This patch implements the QMP command 'query-cpu-definitions' in the S390 context. The command returns a list of cpu model names in the current host context. A consumer may successfully request each listed cpu model as long for a given accelerator and machine this model is runnable. request: {"execute": "query-cpu-definitions", "arguments": { "accel": "kvm", "machine": "s390-ccw-virtio" } } answer: {"return": [ {"name":"2964-ga1","runnable":false,"is-default":false}, {"name":"2828-ga1","runnable":true,"is-default":false}, {"name":"2827-ga2","runnable":true,"is-default":true}, {"name":"2827-ga1","runnable":true,"is-default":false}, ... {"name":"2064-ga1","runnable":true,"is-default":false} ] } The request arguments are optional and if omitted only the cpu model names are returned without the runnable or is-default attributes. Signed-off-by: Michael Mueller <mimu@xxxxxxxxxxxxxxxxxx> --- target-s390x/cpu-models.c | 15 ++++++ target-s390x/cpu-models.h | 7 +++ target-s390x/cpu.c | 114 +++++++++++++++++++++++++++++++++++++++++++--- target-s390x/kvm.c | 49 +++++++++++++++++++- 4 files changed, 177 insertions(+), 8 deletions(-) diff --git a/target-s390x/cpu-models.c b/target-s390x/cpu-models.c index 187d110..aba44dd 100644 --- a/target-s390x/cpu-models.c +++ b/target-s390x/cpu-models.c @@ -215,6 +215,21 @@ int set_s390_cpu_alias(const char *name, const char *model) return 0; } +/* compare order of two cpu classes for descending sort */ +gint s390_cpu_class_desc_order_compare(gconstpointer a, gconstpointer b) +{ + S390CPUClass *cc_a = S390_CPU_CLASS((ObjectClass *) a); + S390CPUClass *cc_b = S390_CPU_CLASS((ObjectClass *) b); + + if (cc_a->mach.order < cc_b->mach.order) { + return 1; + } + if (cc_a->mach.order > cc_b->mach.order) { + return -1; + } + return 0; +} + /* return machine class for specific machine type */ static void s390_machine_class_test_cpu_class(gpointer data, gpointer user_data) { diff --git a/target-s390x/cpu-models.h b/target-s390x/cpu-models.h index 67f0519..4734c58 100644 --- a/target-s390x/cpu-models.h +++ b/target-s390x/cpu-models.h @@ -85,10 +85,16 @@ typedef struct S390MachineProps { } S390MachineProps; #ifdef CONFIG_KVM +int kvm_s390_get_machine_props(KVMState *s, S390MachineProps *prop); int kvm_s390_get_processor_props(S390ProcessorProps *prop); int kvm_s390_set_processor_props(S390ProcessorProps *prop); bool kvm_s390_cpu_classes_initialized(void); #else +static inline int kvm_s390_get_machine_props(KVMState *s, + S390MachineProps *prop) +{ + return -ENOSYS; +} static inline int kvm_s390_get_processor_props(S390ProcessorProps *prop) { return -ENOSYS; @@ -107,6 +113,7 @@ void s390_setup_cpu_classes(S390AccelMode mode, S390MachineProps *prop, uint64_t *fac_list_mask); void s390_setup_cpu_aliases(void); gint s390_cpu_class_asc_order_compare(gconstpointer a, gconstpointer b); +gint s390_cpu_class_desc_order_compare(gconstpointer a, gconstpointer b); void s390_cpu_list_entry(gpointer data, gpointer user_data); bool s390_cpu_classes_initialized(void); uint64_t *s390_fac_list_mask_by_machine(const char *name); diff --git a/target-s390x/cpu.c b/target-s390x/cpu.c index 615173f..0ccacb7 100644 --- a/target-s390x/cpu.c +++ b/target-s390x/cpu.c @@ -30,13 +30,21 @@ #include "hw/hw.h" #include "trace.h" #include "cpu-models.h" +#include "sysemu/accel.h" +#include "qapi/qmp/qerror.h" #ifndef CONFIG_USER_ONLY +#include "hw/boards.h" #include "sysemu/arch_init.h" #endif #define CR0_RESET 0xE0UL #define CR14_RESET 0xC2000000UL; +typedef struct CpuDefParm { + CpuDefinitionInfoList *list; + bool showFullEntry; +} CpuDefParm; + static inline char *strdup_s390_cpu_name(S390CPUClass *cc) { return g_strdup_printf("%04x-ga%u", cc->proc.type, cc->mach.ga); @@ -66,22 +74,114 @@ void s390_cpu_list(FILE *f, fprintf_function cpu_fprintf) } #ifndef CONFIG_USER_ONLY +static CpuDefinitionInfoList *qmp_query_cpu_definition_host(void) +{ + CpuDefinitionInfoList *host = NULL; + CpuDefinitionInfo *info; + + info = g_try_new0(CpuDefinitionInfo, 1); + if (!info) { + goto out; + } + info->name = g_strdup("host"); + + host = g_try_new0(CpuDefinitionInfoList, 1); + if (!host) { + g_free(info->name); + g_free(info); + goto out; + } + host->value = info; +out: + return host; +} + +static void qmp_query_cpu_definition_entry(gpointer data, gpointer user_data) +{ + ObjectClass *oc = (ObjectClass *) data; + S390CPUClass *cc = S390_CPU_CLASS(oc); + CpuDefinitionInfoList *entry; + CpuDefinitionInfo *info; + CpuDefParm *parm = user_data; + + if (!strcmp(object_class_get_name(oc), TYPE_S390_CPU)) { + return; + } + info = g_try_new0(CpuDefinitionInfo, 1); + if (!info) { + goto out; + } + info->name = strdup_s390_cpu_name(cc); + if (parm->showFullEntry) { + info->runnable = cc->is_active[ACCEL_TEMP]; + info->has_runnable = true; + info->is_default = cc->is_host[ACCEL_TEMP]; + info->has_is_default = true; + } + + entry = g_try_new0(CpuDefinitionInfoList, 1); + if (!entry) { + goto out; + } + entry->value = info; + entry->next = parm->list; + parm->list = entry; + return; +out: + if (info) { + g_free(info->name); + g_free(info); + } +} + CpuDefinitionInfoList *arch_query_cpu_definitions(bool has_machine, const char *machine, bool has_accel, AccelId accel, Error **errp) { - CpuDefinitionInfoList *entry; - CpuDefinitionInfo *info; + S390MachineProps mach; + GSList *classes; + uint64_t *mask; + CpuDefParm parm = { + .list = NULL, + .showFullEntry = false, + }; - info = g_malloc0(sizeof(*info)); - info->name = g_strdup("host"); + if (!s390_cpu_models_used()) { + return qmp_query_cpu_definition_host(); + } - entry = g_malloc0(sizeof(*entry)); - entry->value = info; + if (!has_accel || !has_machine) { + goto out; + } + + switch (accel) { + case ACCEL_ID_KVM: + if (kvm_s390_get_machine_props(NULL, &mach) < 0) { + return qmp_query_cpu_definition_host(); + } + break; + default: + goto out_empty; + } + + mask = s390_fac_list_mask_by_machine(machine); + if (!mask) { + error_set(errp, QERR_INVALID_PARAMETER_VALUE, "machine", + "a valid machine type"); + goto out_empty; + } - return entry; + s390_setup_cpu_classes(ACCEL_TEMP, &mach, mask); + parm.showFullEntry = true; +out: + classes = object_class_get_list(TYPE_S390_CPU, false); + classes = g_slist_sort(classes, s390_cpu_class_asc_order_compare); + g_slist_foreach(classes, qmp_query_cpu_definition_entry, &parm); + g_slist_free(classes); +out_empty: + return parm.list; } CpuModelInfo *arch_query_cpu_model(Error **errp) diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c index 9b2cfeb..f40e879 100644 --- a/target-s390x/kvm.c +++ b/target-s390x/kvm.c @@ -276,12 +276,59 @@ static int cpu_model_set(KVMState *s, uint64_t attr, uint64_t addr) return rc; } -static int kvm_s390_get_machine_props(KVMState *s, S390MachineProps *prop) +static int get_machine_props_fallback(S390MachineProps *prop) +{ + struct kvm_device_attr dev_attr; + int rc, kvmfd = -1, vmfd = -1; + + rc = qemu_open("/dev/kvm", O_RDWR); + if (rc < 0) { + goto out_err; + } + kvmfd = rc; + + rc = ioctl(kvmfd, KVM_CREATE_VM, 0); + if (rc < 0) { + goto out_err; + } + vmfd = rc; + + rc = ioctl(vmfd, KVM_CHECK_EXTENSION, KVM_CAP_VM_ATTRIBUTES); + if (rc < 0) { + rc = -ENOSYS; + goto out_err; + } + + dev_attr.group = KVM_S390_VM_CPU_MODEL; + dev_attr.attr = KVM_S390_VM_CPU_MACHINE; + rc = ioctl(vmfd, KVM_HAS_DEVICE_ATTR, &dev_attr); + if (rc < 0) { + rc = -EFAULT; + goto out_err; + } + + dev_attr.addr = (uint64_t) prop; + rc = ioctl(vmfd, KVM_GET_DEVICE_ATTR, &dev_attr); + +out_err: + if (vmfd >= 0) { + close(vmfd); + } + if (kvmfd >= 0) { + close(kvmfd); + } + + return rc; +} + +int kvm_s390_get_machine_props(KVMState *s, S390MachineProps *prop) { int rc = -EFAULT; if (s) { rc = cpu_model_get(s, KVM_S390_VM_CPU_MACHINE, (uint64_t) prop); + } else { + rc = get_machine_props_fallback(prop); } trace_kvm_get_machine_props(rc, prop->cpuid, prop->ibc_range); -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html