From: wanghaibin wanghaibin.wang@huawei.com
virt inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8K89F CVE: NA
------------------------------------------------------------------
Introudce vtimer_info in vgic_cpu, holds the vtimer vppi info for irqbypass extension.
Signed-off-by: wanghaibin wanghaibin.wang@huawei.com Signed-off-by: Zenghui Yu yuzenghui@huawei.com Signed-off-by: Kunkun Jiang jiangkunkun@huawei.com Signed-off-by: Dongxu Sun sundongxu3@huawei.com --- arch/arm64/kvm/vgic/vgic-init.c | 3 +++ arch/arm64/kvm/vgic/vgic.c | 26 ++++++++++++++++++++++++++ include/kvm/arm_vgic.h | 17 +++++++++++++++++ 3 files changed, 46 insertions(+)
diff --git a/arch/arm64/kvm/vgic/vgic-init.c b/arch/arm64/kvm/vgic/vgic-init.c index 980f20418a42..e150b8dd2538 100644 --- a/arch/arm64/kvm/vgic/vgic-init.c +++ b/arch/arm64/kvm/vgic/vgic-init.c @@ -222,6 +222,9 @@ int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu) /* PPIs */ irq->config = VGIC_CONFIG_LEVEL; } + + /* Needed? */ + irq->vtimer_info = NULL; }
if (!irqchip_in_kernel(vcpu->kvm)) diff --git a/arch/arm64/kvm/vgic/vgic.c b/arch/arm64/kvm/vgic/vgic.c index afb077b1cda6..5dc80c4a7a41 100644 --- a/arch/arm64/kvm/vgic/vgic.c +++ b/arch/arm64/kvm/vgic/vgic.c @@ -573,6 +573,32 @@ int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, unsigned int vintid) return 0; }
+int kvm_vgic_config_vtimer_irqbypass(struct kvm_vcpu *vcpu, u32 vintid, + bool (*get_as)(struct kvm_vcpu *, int), + void (*set_as)(struct kvm_vcpu *, int, bool)) +{ + struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu; + struct vtimer_info *vtimer = &vgic_cpu->vtimer; + struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, vintid); + unsigned long flags; + + if (WARN_ON_ONCE(!irq || !kvm_vgic_vtimer_irqbypass_support())) + return -EINVAL; + + vgic_cpu->vtimer_irqbypass = true; + + vtimer->intid = vintid; + vtimer->get_active_stat = get_as; + vtimer->set_active_stat = set_as; + + raw_spin_lock_irqsave(&irq->irq_lock, flags); + irq->vtimer_info = vtimer; + raw_spin_unlock_irqrestore(&irq->irq_lock, flags); + vgic_put_irq(vcpu->kvm, irq); + + return 0; +} + /** * kvm_vgic_set_owner - Set the owner of an interrupt for a VM * diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index 5871ea349fad..e3c7f23a3f48 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -33,6 +33,14 @@ #define irq_is_spi(irq) ((irq) >= VGIC_NR_PRIVATE_IRQS && \ (irq) <= VGIC_MAX_SPI)
+/* Information about HiSilicon implementation of vtimer (GICv4.1-based) */ +struct vtimer_info { + u32 intid; + + bool (*get_active_stat)(struct kvm_vcpu *vcpu, int vintid); + void (*set_active_stat)(struct kvm_vcpu *vcpu, int vintid, bool active); +}; + /*The number of lpi translation cache lists*/ #define LPI_TRANS_CACHES_NUM 8
@@ -148,6 +156,8 @@ struct vgic_irq {
void *owner; /* Opaque pointer to reserve an interrupt for in-kernel devices. */ + + struct vtimer_info *vtimer_info; /* vtimer interrupt only */ };
struct vgic_register_region; @@ -321,6 +331,10 @@ struct vgic_cpu {
struct vgic_irq private_irqs[VGIC_NR_PRIVATE_IRQS];
+ /* Indicate whether the vtimer irqbypass mode is used */ + bool vtimer_irqbypass; + struct vtimer_info vtimer; + raw_spinlock_t ap_list_lock; /* Protects the ap_list */
/* @@ -427,5 +441,8 @@ int kvm_vgic_v4_unset_forwarding(struct kvm *kvm, int irq, int vgic_v4_load(struct kvm_vcpu *vcpu); void vgic_v4_commit(struct kvm_vcpu *vcpu); int vgic_v4_put(struct kvm_vcpu *vcpu, bool need_db); +int kvm_vgic_config_vtimer_irqbypass(struct kvm_vcpu *vcpu, u32 vintid, + bool (*get_as)(struct kvm_vcpu *, int), + void (*set_as)(struct kvm_vcpu *, int, bool));
#endif /* __KVM_ARM_VGIC_H */