Messages in this thread | | | Date | Fri, 11 Nov 2011 16:47:36 -0800 | From | Chris Wright <> | Subject | Re: [PATCH] intel-iommu: Default to non-coherent for domains unattached to iommus |
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* Chris Wright (chrisw@sous-sol.org) wrote: > * David Woodhouse (dwmw2@infradead.org) wrote: > > So if you were to ditch the whole idea of a per-domain runtime update, > > and instead calculate a global value for 'iommu_coherency' at boot time, > > by iterating over for_each_active_iommu()¹, I think that would be a > > better way to deal with the issue. And you *could* really call that a > > 'fix'. > > > > Make sense? > > Ideally, yes. Not sure we can practically do it though. Would have to > be sure we force incoherent access mode for the busted hw.
Forgot to mention, the simple patch may be the better choice for -stable (assuming the page table mapping issue...isn't). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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