On 02/28/2018 06:41 PM, Cornelia Huck wrote: > 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? Right, the AP bus is not available as a module but statically build. > -- > To unsubscribe from this list: send the line "unsubscribe linux-s390" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
