[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] VTD/Intremap: Disable Intremap on Chipset 5500/5520/X58 due to errata
>>> On 16.01.13 at 00:27, Malcolm Crossley <malcolm.crossley@xxxxxxxxxx> wrote: > Unfortunately this chipset is very common and many BIOSes are not > disabling remapping. We can detect this in Xen and prevent turning on > remapping in the first place. However, this will turn VT-d off on many > systems by default. Why would the IOMMU be turned off in that case as a whole? Interrupt remapping is not a prerequisite iirc. > Users who still wish to use VT-d can use iommu=force if they are happy > exposing the associated security risk. "iommu=force" doesn't enable interrupt remapping if it was forcibly turned off. Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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