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

Nico Boehr
2024-09-17T15:19:44Z

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(-)

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2.46.0