From: Xiang Chen <chenxiang66@hisilicon.com> virt inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IBPH85 ------------------------------------------------------------------------ When one of the following conditions occurs: 1. The index of VM table exceeds the supported range. 2. Guest sends SGI with IRM=1. 3. Guest sends multicast. it triggers a exception interrupt (PPI interrupt). Just printk exception info in interrupt handler. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: Jinqian Yang <yangjinqian1@huawei.com> --- arch/arm64/kvm/vgic/vgic-init.c | 36 +++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/arch/arm64/kvm/vgic/vgic-init.c b/arch/arm64/kvm/vgic/vgic-init.c index db5db9402c3a..7f19d1e27fc5 100644 --- a/arch/arm64/kvm/vgic/vgic-init.c +++ b/arch/arm64/kvm/vgic/vgic-init.c @@ -3,6 +3,7 @@ * Copyright (C) 2015, 2016 ARM Ltd. */ +#include <linux/acpi.h> #include <linux/uaccess.h> #include <linux/interrupt.h> #include <linux/cpu.h> @@ -531,17 +532,30 @@ int kvm_vgic_map_resources(struct kvm *kvm) return ret; } +extern struct static_key_false ipiv_enable; +static int ipiv_irq; + /* GENERIC PROBE */ void kvm_vgic_cpu_up(void) { enable_percpu_irq(kvm_vgic_global_state.maint_irq, 0); + if (static_branch_unlikely(&ipiv_enable)) + enable_percpu_irq(ipiv_irq, 0); } void kvm_vgic_cpu_down(void) { disable_percpu_irq(kvm_vgic_global_state.maint_irq); + if (static_branch_unlikely(&ipiv_enable)) + disable_percpu_irq(ipiv_irq); +} + +static irqreturn_t vgic_ipiv_irq_handler(int irq, void *data) +{ + kvm_info("IPIV irq handler!\n"); + return IRQ_HANDLED; } static irqreturn_t vgic_maintenance_handler(int irq, void *data) @@ -652,5 +666,27 @@ int kvm_vgic_hyp_init(void) } kvm_info("vgic interrupt IRQ%d\n", kvm_vgic_global_state.maint_irq); + + if (static_branch_unlikely(&ipiv_enable)) { + ipiv_irq = acpi_register_gsi(NULL, 18, ACPI_EDGE_SENSITIVE, + ACPI_ACTIVE_HIGH); + if (ipiv_irq < 0) { + kvm_err("No ipiv exception irq\n"); + free_percpu_irq(kvm_vgic_global_state.maint_irq, + kvm_get_running_vcpus()); + return -ENXIO; + } + + ret = request_percpu_irq(ipiv_irq, vgic_ipiv_irq_handler, + "ipiv exception", kvm_get_running_vcpus()); + if (ret) { + kvm_err("Cannot register interrupt %d\n", ipiv_irq); + free_percpu_irq(kvm_vgic_global_state.maint_irq, + kvm_get_running_vcpus()); + acpi_unregister_gsi(18); + return ret; + } + } + return 0; } -- 2.33.0