Hi Xiang, On Fri, Feb 03, 2023 at 03:24:37PM +0100, David Abdurachmanov wrote: > On Mon, Jan 3, 2022 at 1:13 PM Leo Liang <ycli...@andestech.com> wrote: > > > > On Thu, Dec 30, 2021 at 01:55:15AM +0800, Xiang W wrote: > > > 在 2021-12-29星期三的 17:23 +0800，Leo Liang写道： > > > > Hi Xiang, > > > > On Wed, Dec 22, 2021 at 07:32:53AM +0800, Xiang W wrote: > > > > > Various specifications of riscv allow the number of hart to be > > > > > greater than 32. The limit of 32 is determined by > > > > > gd->arch.available_harts. We can eliminate this limitation through > > > > > bitmaps. Currently, the number of hart is limited to 4095, and 4095 > > > > > is the limit of the RISC-V Advanced Core Local Interruptor > > > > > Specification. > > > > > > > > > > Test on sifive unmatched. > > > > > > > > > > Signed-off-by: Xiang W <wxj...@126.com> > > > > > --- > > > > > Changes since v1: > > > > > > > > > > * When NR_CPUS is very large, the value of GD_AVAILABLE_HARTS will > > > > > overflow the immediate range of ld/lw. This patch fixes this > > > > > problem > > > > > > > > > > arch/riscv/Kconfig | 4 ++-- > > > > > arch/riscv/cpu/start.S | 21 ++++++++++++++++----- > > > > > arch/riscv/include/asm/global_data.h | 4 +++- > > > > > arch/riscv/lib/smp.c | 2 +- > > > > > 4 files changed, 22 insertions(+), 9 deletions(-) > > > > > > > I noticed that this has never landed in U-Boot. Was this forgotten or > dropped for some reason (couldn't find anything)? > > The current limit on the Linux kernel side is 512. The default on > 64-bit (riscv64) is 64. > > david
The patch seems to cause some CI error (timeout on QEMU). (https://source.denx.de/u-boot/custodians/u-boot-riscv/-/pipelines/15076) Could you take a look at it if you have time? Best regards, Leo
