Introduce optional quiet mode (move technical output from console to /tmp/debug.log)

[tlaurion]

WiP

qemu-coreboot-fbwhiptail-tpm2-hotp-prod_quiet board addition

• Added a new board qemu-coreboot-fbwhiptail-tpm2-hotp-prod_quiet for building a coreboot ROM that works in the QEMU emulator with graphical mode support, HOTP support, TPM2 integration but runs in prod+quiet mode.

Logging Improvements:

• Updated the LOG() function in initrd/etc/ash_functions to handle different logging modes based on CONFIG_QUIET_MODE and CONFIG_DEBUG_OUTPUT settings. This ensures that logs are directed to the appropriate output (console or debug log) based on the configuration.
• Modified various scripts (initrd/etc/ash_functions, initrd/init, initrd/sbin/insmod) to use the updated LOG() function for consistent logging behavior. This includes logging TPM-related messages and other debug information. [1] [2]

Initialization Script Updates:

• Added a message in initrd/init to inform users when quiet mode is enabled, directing them to check the debug log for technical output.
• Improved error handling in initrd/init by adding error redirection to grep commands to avoid unnecessary output.

TODOs:

• add configuration settings toggle to switch between quiet mode and standard mode
• review videos to create additional issues, define what would close Extend LOG function to either output through DEBUG, console (std) or /tmp/debug/log if in quiet mode #1862

Notes: OEM can add quiet mode as part of their rebranding prior of releases.

---

WiP demo:

Current state of output (videos and /tmp/debug.log content) at #1863 (comment)

[tlaurion]

Current PR state videos ( as of a9c3284 )

TLDR default boot screenshot of console output:

Videos:

• default boot:
  https://github.com/user-attachments/assets/1ea0b902-4da5-4f5c-8b18-0bfd9c592037

• firmware flashed/firmwareupgrade/tampering, clean OS install, key previously fused in firmware:
  https://github.com/user-attachments/assets/89a453bd-53a1-4575-8c32-94fe943d28bb

The "technical output" redirected to /tmp/debug.log per same commit:

!!! Hit enter to proceed to recovery shell !!!

!!!!! Console recovery shell
!!!!! Starting recovery shell
~ # cat /tmp/debug.log 
Extracting CBFS file heads/initrd/.gnupg/pubring.kbx into /.gnupg/pubring.kbx
TPM: Extending PCR[7] with filename /.gnupg/pubring.kbx and then its content
TPM: Extending PCR[7] with /.gnupg/pubring.kbx
sha256: 7 : 0x36865F7C4725D07EE25C07BEAC46780BB45DCA781AD1B4C94E1F9816322732F0
TPM: Extending PCR[7] with /.gnupg/pubring.kbx
sha256: 7 : 0x12FF75F9263DFC7D50EB3F5F560BCC185FA62742999282CED3B6217F81FCBD0B
Extracting CBFS file heads/initrd/.gnupg/trustdb.gpg into /.gnupg/trustdb.gpg
TPM: Extending PCR[7] with filename /.gnupg/trustdb.gpg and then its content
TPM: Extending PCR[7] with /.gnupg/trustdb.gpg
sha256: 7 : 0xC0F07EDAB0C0D7B2E34293D389C1B86BE2F1A0398BD79F42420ECC85108E8633
TPM: Extending PCR[7] with /.gnupg/trustdb.gpg
sha256: 7 : 0x2B01B94DB1CF1013B068EA1EE9AAE02A6D4A74266D6047DFCD020A4F2D9AB8D3
TPM: Extending PCR[5] with /lib/modules/ehci-hcd.ko and parameters '' before loading
No module parameters, extending only with the module's content
TPM: Extending PCR[5] with /lib/modules/ehci-hcd.ko
sha256: 5 : 0x909690BD6F97E04B50958166F992B414D81A0D36B732B6A7DA951763541D1CF5
TPM: Extending PCR[5] with /lib/modules/uhci-hcd.ko and parameters '' before loading
No module parameters, extending only with the module's content
TPM: Extending PCR[5] with /lib/modules/uhci-hcd.ko
sha256: 5 : 0x8EC9D2802F8413D4F6C607B73A5103E568ED77E62FB9EEA6EDFDD5EF2693DFDF
TPM: Extending PCR[5] with /lib/modules/ohci-hcd.ko and parameters '' before loading
No module parameters, extending only with the module's content
TPM: Extending PCR[5] with /lib/modules/ohci-hcd.ko
sha256: 5 : 0x5A5A2C556E0204C43F40A8B45CA0FC19CFDFA97F6CFEBBD0D37AF8C342916F4A
TPM: Extending PCR[5] with /lib/modules/ohci-pci.ko and parameters '' before loading
No module parameters, extending only with the module's content
TPM: Extending PCR[5] with /lib/modules/ohci-pci.ko
sha256: 5 : 0x8BA29C95378766C29BEEFB929839549069585709C32EA253F4E11234766039C1
TPM: Extending PCR[5] with /lib/modules/ehci-pci.ko and parameters '' before loading
No module parameters, extending only with the module's content
TPM: Extending PCR[5] with /lib/modules/ehci-pci.ko
sha256: 5 : 0x3479F0982F2000A4052ADA1FA5485239FCD86C0EAD6F624FC300DA8A29C6157A
TPM: Extending PCR[5] with /lib/modules/xhci-hcd.ko and parameters '' before loading
No module parameters, extending only with the module's content
TPM: Extending PCR[5] with /lib/modules/xhci-hcd.ko
sha256: 5 : 0x76B689397B52935FCC087204CBFCAD42442577A38025DACC0C6481BFDC8609B4
TPM: Extending PCR[5] with /lib/modules/xhci-pci.ko and parameters '' before loading
No module parameters, extending only with the module's content
TPM: Extending PCR[5] with /lib/modules/xhci-pci.ko
sha256: 5 : 0x4BB1E1405AD1FA13B66FE9BB465B0DB0F18CA317B9802CE40D42589ACE26BF0E
kexec-parse-boot stdout: Debian GNU/Linux|elf|kernel /vmlinuz-6.1.0-21-amd64|initrd /initrd.img-6.1.0-21-amd64|append root=UUID=8c44b114-b625-440b-a708-177a6b510152 ro console=ttyS0 console=tty systemd.zram=0 quiet
kexec-parse-boot stdout: Debian GNU/Linux, with Linux 6.1.0-21-amd64|elf|kernel /vmlinuz-6.1.0-21-amd64|initrd /initrd.img-6.1.0-21-amd64|append root=UUID=8c44b114-b625-440b-a708-177a6b510152 ro console=ttyS0 console=tty systemd.zram=0 quiet
kexec-parse-boot stdout: Debian GNU/Linux, with Linux 6.1.0-21-amd64 (recovery mode)|elf|kernel /vmlinuz-6.1.0-21-amd64|initrd /initrd.img-6.1.0-21-amd64|append root=UUID=8c44b114-b625-440b-a708-177a6b510152 ro single console=ttyS0 console=tty systemd.zram=0
kexec-parse-boot stdout: Debian GNU/Linux, with Linux 6.1.0-18-amd64|elf|kernel /vmlinuz-6.1.0-18-amd64|initrd /initrd.img-6.1.0-18-amd64|append root=UUID=8c44b114-b625-440b-a708-177a6b510152 ro console=ttyS0 console=tty systemd.zram=0 quiet
kexec-parse-boot stdout: Debian GNU/Linux, with Linux 6.1.0-18-amd64 (recovery mode)|elf|kernel /vmlinuz-6.1.0-18-amd64|initrd /initrd.img-6.1.0-18-amd64|append root=UUID=8c44b114-b625-440b-a708-177a6b510152 ro single console=ttyS0 console=tty systemd.zram=0
TPM: Extending PCR[6] with hash of LUKS headers from /tmp/luksDump.txt
TPM: Extending PCR[6] with /tmp/luksDump.txt
sha256: 6 : 0xB98A2CA636FBA1C34E2DB5CEF4169FDF8562CA3D362E6C31E173A03CF110D095
TPM: Extending PCR[4] to prevent any further secret unsealing
TPM: Extending PCR[4] with recovery
sha256: 4 : 0x51737C77C481AA22095B38D38FC9FD494B0FFA4EAE7D3AC238082083D0AFD614