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In-Reply-To: <20230803-5b7e7c0d95597b004764a296@orel>
From:   Guo Ren <guoren@kernel.org>
Date:   Sat, 5 Aug 2023 09:31:23 +0800
Message-ID: <CAJF2gTRHGkHnQZNUi6J+xsst0-8CDJxp=79tPj=i_1s2SiW7Hg@mail.gmail.com>
Subject: Re: [PATCH 1/4] tools: riscv: Add header file csr.h
To:     Andrew Jones <ajones@ventanamicro.com>
Cc:     Haibo Xu <xiaobo55x@gmail.com>, Haibo Xu <haibo1.xu@intel.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Shuah Khan <shuah@kernel.org>,
        Anup Patel <anup@brainfault.org>,
        Atish Patra <atishp@atishpatra.org>,
        Sean Christopherson <seanjc@google.com>,
        Vipin Sharma <vipinsh@google.com>,
        Marc Zyngier <maz@kernel.org>,
        Colton Lewis <coltonlewis@google.com>,
        Andrew Jones <andrew.jones@linux.dev>,
        Vishal Annapurve <vannapurve@google.com>,
        linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
        kvm@vger.kernel.org, linux-kselftest@vger.kernel.org,
        kvm-riscv@lists.infradead.org
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On Thu, Aug 3, 2023 at 3:44=E2=80=AFPM Andrew Jones <ajones@ventanamicro.co=
m> wrote:
>
> On Wed, Aug 02, 2023 at 11:13:34PM -0400, Guo Ren wrote:
> > On Wed, Aug 02, 2023 at 10:05:00AM +0800, Haibo Xu wrote:
> > > On Fri, Jul 28, 2023 at 5:43=E2=80=AFPM Andrew Jones <ajones@ventanam=
icro.com> wrote:
> > > >
> > > > On Thu, Jul 27, 2023 at 03:20:05PM +0800, Haibo Xu wrote:
> > > > > Borrow some of the csr definitions and operations from kernel's
> > > > > arch/riscv/include/asm/csr.h to tools/ for riscv.
> > > >
> > > > You should copy the entire file verbatim.
> > > >
> > >
> > > Ok, will copy all the definitions in the original csr.h
> > Why not include the original one? Maintain the one csr.h is more
> > comfortable.
>
> selftests and other userspace tools can't always compile when including a
> kernel header without modifying the header in some way. Rather than
> polluting headers with #ifdeffery, the practice has been to copy necessar=
y
> headers to tools/include and modify if necessary.
Okay, got it.

>
> Thanks,
> drew


--=20
Best Regards
 Guo Ren