Provide an option to disable the transmission of logs to the serial console.

[agokarn]

Logging is initiated in main using Intel’s td_logger crate.
let _ = td_logger::init();

When log::info is called in MigTD rust code, it makes it way to the hypervisor as output on the serial port. Call flow –
log::info!("message")
↓ (macro expansion)
log::log!(Level::Info, "message")
↓ (calls registered logger)
LoggerBackend::log(&record)
↓ (calls td-logger internal)
tdlog!("{} - {}", level, args)
↓ (calls logger backend)
_log_ex(level, mask, format_args)
↓ (writes formatted string)
dbg_write_string(formatted_message)
↓ (writes each byte)
dbg_port_write(byte)
↓ (TDX hypercall)
tdvmcall_io_write_8(0x3F8, byte)
↓ (appears in)
Serial Console Output

is there a feature or a command line option to disable logging to the serial console in td_logger?

[jyao1]

@mgudaram

[mgudaram]

@agokarn Hi Arthi, does build command --log-level off work for you instead of --log-level info? Please let me know. Also, in general --log-level off is default in release MigTD. Thanks!