RE: unable to get virtual serial console for EFI
Date: Tue, 24 May 2022 12:26:31 UTC
Hi, I am trying to get the virtual serial console to access via putty while booting FreeBSD 13 arm64 bootonly on Hyper-V. Setting console="efi" is not helping to have the virtual serial console access using putty for ARM64. It is before any kernel module loaded. I can get the loader output in vmconnect.exe but not in the putty. Though I can see VM is getting connected to Hyper-V virtual COM1 console. But no output is coming to putty. I have following question : Any specific support from EFI firmware, is required for virtual serial to work in EFI loader in this phase of loading? I can see FreeBSD EFI loader is able to read the ConInDev and ConOutDev variables. With set console="efi" or set console="comconsole,efi" or set console="efi" , nothing in getting redirected in putty in arm64. But in X86 that is not the problem. Without this debugging the bring up of FreeBSD on arm64 Hyper-V is quite difficult. Any help or pointers are really appreciated. Regards, Souradeep From: Souradeep Chakrabarti Sent: Monday, May 23, 2022 3:28 PM To: arm@freebsd.org Cc: Wei Hu <weh@microsoft.com> Subject: unable to get virtual serial console for EFI Hi, I am trying to get the virtual serial console to access via putty while booting FreeBSD 13 arm64 bootonly on Hyper-V. Setting console="efi" is not helping to have the virtual serial console access using putty for ARM64. It is before any kernel module loaded. I can get the loader output in vmconnect.exe but not in the putty. Though I can see VM is getting connected to Hyper-V virtual COM1 console. But no output is coming to putty. I have following question : Any specific support from EFI firmware, is required for virtual serial to work in EFI loader in this phase of loading? I can see FreeBSD EFI loader is able to read the ConInDev and ConOutDev variables. With set console="efi" or set console="comconsole,efi" or set console="efi" , nothing in getting redirected in putty in arm64. But in X86 that is not the problem. Without this debugging the bring up of FreeBSD on arm64 Hyper-V is quite difficult. Any help or pointers are really appreciated. Regards, Souradeep