Zachary Amsden <zach at vmware.com> writes: > > Yes, so we prefix all of this code with a third check - by probing for the VMI > ROM. A compatible PCI option ROM is only going to be detected on > paravirtualized systems, and we do have a PCI vendor ID. So we really need a > probe type interface that happens after the head.S entry point (while it could > be in head.S, the code is simpler to understand when written in C). Yes. Having a magic VMWare pci device at a fixed location on bus 0. Sounds like an easy thing to test for. It is a weird special case in the code flow but it doesn't sound to bad. And it is using a mechanism that won't have architectural conflicts in the future. I was half wondering if there was a BIOS call we might make in setup.S to see if we were running under vmware. Certainly there are some rough edges to work out here. Eric
