If I recall correctly, enabling IOMMU in the BIOS just makes the kernel's job easier in finding a hunk of MMIO space to place the Aperture. Providing you didn't disable IOMMU on the grub line, I believe Andi's code will still attempt to setup the Aperture and use it for IOMMU even if it is not getting hints from the BIOS. -Rich Brunner, AMD
-----Original Message----- From: John Craig [mailto:johncraig01@netscape.net] Sent: Friday, June 18, 2004 9:11 AM To: suse-amd64@suse.com Subject: [suse-amd64] IOMMU
This may seem like a dumb question, but should I enable IOMMU in the bios? This is a dual Opteron file server with a MSI K8D Master Mobo. I just noticed that it was disabled by default, and that it is used by Linux to translate 32-bit addresses to 64-bit addresses.
Thanks, John Craig
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