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-rw-r--r--target-ppc/kvm.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index a090d79..f3d0861 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -912,9 +912,15 @@ const ppc_def_t *kvmppc_host_cpu_def(void)
/* Now fix up the spec with information we can query from the host */
- alter_insns(&spec->insns_flags, PPC_ALTIVEC, vmx > 0);
- alter_insns(&spec->insns_flags2, PPC2_VSX, vmx > 1);
- alter_insns(&spec->insns_flags2, PPC2_DFP, dfp);
+ if (vmx != -1) {
+ /* Only override when we know what the host supports */
+ alter_insns(&spec->insns_flags, PPC_ALTIVEC, vmx > 0);
+ alter_insns(&spec->insns_flags2, PPC2_VSX, vmx > 1);
+ }
+ if (dfp != -1) {
+ /* Only override when we know what the host supports */
+ alter_insns(&spec->insns_flags2, PPC2_DFP, dfp);
+ }
return spec;
}
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