| /* |
| * Copyright (C) 2015, 2016 ARM Ltd. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| #ifndef __ASM_ARM_KVM_VGIC_VGIC_H |
| #define __ASM_ARM_KVM_VGIC_VGIC_H |
| |
| #include <linux/kernel.h> |
| #include <linux/kvm.h> |
| #include <linux/irqreturn.h> |
| #include <linux/spinlock.h> |
| #include <linux/types.h> |
| #include <kvm/iodev.h> |
| |
| #define VGIC_V3_MAX_CPUS 255 |
| #define VGIC_V2_MAX_CPUS 8 |
| #define VGIC_NR_IRQS_LEGACY 256 |
| #define VGIC_NR_SGIS 16 |
| #define VGIC_NR_PPIS 16 |
| #define VGIC_NR_PRIVATE_IRQS (VGIC_NR_SGIS + VGIC_NR_PPIS) |
| #define VGIC_MAX_PRIVATE (VGIC_NR_PRIVATE_IRQS - 1) |
| #define VGIC_MAX_SPI 1019 |
| #define VGIC_MAX_RESERVED 1023 |
| #define VGIC_MIN_LPI 8192 |
| |
| enum vgic_type { |
| VGIC_V2, /* Good ol' GICv2 */ |
| VGIC_V3, /* New fancy GICv3 */ |
| }; |
| |
| /* same for all guests, as depending only on the _host's_ GIC model */ |
| struct vgic_global { |
| /* type of the host GIC */ |
| enum vgic_type type; |
| |
| /* Physical address of vgic virtual cpu interface */ |
| phys_addr_t vcpu_base; |
| |
| /* virtual control interface mapping */ |
| void __iomem *vctrl_base; |
| |
| /* Number of implemented list registers */ |
| int nr_lr; |
| |
| /* Maintenance IRQ number */ |
| unsigned int maint_irq; |
| |
| /* maximum number of VCPUs allowed (GICv2 limits us to 8) */ |
| int max_gic_vcpus; |
| |
| /* Only needed for the legacy KVM_CREATE_IRQCHIP */ |
| bool can_emulate_gicv2; |
| }; |
| |
| extern struct vgic_global kvm_vgic_global_state; |
| |
| #define VGIC_V2_MAX_LRS (1 << 6) |
| #define VGIC_V3_MAX_LRS 16 |
| #define VGIC_V3_LR_INDEX(lr) (VGIC_V3_MAX_LRS - 1 - lr) |
| |
| enum vgic_irq_config { |
| VGIC_CONFIG_EDGE = 0, |
| VGIC_CONFIG_LEVEL |
| }; |
| |
| struct vgic_irq { |
| spinlock_t irq_lock; /* Protects the content of the struct */ |
| struct list_head ap_list; |
| |
| struct kvm_vcpu *vcpu; /* SGIs and PPIs: The VCPU |
| * SPIs and LPIs: The VCPU whose ap_list |
| * this is queued on. |
| */ |
| |
| struct kvm_vcpu *target_vcpu; /* The VCPU that this interrupt should |
| * be sent to, as a result of the |
| * targets reg (v2) or the |
| * affinity reg (v3). |
| */ |
| |
| u32 intid; /* Guest visible INTID */ |
| bool pending; |
| bool line_level; /* Level only */ |
| bool soft_pending; /* Level only */ |
| bool active; /* not used for LPIs */ |
| bool enabled; |
| bool hw; /* Tied to HW IRQ */ |
| u32 hwintid; /* HW INTID number */ |
| union { |
| u8 targets; /* GICv2 target VCPUs mask */ |
| u32 mpidr; /* GICv3 target VCPU */ |
| }; |
| u8 source; /* GICv2 SGIs only */ |
| u8 priority; |
| enum vgic_irq_config config; /* Level or edge */ |
| }; |
| |
| struct vgic_register_region; |
| |
| struct vgic_io_device { |
| gpa_t base_addr; |
| struct kvm_vcpu *redist_vcpu; |
| const struct vgic_register_region *regions; |
| int nr_regions; |
| struct kvm_io_device dev; |
| }; |
| |
| struct vgic_dist { |
| bool in_kernel; |
| bool ready; |
| |
| /* vGIC model the kernel emulates for the guest (GICv2 or GICv3) */ |
| u32 vgic_model; |
| |
| int nr_spis; |
| |
| /* TODO: Consider moving to global state */ |
| /* Virtual control interface mapping */ |
| void __iomem *vctrl_base; |
| |
| /* base addresses in guest physical address space: */ |
| gpa_t vgic_dist_base; /* distributor */ |
| union { |
| /* either a GICv2 CPU interface */ |
| gpa_t vgic_cpu_base; |
| /* or a number of GICv3 redistributor regions */ |
| gpa_t vgic_redist_base; |
| }; |
| |
| /* distributor enabled */ |
| bool enabled; |
| |
| struct vgic_irq *spis; |
| |
| struct vgic_io_device dist_iodev; |
| struct vgic_io_device *redist_iodevs; |
| }; |
| |
| struct vgic_v2_cpu_if { |
| u32 vgic_hcr; |
| u32 vgic_vmcr; |
| u32 vgic_misr; /* Saved only */ |
| u64 vgic_eisr; /* Saved only */ |
| u64 vgic_elrsr; /* Saved only */ |
| u32 vgic_apr; |
| u32 vgic_lr[VGIC_V2_MAX_LRS]; |
| }; |
| |
| struct vgic_v3_cpu_if { |
| #ifdef CONFIG_KVM_ARM_VGIC_V3 |
| u32 vgic_hcr; |
| u32 vgic_vmcr; |
| u32 vgic_sre; /* Restored only, change ignored */ |
| 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 { |
| /* CPU vif control registers for world switch */ |
| union { |
| struct vgic_v2_cpu_if vgic_v2; |
| struct vgic_v3_cpu_if vgic_v3; |
| }; |
| |
| unsigned int used_lrs; |
| struct vgic_irq private_irqs[VGIC_NR_PRIVATE_IRQS]; |
| |
| spinlock_t ap_list_lock; /* Protects the ap_list */ |
| |
| /* |
| * List of IRQs that this VCPU should consider because they are either |
| * Active or Pending (hence the name; AP list), or because they recently |
| * were one of the two and need to be migrated off this list to another |
| * VCPU. |
| */ |
| struct list_head ap_list_head; |
| |
| u64 live_lrs; |
| }; |
| |
| int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write); |
| |
| int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid, |
| bool level); |
| |
| int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu); |
| |
| #define irqchip_in_kernel(k) (!!((k)->arch.vgic.in_kernel)) |
| #define vgic_initialized(k) (false) |
| #define vgic_ready(k) ((k)->arch.vgic.ready) |
| #define vgic_valid_spi(k, i) (((i) >= VGIC_NR_PRIVATE_IRQS) && \ |
| ((i) < (k)->arch.vgic.nr_spis + VGIC_NR_PRIVATE_IRQS)) |
| |
| bool kvm_vcpu_has_pending_irqs(struct kvm_vcpu *vcpu); |
| void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu); |
| void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu); |
| |
| #ifdef CONFIG_KVM_ARM_VGIC_V3 |
| void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg); |
| #else |
| static inline void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg) |
| { |
| } |
| #endif |
| |
| /** |
| * kvm_vgic_get_max_vcpus - Get the maximum number of VCPUs allowed by HW |
| * |
| * The host's GIC naturally limits the maximum amount of VCPUs a guest |
| * can use. |
| */ |
| static inline int kvm_vgic_get_max_vcpus(void) |
| { |
| return kvm_vgic_global_state.max_gic_vcpus; |
| } |
| |
| #endif /* __ASM_ARM_KVM_VGIC_VGIC_H */ |