> -----Original Message----- > From: Auer, Lukas <lukas.a...@aisec.fraunhofer.de> > Sent: Wednesday, March 6, 2019 2:52 PM > To: u-boot@lists.denx.de; Anup Patel <anup.pa...@wdc.com> > Cc: paul.walms...@sifive.com; ag...@suse.de; a...@brainfault.org; > bar...@tkos.co.il; daniel.schwierz...@gmail.com; bmeng...@gmail.com; > r...@andestech.com; s...@denx.de; sch...@suse.de; pal...@sifive.com; > Atish Patra <atish.pa...@wdc.com> > Subject: Re: [PATCH v2 0/9] SMP support for RISC-V > > On Wed, 2019-03-06 at 04:00 +0000, Anup Patel wrote: > > > -----Original Message----- > > > From: Lukas Auer <lukas.a...@aisec.fraunhofer.de> > > > Sent: Wednesday, March 6, 2019 4:23 AM > > > To: u-boot@lists.denx.de > > > Cc: Atish Patra <atish.pa...@wdc.com>; Anup Patel > > > <anup.pa...@wdc.com>; Bin Meng <bmeng...@gmail.com>; Andreas > Schwab > > > <sch...@suse.de>; Palmer Dabbelt <pal...@sifive.com>; Alexander > Graf > > > <ag...@suse.de>; Lukas Auer <lukas.a...@aisec.fraunhofer.de>; Anup > > > Patel <anup.pa...@wdc.com>; Anup Patel <a...@brainfault.org>; Rick > > > Chen <r...@andestech.com>; Baruch Siach <bar...@tkos.co.il>; Atish > > > Patra <atish.pa...@wdc.com> ; Stefan Roese <s...@denx.de>; Paul > > > Walmsley <paul.walms...@sifive.com> ; Daniel Schwierzeck > > > <daniel.schwierz...@gmail.com> > > > Subject: [PATCH v2 0/9] SMP support for RISC-V > > > > > > This patch series adds SMP support for RISC-V to U-Boot. It allows > > > U-Boot to run on multi-hart systems (hart is the RISC-V terminology > > > for hardware thread). Images passed to bootm will be started on all > > > harts. > > > The bootm command is currently the only one that will boot images on > > > all harts, bootefi is not yet supported. > > > > > > The patches have been successfully tested on both QEMU (machine and > > > supervisor mode) and the HiFive Unleashed board (supervisor mode), > > > using BBL and OpenSBI. > > > Mainline QEMU requires two patches [1, 2] to run in this > > > configuration. > > > > > > [1]: https://patchwork.ozlabs.org/patch/1039493/ > > > [2]: https://patchwork.ozlabs.org/patch/1039082/ > > > > > > Changes in v2: > > > - Remove unneeded quotes from NR_CPUS Kconfig entry > > > - Move memory barrier from send_ipi_many() to handle_ipi() > > > - Add check in send_ipi_many so that IPIs are only sent to available > > > harts as indicated by the available_harts mask > > > - Implement hart lottery to pick main hart to run U-Boot > > > - Remove CONFIG_MAIN_HART as it is not required anymore > > > - Register available harts in the available_harts mask > > > - New patch to populate register a0 with the hart ID from the > > > mhartid CSR in machine-mode > > > - New patch to enable SMP on the SiFive FU540, which was previously > > > sent independently > > > > > > Lukas Auer (9): > > > riscv: add infrastructure for calling functions on other harts > > > riscv: import the supervisor binary interface header file > > > riscv: implement IPI platform functions using SBI > > > riscv: delay initialization of caches and debug UART > > > riscv: add support for multi-hart systems > > > riscv: boot images passed to bootm on all harts > > > riscv: do not rely on hart ID passed by previous boot stage > > > riscv: fu540: enable SMP > > > riscv: qemu: enable SMP > > > > > > arch/riscv/Kconfig | 28 +++++ > > > arch/riscv/cpu/cpu.c | 9 +- > > > arch/riscv/cpu/start.S | 152 > > > +++++++++++++++++++++++++-- > > > arch/riscv/include/asm/csr.h | 1 + > > > arch/riscv/include/asm/global_data.h | 6 ++ > > > arch/riscv/include/asm/sbi.h | 94 +++++++++++++++++ > > > arch/riscv/include/asm/smp.h | 53 ++++++++++ > > > arch/riscv/lib/Makefile | 2 + > > > arch/riscv/lib/asm-offsets.c | 1 + > > > arch/riscv/lib/bootm.c | 13 ++- > > > arch/riscv/lib/sbi_ipi.c | 25 +++++ > > > arch/riscv/lib/smp.c | 116 ++++++++++++++++++++ > > > board/emulation/qemu-riscv/Kconfig | 1 + > > > board/sifive/fu540/Kconfig | 1 + > > > 14 files changed, 492 insertions(+), 10 deletions(-) create mode > > > 100644 > > > arch/riscv/include/asm/sbi.h create mode 100644 > > > arch/riscv/include/asm/smp.h create mode 100644 > > > arch/riscv/lib/sbi_ipi.c create mode 100644 arch/riscv/lib/smp.c > > > > > > -- > > > 2.20.1 > > > > I tried this series on U-Boot-2019.04-rc3 and works fine on SiFive > > Unleashed board. > > > > Tested-by: Anup Patel <anup.pa...@wdc.com> > > > > I have also pushed these patches to riscv_sifive_fu540_smp_v4 branch > > of https://github.com/avpatel/u-boot.git > > > > Thank you for testing the series, Anup! > Did you observe anymore issues, where not all harts enter Linux?
I tried using cold-boot (using power-on button) worked fine for me 10 times. I did not try more. We are trying to make OpenSBI stable with warm-boot (using reset button) as well but I have not tried that with U-Boot using reset button. Regards, Anup > > Thanks, > Lukas _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
