Re: Booting CDs in Qemu

[Robert Nestor <rnestor%mac.com@localhost>]

Just dawned on me, I’m betting the NetBSD CD is configured to boot either via BIOS or UEFI and Qemu is probably trying BIOS first since that’s its default.

-bob

On Aug 6, 2020, at 6:20 PM, Chavdar Ivanov <ci4ic4%gmail.com@localhost> wrote:

> With:
> 
> 
> /usr/pkg/bin/qemu-system-x86_64 \
>        -device qemu-xhci \
>        -device usb-tablet \
>        -machine q35 \
>        -bios /usr/pkg/share/ovmf/OVMFX64.fd \
>        -m 4096 \
>        -k en-gb \
>        -smp 2 \
>        -accel nvmm \
>        -vnc :1 \
>        -drive format=raw,file=/dev/zvol/rdsk/pail/testu-new \
>        -net tap,fd=3 3<>/dev/tap1 \
>        -net nic \
>        -cdrom /iso/NetBSD-9.99.69-amd64.iso
> 
> 
> I was able to boot today's -current in efi mode, no problem.
> Obviously, I access the console over vnc.
> 
> Chavdar
> 
> On Thu, 6 Aug 2020 at 23:33, Robert Nestor <rnestor%mac.com@localhost> wrote:
>> 
>> Something simple I must be missing here.  I downloaded the CD image of rEFInd from:
>>        http://sourceforge.net/projects/refind/files/0.12.0/refind-cd-0.12.0.zip/download
>> 
>> Burned it to a CD and tried booting that CD on my PC.  It doesn’t boot using BIOS, but it does boot using UEFI.  So I know the CD is good.  I saved the ISO file that I used to burn the CD.
>> 
>> Tried booting the ISO file in qemu with:
>>        qemu-system-x86_64 -boot d -cdrom refind.iso -m 512
>> 
>> And got an error that it couldn’t boot with error code 0009.  Ok this appears to mean that qemu tried booting it with a default BIOS boot which the CD isn’t configured for. The recommended solution is to either add the BIOS boot code to the CD or specify a OVMF/UEFI boot file to Qemu.
>> 
>> Installed the OVMF package and tried booting again with:
>>        qmeu-system-x86_64 -bios /usr/pkg/share/ovmf/OVMFX64.bin —m 512 \
>>               -boot d -cdrom refind.iso
>> 
>> Got the Tianocore splash screen then the UEFI shell.  Entered “exit” at the shell prompt and got a message "Graphics Console Started" and then nothing.  Also tried the OVMFIA32.fd file with identical results.  Adding “-vga std” to the command line didn’t change things either.
>> 
>> For grins I added “-accel mvmm” to the command line and got the error:
>>        Failed to execute a VCPU
>> 
>> So I have three questions:  First, what am I missing to get this bootable CD to boot up in qemu?  And second, is there a limitation in NVMM that prevents it from running this boot sequence? And finally, if I get the magic sequence that allows the CD to boot with qemu, is there a way of booting without getting the UEFI shell prompt?
>> 
>> Thanks
> 
> 
> 
> -- 
> ----