Re: [PATCH] riscv: kbuild: drop CONFIG_RISCV_ISA_C
From: Charles Papon
Date: Thu Aug 08 2019 - 08:19:08 EST
Please do not drop it.
Compressed instruction extension has some specific overhead in small
RISC-V FPGA softcore, especialy in the ones which can't implement the
register file read in a asynchronous manner because of the FPGA
What are reasons to enforce RVC ?
On Wed, Aug 7, 2019 at 2:29 PM Bin Meng <bmeng.cn@xxxxxxxxx> wrote:
> On Wed, Aug 7, 2019 at 10:30 AM Paul Walmsley <paul.walmsley@xxxxxxxxxx> wrote:
> > The baseline ISA support requirement for the RISC-V Linux kernel
> > mandates compressed instructions, so it doesn't make sense for
> > compressed instruction support to be configurable.
> > Signed-off-by: Paul Walmsley <paul.walmsley@xxxxxxxxxx>
> > Cc: Atish Patra <atish.patra@xxxxxxx>
> > ---
> > arch/riscv/Kconfig | 10 ----------
> > arch/riscv/Makefile | 2 +-
> > 2 files changed, 1 insertion(+), 11 deletions(-)
> Reviewed-by: Bin Meng <bmeng.cn@xxxxxxxxx>
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