linux-kernel - Re: [PATCH 1/4] tools: riscv: Add header file csr.h

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Message-ID: <20230803-5b7e7c0d95597b004764a296@orel>
Date:   Thu, 3 Aug 2023 10:44:47 +0300
From:   Andrew Jones <ajones@...tanamicro.com>
To:     Guo Ren <guoren@...nel.org>
Cc:     Haibo Xu <xiaobo55x@...il.com>, Haibo Xu <haibo1.xu@...el.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Shuah Khan <shuah@...nel.org>,
        Anup Patel <anup@...infault.org>,
        Atish Patra <atishp@...shpatra.org>,
        Sean Christopherson <seanjc@...gle.com>,
        Vipin Sharma <vipinsh@...gle.com>,
        Marc Zyngier <maz@...nel.org>,
        Colton Lewis <coltonlewis@...gle.com>,
        Andrew Jones <andrew.jones@...ux.dev>,
        Vishal Annapurve <vannapurve@...gle.com>,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        kvm@...r.kernel.org, linux-kselftest@...r.kernel.org,
        kvm-riscv@...ts.infradead.org
Subject: Re: [PATCH 1/4] tools: riscv: Add header file csr.h

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 PM Andrew Jones <ajones@...tanamicro.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 necessary
headers to tools/include and modify if necessary.

Thanks,
drew