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> for example, many existing video applications use mmap() to map the
> device memory to userspace memory. Adding support for mmap() to CUSE
> would allow these apps to work without any modifications with CUSE-based
> device drivers other than kernel drivers.
So you want to access device memory via CUSE?
We have plenty of mechanisms in Linux to allow userspace accessing device memory.
E.g. /dev/mem, UIO, VFIO.
A simple (but ugly!) approach would be redirecting mmap() requests on CUSE devices to /dev/mem.
hmm?
Thanks,
//richard
> A simple (but ugly!) approach would be redirecting mmap() requests on CUSE devices to /dev/mem.
> hmm?
what requests are you talking about given that at the moment the CUSE
client interface (cuse_lowlevel_ops) does not expose mmap?