Linked by Thom Holwerda on Sun 22nd Jul 2007 00:33 UTC, submitted by liquidat
Linux Linus Torvalds included patches into the mainline tree which implement a stable userspace driver API into the Linux kernel. The stable driver API was already announced a year ago by Greg Kroah-Hartman. Now the last patches were uploaded and the API was included in Linus' tree. The idea of the API is to make life easier for driver developers: "This interface allows the ability to write the majority of a driver in userspace with only a very small shell of a driver in the kernel itself. It uses a char device and sysfs to interact with a userspace process to process interrupts and control memory accesses."
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RE: Useful API? Useless API !
by draethus on Mon 23rd Jul 2007 14:26 UTC in reply to "Useful API? Useless API !"
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One incredibly useful thing with this API that everybody seems to be missing, is that guest operating systems running in virtual machines are now able to access host PCI hardware. There was a few times people already did this: the bochs x86 emulator apparently has/had a pcidev kernel module, and the Gelato guys also did some work in this direction, but this is officially in the kernel so it will work without having to build any out-of-tree modules.

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