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SubjectRe: [PATCH v3 1/2] irqchip/sifive-plic: Enable/Disable external interrupts upon cpu online/offline
On Mon,  2 Mar 2020 15:11:45 -0800
Atish Patra <> 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 <>
> Reviewed-by: Anup Patel <>

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


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