s390x/cpumodel: provide compat handling for new cpu features
Provide a mechanism to disable features in compatibility machines.
Signed-off-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c
index 7cb55dc..fd3f459 100644
--- a/target/s390x/cpu_models.c
+++ b/target/s390x/cpu_models.c
@@ -77,6 +77,32 @@
CPUDEF_INIT(0x2965, 13, 2, 47, 0x08000000U, "z13s", "IBM z13s GA1"),
};
+void s390_cpudef_featoff(uint8_t gen, uint8_t ec_ga, S390Feat feat)
+{
+ const S390CPUDef *def;
+
+ def = s390_find_cpu_def(0, gen, ec_ga, NULL);
+ clear_bit(feat, (unsigned long *)&def->default_feat);
+}
+
+void s390_cpudef_featoff_greater(uint8_t gen, uint8_t ec_ga, S390Feat feat)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
+ const S390CPUDef *def = &s390_cpu_defs[i];
+
+ if (def->gen < gen) {
+ continue;
+ }
+ if (def->gen == gen && def->ec_ga < ec_ga) {
+ continue;
+ }
+
+ clear_bit(feat, (unsigned long *)&def->default_feat);
+ }
+}
+
uint32_t s390_get_hmfai(void)
{
static S390CPU *cpu;
