523 lines
17 KiB
C
523 lines
17 KiB
C
/*
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* CPU models for s390x
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*
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* Copyright 2016 IBM Corp.
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*
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* Author(s): David Hildenbrand <dahi@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "internal.h"
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#include "sysemu/tcg.h"
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#include "qemu-common.h"
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//#include "hw/pci/pci.h"
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#define CPUDEF_INIT(_type, _gen, _ec_ga, _mha_pow, _hmfai, _name, _desc) \
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{ \
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.name = _name, \
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.type = _type, \
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.gen = _gen, \
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.ec_ga = _ec_ga, \
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.mha_pow = _mha_pow, \
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.hmfai = _hmfai, \
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.desc = _desc, \
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.base_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _BASE }, \
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.default_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _DEFAULT }, \
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.full_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _FULL }, \
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}
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/*
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* CPU definition list in order of release. Up to generation 14 base features
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* of a following release have been a superset of the previous release. With
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* generation 15 one base feature and one optional feature have been deprecated.
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*/
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static S390CPUDef s390_cpu_defs[] = {
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CPUDEF_INIT(0x2064, 7, 1, 38, 0x00000000U, "z900", "IBM zSeries 900 GA1"),
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CPUDEF_INIT(0x2064, 7, 2, 38, 0x00000000U, "z900.2", "IBM zSeries 900 GA2"),
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CPUDEF_INIT(0x2064, 7, 3, 38, 0x00000000U, "z900.3", "IBM zSeries 900 GA3"),
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CPUDEF_INIT(0x2066, 7, 3, 38, 0x00000000U, "z800", "IBM zSeries 800 GA1"),
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CPUDEF_INIT(0x2084, 8, 1, 38, 0x00000000U, "z990", "IBM zSeries 990 GA1"),
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CPUDEF_INIT(0x2084, 8, 2, 38, 0x00000000U, "z990.2", "IBM zSeries 990 GA2"),
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CPUDEF_INIT(0x2084, 8, 3, 38, 0x00000000U, "z990.3", "IBM zSeries 990 GA3"),
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CPUDEF_INIT(0x2086, 8, 3, 38, 0x00000000U, "z890", "IBM zSeries 880 GA1"),
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CPUDEF_INIT(0x2084, 8, 4, 38, 0x00000000U, "z990.4", "IBM zSeries 990 GA4"),
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CPUDEF_INIT(0x2086, 8, 4, 38, 0x00000000U, "z890.2", "IBM zSeries 880 GA2"),
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CPUDEF_INIT(0x2084, 8, 5, 38, 0x00000000U, "z990.5", "IBM zSeries 990 GA5"),
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CPUDEF_INIT(0x2086, 8, 5, 38, 0x00000000U, "z890.3", "IBM zSeries 880 GA3"),
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CPUDEF_INIT(0x2094, 9, 1, 40, 0x00000000U, "z9EC", "IBM System z9 EC GA1"),
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CPUDEF_INIT(0x2094, 9, 2, 40, 0x00000000U, "z9EC.2", "IBM System z9 EC GA2"),
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CPUDEF_INIT(0x2096, 9, 2, 40, 0x00000000U, "z9BC", "IBM System z9 BC GA1"),
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CPUDEF_INIT(0x2094, 9, 3, 40, 0x00000000U, "z9EC.3", "IBM System z9 EC GA3"),
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CPUDEF_INIT(0x2096, 9, 3, 40, 0x00000000U, "z9BC.2", "IBM System z9 BC GA2"),
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CPUDEF_INIT(0x2097, 10, 1, 43, 0x00000000U, "z10EC", "IBM System z10 EC GA1"),
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CPUDEF_INIT(0x2097, 10, 2, 43, 0x00000000U, "z10EC.2", "IBM System z10 EC GA2"),
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CPUDEF_INIT(0x2098, 10, 2, 43, 0x00000000U, "z10BC", "IBM System z10 BC GA1"),
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CPUDEF_INIT(0x2097, 10, 3, 43, 0x00000000U, "z10EC.3", "IBM System z10 EC GA3"),
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CPUDEF_INIT(0x2098, 10, 3, 43, 0x00000000U, "z10BC.2", "IBM System z10 BC GA2"),
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CPUDEF_INIT(0x2817, 11, 1, 44, 0x08000000U, "z196", "IBM zEnterprise 196 GA1"),
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CPUDEF_INIT(0x2817, 11, 2, 44, 0x08000000U, "z196.2", "IBM zEnterprise 196 GA2"),
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CPUDEF_INIT(0x2818, 11, 2, 44, 0x08000000U, "z114", "IBM zEnterprise 114 GA1"),
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CPUDEF_INIT(0x2827, 12, 1, 44, 0x08000000U, "zEC12", "IBM zEnterprise EC12 GA1"),
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CPUDEF_INIT(0x2827, 12, 2, 44, 0x08000000U, "zEC12.2", "IBM zEnterprise EC12 GA2"),
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CPUDEF_INIT(0x2828, 12, 2, 44, 0x08000000U, "zBC12", "IBM zEnterprise BC12 GA1"),
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CPUDEF_INIT(0x2964, 13, 1, 47, 0x08000000U, "z13", "IBM z13 GA1"),
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CPUDEF_INIT(0x2964, 13, 2, 47, 0x08000000U, "z13.2", "IBM z13 GA2"),
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CPUDEF_INIT(0x2965, 13, 2, 47, 0x08000000U, "z13s", "IBM z13s GA1"),
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CPUDEF_INIT(0x3906, 14, 1, 47, 0x08000000U, "z14", "IBM z14 GA1"),
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CPUDEF_INIT(0x3906, 14, 2, 47, 0x08000000U, "z14.2", "IBM z14 GA2"),
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CPUDEF_INIT(0x3907, 14, 1, 47, 0x08000000U, "z14ZR1", "IBM z14 Model ZR1 GA1"),
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CPUDEF_INIT(0x8561, 15, 1, 47, 0x08000000U, "gen15a", "IBM z15 GA1"),
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CPUDEF_INIT(0x8562, 15, 1, 47, 0x08000000U, "gen15b", "IBM 8562 GA1"),
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};
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#define QEMU_MAX_CPU_TYPE 0x2964
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#define QEMU_MAX_CPU_GEN 13
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#define QEMU_MAX_CPU_EC_GA 2
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static const S390FeatInit qemu_max_cpu_feat_init = { S390_FEAT_LIST_QEMU_MAX };
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static S390FeatBitmap qemu_max_cpu_feat;
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/* features part of a base model but not relevant for finding a base model */
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S390FeatBitmap ignored_base_feat;
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void s390_cpudef_featoff(uint8_t gen, uint8_t ec_ga, S390Feat feat)
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{
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const S390CPUDef *def;
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def = s390_find_cpu_def(0, gen, ec_ga, NULL);
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clear_bit(feat, (unsigned long *)&def->default_feat);
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}
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void s390_cpudef_featoff_greater(uint8_t gen, uint8_t ec_ga, S390Feat feat)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
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const S390CPUDef *def = &s390_cpu_defs[i];
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if (def->gen < gen) {
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continue;
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}
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if (def->gen == gen && def->ec_ga < ec_ga) {
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continue;
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}
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clear_bit(feat, (unsigned long *)&def->default_feat);
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}
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}
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void s390_cpudef_group_featoff_greater(uint8_t gen, uint8_t ec_ga,
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S390FeatGroup group)
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{
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const S390FeatGroupDef *group_def = s390_feat_group_def(group);
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S390FeatBitmap group_def_off;
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int i;
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bitmap_complement(group_def_off, group_def->feat, S390_FEAT_MAX);
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for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
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const S390CPUDef *cpu_def = &s390_cpu_defs[i];
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if (cpu_def->gen < gen) {
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continue;
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}
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if (cpu_def->gen == gen && cpu_def->ec_ga < ec_ga) {
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continue;
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}
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bitmap_and((unsigned long *)&cpu_def->default_feat,
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cpu_def->default_feat, group_def_off, S390_FEAT_MAX);
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}
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}
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uint32_t s390_get_hmfai(void)
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{
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static S390CPU *cpu;
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if (!cpu) {
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cpu = S390_CPU(qemu_get_cpu(NULL, 0));
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}
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if (!cpu || !cpu->model) {
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return 0;
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}
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return cpu->model->def->hmfai;
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}
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uint8_t s390_get_mha_pow(void)
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{
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static S390CPU *cpu;
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if (!cpu) {
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cpu = S390_CPU(qemu_get_cpu(NULL, 0));
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}
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if (!cpu || !cpu->model) {
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return 0;
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}
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return cpu->model->def->mha_pow;
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}
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uint32_t s390_get_ibc_val(void)
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{
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uint16_t unblocked_ibc, lowest_ibc;
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static S390CPU *cpu;
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if (!cpu) {
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cpu = S390_CPU(qemu_get_cpu(NULL, 0));
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}
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if (!cpu || !cpu->model) {
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return 0;
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}
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unblocked_ibc = s390_ibc_from_cpu_model(cpu->model);
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lowest_ibc = cpu->model->lowest_ibc;
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/* the lowest_ibc always has to be <= unblocked_ibc */
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if (!lowest_ibc || lowest_ibc > unblocked_ibc) {
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return 0;
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}
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return ((uint32_t) lowest_ibc << 16) | unblocked_ibc;
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}
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void s390_get_feat_block(struct uc_struct *uc, S390FeatType type, uint8_t *data)
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{
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S390CPU *cpu = S390_CPU(qemu_get_cpu(uc, 0));
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s390_fill_feat_block(cpu->model->features, type, data);
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}
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bool s390_has_feat(struct uc_struct *uc, S390Feat feat)
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{
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S390CPU *cpu = S390_CPU(qemu_get_cpu(uc, 0));
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if (!cpu->model) {
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if (feat == S390_FEAT_ZPCI) {
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return true;
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}
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return false;
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}
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return test_bit(feat, cpu->model->features);
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}
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uint8_t s390_get_gen_for_cpu_type(uint16_t type)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
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if (s390_cpu_defs[i].type == type) {
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return s390_cpu_defs[i].gen;
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}
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}
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return 0;
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}
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const S390CPUDef *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
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S390FeatBitmap features)
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{
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const S390CPUDef *last_compatible = NULL;
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const S390CPUDef *matching_cpu_type = NULL;
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int i;
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if (!gen) {
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ec_ga = 0;
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}
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if (!gen && type) {
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gen = s390_get_gen_for_cpu_type(type);
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}
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for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
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const S390CPUDef *def = &s390_cpu_defs[i];
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S390FeatBitmap missing;
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/* don't even try newer generations if we know the generation */
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if (gen) {
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if (def->gen > gen) {
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break;
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} else if (def->gen == gen && ec_ga && def->ec_ga > ec_ga) {
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break;
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}
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}
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if (features) {
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/* see if the model satisfies the minimum features */
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bitmap_andnot(missing, def->base_feat, features, S390_FEAT_MAX);
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/*
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* Ignore certain features that are in the base model, but not
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* relevant for the search (esp. MSA subfunctions).
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*/
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bitmap_andnot(missing, missing, ignored_base_feat, S390_FEAT_MAX);
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if (!bitmap_empty(missing, S390_FEAT_MAX)) {
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break;
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}
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}
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/* stop the search if we found the exact model */
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if (def->type == type && def->ec_ga == ec_ga) {
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return def;
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}
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/* remember if we've at least seen one with the same cpu type */
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if (def->type == type) {
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matching_cpu_type = def;
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}
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last_compatible = def;
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}
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/* prefer the model with the same cpu type, esp. don't take the BC for EC */
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if (matching_cpu_type) {
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return matching_cpu_type;
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}
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return last_compatible;
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}
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static S390CPUModel *get_max_cpu_model(void);
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static S390CPUModel *get_max_cpu_model(void)
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{
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static S390CPUModel max_model;
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static bool cached;
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if (cached) {
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return &max_model;
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}
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max_model.def = s390_find_cpu_def(QEMU_MAX_CPU_TYPE, QEMU_MAX_CPU_GEN,
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QEMU_MAX_CPU_EC_GA, NULL);
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bitmap_copy(max_model.features, qemu_max_cpu_feat, S390_FEAT_MAX);
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cached = true;
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return &max_model;
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}
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static inline void apply_cpu_model(const S390CPUModel *model)
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{
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static S390CPUModel applied_model;
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static bool applied;
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/*
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* We have the same model for all VCPUs. KVM can only be configured before
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* any VCPUs are defined in KVM.
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*/
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if (applied) {
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if (model && memcmp(&applied_model, model, sizeof(S390CPUModel))) {
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// error_setg(errp, "Mixed CPU models are not supported on s390x.");
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}
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return;
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}
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applied = true;
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if (model) {
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applied_model = *model;
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}
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}
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void s390_realize_cpu_model(CPUState *cs)
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{
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S390CPU *cpu = S390_CPU(cs);
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const S390CPUModel *max_model;
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if (!cpu->model) {
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/* no host model support -> perform compatibility stuff */
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apply_cpu_model(NULL);
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return;
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}
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max_model = get_max_cpu_model();
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if (!max_model) {
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//error_prepend(errp, "CPU models are not available: ");
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return;
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}
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/* copy over properties that can vary */
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cpu->model->lowest_ibc = max_model->lowest_ibc;
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cpu->model->cpu_id = max_model->cpu_id;
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cpu->model->cpu_id_format = max_model->cpu_id_format;
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cpu->model->cpu_ver = max_model->cpu_ver;
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apply_cpu_model(cpu->model);
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cpu->env.cpuid = s390_cpuid_from_cpu_model(cpu->model);
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/* basic mode, write the cpu address into the first 4 bit of the ID */
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cpu->env.cpuid = deposit64(cpu->env.cpuid, 54, 4, cpu->env.core_id);
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}
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static void s390_cpu_model_initfn(CPUState *obj)
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{
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S390CPU *cpu = S390_CPU(obj);
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S390CPUClass *xcc = S390_CPU_GET_CLASS(cpu);
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cpu->model = g_malloc0(sizeof(*cpu->model));
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/* copy the model, so we can modify it */
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cpu->model->def = xcc->cpu_def;
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if (xcc->is_static) {
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/* base model - features will never change */
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bitmap_copy(cpu->model->features, cpu->model->def->base_feat,
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S390_FEAT_MAX);
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} else {
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/* latest model - features can change */
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bitmap_copy(cpu->model->features,
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cpu->model->def->default_feat, S390_FEAT_MAX);
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}
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}
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static S390CPUDef s390_qemu_cpu_def;
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static S390CPUModel s390_qemu_cpu_model;
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/* Set the qemu CPU model (on machine initialization). Must not be called
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* once CPUs have been created.
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*/
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void s390_set_qemu_cpu_model(uint16_t type, uint8_t gen, uint8_t ec_ga,
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const S390FeatInit feat_init)
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{
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const S390CPUDef *def = s390_find_cpu_def(type, gen, ec_ga, NULL);
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g_assert(def);
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//g_assert(QTAILQ_EMPTY_RCU(&cpus));
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/* TCG emulates some features that can usually not be enabled with
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* the emulated machine generation. Make sure they can be enabled
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* when using the QEMU model by adding them to full_feat. We have
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* to copy the definition to do that.
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*/
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memcpy(&s390_qemu_cpu_def, def, sizeof(s390_qemu_cpu_def));
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bitmap_or(s390_qemu_cpu_def.full_feat, s390_qemu_cpu_def.full_feat,
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qemu_max_cpu_feat, S390_FEAT_MAX);
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/* build the CPU model */
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s390_qemu_cpu_model.def = &s390_qemu_cpu_def;
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bitmap_zero(s390_qemu_cpu_model.features, S390_FEAT_MAX);
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s390_init_feat_bitmap(feat_init, s390_qemu_cpu_model.features);
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}
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static void s390_qemu_cpu_model_initfn(CPUState *obj)
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{
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S390CPU *cpu = S390_CPU(obj);
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cpu->model = g_malloc0(sizeof(*cpu->model));
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/* copy the CPU model so we can modify it */
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memcpy(cpu->model, &s390_qemu_cpu_model, sizeof(*cpu->model));
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}
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static void s390_max_cpu_model_initfn(CPUState *obj)
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{
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const S390CPUModel *max_model;
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S390CPU *cpu = S390_CPU(obj);
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max_model = get_max_cpu_model();
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cpu->model = g_new(S390CPUModel, 1);
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/* copy the CPU model so we can modify it */
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memcpy(cpu->model, max_model, sizeof(*cpu->model));
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}
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void s390_cpu_model_finalize(CPUState *obj)
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{
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S390CPU *cpu = S390_CPU(obj);
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g_free(cpu->model);
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g_free(cpu->ss.keydata);
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cpu->model = NULL;
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}
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static void s390_base_cpu_model_class_init(struct uc_struct *uc, CPUClass *oc, void *data)
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{
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S390CPUClass *xcc = S390_CPU_CLASS(oc);
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/* all base models are migration safe */
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xcc->cpu_def = (const S390CPUDef *) data;
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xcc->is_static = true;
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// xcc->desc = xcc->cpu_def->desc;
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}
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static void s390_cpu_model_class_init(struct uc_struct *uc, CPUClass *oc, void *data)
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{
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S390CPUClass *xcc = S390_CPU_CLASS(oc);
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/* model that can change between QEMU versions */
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xcc->cpu_def = (const S390CPUDef *) data;
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// xcc->is_migration_safe = true;
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// xcc->desc = xcc->cpu_def->desc;
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}
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|
|
|
static void s390_qemu_cpu_model_class_init(struct uc_struct *uc, CPUClass *oc, void *data)
|
|
{
|
|
//S390CPUClass *xcc = S390_CPU_CLASS(oc);
|
|
|
|
//xcc->desc = g_strdup_printf("QEMU Virtual CPU version %s",
|
|
// qemu_hw_version());
|
|
}
|
|
|
|
static void s390_max_cpu_model_class_init(struct uc_struct *uc, CPUClass *oc, void *data)
|
|
{
|
|
//S390CPUClass *xcc = S390_CPU_CLASS(oc);
|
|
|
|
/*
|
|
* The "max" model is neither static nor migration safe. Under KVM
|
|
* it represents the "host" model. Under TCG it represents some kind of
|
|
* "qemu" CPU model without compat handling and maybe with some additional
|
|
* CPU features that are not yet unlocked in the "qemu" model.
|
|
*/
|
|
//xcc->desc =
|
|
// "Enables all features supported by the accelerator in the current host";
|
|
}
|
|
|
|
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,
|
|
/* CSSKE is deprecated on newer generations */
|
|
S390_FEAT_CONDITIONAL_SSKE,
|
|
};
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(feats); i++) {
|
|
set_bit(feats[i], ignored_base_feat);
|
|
}
|
|
}
|
|
|
|
void s390_init_cpu_model(uc_engine *uc, uc_cpu_s390x cpu_model)
|
|
{
|
|
static const S390FeatInit qemu_latest_init = { S390_FEAT_LIST_QEMU_LATEST };
|
|
int i;
|
|
|
|
init_ignored_base_feat();
|
|
|
|
/* init all bitmaps from gnerated data initially */
|
|
s390_init_feat_bitmap(qemu_max_cpu_feat_init, qemu_max_cpu_feat);
|
|
for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
|
|
s390_init_feat_bitmap(s390_cpu_defs[i].base_init,
|
|
s390_cpu_defs[i].base_feat);
|
|
s390_init_feat_bitmap(s390_cpu_defs[i].default_init,
|
|
s390_cpu_defs[i].default_feat);
|
|
s390_init_feat_bitmap(s390_cpu_defs[i].full_init,
|
|
s390_cpu_defs[i].full_feat);
|
|
}
|
|
|
|
/* initialize the qemu model with latest definition */
|
|
s390_set_qemu_cpu_model(QEMU_MAX_CPU_TYPE, QEMU_MAX_CPU_GEN,
|
|
QEMU_MAX_CPU_EC_GA, qemu_latest_init);
|
|
|
|
if (cpu_model < ARRAY_SIZE(s390_cpu_defs)) {
|
|
s390_base_cpu_model_class_init(uc, uc->cpu->cc, (void *) &s390_cpu_defs[cpu_model]);
|
|
s390_cpu_model_class_init(uc, uc->cpu->cc, (void *) &s390_cpu_defs[cpu_model]);
|
|
s390_cpu_model_initfn(uc->cpu);
|
|
} else if (cpu_model == UC_CPU_S390X_MAX) {
|
|
s390_max_cpu_model_class_init(uc, uc->cpu->cc, NULL);
|
|
s390_max_cpu_model_initfn(uc->cpu);
|
|
} else if (cpu_model == UC_CPU_S390X_QEMU) {
|
|
s390_qemu_cpu_model_class_init(uc, uc->cpu->cc, NULL);
|
|
s390_qemu_cpu_model_initfn(uc->cpu);
|
|
}
|
|
|
|
}
|