The first patch in this series fixes a KVM PR host crash due to a guest executing the scv instruction or with a pseries SMP host, the host CPUs executing the scv instruction while a PR guest is running.
The second patch fixes unimplemented H_SET_MODE AIL modes by returning failure from the hcall rather than succeeding but not implementing the required behaviour. This works around missing host scv support for scv-capable Linux guests by causing them to disable the facility. Still looking at doing a proper capability for QEMU/KVM so we can get consistency between HV, PR, and TCG. That shouldn't change these patches though. Thanks, Nick Nicholas Piggin (2): KVM: PPC: Book3S PR: Disable SCV when AIL could be disabled KVM: PPC: Book3S PR: Disallow AIL != 0 arch/powerpc/kernel/exceptions-64s.S | 4 ++++ arch/powerpc/kernel/setup_64.c | 28 ++++++++++++++++++++++++++++ arch/powerpc/kvm/Kconfig | 9 +++++++++ arch/powerpc/kvm/book3s_pr.c | 20 ++++++++++++++------ arch/powerpc/kvm/book3s_pr_papr.c | 20 ++++++++++++++++++++ 5 files changed, 75 insertions(+), 6 deletions(-) -- 2.23.0
