Re: [PATCH v7 10/21] RISC-V: KVM: Handle MMIO exits for VCPU

From: Anup Patel
Date: Tue Sep 24 2019 - 01:08:02 EST


On Mon, Sep 23, 2019 at 7:03 PM Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote:
>
> On 23/09/19 15:09, Anup Patel wrote:
> >>> +#ifndef CONFIG_RISCV_ISA_C
> >>> + "li %[tilen], 4\n"
> >>> +#else
> >>> + "li %[tilen], 2\n"
> >>> +#endif
> >>
> >> Can you use an assembler directive to force using a non-compressed
> >> format for ld and lw? This would get rid of tilen, which is costing 6
> >> bytes (if I did the RVC math right) in order to save two. :)
> >
> > I tried looking for it but could not find any assembler directive
> > to selectively turn-off instruction compression.
>
> ".option norvc"?

Thanks for the hint. I will try ".option norvc"

Regards,
Anup

>
> Paolo