David Miller wrote: > From: Jeff Garzik <[EMAIL PROTECTED]> > Date: Wed, 02 May 2007 03:06:43 -0400 > > > Second, CONFIG_HIGHMEM is a bad test for IOMMU presence. I don't > > think you /can/ test for IOMMU presence. Maybe DaveM knows a way > > that I do not? > > You really can't. > > We have platforms that are both IOMMU and non-IOMMU for the same > configuration, it isn't known until run-time. > > A non-IOMMU system using 64-bit dma_addr_t will always set CONFIG_HIGHMEM, right?
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