/*
* CPU features/facilities for s390x
*
* Copyright IBM Corp. 2016, 2018
* Copyright Red Hat, Inc. 2019
*
* Author(s): David Hildenbrand <david@redhat.com>
*
* 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 "qemu/module.h"
#include "cpu_features.h"
#include "hw/s390x/pv.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.h.inc"
};
#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);
}
if (!s390_is_pv()) {
return;
}
/*
* Some facilities are not available for CPUs in protected mode:
* - All SIE facilities because SIE is not available
* - DIAG318
*
* As VMs can move in and out of protected mode the CPU model
* doesn't protect us from that problem because it is only
* validated at the start of the VM.
*/
switch (type) {
case S390_FEAT_TYPE_SCLP_CPU:
clear_be_bit(s390_feat_def(S390_FEAT_SIE_F2)->bit, data);
clear_be_bit(s390_feat_def(S390_FEAT_SIE_SKEY)->bit, data);
clear_be_bit(s390_feat_def(S390_FEAT_SIE_GPERE)->bit, data);
clear_be_bit(s390_feat_def(S390_FEAT_SIE_SIIF)->bit, data);
clear_be_bit(s390_feat_def(S390_FEAT_SIE_SIGPIF)->bit, data);
clear_be_bit(s390_feat_def(S390_FEAT_SIE_IB)->bit, data);
clear_be_bit(s390_feat_def(S390_FEAT_SIE_CEI)->bit, data);
break;
case S390_FEAT_TYPE_SCLP_CONF_CHAR:
clear_be_bit(s390_feat_def(S390_FEAT_SIE_GSLS)->bit, data);
clear_be_bit(s390_feat_def(S390_FEAT_HPMA2)->bit, data);
clear_be_bit(s390_feat_def(S390_FEAT_SIE_KSS)->bit, data);
break;
case S390_FEAT_TYPE_SCLP_CONF_CHAR_EXT:
clear_be_bit(s390_feat_def(S390_FEAT_SIE_64BSCAO)->bit, data);
clear_be_bit(s390_feat_def(S390_FEAT_SIE_CMMA)->bit, data);
clear_be_bit(s390_feat_def(S390_FEAT_SIE_PFMFI)->bit, data);
clear_be_bit(s390_feat_def(S390_FEAT_SIE_IBS)->bit, data);
break;
case S390_FEAT_TYPE_SCLP_FAC134:
clear_be_bit(s390_feat_def(S390_FEAT_DIAG_318)->bit, data);
break;
default:
return;
}
}
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];
}
static 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);
}
}
type_init(init_groups)
