diff options
Diffstat (limited to 'tools/testing/selftests/kvm/include/kvm_util.h')
| -rw-r--r-- | tools/testing/selftests/kvm/include/kvm_util.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index 93013564428b..bee65ca08721 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -555,6 +555,41 @@ void kvm_get_stat(struct kvm_binary_stats *stats, const char *name, #define vm_get_stat(vm, stat) __get_stat(&(vm)->stats, stat) #define vcpu_get_stat(vcpu, stat) __get_stat(&(vcpu)->stats, stat) +static inline bool read_smt_control(char *buf, size_t buf_size) +{ + FILE *f = fopen("/sys/devices/system/cpu/smt/control", "r"); + bool ret; + + if (!f) + return false; + + ret = fread(buf, sizeof(*buf), buf_size, f) > 0; + fclose(f); + + return ret; +} + +static inline bool is_smt_possible(void) +{ + char buf[16]; + + if (read_smt_control(buf, sizeof(buf)) && + (!strncmp(buf, "forceoff", 8) || !strncmp(buf, "notsupported", 12))) + return false; + + return true; +} + +static inline bool is_smt_on(void) +{ + char buf[16]; + + if (read_smt_control(buf, sizeof(buf)) && !strncmp(buf, "on", 2)) + return true; + + return false; +} + void vm_create_irqchip(struct kvm_vm *vm); static inline int __vm_create_guest_memfd(struct kvm_vm *vm, uint64_t size, |