Public bug reported: RISC-V EFI support is not yet in the Linux kernel (ca. 5.8: https://lkml.org/lkml/2020/4/20/1800), and while GRUB2 EFI Loader support needs to happen with the kernel (https://lists.gnu.org/archive/html/grub-devel/2020-04/msg00203.html), GRUB2 already has RISC-V EFI support. It can't currently boot anything, but it is a valid UEFI application and displays a pretty menu.
Please see the attached debdiff. Of note: * grub2 requires efibootmgr and efivar. I've filed Debian bugs to enable riscv64 for them (https://bugs.debian.org/cgi- bin/bugreport.cgi?bug=959498 and https://bugs.debian.org/cgi- bin/bugreport.cgi?bug=959499 respectively), but if this is actioned before those end up happening, it's a simple Architecture: update on each. * riscv-default-platform.patch: Upstreamed, allows `grub-install` to work without --platform. * riscv-relocation-offset.patch: Upstreamed, fixes "unaligned pointer" failure. * riscv-ubuntu-linuxefi.patch: Patches ubuntu-linuxefi.patch for riscv support; not sure if this should be integrated into ubuntu- linuxefi.patch. * Tested on qemu-system-riscv64 focal. ** Affects: grub2 (Ubuntu) Importance: Undecided Status: New ** Tags: patch ** Patch added: "grub2-riscv64.debdiff" https://bugs.launchpad.net/bugs/1876620/+attachment/5365841/+files/grub2-riscv64.debdiff ** Description changed: RISC-V EFI support is not yet in the Linux kernel (ca. 5.8: https://lkml.org/lkml/2020/4/20/1800), and while GRUB2 EFI Loader support needs to happen with the kernel (https://lists.gnu.org/archive/html/grub-devel/2020-04/msg00203.html), GRUB2 already has RISC-V EFI support. It can't currently boot anything, but it is a valid UEFI application and displays a pretty menu. Please see the attached debdiff. Of note: * grub2 requires efibootmgr and efivar. I've filed Debian bugs to enable riscv64 for them (https://bugs.debian.org/cgi- bin/bugreport.cgi?bug=959498 and https://bugs.debian.org/cgi- bin/bugreport.cgi?bug=959499 respectively), but if this is actioned before those end up happening, it's a simple Architecture: update on each. * riscv-default-platform.patch: Upstreamed, allows `grub-install` to work without --platform. - * riscv-relocation-offset.patch: Upstreamed: fixes "unaligned pointer" + * riscv-relocation-offset.patch: Upstreamed, fixes "unaligned pointer" failure. * riscv-ubuntu-linuxefi.patch: Patches ubuntu-linuxefi.patch for riscv support; not sure if this should be integrated into linuxefi.patch. * Tested on qemu-system-riscv64 focal. ** Description changed: RISC-V EFI support is not yet in the Linux kernel (ca. 5.8: https://lkml.org/lkml/2020/4/20/1800), and while GRUB2 EFI Loader support needs to happen with the kernel (https://lists.gnu.org/archive/html/grub-devel/2020-04/msg00203.html), GRUB2 already has RISC-V EFI support. It can't currently boot anything, but it is a valid UEFI application and displays a pretty menu. Please see the attached debdiff. Of note: * grub2 requires efibootmgr and efivar. I've filed Debian bugs to enable riscv64 for them (https://bugs.debian.org/cgi- bin/bugreport.cgi?bug=959498 and https://bugs.debian.org/cgi- bin/bugreport.cgi?bug=959499 respectively), but if this is actioned before those end up happening, it's a simple Architecture: update on each. * riscv-default-platform.patch: Upstreamed, allows `grub-install` to work without --platform. * riscv-relocation-offset.patch: Upstreamed, fixes "unaligned pointer" failure. * riscv-ubuntu-linuxefi.patch: Patches ubuntu-linuxefi.patch for riscv - support; not sure if this should be integrated into linuxefi.patch. + support; not sure if this should be integrated into ubuntu- + linuxefi.patch. * Tested on qemu-system-riscv64 focal. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1876620 Title: Enable riscv64 build To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1876620/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
