[petsc-users] PETSc GPU matrix creation

[Alberto Cattaneo via petsc-users]

Greetings
I hope this email reaches you all well. I was wondering whether it was possible 
to create PETSc mat objects directly from data that exists on the GPU in AIJ 
format without copying? For example, either via DLPack or just an assurance 
that the pointer provided to a creation method is in the needed AIJ format? 
Ideally, I'd like to be able to build a PETSc AIJCUSPARSE object out of data 
created by another program. I know there are a few builder methods and 
paradigms, but I'm a bit confused as to which would be ideal in this 
circumstance since in some sense the matrix is already created in memory, just 
not as a PETSc object.
Thank you for your assistance, please let me know if I should provide more 
information.
Respectfully:
Alberto Cattaneo