linux-kernel - Re: [PATCH v3 0/6] IRQ affinity support in PLIC driver

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Message-ID: <mhng-b072b061-91a6-40d3-a8a0-baf39cb7c33c@palmer-si-x1c4>
Date:   Thu, 20 Dec 2018 12:40:35 -0800 (PST)
From:   Palmer Dabbelt <palmer@...ive.com>
To:     anup@...infault.org
CC:     aou@...s.berkeley.edu, daniel.lezcano@...aro.org,
        tglx@...utronix.de, jason@...edaemon.net, marc.zyngier@....com,
        atish.patra@....com, Christoph Hellwig <hch@...radead.org>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject:     Re: [PATCH v3 0/6] IRQ affinity support in PLIC driver

On Mon, 17 Dec 2018 01:37:58 PST (-0800), anup@...infault.org wrote:
> On Fri, Nov 30, 2018 at 1:32 PM Anup Patel <anup@...infault.org> wrote:
>>
>> This patchset primarily adds IRQ affinity support in PLIC driver and
>> other improvements.
>>
>> The patchset gives mechanism for explicitly routing external interrupts to
>> particular CPUs using smp_affinity attribute of each Linux IRQs. Also, we
>> can now use IRQ balancer from kernel-space or user-space.
>>
>> The patchset is tested on QEMU virt machine. It is based on Linux-4.20-rc4
>> and can be found at riscv_plic_irq_affinity_v3 branch of:
>> https://github.com/avpatel/linux.git
>>
>> Changes since v2:
>>  - Fixed incorrect address of enable registers using sizeof(u32) in PATCH1
>>  - Retained comment about need for locking in PATCH1
>>  - Split PATCH2 into two patches
>>  - Split PATCH3 into two patches
>>  - Minor fix in commit description of PATCH4
>>
>> Changes since v1:
>>  - Removed few whitspace changes from PATCH1
>>  - Keep use of DEFINE_PER_CPU() as it is
>>
>> Anup Patel (6):
>>   irqchip: sifive-plic: Pre-compute context hart base and enable base
>>   irqchip: sifive-plic: Add struct plic_hw for global PLIC HW details
>>   irqchip: sifive-plic: More flexible plic_irq_toggle()
>>   irqchip: sifive-plic: Add warning in plic_init() if handler already
>>     present
>>   irqchip: sifive-plic: Differentiate between PLIC handler and context
>>   irqchip: sifive-plic: Implement irq_set_affinity() for SMP host
>>
>>  drivers/irqchip/irq-sifive-plic.c | 143 +++++++++++++++++++-----------
>>  1 file changed, 90 insertions(+), 53 deletions(-)
>>
>> --
>> 2.17.1
>>
>
> Any comments on this series?

I also haven't had a chance to look at these yet.