There are four times about EIOINTC_REG_ISR register group access in eiointc irq handler, in order to get all irq status about 256 interrupt vectors. It causes four times VM-exits since eiointc register are software emulated, here multiple interrupt pin routing is introduced and each 64 interrupt vector is routed to one interrupt pin. With this method, there will be only on one EIOINTC_REG_ISR register group acces in irq handler, it will reduce VM-exits. Bibo Mao (2): irqchip/loongson-eiointc: Route interrupt parsed from acpi table irqchip/loongson-eiointc: Add multiple interrupt pin routing support arch/loongarch/kernel/irq.c | 3 +- arch/loongarch/kernel/smp.c | 2 +- drivers/irqchip/irq-loongson-eiointc.c | 66 +++++++++++++++++++++++--- 3 files changed, 62 insertions(+), 9 deletions(-) base-commit: 1fb918967b56df3262ee984175816f0acb310501 -- 2.39.3
