On Fri, Jun 14, 2024 at 4:09 PM Conor Dooley <conor.dooley@xxxxxxxxxxxxx> wrote: > > On Thu, Jun 13, 2024 at 03:16:10PM -0400, Jesse Taube wrote: > > > Zicclsm Misaligned loads and stores to main memory regions with both > > > the cacheability and coherence PMAs must be supported. > > > Note: > > > This introduces a new extension name for this feature. > > > This requires misaligned support for all regular load and store > > > instructions (including scalar and vector) but not AMOs or other > > > specialized forms of memory access. Even though mandated, misaligned > > > loads and stores might execute extremely slowly. Standard software > > > distributions should assume their existence only for correctness, > > > not for performance. > > > > Detecing zicclsm allows the kernel to report if the > > hardware supports misaligned accesses even if support wasn't probed. > > > > This is useful for usermode to know if vector misaligned accesses are > > supported. > > > > Signed-off-by: Jesse Taube <jesse@xxxxxxxxxxxx> > > Reviewed-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> Reviewed-by: Andy Chiu <andy.chiu@xxxxxxxxxx>
