On Thu, Jun 20 2024 at 02:53, Jason A. Donenfeld wrote: > Hook up the generic vDSO implementation to the x86 vDSO data page. Since > the existing vDSO infrastructure is heavily based on the timekeeping > functionality, which works over arrays of bases, a new macro is > introduced for vvars that are not arrays. > > The vDSO function requires a ChaCha20 implementation that does not write > to the stack, yet can still do an entire ChaCha20 permutation, so > provide this using SSE2, since this is userland code that must work on > all x86-64 processors. There's a simple test for this code as well. > > Reviewed-by: Samuel Neves <sneves@xxxxxxxxx> # for vgetrandom-chacha.S > Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx> Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
