linux-kernel - Re: [PATCH v4 2/4] RISC-V: Add riscv_isa reprensenting ISA features common across CPUs

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Message-ID: <CAAhSdy2eP+z28XJmP9O6YPftQ=Rg6AwdSrVwu83igrfvYSRKhw@mail.gmail.com>
Date:   Wed, 7 Aug 2019 12:25:35 +0530
From:   Anup Patel <anup@...infault.org>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Atish Patra <atish.patra@....com>,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, Albert Ou <aou@...s.berkeley.edu>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Alan Kao <alankao@...estech.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Anup Patel <anup.patel@....com>,
        Johan Hovold <johan@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Palmer Dabbelt <palmer@...ive.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Enrico Weigelt <info@...ux.net>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v4 2/4] RISC-V: Add riscv_isa reprensenting ISA features
 common across CPUs

On Wed, Aug 7, 2019 at 12:21 PM Christoph Hellwig <hch@...radead.org> wrote:
>
> On Fri, Aug 02, 2019 at 09:27:21PM -0700, Atish Patra wrote:
> > From: Anup Patel <anup.patel@....com>
> >
> > This patch adds riscv_isa integer to represent ISA features common
> > across all CPUs. The riscv_isa is not same as elf_hwcap because
> > elf_hwcap will only have ISA features relevant for user-space apps
> > whereas riscv_isa will have ISA features relevant to both kernel
> > and user-space apps.
> >
> > One of the use case is KVM hypervisor where riscv_isa will be used
> > to do following operations:
>
> Please add this to the kvm series.  Right now this is just dead code.

Sure, I will include this patch in KVM series.

Regards,
Anup