Implement IRQ bypass callbacks for arm/arm64 IRQ forwarding: - kvm_arch_irq_bypass_add_producer: perform VGIC/irqchip settings for forwarding - kvm_arch_irq_bypass_del_producer: same for inverse operation - kvm_arch_irq_bypass_stop: halt guest execution - kvm_arch_irq_bypass_start: resume guest execution and set CONFIG_HAVE_KVM_IRQ_BYPASS for arm/arm64. Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx> --- v3 -> v4: - kvm_set/unset_forward now takes the virtual IRQ ID as a parameter v2 -> v3: - kvm_arch_irq_bypass_resume renamed into kvm_arch_irq_bypass_start - kvm_vgic_unset_forward does not take the active bool param anymore - kvm_arch_irq_bypass_add_producer now returns an error value - remove kvm_arch_irq_bypass_update v1 -> v2: - struct kvm_kernel_irqfd is retrieved with container_of - function names changed --- arch/arm/kvm/Kconfig | 1 + arch/arm/kvm/arm.c | 37 +++++++++++++++++++++++++++++++++++++ arch/arm64/kvm/Kconfig | 1 + 3 files changed, 39 insertions(+) diff --git a/arch/arm/kvm/Kconfig b/arch/arm/kvm/Kconfig index 73d7201..4c9a95e 100644 --- a/arch/arm/kvm/Kconfig +++ b/arch/arm/kvm/Kconfig @@ -34,6 +34,7 @@ config KVM select HAVE_KVM_EVENTFD select HAVE_KVM_IRQFD select IRQ_BYPASS_MANAGER + select HAVE_KVM_IRQ_BYPASS depends on ARM_VIRT_EXT && ARM_LPAE && ARM_ARCH_TIMER ---help--- Support hosting virtualized guest machines. diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index eab83b2..99517bd 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -27,6 +27,8 @@ #include <linux/mman.h> #include <linux/sched.h> #include <linux/kvm.h> +#include <linux/kvm_irqfd.h> +#include <linux/irqbypass.h> #include <trace/events/kvm.h> #define CREATE_TRACE_POINTS @@ -1165,6 +1167,41 @@ struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr) return NULL; } +int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons, + struct irq_bypass_producer *prod) +{ + struct kvm_kernel_irqfd *irqfd = + container_of(cons, struct kvm_kernel_irqfd, consumer); + + return kvm_vgic_set_forward(irqfd->kvm, prod->irq, + irqfd->gsi + VGIC_NR_PRIVATE_IRQS); +} +void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons, + struct irq_bypass_producer *prod) +{ + struct kvm_kernel_irqfd *irqfd = + container_of(cons, struct kvm_kernel_irqfd, consumer); + + kvm_vgic_unset_forward(irqfd->kvm, prod->irq, + irqfd->gsi + VGIC_NR_PRIVATE_IRQS); +} + +void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *cons) +{ + struct kvm_kernel_irqfd *irqfd = + container_of(cons, struct kvm_kernel_irqfd, consumer); + + kvm_arm_halt_guest(irqfd->kvm); +} + +void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *cons) +{ + struct kvm_kernel_irqfd *irqfd = + container_of(cons, struct kvm_kernel_irqfd, consumer); + + kvm_arm_resume_guest(irqfd->kvm); +} + /** * Initialize Hyp-mode and memory mappings on all CPUs. */ diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index 64f460d..f6829af 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -38,6 +38,7 @@ config KVM select HAVE_KVM_IRQFD select KVM_ARM_VGIC_V3 select IRQ_BYPASS_MANAGER + select HAVE_KVM_IRQ_BYPASS ---help--- Support hosting virtualized guest machines. We don't support KVM with 16K page tables yet, due to the multiple -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html