Messages in this thread | | | Date | Wed, 6 Jun 2012 10:29:00 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 2/2] iommu: dmar -- reserve mmio space used by IOMMU |
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* David Woodhouse <dwmw2@infradead.org> wrote:
> On Wed, 2012-06-06 at 10:16 +0200, Ingo Molnar wrote: > > > So basically the patch-set is fine as-is, we just want a > > sufficiently nasty sounding warning message about the BIOS > > bug, > > No. The other change that's required is that the warning and > the workaround need to trigger even when IOMMU support isn't > built into the kernel. This BIOS bug can bite you even when > you aren't *using* the IOMMU.
Right, but that's the status quo and most of the time (distro kernels) the driver is available, right?
So for all practical purposes we get 99% of the warning power without going into chicken-and-egg problems like how do we determine that there's an IOMMU area there if there's no IOMMU aware code in the kernel, right?
Thanks,
Ingo
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