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Date:   Sun, 8 Mar 2020 13:59:31 +0000
From:   Marc Zyngier <maz@kernel.org>
To:     Atish Patra <atish.patra@wdc.com>
Cc:     linux-kernel@vger.kernel.org, Anup Patel <anup@brainfault.org>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Anju T Sudhakar <anju@linux.vnet.ibm.com>,
        Anup Patel <anup.patel@wdc.com>, Borislav Petkov <bp@suse.de>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        James Morse <james.morse@arm.com>,
        Jason Cooper <jason@lakedaemon.net>,
        linux-riscv@lists.infradead.org,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
        Steven Price <steven.price@arm.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ulf Hansson <ulf.hansson@linaro.org>,
        Vincent Chen <vincent.chen@sifive.com>
Subject: Re: [PATCH v3 1/2] irqchip/sifive-plic: Enable/Disable external
 interrupts upon cpu online/offline
Message-ID: <20200308135931.331f9be4@why>
In-Reply-To: <20200302231146.15530-2-atish.patra@wdc.com>
References: <20200302231146.15530-1-atish.patra@wdc.com>
        <20200302231146.15530-2-atish.patra@wdc.com>
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On Mon,  2 Mar 2020 15:11:45 -0800
Atish Patra <atish.patra@wdc.com> wrote:

> Currently, PLIC threshold is only initialized once in the beginning.
> However, threshold can be set to disabled if a CPU is marked offline with
> CPU hotplug feature. This will not allow to change the irq affinity to a
> CPU that just came online.
> 
> Add PLIC specific CPU hotplug callbacks and enable the threshold when a CPU
> comes online. Take this opportunity to move the external interrupt enable
> code from trap init to PLIC driver as well. On cpu offline path, the driver
> performs the exact opposite operations i.e. disable the interrupt and
> the threshold.
> 
> Signed-off-by: Atish Patra <atish.patra@wdc.com>
> Reviewed-by: Anup Patel <anup@brainfault.org>

Both patches queued for 5.7 (please add a cover letter when sending a
patch series).

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...