On Tue, 2014-03-18 at 14:59 +0200, Jani Nikula wrote: > From: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > > We have reports of heavy screen corruption if we try to use the stolen > memory reserved by the BIOS whilst the DMA-Remapper is active. This > quirk may be only specific to a few machines or BIOSes, but first lets > apply the big hammer and always disable use of stolen memory when DMAR > is active. > > v2 by Jani: Rebase on -fixes, only look at intel_iommu_gfx_mapped. Perhaps this (and all similar workarounds) should be predicated on i915_preliminary_hw_support? When people are using the Linux kernel for chipset validation, we sure as hell don't want to silently disable this stuff and let them think it's working when it's not. -- dwmw2
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