From: Matthew Wilcox <willy@debian.org>
Date: Mon, 12 May 2003 17:53:31 +0100
On Mon, May 12, 2003 at 12:32:49PM -0400, Jeff Garzik wrote:
> Has anybody done any work, or put any thought, into MSI support?
Work -- no. Thought? A little. Seems to me that MSIs need to be
treated as a third form of interrupts (level/edge/message).
The fact that Alpha already supports them pretty much transparently
suggests that the thing to do might very well be "nothing" :-)
To be honest, MSIs are very similar to how interrupts work on sparc64,
in that each device generates a unique interrupt cookie. The only
different is the size of this cookie, MSIs are larger than sparc64's.
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