On Fri, Apr 28, 2023 at 12:06:05PM -0700, Evan Green wrote: > > This change detects the presence of Zba and Zbb extensions and exports > them per-hart to userspace via the hwprobe mechanism. Glibc can then use > these in setting up hwcaps-based library search paths. > > There's a little bit of extra housekeeping here: the first change adds > Zba to the set of extensions the kernel recognizes, and the second > change starts tracking ISA features per-hart (in addition to the ANDed > mask of features across all harts which the kernel uses to make > decisions). Now that we track the ISA information per-hart, we could > even fix up /proc/cpuinfo to accurately report extension per-hart, > though I've left that out of this series for now. > > > Evan Green (3): > RISC-V: Add Zba extension probing > RISC-V: Track ISA extensions per hart > RISC-V: hwprobe: Expose Zba and Zbb > > Documentation/riscv/hwprobe.rst | 7 +++++ > arch/riscv/include/asm/cpufeature.h | 10 +++++++ > arch/riscv/include/asm/hwcap.h | 1 + > arch/riscv/include/uapi/asm/hwprobe.h | 2 ++ > arch/riscv/kernel/cpu.c | 1 + > arch/riscv/kernel/cpufeature.c | 19 ++++++++---- > arch/riscv/kernel/sys_riscv.c | 43 ++++++++++++++++++++++----- > 7 files changed, 70 insertions(+), 13 deletions(-) > > -- > 2.25.1 > For the series Reviewed-by: Andrew Jones <ajones@xxxxxxxxxxxxxxxx>
