AIL=2 mode has no known users, so is not well tested or supported. Disallow guests from selecting this mode because it may become deprecated in future versions of the architecture. Signed-off-by: Nicholas Piggin <npiggin@xxxxxxxxx> --- arch/powerpc/kvm/book3s_hv.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 36d16740748a..4295ccdbee26 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -784,6 +784,11 @@ static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags, vcpu->arch.dawr = value1; vcpu->arch.dawrx = value2; return H_SUCCESS; + case H_SET_MODE_RESOURCE_ADDR_TRANS_MODE: + /* KVM does not support mflags=2 (AIL=2) */ + if (mflags != 0 && mflags != 3) + return H_UNSUPPORTED_FLAG_START; + return H_TOO_HARD; default: return H_TOO_HARD; } -- 2.20.1
