[v1,0/2] KVM: s390: fix diag258 virtual-physical confusion

Message

Nico Boehr Sept. 17, 2024, 3:18 p.m. UTC

The parameters for the diag 0x258 are real addresses, not virtual, but
KVM was using them as virtual addresses. This only happened to work, since
the Linux kernel as a guest used to have a 1:1 mapping for physical vs
virtual addresses.

In addition, add handling for guest addresses outside memslots in
access_guest_page() for architectural compliance and testability.

Michael Mueller (1):
  KVM: s390: Change virtual to physical address access in diag 0x258
    handler

Nico Boehr (1):
  KVM: s390: gaccess: check if guest address is in memslot

 arch/s390/kvm/diag.c    |  2 +-
 arch/s390/kvm/gaccess.c |  7 +++++++
 arch/s390/kvm/gaccess.h | 14 ++++++++------
 3 files changed, 16 insertions(+), 7 deletions(-)