linux-kernel - Re: [RFC PATCH 13/16] RISC-V: KVM: Add timer functionality

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Message-ID: <mvmpnlsc39p.fsf@suse.de>
Date:   Mon, 29 Jul 2019 16:40:50 +0200
From:   Andreas Schwab <schwab@...e.de>
To:     Anup Patel <Anup.Patel@....com>
Cc:     Palmer Dabbelt <palmer@...ive.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim K <rkrcmar@...hat.com>,
        Damien Le Moal <Damien.LeMoal@....com>,
        "kvm\@vger.kernel.org" <kvm@...r.kernel.org>,
        Anup Patel <anup@...infault.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@...radead.org>,
        Atish Patra <Atish.Patra@....com>,
        Alistair Francis <Alistair.Francis@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "linux-riscv\@lists.infradead.org" <linux-riscv@...ts.infradead.org>
Subject: Re: [RFC PATCH 13/16] RISC-V: KVM: Add timer functionality

On Jul 29 2019, Anup Patel <Anup.Patel@....com> wrote:

> From: Atish Patra <atish.patra@....com>
>
> The RISC-V hypervisor specification doesn't have any virtual timer
> feature.
>
> Due to this, the guest VCPU timer will be programmed via SBI calls.
> The host will use a separate hrtimer event for each guest VCPU to
> provide timer functionality. We inject a virtual timer interrupt to
> the guest VCPU whenever the guest VCPU hrtimer event expires.
>
> The following features are not supported yet and will be added in
> future:
> 1. A time offset to adjust guest time from host time
> 2. A saved next event in guest vcpu for vm migration

I'm getting this error:

In file included from <command-line>:
./include/clocksource/timer-riscv.h:12:30: error: unknown type name ‘u32’
   12 | void riscv_cs_get_mult_shift(u32 *mult, u32 *shift);
      |                              ^~~
./include/clocksource/timer-riscv.h:12:41: error: unknown type name ‘u32’
   12 | void riscv_cs_get_mult_shift(u32 *mult, u32 *shift);
      |                                         ^~~
make[1]: *** [scripts/Makefile.build:301: include/clocksource/timer-riscv.h.s] Error 1

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@...e.de
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