[PATCH 0/2] Dirtying, failing memop: don't indicate suppression

From: Janis Schoetterl-Glausch
Date: Fri Apr 01 2022 - 13:03:04 EST

If a memop fails due to key checked protection, after already having
written to the guest, don't indicate suppression to the guest, as that
would imply that memory wasn't modified.

This could be considered a fix to the code introducing storage key
support, however this is a bug in KVM only if we emulate an
instructions writing to an operand spanning multiple pages, which I
don't believe we do.

Janis Schoetterl-Glausch (2):
KVM: s390: Don't indicate suppression on dirtying, failing memop
KVM: s390: selftest: Test suppression indication on key prot exception

arch/s390/kvm/gaccess.c | 47 ++++++++++++++---------
tools/testing/selftests/kvm/s390x/memop.c | 43 ++++++++++++++++++++-
2 files changed, 70 insertions(+), 20 deletions(-)

base-commit: 1ebdbeb03efe89f01f15df038a589077df3d21f5