linux-kernel - Re: [PATCH v5 13/14] RISC-V: KVM: Support firmware events

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Message-ID: <20230206120445.6tlsvy5fsawn475v@orel>
Date:   Mon, 6 Feb 2023 13:04:45 +0100
From:   Andrew Jones <ajones@...tanamicro.com>
To:     Atish Patra <atishp@...osinc.com>
Cc:     linux-kernel@...r.kernel.org, Anup Patel <anup@...infault.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Atish Patra <atishp@...shpatra.org>,
        Guo Ren <guoren@...nel.org>, Heiko Stuebner <heiko@...ech.de>,
        kvm-riscv@...ts.infradead.org, kvm@...r.kernel.org,
        linux-riscv@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Will Deacon <will@...nel.org>
Subject: Re: [PATCH v5 13/14] RISC-V: KVM: Support firmware events

On Sat, Feb 04, 2023 at 05:15:14PM -0800, Atish Patra wrote:
> SBI PMU extension defines a set of firmware events which can provide
> useful information to guests about the number of SBI calls. As
> hypervisor implements the SBI PMU extension, these firmware events
> correspond to ecall invocations between VS->HS mode. All other firmware
> events will always report zero if monitored as KVM doesn't implement them.
> 
> This patch adds all the infrastructure required to support firmware
> events.
> 
> Reviewed-by: Anup Patel <anup@...infault.org>
> Signed-off-by: Atish Patra <atishp@...osinc.com>
> ---
>  arch/riscv/include/asm/kvm_vcpu_pmu.h |  17 ++++
>  arch/riscv/kvm/vcpu_pmu.c             | 141 ++++++++++++++++++++------
>  2 files changed, 125 insertions(+), 33 deletions(-)
>

Reviewed-by: Andrew Jones <ajones@...tanamicro.com>

Thanks,
drew