Hi Alistair, On Thu, Sep 5, 2019 at 3:50 AM Alistair Francis <alistai...@gmail.com> wrote: > > On Sat, Aug 31, 2019 at 7:54 PM Bin Meng <bmeng...@gmail.com> wrote: > > > > As of today, the QEMU 'sifive_u' machine is a special target that does > > not boot the upstream OpenSBI/U-Boot firmware images built for the real > > SiFive HiFive Unleashed board. Hence OpenSBI supports a special platform > > "qemu/sifive_u". For U-Boot, the sifive_fu540_defconfig is referenced > > in the OpenSBI doc as its payload, but that does not boot at all due > > to various issues in current QEMU 'sifive_u' machine codes. > > > > This series aims to improve the emulation fidelity of sifive_u machine, > > so that the upstream OpenSBI, U-Boot and kernel images built for the > > SiFive HiFive Unleashed board can be used out of the box without any > > special hack. > > > > The major changes include: > > - Heterogeneous harts creation supported, so that we can create a CPU > > that exactly mirrors the real hardware: 1 E51 + 4 U54. > > - Implemented a PRCI model for FU540 > > - Implemented an OTP model for FU540, primarily used for storing serial > > number of the board > > - Fixed GEM support that was seriously broken on sifive_u > > - Synced device tree with upstream Linux kernel on sifive_u > > > > OpenSBI v0.4 image built for sifive/fu540 is included as the default > > bios image for 'sifive_u' machine. > > > > The series is tested against OpenSBI v0.4 image for sifive/fu540 > > paltform, U-Boot v2019.10-rc1 image for sifive_fu540_defconfig, > > and Linux kernel v5.3-rc3 image with the following patch: > > > > macb: Update compatibility string for SiFive FU540-C000 [1] > > > > OpenSBI + U-Boot, ping/tftpboot with U-Boot MACB driver works well. > > Boot Linux 64-bit defconfig image, verified that system console on > > the serial 0 and ping host work pretty well. > > > > An OpenSBI patch [2] was sent to drop the special "qemu/sifive_u" platform > > support in OpenSBI. The original plan was to get the drop patch applied > > after this QEMU series is merged. However after discussion in the OpenSBI > > mailing list, it seems the best option for us is to let OpenSBI continue > > shipping the special "qemu/sifive_u" platform support to work with QEMU > > version <= 4.1 and deprecate the support sometime in the future. A patch > > will need to be sent to OpenSBI mailing list to update its document. > > > > v4 is now rebased on Palmer's QEMU RISC-V repo "for-master" branch. > > Dropped the following v3 patch that was already done by someone else. > > - riscv: sifive_u: Generate an aliases node in the device tree > > - riscv: sifive_u: Support loading initramfs > > I'm having trouble applying this. Do you mind sharing a public git branch?
So I see Palmer has rebased his "for-master" branch against QEMU master and now this patch series cannot be applied cleanly. Even worse, the current "for-master" branch has build errors for QEMU RISC-V. Regards, Bin
