linux-kernel - [PATCH 0/4] IRQ affinity support in PLIC driver

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Message-Id: <20181022114517.22748-1-anup@brainfault.org>
Date:   Mon, 22 Oct 2018 17:15:13 +0530
From:   Anup Patel <anup@...infault.org>
To:     Palmer Dabbelt <palmer@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>
Cc:     Atish Patra <atish.patra@....com>,
        Christoph Hellwig <hch@...radead.org>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Anup Patel <anup@...infault.org>
Subject: [PATCH 0/4] IRQ affinity support in PLIC driver

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-4.19-rc2
and can be found at riscv_plic_irq_affinity_v1 branch of:
https://github.com/avpatel/linux.git

Anup Patel (4):
  irqchip: sifive-plic: Pre-compute context hart base and enable base
  irqchip: sifive-plic: More flexible plic_irq_toggle()
  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 | 164 ++++++++++++++++++------------
 1 file changed, 99 insertions(+), 65 deletions(-)

-- 
2.17.1