Michal Suchánek <msucha...@suse.de> writes: > Hello, > > On Tue, 24 Apr 2018 14:15:57 +1000 > Michael Ellerman <m...@ellerman.id.au> wrote: > >> From: Michal Suchanek <msucha...@suse.de> >> >> Check what firmware told us and enable/disable the barrier_nospec as >> appropriate. >> >> We err on the side of enabling the barrier, as it's no-op on older >> systems, see the comment for more detail. >> >> Signed-off-by: Michael Ellerman <m...@ellerman.id.au> ... > > I am missing the option for the barrier to be disabled by a kernel > commandline argument here. > > It does make sense to add a kernel parameter that is checked on boot to > be compatible with other platforms that implement one.
No other platforms have an option to disable variant 1 mitigations, so there isn't an existing parameter we can use. Which is not to say we can't add one, but I wasn't sure if it was really worth it. But I guess we should add one, I might do it as a follow-up patch. cheers
