diff options
Diffstat (limited to 'target/i386/sev.c')
| -rw-r--r-- | target/i386/sev.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/target/i386/sev.c b/target/i386/sev.c index 2d14879166..0132beaf24 100644 --- a/target/i386/sev.c +++ b/target/i386/sev.c @@ -516,6 +516,68 @@ sev_launch_update_data(uint8_t *addr, uint64_t len) return ret; } +static void +sev_launch_get_measure(Notifier *notifier, void *unused) +{ + int ret, error; + guchar *data; + SEVState *s = sev_state; + struct kvm_sev_launch_measure *measurement; + + if (!sev_check_state(SEV_STATE_LAUNCH_UPDATE)) { + return; + } + + measurement = g_new0(struct kvm_sev_launch_measure, 1); + + /* query the measurement blob length */ + ret = sev_ioctl(sev_state->sev_fd, KVM_SEV_LAUNCH_MEASURE, + measurement, &error); + if (!measurement->len) { + error_report("%s: LAUNCH_MEASURE ret=%d fw_error=%d '%s'", + __func__, ret, error, fw_error_to_str(errno)); + goto free_measurement; + } + + data = g_new0(guchar, measurement->len); + measurement->uaddr = (unsigned long)data; + + /* get the measurement blob */ + ret = sev_ioctl(sev_state->sev_fd, KVM_SEV_LAUNCH_MEASURE, + measurement, &error); + if (ret) { + error_report("%s: LAUNCH_MEASURE ret=%d fw_error=%d '%s'", + __func__, ret, error, fw_error_to_str(errno)); + goto free_data; + } + + sev_set_guest_state(SEV_STATE_LAUNCH_SECRET); + + /* encode the measurement value and emit the event */ + s->measurement = g_base64_encode(data, measurement->len); + trace_kvm_sev_launch_measurement(s->measurement); + +free_data: + g_free(data); +free_measurement: + g_free(measurement); +} + +char * +sev_get_launch_measurement(void) +{ + if (sev_state && + sev_state->state >= SEV_STATE_LAUNCH_SECRET) { + return g_strdup(sev_state->measurement); + } + + return NULL; +} + +static Notifier sev_machine_done_notify = { + .notify = sev_launch_get_measure, +}; + void * sev_guest_init(const char *id) { @@ -593,6 +655,7 @@ sev_guest_init(const char *id) } ram_block_notifier_add(&sev_ram_notifier); + qemu_add_machine_init_done_notifier(&sev_machine_done_notify); return s; err: |