On Wed, Nov 29, 2017 at 03:13:57PM -0800, Christoph Hellwig wrote: > On Tue, Nov 28, 2017 at 11:57:53PM +0200, Jarkko Sakkinen wrote: > > > Yes. You still shall not play nasty games with file descriptors. > > > > I need to put something to file descriptors in order to have a IO > > channels for the launch enclave hosting process. > > Just do it like any other program - open it from your userspace > program using open() and related syscalls. In this case it would not work as the launch enclave is still part of the kernel and it would create a dependency how the user space defines paths. If using pipe specifically is an issue, I could easily use shmem file as a mean for communiation. The way I implemented is much like how I did arch/x86/realmode with HPA and it has kind of comparable requirements, part of the kernel but not exactly code living in the kernel namespace. /Jarkko
