SEV_CMD_SNP_DF_FLUSH
ret = sev_do_cmd(SEV_CMD_SNP_DF_FLUSH, NULL, &error);
rc = __sev_do_cmd_locked(SEV_CMD_SNP_DF_FLUSH, NULL, error);
ret = __sev_do_cmd_locked(SEV_CMD_SNP_DF_FLUSH, NULL, &dfflush_error);