@@ -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.
@@ -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.
*/
@@ -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
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@linaro.org> --- 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(+) -- 1.9.1