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-rw-r--r--target-s390x/cpu_models.c75
-rw-r--r--target-s390x/cpu_models.h50
-rw-r--r--target-s390x/kvm.c295
3 files changed, 417 insertions, 3 deletions
diff --git a/target-s390x/cpu_models.c b/target-s390x/cpu_models.c
index 25ac2c9884..5b9f35ee87 100644
--- a/target-s390x/cpu_models.c
+++ b/target-s390x/cpu_models.c
@@ -162,6 +162,61 @@ bool s390_has_feat(S390Feat feat)
return test_bit(feat, cpu->model->features);
}
+uint8_t s390_get_gen_for_cpu_type(uint16_t type)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
+ if (s390_cpu_defs[i].type == type) {
+ return s390_cpu_defs[i].gen;
+ }
+ }
+ return 0;
+}
+
+const S390CPUDef *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
+ S390FeatBitmap features)
+{
+ const S390CPUDef *last_compatible = NULL;
+ int i;
+
+ if (!gen) {
+ ec_ga = 0;
+ }
+ if (!gen && type) {
+ gen = s390_get_gen_for_cpu_type(type);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
+ const S390CPUDef *def = &s390_cpu_defs[i];
+ S390FeatBitmap missing;
+
+ /* don't even try newer generations if we know the generation */
+ if (gen) {
+ if (def->gen > gen) {
+ break;
+ } else if (def->gen == gen && ec_ga && def->ec_ga > ec_ga) {
+ break;
+ }
+ }
+
+ if (features) {
+ /* see if the model satisfies the minimum features */
+ bitmap_andnot(missing, def->base_feat, features, S390_FEAT_MAX);
+ if (!bitmap_empty(missing, S390_FEAT_MAX)) {
+ break;
+ }
+ }
+
+ /* stop the search if we found the exact model */
+ if (def->type == type && def->ec_ga == ec_ga) {
+ return def;
+ }
+ last_compatible = def;
+ }
+ return last_compatible;
+}
+
struct S390PrintCpuListInfo {
FILE *f;
fprintf_function print;
@@ -324,7 +379,7 @@ static S390CPUModel *get_max_cpu_model(Error **errp)
}
if (kvm_enabled()) {
- error_setg(errp, "KVM does not support CPU models.");
+ kvm_s390_get_host_cpu_model(&max_model, errp);
} else {
/* TCG enulates a z900 */
max_model.def = &s390_cpu_defs[0];
@@ -357,8 +412,7 @@ static inline void apply_cpu_model(const S390CPUModel *model, Error **errp)
}
if (kvm_enabled()) {
- /* FIXME KVM */
- error_setg(errp, "KVM doesn't support CPU models.");
+ kvm_s390_apply_cpu_model(model, errp);
} else if (model) {
/* FIXME TCG - use data for stdip/stfl */
}
@@ -563,6 +617,21 @@ static void s390_cpu_model_initfn(Object *obj)
#ifdef CONFIG_KVM
static void s390_host_cpu_model_initfn(Object *obj)
{
+ S390CPU *cpu = S390_CPU(obj);
+ Error *err = NULL;
+
+ if (!kvm_enabled() || !kvm_s390_cpu_models_supported()) {
+ return;
+ }
+
+ cpu->model = g_malloc0(sizeof(*cpu->model));
+ kvm_s390_get_host_cpu_model(cpu->model, &err);
+ if (err) {
+ error_report_err(err);
+ g_free(cpu->model);
+ /* fallback to unsupported cpu models */
+ cpu->model = NULL;
+ }
}
#endif
diff --git a/target-s390x/cpu_models.h b/target-s390x/cpu_models.h
index 87de0fb12b..136a602313 100644
--- a/target-s390x/cpu_models.h
+++ b/target-s390x/cpu_models.h
@@ -49,7 +49,25 @@ typedef struct S390CPUModel {
uint8_t cpu_ver; /* CPU version, usually "ff" for kvm */
} S390CPUModel;
+/*
+ * CPU ID
+ *
+ * bits 0-7: Zeroes (ff for kvm)
+ * bits 8-31: CPU ID (serial number)
+ * bits 32-48: Machine type
+ * bits 48-63: Zeroes
+ */
+#define cpuid_type(x) (((x) >> 16) & 0xffff)
+#define cpuid_id(x) (((x) >> 32) & 0xffffff)
+#define cpuid_ver(x) (((x) >> 56) & 0xff)
+
+#define lowest_ibc(x) (((uint32_t)(x) >> 16) & 0xfff)
+#define unblocked_ibc(x) ((uint32_t)(x) & 0xfff)
+#define has_ibc(x) (lowest_ibc(x) != 0)
+
#define S390_GEN_Z10 0xa
+#define ibc_gen(x) (x == 0 ? 0 : ((x >> 4) + S390_GEN_Z10))
+#define ibc_ec_ga(x) (x & 0xf)
uint32_t s390_get_hmfai(void);
uint8_t s390_get_mha_pow(void);
@@ -65,5 +83,37 @@ static inline uint16_t s390_ibc_from_cpu_model(const S390CPUModel *model)
}
void s390_get_feat_block(S390FeatType type, uint8_t *data);
bool s390_has_feat(S390Feat feat);
+uint8_t s390_get_gen_for_cpu_type(uint16_t type);
+static inline bool s390_known_cpu_type(uint16_t type)
+{
+ return s390_get_gen_for_cpu_type(type) != 0;
+}
+static inline uint64_t s390_cpuid_from_cpu_model(const S390CPUModel *model)
+{
+ return ((uint64_t)model->cpu_ver << 56) |
+ ((uint64_t)model->cpu_id << 32) |
+ ((uint64_t)model->def->type << 16);
+}
+S390CPUDef const *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
+ S390FeatBitmap features);
+
+#ifdef CONFIG_KVM
+bool kvm_s390_cpu_models_supported(void);
+void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp);
+void kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp);
+#else
+static inline void kvm_s390_get_host_cpu_model(S390CPUModel *model,
+ Error **errp)
+{
+}
+static inline void kvm_s390_apply_cpu_model(const S390CPUModel *model,
+ Error **errp)
+{
+}
+static inline bool kvm_s390_cpu_models_supported(void)
+{
+ return false;
+}
+#endif
#endif /* TARGET_S390X_CPU_MODELS_H */
diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index 4f32a6b4a0..bbf8b2a3b4 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -2312,3 +2312,298 @@ int kvm_arch_msi_data_to_gsi(uint32_t data)
{
abort();
}
+
+static inline int test_bit_inv(long nr, const unsigned long *addr)
+{
+ return test_bit(BE_BIT_NR(nr), addr);
+}
+
+static inline void set_bit_inv(long nr, unsigned long *addr)
+{
+ set_bit(BE_BIT_NR(nr), addr);
+}
+
+static int query_cpu_subfunc(S390FeatBitmap features)
+{
+ struct kvm_s390_vm_cpu_subfunc prop;
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_CPU_MODEL,
+ .attr = KVM_S390_VM_CPU_MACHINE_SUBFUNC,
+ .addr = (uint64_t) &prop,
+ };
+ int rc;
+
+ rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
+ if (rc) {
+ return rc;
+ }
+
+ /*
+ * We're going to add all subfunctions now, if the corresponding feature
+ * is available that unlocks the query functions.
+ */
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_PLO, prop.plo);
+ if (test_bit(S390_FEAT_TOD_CLOCK_STEERING, features)) {
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_PTFF, prop.ptff);
+ }
+ if (test_bit(S390_FEAT_MSA, features)) {
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KMAC, prop.kmac);
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KMC, prop.kmc);
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KM, prop.km);
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KIMD, prop.kimd);
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KLMD, prop.klmd);
+ }
+ if (test_bit(S390_FEAT_MSA_EXT_3, features)) {
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_PCKMO, prop.pckmo);
+ }
+ if (test_bit(S390_FEAT_MSA_EXT_4, features)) {
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KMCTR, prop.kmctr);
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KMF, prop.kmf);
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KMO, prop.kmo);
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_PCC, prop.pcc);
+ }
+ if (test_bit(S390_FEAT_MSA_EXT_5, features)) {
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_PPNO, prop.ppno);
+ }
+ return 0;
+}
+
+static int configure_cpu_subfunc(const S390FeatBitmap features)
+{
+ struct kvm_s390_vm_cpu_subfunc prop = {};
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_CPU_MODEL,
+ .attr = KVM_S390_VM_CPU_PROCESSOR_SUBFUNC,
+ .addr = (uint64_t) &prop,
+ };
+
+ if (!kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
+ KVM_S390_VM_CPU_PROCESSOR_SUBFUNC)) {
+ /* hardware support might be missing, IBC will handle most of this */
+ return 0;
+ }
+
+ s390_fill_feat_block(features, S390_FEAT_TYPE_PLO, prop.plo);
+ if (test_bit(S390_FEAT_TOD_CLOCK_STEERING, features)) {
+ s390_fill_feat_block(features, S390_FEAT_TYPE_PTFF, prop.ptff);
+ prop.ptff[0] |= 0x80; /* query is always available */
+ }
+ if (test_bit(S390_FEAT_MSA, features)) {
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KMAC, prop.kmac);
+ prop.kmac[0] |= 0x80; /* query is always available */
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KMC, prop.kmc);
+ prop.kmc[0] |= 0x80; /* query is always available */
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KM, prop.km);
+ prop.km[0] |= 0x80; /* query is always available */
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KIMD, prop.kimd);
+ prop.kimd[0] |= 0x80; /* query is always available */
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KLMD, prop.klmd);
+ prop.klmd[0] |= 0x80; /* query is always available */
+ }
+ if (test_bit(S390_FEAT_MSA_EXT_3, features)) {
+ s390_fill_feat_block(features, S390_FEAT_TYPE_PCKMO, prop.pckmo);
+ prop.pckmo[0] |= 0x80; /* query is always available */
+ }
+ if (test_bit(S390_FEAT_MSA_EXT_4, features)) {
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KMCTR, prop.kmctr);
+ prop.kmctr[0] |= 0x80; /* query is always available */
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KMF, prop.kmf);
+ prop.kmf[0] |= 0x80; /* query is always available */
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KMO, prop.kmo);
+ prop.kmo[0] |= 0x80; /* query is always available */
+ s390_fill_feat_block(features, S390_FEAT_TYPE_PCC, prop.pcc);
+ prop.pcc[0] |= 0x80; /* query is always available */
+ }
+ if (test_bit(S390_FEAT_MSA_EXT_5, features)) {
+ s390_fill_feat_block(features, S390_FEAT_TYPE_PPNO, prop.ppno);
+ prop.ppno[0] |= 0x80; /* query is always available */
+ }
+ return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
+}
+
+static int kvm_to_feat[][2] = {
+ { KVM_S390_VM_CPU_FEAT_ESOP, S390_FEAT_ESOP },
+ { KVM_S390_VM_CPU_FEAT_SIEF2, S390_FEAT_SIE_F2 },
+ { KVM_S390_VM_CPU_FEAT_64BSCAO , S390_FEAT_SIE_64BSCAO },
+ { KVM_S390_VM_CPU_FEAT_SIIF, S390_FEAT_SIE_SIIF },
+ { KVM_S390_VM_CPU_FEAT_GPERE, S390_FEAT_SIE_GPERE },
+ { KVM_S390_VM_CPU_FEAT_GSLS, S390_FEAT_SIE_GSLS },
+ { KVM_S390_VM_CPU_FEAT_IB, S390_FEAT_SIE_IB },
+ { KVM_S390_VM_CPU_FEAT_CEI, S390_FEAT_SIE_CEI },
+ { KVM_S390_VM_CPU_FEAT_IBS, S390_FEAT_SIE_IBS },
+ { KVM_S390_VM_CPU_FEAT_SKEY, S390_FEAT_SIE_SKEY },
+ { KVM_S390_VM_CPU_FEAT_CMMA, S390_FEAT_SIE_CMMA },
+ { KVM_S390_VM_CPU_FEAT_PFMFI, S390_FEAT_SIE_PFMFI},
+ { KVM_S390_VM_CPU_FEAT_SIGPIF, S390_FEAT_SIE_SIGPIF},
+};
+
+static int query_cpu_feat(S390FeatBitmap features)
+{
+ struct kvm_s390_vm_cpu_feat prop;
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_CPU_MODEL,
+ .attr = KVM_S390_VM_CPU_MACHINE_FEAT,
+ .addr = (uint64_t) &prop,
+ };
+ int rc;
+ int i;
+
+ rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
+ if (rc) {
+ return rc;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(kvm_to_feat); i++) {
+ if (test_bit_inv(kvm_to_feat[i][0], (unsigned long *)prop.feat)) {
+ set_bit(kvm_to_feat[i][1], features);
+ }
+ }
+ return 0;
+}
+
+static int configure_cpu_feat(const S390FeatBitmap features)
+{
+ struct kvm_s390_vm_cpu_feat prop = {};
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_CPU_MODEL,
+ .attr = KVM_S390_VM_CPU_PROCESSOR_FEAT,
+ .addr = (uint64_t) &prop,
+ };
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(kvm_to_feat); i++) {
+ if (test_bit(kvm_to_feat[i][1], features)) {
+ set_bit_inv(kvm_to_feat[i][0], (unsigned long *)prop.feat);
+ }
+ }
+ return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
+}
+
+bool kvm_s390_cpu_models_supported(void)
+{
+ return kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
+ KVM_S390_VM_CPU_MACHINE) &&
+ kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
+ KVM_S390_VM_CPU_PROCESSOR) &&
+ kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
+ KVM_S390_VM_CPU_MACHINE_FEAT) &&
+ kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
+ KVM_S390_VM_CPU_PROCESSOR_FEAT) &&
+ kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
+ KVM_S390_VM_CPU_MACHINE_SUBFUNC);
+}
+
+void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp)
+{
+ struct kvm_s390_vm_cpu_machine prop = {};
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_CPU_MODEL,
+ .attr = KVM_S390_VM_CPU_MACHINE,
+ .addr = (uint64_t) &prop,
+ };
+ uint16_t unblocked_ibc = 0, cpu_type = 0;
+ int rc;
+
+ memset(model, 0, sizeof(*model));
+
+ if (!kvm_s390_cpu_models_supported()) {
+ error_setg(errp, "KVM doesn't support CPU models");
+ return;
+ }
+
+ /* query the basic cpu model properties */
+ rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
+ if (rc) {
+ error_setg(errp, "KVM: Error querying host CPU model: %d", rc);
+ return;
+ }
+
+ cpu_type = cpuid_type(prop.cpuid);
+ if (has_ibc(prop.ibc)) {
+ model->lowest_ibc = lowest_ibc(prop.ibc);
+ unblocked_ibc = unblocked_ibc(prop.ibc);
+ }
+ model->cpu_id = cpuid_id(prop.cpuid);
+ model->cpu_ver = 0xff;
+
+ /* get supported cpu features indicated via STFL(E) */
+ s390_add_from_feat_block(model->features, S390_FEAT_TYPE_STFL,
+ (uint8_t *) prop.fac_mask);
+ /* dat-enhancement facility 2 has no bit but was introduced with stfle */
+ if (test_bit(S390_FEAT_STFLE, model->features)) {
+ set_bit(S390_FEAT_DAT_ENH_2, model->features);
+ }
+ /* get supported cpu features indicated e.g. via SCLP */
+ rc = query_cpu_feat(model->features);
+ if (rc) {
+ error_setg(errp, "KVM: Error querying CPU features: %d", rc);
+ return;
+ }
+ /* get supported cpu subfunctions indicated via query / test bit */
+ rc = query_cpu_subfunc(model->features);
+ if (rc) {
+ error_setg(errp, "KVM: Error querying CPU subfunctions: %d", rc);
+ return;
+ }
+
+ if (s390_known_cpu_type(cpu_type)) {
+ /* we want the exact model, even if some features are missing */
+ model->def = s390_find_cpu_def(cpu_type, ibc_gen(unblocked_ibc),
+ ibc_ec_ga(unblocked_ibc), NULL);
+ } else {
+ /* model unknown, e.g. too new - search using features */
+ model->def = s390_find_cpu_def(0, ibc_gen(unblocked_ibc),
+ ibc_ec_ga(unblocked_ibc),
+ model->features);
+ }
+ if (!model->def) {
+ error_setg(errp, "KVM: host CPU model could not be identified");
+ return;
+ }
+ /* strip of features that are not part of the maximum model */
+ bitmap_and(model->features, model->features, model->def->full_feat,
+ S390_FEAT_MAX);
+}
+
+void kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp)
+{
+ struct kvm_s390_vm_cpu_processor prop = {
+ .fac_list = { 0 },
+ };
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_CPU_MODEL,
+ .attr = KVM_S390_VM_CPU_PROCESSOR,
+ .addr = (uint64_t) &prop,
+ };
+ int rc;
+
+ if (!model) {
+ return;
+ }
+ if (!kvm_s390_cpu_models_supported()) {
+ error_setg(errp, "KVM doesn't support CPU models");
+ return;
+ }
+ prop.cpuid = s390_cpuid_from_cpu_model(model);
+ prop.ibc = s390_ibc_from_cpu_model(model);
+ /* configure cpu features indicated via STFL(e) */
+ s390_fill_feat_block(model->features, S390_FEAT_TYPE_STFL,
+ (uint8_t *) prop.fac_list);
+ rc = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
+ if (rc) {
+ error_setg(errp, "KVM: Error configuring the CPU model: %d", rc);
+ return;
+ }
+ /* configure cpu features indicated e.g. via SCLP */
+ rc = configure_cpu_feat(model->features);
+ if (rc) {
+ error_setg(errp, "KVM: Error configuring CPU features: %d", rc);
+ return;
+ }
+ /* configure cpu subfunctions indicated via query / test bit */
+ rc = configure_cpu_subfunc(model->features);
+ if (rc) {
+ error_setg(errp, "KVM: Error configuring CPU subfunctions: %d", rc);
+ return;
+ }
+}
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