Hey Heiko, On Mon, Jun 12, 2023 at 11:04:39PM +0200, Heiko Stuebner wrote: > From: Heiko Stuebner <heiko.stuebner@xxxxxxxx> > > Add handling for Zbc extension. > > Zbc provides instruction for carry-less multiplication. > > Signed-off-by: Heiko Stuebner <heiko.stuebner@xxxxxxxx> > --- > arch/riscv/Kconfig | 22 ++++++++++++++++++++++ > arch/riscv/include/asm/hwcap.h | 1 + > arch/riscv/kernel/cpu.c | 1 + > arch/riscv/kernel/cpufeature.c | 1 + > 4 files changed, 25 insertions(+) Plumbing into the hwprobe stuff would be nice, but that's not a requirement for getting stuff merged :) > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > index a3d54cd14fca..754cd154eca5 100644 > --- a/arch/riscv/Kconfig > +++ b/arch/riscv/Kconfig > @@ -523,6 +523,28 @@ config RISCV_ISA_ZBB > > If you don't know what to do here, say Y. > > +config TOOLCHAIN_HAS_ZBC > + bool > + default y > + depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64ima_zbc) > + depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32ima_zbc) > + depends on LLD_VERSION >= 150000 || LD_VERSION >= 23900 > + depends on AS_IS_GNU > + > +config RISCV_ISA_ZBC > + bool "Zbc extension support for bit manipulation instructions" > + depends on TOOLCHAIN_HAS_ZBC > + depends on !XIP_KERNEL && MMU > + default y > + help > + Adds support to dynamically detect the presence of the ZBC Nit: s/ZBC/Zbc/ Reviewed-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> Cheers, Conor.
Attachment:
signature.asc
Description: PGP signature
