diff options
Diffstat (limited to 'include/kvm/arm_vgic.h')
| -rw-r--r-- | include/kvm/arm_vgic.h | 115 |
1 files changed, 104 insertions, 11 deletions
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index f27000f55a8..35b0c121bb6 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -24,7 +24,6 @@ #include <linux/irqreturn.h> #include <linux/spinlock.h> #include <linux/types.h> -#include <linux/irqchip/arm-gic.h> #define VGIC_NR_IRQS 256 #define VGIC_NR_SGIS 16 @@ -32,7 +31,9 @@ #define VGIC_NR_PRIVATE_IRQS (VGIC_NR_SGIS + VGIC_NR_PPIS) #define VGIC_NR_SHARED_IRQS (VGIC_NR_IRQS - VGIC_NR_PRIVATE_IRQS) #define VGIC_MAX_CPUS KVM_MAX_VCPUS -#define VGIC_MAX_LRS (1 << 6) + +#define VGIC_V2_MAX_LRS (1 << 6) +#define VGIC_V3_MAX_LRS 16 /* Sanity checks... */ #if (VGIC_MAX_CPUS > 8) @@ -68,9 +69,62 @@ struct vgic_bytemap { u32 shared[VGIC_NR_SHARED_IRQS / 4]; }; +struct kvm_vcpu; + +enum vgic_type { + VGIC_V2, /* Good ol' GICv2 */ + VGIC_V3, /* New fancy GICv3 */ +}; + +#define LR_STATE_PENDING (1 << 0) +#define LR_STATE_ACTIVE (1 << 1) +#define LR_STATE_MASK (3 << 0) +#define LR_EOI_INT (1 << 2) + +struct vgic_lr { + u16 irq; + u8 source; + u8 state; +}; + +struct vgic_vmcr { + u32 ctlr; + u32 abpr; + u32 bpr; + u32 pmr; +}; + +struct vgic_ops { + struct vgic_lr (*get_lr)(const struct kvm_vcpu *, int); + void (*set_lr)(struct kvm_vcpu *, int, struct vgic_lr); + void (*sync_lr_elrsr)(struct kvm_vcpu *, int, struct vgic_lr); + u64 (*get_elrsr)(const struct kvm_vcpu *vcpu); + u64 (*get_eisr)(const struct kvm_vcpu *vcpu); + u32 (*get_interrupt_status)(const struct kvm_vcpu *vcpu); + void (*enable_underflow)(struct kvm_vcpu *vcpu); + void (*disable_underflow)(struct kvm_vcpu *vcpu); + void (*get_vmcr)(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr); + void (*set_vmcr)(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr); + void (*enable)(struct kvm_vcpu *vcpu); +}; + +struct vgic_params { + /* vgic type */ + enum vgic_type type; + /* Physical address of vgic virtual cpu interface */ + phys_addr_t vcpu_base; + /* Number of list registers */ + u32 nr_lr; + /* Interrupt number */ + unsigned int maint_irq; + /* Virtual control interface base address */ + void __iomem *vctrl_base; +}; + struct vgic_dist { #ifdef CONFIG_KVM_ARM_VGIC spinlock_t lock; + bool in_kernel; bool ready; /* Virtual control interface mapping */ @@ -110,6 +164,29 @@ struct vgic_dist { #endif }; +struct vgic_v2_cpu_if { + u32 vgic_hcr; + u32 vgic_vmcr; + u32 vgic_misr; /* Saved only */ + u32 vgic_eisr[2]; /* Saved only */ + u32 vgic_elrsr[2]; /* Saved only */ + u32 vgic_apr; + u32 vgic_lr[VGIC_V2_MAX_LRS]; +}; + +struct vgic_v3_cpu_if { +#ifdef CONFIG_ARM_GIC_V3 + u32 vgic_hcr; + u32 vgic_vmcr; + u32 vgic_misr; /* Saved only */ + u32 vgic_eisr; /* Saved only */ + u32 vgic_elrsr; /* Saved only */ + u32 vgic_ap0r[4]; + u32 vgic_ap1r[4]; + u64 vgic_lr[VGIC_V3_MAX_LRS]; +#endif +}; + struct vgic_cpu { #ifdef CONFIG_KVM_ARM_VGIC /* per IRQ to LR mapping */ @@ -120,24 +197,24 @@ struct vgic_cpu { DECLARE_BITMAP( pending_shared, VGIC_NR_SHARED_IRQS); /* Bitmap of used/free list registers */ - DECLARE_BITMAP( lr_used, VGIC_MAX_LRS); + DECLARE_BITMAP( lr_used, VGIC_V2_MAX_LRS); /* Number of list registers on this CPU */ int nr_lr; /* CPU vif control registers for world switch */ - u32 vgic_hcr; - u32 vgic_vmcr; - u32 vgic_misr; /* Saved only */ - u32 vgic_eisr[2]; /* Saved only */ - u32 vgic_elrsr[2]; /* Saved only */ - u32 vgic_apr; - u32 vgic_lr[VGIC_MAX_LRS]; + union { + struct vgic_v2_cpu_if vgic_v2; + struct vgic_v3_cpu_if vgic_v3; + }; #endif }; #define LR_EMPTY 0xff +#define INT_STATUS_EOI (1 << 0) +#define INT_STATUS_UNDERFLOW (1 << 1) + struct kvm; struct kvm_vcpu; struct kvm_run; @@ -157,9 +234,25 @@ int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu); bool vgic_handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run, struct kvm_exit_mmio *mmio); -#define irqchip_in_kernel(k) (!!((k)->arch.vgic.vctrl_base)) +#define irqchip_in_kernel(k) (!!((k)->arch.vgic.in_kernel)) #define vgic_initialized(k) ((k)->arch.vgic.ready) +int vgic_v2_probe(struct device_node *vgic_node, + const struct vgic_ops **ops, + const struct vgic_params **params); +#ifdef CONFIG_ARM_GIC_V3 +int vgic_v3_probe(struct device_node *vgic_node, + const struct vgic_ops **ops, + const struct vgic_params **params); +#else +static inline int vgic_v3_probe(struct device_node *vgic_node, + const struct vgic_ops **ops, + const struct vgic_params **params) +{ + return -ENODEV; +} +#endif + #else static inline int kvm_vgic_hyp_init(void) { |