On Tue, May 23, 2023 at 04:05:04PM +0300, David Abdurachmanov wrote: > We run QEMU in a similar way as any other board. > > So it's U-Boot SPL, which then loads U-Boot ITB (which typically > contains U-Boot proper, OpenSBI FW_DYNAMIC generic binary, and DTB). > U-Boot SPL transfers control to OpenSBI and tells it how to load the > next stage (i.e U-Boot proper). Is there any documentation on how RISC-V boots now? And about the eventual goal that we're aiming for? > > > For the benefit of the search engine gods, this works for now: > > > > > > # virt-install --import --memory 8192 -n fedora-37-riscv \ > > > --arch riscv64 --vcpus 8 \ > > > --disk fedora-37-riscv.qcow2,format=qcow2 \ > > > --osinfo fedora37 \ > > > --qemu-commandline=' -bios /path/to/u-boot-spl.bin -device loader,file=/path/to/u-boot.itb,addr=0x80200000 ' > > This doesn't disable Sv48 and Sv57. I don't know the overall status, > but at least Golang 1.20 has a fix to support anything above Sv39. > > Not sure about other runtimes that do pointer tagging. > > See: https://bugs.launchpad.net/ubuntu/+source/linux-riscv/+bug/1991790 Interesting and informative bug. I guess I'm not using any golang binaries, as the guest totally seems to work fine. I'm a bit confused how this kernel detail leaks into userspace though. I thought userspace can use all 64 bits in pointers. > Simply put, older disk images on newer QEMU versions might not work properly. > > Note that we might want to switch to EDK2 in the future for QEMU, and > that probably will use two 32MiB pflash devices in virt machine. I > have seen, but haven't tested QEMU + EDK2 patches. Rich. > Cheers, > david > > > > > Based on the information above, using > > > > --boot kernel=/path/to/u-boot.bin > > > > should work... > > > > > 'Course you have to disable SELinux ... > > > > ... without requiring this :) > > > > -- > > Andrea Bolognani / Red Hat / Virtualization > > -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://people.redhat.com/~rjones/virt-top
