[U-Boot] [PATCH] travis: Use kernel.org pre-built toolchain for riscv

[Bin Meng]

Hi Rick,

On Tue, Sep 4, 2018 at 1:36 PM Rick Chen <rickchen36 at gmail.com> wrote:
>
>  > From: Tom Rini [mailto:trini at konsulko.com]
>  > Sent: Tuesday, September 04, 2018 3:24 AM
>  > To: Bin Meng
>  > Cc: U-Boot Mailing List; Rick Jian-Zhi Chen(陳建志)
>  > Subject: Re: [PATCH] travis: Use kernel.org pre-built toolchain for riscv
>  >
>  > On Mon, Sep 03, 2018 at 05:50:39PM +0800, Bin Meng wrote:
>  > > Hi Tom,
>  > >
>  > > On Thu, Aug 30, 2018 at 9:12 PM Bin Meng <bmeng.cn at gmail.com> wrote:
>  > > >
>  > > > This updates travis configuration to use kernel.org pre-built
>  > > > toolchain for riscv.
>  > > >
>  > > > Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
>  > > > ---
>  > > >
>  > > >  .travis.yml | 5 ++---
>  > > >  1 file changed, 2 insertions(+), 3 deletions(-)
>  > > >
>  > >
>  > > Since this is travis-ci changes, can we take this for v2018.09? I've
>  > > verified that it works well for current riscv build on travis-ci.org.
>  >
>  > Seeing as things are still working before this change I would like
> to see an ack
>  > from the custodian, thanks!
>  >
>  > --
>  > Tom
>
> Hi Bin
>
> I think lt is a positive way to use kernel.org pre-built toolchain for
> code coverage.
> And very agree with that.
>
> But there is a problem, it maybe encounter in the future.
> If I or someone try to add a private csr which the public toolchain
> may not recognize it.

I assume what you said "private" csr means "vendor-specific" csr that
is not defined by the risc-v ISA?

> How shall it be overcomed ? Do you have any ideas ?

I believe this shall be implemented properly by the toolchain itself.
Or we hardcode the instruction for such "private" csr if there is no
good solution from the toolchain side. Having a custom toolchain seems
not a good idea.

Regards,
Bin