On Tue, 27 Feb 2018 09:28:01 -0500 Tony Krowiak <akrowiak@xxxxxxxxxxxxxxxxxx> wrote: > If the AP instructions are not available on the linux host, then > AP devices can not be interpreted by the SIE. The AP bus has a > function it uses to determine if the AP instructions are > available. This patch provides a new function that wraps the > AP bus's function to externalize it for use by KVM. > > Signed-off-by: Tony Krowiak <akrowiak@xxxxxxxxxxxxxxxxxx> > Reviewed-by: Pierre Morel <pmorel@xxxxxxxxxxxxxxxxxx> > --- > arch/s390/include/asm/ap.h | 7 +++++++ > drivers/s390/crypto/ap_bus.c | 6 ++++++ > 2 files changed, 13 insertions(+), 0 deletions(-) While I don't see anything wrong with this patch as it stands, you need to be careful to call this only from vfio-ap code (which depends on CONFIG_ZCRYPT). Speaking of which: the ap_bus part cannot be a module, but only built-in, right? So we don't get additional module complications?
