ioperm > call to go the native or paravirt. Yeah, I'd sort of let that sit, since there's nothing in a "modern" system which should require it. Allowing usermode to poke at ioports from within a domain is inherently suspect, after all. J _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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