On Mon, Feb 07, 2022 at 05:59:20PM +0100, Janis Schoetterl-Glausch wrote: > Add copy_from/to_user_key functions, which perform storage key checking. > These functions can be used by KVM for emulating instructions that need > to be key checked. > These functions differ from their non _key counterparts in > include/linux/uaccess.h only in the additional key argument and must be > kept in sync with those. > > Since the existing uaccess implementation on s390 makes use of move > instructions that support having an additional access key supplied, > we can implement raw_copy_from/to_user_key by enhancing the > existing implementation. > > Signed-off-by: Janis Schoetterl-Glausch <scgl@xxxxxxxxxxxxx> > --- > arch/s390/include/asm/uaccess.h | 22 +++++++++ > arch/s390/lib/uaccess.c | 81 +++++++++++++++++++++++++-------- > 2 files changed, 85 insertions(+), 18 deletions(-) Acked-by: Heiko Carstens <hca@xxxxxxxxxxxxx> Christian, Janosch, I think this can go via the kvm tree.
