Messages in this thread | | | From | Jesse Barnes <> | Subject | Re: multi-domain PCI and sysfs | Date | Tue, 7 Sep 2004 21:15:09 -0700 |
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On Tuesday, September 7, 2004 4:11 pm, David S. Miller wrote: > This is a real touchy area btw, because if there is no > VGA card, such I/O port accesses are going to trap and > we need to have a common way to handle that somehow.
So I take it your platform won't soft fail the accesses and return all 1s? On ia64, I've got a patch to add some machine check code to deal with it, but it requires pre-registration of the regions that are to be used for legacy I/O (i.e. I have to record the memory range and pid at /proc/bus/pci mmap time so that the machine check handler can send a SIGBUS). A potentially cleaner option which Ben and I would prefer is to use the vga device Jon is creating to do legacy I/O with explicit read/write or ioctl calls.
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