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
