linux-kernel - Re: [PATCH v9 13/22] RISC-V: KVM: Add timer functionality

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Message-ID: <6bebc72a-3e30-0808-b7ba-2df2f0f801c7@linaro.org>
Date:   Wed, 4 Dec 2019 17:08:26 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Anup Patel <Anup.Patel@....com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim K <rkrcmar@...hat.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Alexander Graf <graf@...zon.com>,
        Atish Patra <Atish.Patra@....com>,
        Alistair Francis <Alistair.Francis@....com>,
        Damien Le Moal <Damien.LeMoal@....com>,
        Christoph Hellwig <hch@...radead.org>,
        Anup Patel <anup@...infault.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v9 13/22] RISC-V: KVM: Add timer functionality

On 16/10/2019 18:10, Anup Patel 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
> 
> Signed-off-by: Atish Patra <atish.patra@....com>
> Signed-off-by: Anup Patel <anup.patel@....com>
> Acked-by: Paolo Bonzini <pbonzini@...hat.com>
> Reviewed-by: Paolo Bonzini <pbonzini@...hat.com>

For the drivers/clocksource part:

Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>

[ ... ]

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