/* * CPU features/facilities for s390x * * Copyright IBM Corp. 2016, 2018 * Copyright Red Hat, Inc. 2019 * * Author(s): David Hildenbrand * * This work is licensed under the terms of the GNU GPL, version 2 or (at * your option) any later version. See the COPYING file in the top-level * directory. */ #include "qemu/osdep.h" #include "cpu_features.h" #define DEF_FEAT(_FEAT, _NAME, _TYPE, _BIT, _DESC) \ [S390_FEAT_##_FEAT] = { \ .name = _NAME, \ .type = S390_FEAT_TYPE_##_TYPE, \ .bit = _BIT, \ .desc = _DESC, \ }, static const S390FeatDef s390_features[S390_FEAT_MAX] = { #include "cpu_features_def.inc.h" }; #undef DEF_FEAT const S390FeatDef *s390_feat_def(S390Feat feat) { return &s390_features[feat]; } S390Feat s390_feat_by_type_and_bit(S390FeatType type, int bit) { S390Feat feat; for (feat = 0; feat < ARRAY_SIZE(s390_features); feat++) { if (s390_features[feat].type == type && s390_features[feat].bit == bit) { return feat; } } return S390_FEAT_MAX; } void s390_init_feat_bitmap(const S390FeatInit init, S390FeatBitmap bitmap) { int i, j; for (i = 0; i < (S390_FEAT_MAX / 64 + 1); i++) { if (init[i]) { for (j = 0; j < 64; j++) { if (init[i] & 1ULL << j) { set_bit(i * 64 + j, bitmap); } } } } } void s390_fill_feat_block(const S390FeatBitmap features, S390FeatType type, uint8_t *data) { S390Feat feat; int bit_nr; switch (type) { case S390_FEAT_TYPE_STFL: if (test_bit(S390_FEAT_ZARCH, features)) { /* Features that are always active */ set_be_bit(2, data); /* z/Architecture */ set_be_bit(138, data); /* Configuration-z-architectural-mode */ } break; case S390_FEAT_TYPE_PTFF: case S390_FEAT_TYPE_KMAC: case S390_FEAT_TYPE_KMC: case S390_FEAT_TYPE_KM: case S390_FEAT_TYPE_KIMD: case S390_FEAT_TYPE_KLMD: case S390_FEAT_TYPE_PCKMO: case S390_FEAT_TYPE_KMCTR: case S390_FEAT_TYPE_KMF: case S390_FEAT_TYPE_KMO: case S390_FEAT_TYPE_PCC: case S390_FEAT_TYPE_PPNO: case S390_FEAT_TYPE_KMA: case S390_FEAT_TYPE_KDSA: case S390_FEAT_TYPE_SORTL: case S390_FEAT_TYPE_DFLTCC: set_be_bit(0, data); /* query is always available */ break; default: break; }; feat = find_first_bit(features, S390_FEAT_MAX); while (feat < S390_FEAT_MAX) { if (s390_features[feat].type == type) { bit_nr = s390_features[feat].bit; /* big endian on uint8_t array */ set_be_bit(bit_nr, data); } feat = find_next_bit(features, S390_FEAT_MAX, feat + 1); } } void s390_add_from_feat_block(S390FeatBitmap features, S390FeatType type, uint8_t *data) { int nr_bits, le_bit; switch (type) { case S390_FEAT_TYPE_STFL: nr_bits = 16384; break; case S390_FEAT_TYPE_PLO: case S390_FEAT_TYPE_SORTL: case S390_FEAT_TYPE_DFLTCC: nr_bits = 256; break; default: /* all cpu subfunctions have 128 bit */ nr_bits = 128; }; le_bit = find_first_bit((unsigned long *) data, nr_bits); while (le_bit < nr_bits) { /* convert the bit number to a big endian bit nr */ S390Feat feat = s390_feat_by_type_and_bit(type, BE_BIT_NR(le_bit)); /* ignore unknown bits */ if (feat < S390_FEAT_MAX) { set_bit(feat, features); } le_bit = find_next_bit((unsigned long *) data, nr_bits, le_bit + 1); } } void s390_feat_bitmap_to_ascii(const S390FeatBitmap features, void *opaque, void (*fn)(const char *name, void *opaque)) { S390FeatBitmap bitmap, tmp; S390FeatGroup group; S390Feat feat; bitmap_copy(bitmap, features, S390_FEAT_MAX); /* process whole groups first */ for (group = 0; group < S390_FEAT_GROUP_MAX; group++) { const S390FeatGroupDef *def = s390_feat_group_def(group); bitmap_and(tmp, bitmap, def->feat, S390_FEAT_MAX); if (bitmap_equal(tmp, def->feat, S390_FEAT_MAX)) { bitmap_andnot(bitmap, bitmap, def->feat, S390_FEAT_MAX); fn(def->name, opaque); } } /* report leftovers as separate features */ feat = find_first_bit(bitmap, S390_FEAT_MAX); while (feat < S390_FEAT_MAX) { fn(s390_feat_def(feat)->name, opaque); feat = find_next_bit(bitmap, S390_FEAT_MAX, feat + 1); }; } #define FEAT_GROUP_INIT(_name, _group, _desc) \ { \ .name = _name, \ .desc = _desc, \ .init = { S390_FEAT_GROUP_LIST_ ## _group }, \ } /* indexed by feature group number for easy lookup */ static S390FeatGroupDef s390_feature_groups[] = { FEAT_GROUP_INIT("plo", PLO, "Perform-locked-operation facility"), FEAT_GROUP_INIT("tods", TOD_CLOCK_STEERING, "Tod-clock-steering facility"), FEAT_GROUP_INIT("gen13ptff", GEN13_PTFF, "PTFF enhancements introduced with z13"), FEAT_GROUP_INIT("msa", MSA, "Message-security-assist facility"), FEAT_GROUP_INIT("msa1", MSA_EXT_1, "Message-security-assist-extension 1 facility"), FEAT_GROUP_INIT("msa2", MSA_EXT_2, "Message-security-assist-extension 2 facility"), FEAT_GROUP_INIT("msa3", MSA_EXT_3, "Message-security-assist-extension 3 facility"), FEAT_GROUP_INIT("msa4", MSA_EXT_4, "Message-security-assist-extension 4 facility"), FEAT_GROUP_INIT("msa5", MSA_EXT_5, "Message-security-assist-extension 5 facility"), FEAT_GROUP_INIT("msa6", MSA_EXT_6, "Message-security-assist-extension 6 facility"), FEAT_GROUP_INIT("msa7", MSA_EXT_7, "Message-security-assist-extension 7 facility"), FEAT_GROUP_INIT("msa8", MSA_EXT_8, "Message-security-assist-extension 8 facility"), FEAT_GROUP_INIT("msa9", MSA_EXT_9, "Message-security-assist-extension 9 facility"), FEAT_GROUP_INIT("msa9_pckmo", MSA_EXT_9_PCKMO, "Message-security-assist-extension 9 PCKMO subfunctions"), FEAT_GROUP_INIT("mepochptff", MULTIPLE_EPOCH_PTFF, "PTFF enhancements introduced with Multiple-epoch facility"), FEAT_GROUP_INIT("esort", ENH_SORT, "Enhanced-sort facility"), FEAT_GROUP_INIT("deflate", DEFLATE_CONVERSION, "Deflate-conversion facility"), }; const S390FeatGroupDef *s390_feat_group_def(S390FeatGroup group) { return &s390_feature_groups[group]; } void init_groups(void) { int i; /* init all bitmaps from gnerated data initially */ for (i = 0; i < ARRAY_SIZE(s390_feature_groups); i++) { s390_init_feat_bitmap(s390_feature_groups[i].init, s390_feature_groups[i].feat); } }