diff options
Diffstat (limited to 'target/s390x/cpu_models.c')
| -rw-r--r-- | target/s390x/cpu_models.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c index d91b7b85f6..fa1338fc72 100644 --- a/target/s390x/cpu_models.c +++ b/target/s390x/cpu_models.c @@ -78,6 +78,9 @@ static S390CPUDef s390_cpu_defs[] = { CPUDEF_INIT(0x3906, 14, 1, 47, 0x08000000U, "z14", "IBM z14 GA1"), }; +/* features part of a base model but not relevant for finding a base model */ +S390FeatBitmap ignored_base_feat; + void s390_cpudef_featoff(uint8_t gen, uint8_t ec_ga, S390Feat feat) { const S390CPUDef *def; @@ -237,6 +240,11 @@ const S390CPUDef *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga, if (features) { /* see if the model satisfies the minimum features */ bitmap_andnot(missing, def->base_feat, features, S390_FEAT_MAX); + /* + * Ignore certain features that are in the base model, but not + * relevant for the search (esp. MSA subfunctions). + */ + bitmap_andnot(missing, missing, ignored_base_feat, S390_FEAT_MAX); if (!bitmap_empty(missing, S390_FEAT_MAX)) { break; } @@ -1210,10 +1218,35 @@ static const TypeInfo host_s390_cpu_type_info = { }; #endif +static void init_ignored_base_feat(void) +{ + static const int feats[] = { + /* MSA subfunctions that could not be available on certain machines */ + S390_FEAT_KMAC_DEA, + S390_FEAT_KMAC_TDEA_128, + S390_FEAT_KMAC_TDEA_192, + S390_FEAT_KMC_DEA, + S390_FEAT_KMC_TDEA_128, + S390_FEAT_KMC_TDEA_192, + S390_FEAT_KM_DEA, + S390_FEAT_KM_TDEA_128, + S390_FEAT_KM_TDEA_192, + S390_FEAT_KIMD_SHA_1, + S390_FEAT_KLMD_SHA_1, + }; + int i; + + for (i = 0; i < ARRAY_SIZE(feats); i++) { + set_bit(feats[i], ignored_base_feat); + } +} + static void register_types(void) { int i; + init_ignored_base_feat(); + /* init all bitmaps from gnerated data initially */ for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) { s390_init_feat_bitmap(s390_cpu_defs[i].base_init, |