arch/arm64/kvm/vgic/vgic.h - third_party/linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) 2015, 2016 ARM Ltd.
  */
 #ifndef __KVM_ARM_VGIC_NEW_H__
 #define __KVM_ARM_VGIC_NEW_H__

 #include <linux/irqchip/arm-gic-common.h>
 #include <asm/kvm_mmu.h>

 #define PRODUCT_ID_KVM		0x4b	/* ASCII code K */
 #define IMPLEMENTER_ARM		0x43b

 #define VGIC_ADDR_UNDEF		(-1)
 #define IS_VGIC_ADDR_UNDEF(_x)  ((_x) == VGIC_ADDR_UNDEF)

 #define INTERRUPT_ID_BITS_SPIS	10
 #define INTERRUPT_ID_BITS_ITS	16
 #define VGIC_PRI_BITS		5

 #define vgic_irq_is_sgi(intid) ((intid) < VGIC_NR_SGIS)

 #define VGIC_AFFINITY_0_SHIFT 0
 #define VGIC_AFFINITY_0_MASK (0xffUL << VGIC_AFFINITY_0_SHIFT)
 #define VGIC_AFFINITY_1_SHIFT 8
 #define VGIC_AFFINITY_1_MASK (0xffUL << VGIC_AFFINITY_1_SHIFT)
 #define VGIC_AFFINITY_2_SHIFT 16
 #define VGIC_AFFINITY_2_MASK (0xffUL << VGIC_AFFINITY_2_SHIFT)
 #define VGIC_AFFINITY_3_SHIFT 24
 #define VGIC_AFFINITY_3_MASK (0xffUL << VGIC_AFFINITY_3_SHIFT)

 #define VGIC_AFFINITY_LEVEL(reg, level) \
 	((((reg) & VGIC_AFFINITY_## level ##_MASK) \
 	>> VGIC_AFFINITY_## level ##_SHIFT) << MPIDR_LEVEL_SHIFT(level))

 /*
  * The Userspace encodes the affinity differently from the MPIDR,
  * Below macro converts vgic userspace format to MPIDR reg format.
  */
 #define VGIC_TO_MPIDR(val) (VGIC_AFFINITY_LEVEL(val, 0) | \
 			    VGIC_AFFINITY_LEVEL(val, 1) | \
 			    VGIC_AFFINITY_LEVEL(val, 2) | \
 			    VGIC_AFFINITY_LEVEL(val, 3))

 /*
  * As per Documentation/virt/kvm/devices/arm-vgic-v3.rst,
  * below macros are defined for CPUREG encoding.
  */
 #define KVM_REG_ARM_VGIC_SYSREG_OP0_MASK   0x000000000000c000
 #define KVM_REG_ARM_VGIC_SYSREG_OP0_SHIFT  14
 #define KVM_REG_ARM_VGIC_SYSREG_OP1_MASK   0x0000000000003800
 #define KVM_REG_ARM_VGIC_SYSREG_OP1_SHIFT  11
 #define KVM_REG_ARM_VGIC_SYSREG_CRN_MASK   0x0000000000000780
 #define KVM_REG_ARM_VGIC_SYSREG_CRN_SHIFT  7
 #define KVM_REG_ARM_VGIC_SYSREG_CRM_MASK   0x0000000000000078
 #define KVM_REG_ARM_VGIC_SYSREG_CRM_SHIFT  3
 #define KVM_REG_ARM_VGIC_SYSREG_OP2_MASK   0x0000000000000007
 #define KVM_REG_ARM_VGIC_SYSREG_OP2_SHIFT  0

 #define KVM_DEV_ARM_VGIC_SYSREG_MASK (KVM_REG_ARM_VGIC_SYSREG_OP0_MASK | \
 				      KVM_REG_ARM_VGIC_SYSREG_OP1_MASK | \
 				      KVM_REG_ARM_VGIC_SYSREG_CRN_MASK | \
 				      KVM_REG_ARM_VGIC_SYSREG_CRM_MASK | \
 				      KVM_REG_ARM_VGIC_SYSREG_OP2_MASK)

 /*
  * As per Documentation/virt/kvm/devices/arm-vgic-its.rst,
  * below macros are defined for ITS table entry encoding.
  */
 #define KVM_ITS_CTE_VALID_SHIFT		63
 #define KVM_ITS_CTE_VALID_MASK		BIT_ULL(63)
 #define KVM_ITS_CTE_RDBASE_SHIFT	16
 #define KVM_ITS_CTE_ICID_MASK		GENMASK_ULL(15, 0)
 #define KVM_ITS_ITE_NEXT_SHIFT		48
 #define KVM_ITS_ITE_PINTID_SHIFT	16
 #define KVM_ITS_ITE_PINTID_MASK		GENMASK_ULL(47, 16)
 #define KVM_ITS_ITE_ICID_MASK		GENMASK_ULL(15, 0)
 #define KVM_ITS_DTE_VALID_SHIFT		63
 #define KVM_ITS_DTE_VALID_MASK		BIT_ULL(63)
 #define KVM_ITS_DTE_NEXT_SHIFT		49
 #define KVM_ITS_DTE_NEXT_MASK		GENMASK_ULL(62, 49)
 #define KVM_ITS_DTE_ITTADDR_SHIFT	5
 #define KVM_ITS_DTE_ITTADDR_MASK	GENMASK_ULL(48, 5)
 #define KVM_ITS_DTE_SIZE_MASK		GENMASK_ULL(4, 0)
 #define KVM_ITS_L1E_VALID_MASK		BIT_ULL(63)
 /* we only support 64 kB translation table page size */
 #define KVM_ITS_L1E_ADDR_MASK		GENMASK_ULL(51, 16)

 #define KVM_VGIC_V3_RDIST_INDEX_MASK	GENMASK_ULL(11, 0)
 #define KVM_VGIC_V3_RDIST_FLAGS_MASK	GENMASK_ULL(15, 12)
 #define KVM_VGIC_V3_RDIST_FLAGS_SHIFT	12
 #define KVM_VGIC_V3_RDIST_BASE_MASK	GENMASK_ULL(51, 16)
 #define KVM_VGIC_V3_RDIST_COUNT_MASK	GENMASK_ULL(63, 52)
 #define KVM_VGIC_V3_RDIST_COUNT_SHIFT	52

 #ifdef CONFIG_DEBUG_SPINLOCK
 #define DEBUG_SPINLOCK_BUG_ON(p) BUG_ON(p)
 #else
 #define DEBUG_SPINLOCK_BUG_ON(p)
 #endif

 static inline u32 vgic_get_implementation_rev(struct kvm_vcpu *vcpu)
 {
 	return vcpu->kvm->arch.vgic.implementation_rev;
 }

 /* Requires the irq_lock to be held by the caller. */
 static inline bool irq_is_pending(struct vgic_irq *irq)
 {
 	if (irq->config == VGIC_CONFIG_EDGE)
 		return irq->pending_latch;
 	else
 		return irq->pending_latch || irq->line_level;
 }

 static inline bool vgic_irq_is_mapped_level(struct vgic_irq *irq)
 {
 	return irq->config == VGIC_CONFIG_LEVEL && irq->hw;
 }

 static inline int vgic_irq_get_lr_count(struct vgic_irq *irq)
 {
 	/* Account for the active state as an interrupt */
 	if (vgic_irq_is_sgi(irq->intid) && irq->source)
 		return hweight8(irq->source) + irq->active;

 	return irq_is_pending(irq) || irq->active;
 }

 static inline bool vgic_irq_is_multi_sgi(struct vgic_irq *irq)
 {
 	return vgic_irq_get_lr_count(irq) > 1;
 }

 static inline int vgic_write_guest_lock(struct kvm *kvm, gpa_t gpa,
 					const void *data, unsigned long len)
 {
 	struct vgic_dist *dist = &kvm->arch.vgic;
 	int ret;

 	dist->table_write_in_progress = true;
 	ret = kvm_write_guest_lock(kvm, gpa, data, len);
 	dist->table_write_in_progress = false;

 	return ret;
 }

 /*
  * This struct provides an intermediate representation of the fields contained
  * in the GICH_VMCR and ICH_VMCR registers, such that code exporting the GIC
  * state to userspace can generate either GICv2 or GICv3 CPU interface
  * registers regardless of the hardware backed GIC used.
  */
 struct vgic_vmcr {
 	u32	grpen0;
 	u32	grpen1;

 	u32	ackctl;
 	u32	fiqen;
 	u32	cbpr;
 	u32	eoim;

 	u32	abpr;
 	u32	bpr;
 	u32	pmr;  /* Priority mask field in the GICC_PMR and
 		       * ICC_PMR_EL1 priority field format */
 };

 struct vgic_reg_attr {
 	struct kvm_vcpu *vcpu;
 	gpa_t addr;
 };

 int vgic_v3_parse_attr(struct kvm_device *dev, struct kvm_device_attr *attr,
 		       struct vgic_reg_attr *reg_attr);
 int vgic_v2_parse_attr(struct kvm_device *dev, struct kvm_device_attr *attr,
 		       struct vgic_reg_attr *reg_attr);
 const struct vgic_register_region *
 vgic_get_mmio_region(struct kvm_vcpu *vcpu, struct vgic_io_device *iodev,
 		     gpa_t addr, int len);
 struct vgic_irq *vgic_get_irq(struct kvm *kvm, struct kvm_vcpu *vcpu,
 			      u32 intid);
 void __vgic_put_lpi_locked(struct kvm *kvm, struct vgic_irq *irq);
 void vgic_put_irq(struct kvm *kvm, struct vgic_irq *irq);
 bool vgic_get_phys_line_level(struct vgic_irq *irq);
 void vgic_irq_set_phys_pending(struct vgic_irq *irq, bool pending);
 void vgic_irq_set_phys_active(struct vgic_irq *irq, bool active);
 bool vgic_queue_irq_unlock(struct kvm *kvm, struct vgic_irq *irq,
 			   unsigned long flags);
 void vgic_kick_vcpus(struct kvm *kvm);
 void vgic_irq_handle_resampling(struct vgic_irq *irq,
 				bool lr_deactivated, bool lr_pending);

 int vgic_check_iorange(struct kvm *kvm, phys_addr_t ioaddr,
 		       phys_addr_t addr, phys_addr_t alignment,
 		       phys_addr_t size);

 void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu);
 void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
 void vgic_v2_clear_lr(struct kvm_vcpu *vcpu, int lr);
 void vgic_v2_set_underflow(struct kvm_vcpu *vcpu);
 int vgic_v2_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr);
 int vgic_v2_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
 			 int offset, u32 *val);
 int vgic_v2_cpuif_uaccess(struct kvm_vcpu *vcpu, bool is_write,
 			  int offset, u32 *val);
 void vgic_v2_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
 void vgic_v2_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
 void vgic_v2_enable(struct kvm_vcpu *vcpu);
 int vgic_v2_probe(const struct gic_kvm_info *info);
 int vgic_v2_map_resources(struct kvm *kvm);
 int vgic_register_dist_iodev(struct kvm *kvm, gpa_t dist_base_address,
 			     enum vgic_type);

 void vgic_v2_init_lrs(void);
 void vgic_v2_load(struct kvm_vcpu *vcpu);
 void vgic_v2_put(struct kvm_vcpu *vcpu);
 void vgic_v2_vmcr_sync(struct kvm_vcpu *vcpu);

 void vgic_v2_save_state(struct kvm_vcpu *vcpu);
 void vgic_v2_restore_state(struct kvm_vcpu *vcpu);

 static inline void vgic_get_irq_kref(struct vgic_irq *irq)
 {
 	if (irq->intid < VGIC_MIN_LPI)
 		return;

 	kref_get(&irq->refcount);
 }

 void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu);
 void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
 void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr);
 void vgic_v3_set_underflow(struct kvm_vcpu *vcpu);
 void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
 void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
 void vgic_v3_enable(struct kvm_vcpu *vcpu);
 int vgic_v3_probe(const struct gic_kvm_info *info);
 int vgic_v3_map_resources(struct kvm *kvm);
 int vgic_v3_lpi_sync_pending_status(struct kvm *kvm, struct vgic_irq *irq);
 int vgic_v3_save_pending_tables(struct kvm *kvm);
 int vgic_v3_set_redist_base(struct kvm *kvm, u32 index, u64 addr, u32 count);
 int vgic_register_redist_iodev(struct kvm_vcpu *vcpu);
 void vgic_unregister_redist_iodev(struct kvm_vcpu *vcpu);
 bool vgic_v3_check_base(struct kvm *kvm);

 void vgic_v3_load(struct kvm_vcpu *vcpu);
 void vgic_v3_put(struct kvm_vcpu *vcpu);
 void vgic_v3_vmcr_sync(struct kvm_vcpu *vcpu);

 bool vgic_has_its(struct kvm *kvm);
 int kvm_vgic_register_its_device(void);
 void vgic_enable_lpis(struct kvm_vcpu *vcpu);
 void vgic_flush_pending_lpis(struct kvm_vcpu *vcpu);
 int vgic_its_inject_msi(struct kvm *kvm, struct kvm_msi *msi);
 int vgic_v3_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr);
 int vgic_v3_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
 			 int offset, u32 *val);
 int vgic_v3_redist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
 			 int offset, u32 *val);
 int vgic_v3_cpu_sysregs_uaccess(struct kvm_vcpu *vcpu,
 				struct kvm_device_attr *attr, bool is_write);
 int vgic_v3_has_cpu_sysregs_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
 int vgic_v3_line_level_info_uaccess(struct kvm_vcpu *vcpu, bool is_write,
 				    u32 intid, u32 *val);
 int kvm_register_vgic_device(unsigned long type);
 void vgic_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
 void vgic_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
 int vgic_lazy_init(struct kvm *kvm);
 int vgic_init(struct kvm *kvm);

 void vgic_debug_init(struct kvm *kvm);
 void vgic_debug_destroy(struct kvm *kvm);

 static inline int vgic_v3_max_apr_idx(struct kvm_vcpu *vcpu)
 {
 	struct vgic_cpu *cpu_if = &vcpu->arch.vgic_cpu;

 	/*
 	 * num_pri_bits are initialized with HW supported values.
 	 * We can rely safely on num_pri_bits even if VM has not
 	 * restored ICC_CTLR_EL1 before restoring APnR registers.
 	 */
 	switch (cpu_if->num_pri_bits) {
 	case 7: return 3;
 	case 6: return 1;
 	default: return 0;
 	}
 }

 static inline bool
 vgic_v3_redist_region_full(struct vgic_redist_region *region)
 {
 	if (!region->count)
 		return false;

 	return (region->free_index >= region->count);
 }

 struct vgic_redist_region *vgic_v3_rdist_free_slot(struct list_head *rdregs);

 static inline size_t
 vgic_v3_rd_region_size(struct kvm *kvm, struct vgic_redist_region *rdreg)
 {
 	if (!rdreg->count)
 		return atomic_read(&kvm->online_vcpus) * KVM_VGIC_V3_REDIST_SIZE;
 	else
 		return rdreg->count * KVM_VGIC_V3_REDIST_SIZE;
 }

 struct vgic_redist_region *vgic_v3_rdist_region_from_index(struct kvm *kvm,
 							   u32 index);
 void vgic_v3_free_redist_region(struct vgic_redist_region *rdreg);

 bool vgic_v3_rdist_overlap(struct kvm *kvm, gpa_t base, size_t size);

 static inline bool vgic_dist_overlap(struct kvm *kvm, gpa_t base, size_t size)
 {
 	struct vgic_dist *d = &kvm->arch.vgic;

 	return (base + size > d->vgic_dist_base) &&
 		(base < d->vgic_dist_base + KVM_VGIC_V3_DIST_SIZE);
 }

 bool vgic_lpis_enabled(struct kvm_vcpu *vcpu);
 int vgic_copy_lpi_list(struct kvm *kvm, struct kvm_vcpu *vcpu, u32 **intid_ptr);
 int vgic_its_resolve_lpi(struct kvm *kvm, struct vgic_its *its,
 			 u32 devid, u32 eventid, struct vgic_irq **irq);
 struct vgic_its *vgic_msi_to_its(struct kvm *kvm, struct kvm_msi *msi);
 int vgic_its_inject_cached_translation(struct kvm *kvm, struct kvm_msi *msi);
 void vgic_lpi_translation_cache_init(struct kvm *kvm);
 void vgic_lpi_translation_cache_destroy(struct kvm *kvm);
 void vgic_its_invalidate_cache(struct kvm *kvm);

 /* GICv4.1 MMIO interface */
 int vgic_its_inv_lpi(struct kvm *kvm, struct vgic_irq *irq);
 int vgic_its_invall(struct kvm_vcpu *vcpu);

 bool vgic_supports_direct_msis(struct kvm *kvm);
 int vgic_v4_init(struct kvm *kvm);
 void vgic_v4_teardown(struct kvm *kvm);
 void vgic_v4_configure_vsgis(struct kvm *kvm);
 void vgic_v4_get_vlpi_state(struct vgic_irq *irq, bool *val);
 int vgic_v4_request_vpe_irq(struct kvm_vcpu *vcpu, int irq);

 #endif
	/* SPDX-License-Identifier: GPL-2.0-only */
	/*
	* Copyright (C) 2015, 2016 ARM Ltd.
	*/
	#ifndef __KVM_ARM_VGIC_NEW_H__
	#define __KVM_ARM_VGIC_NEW_H__

	#include <linux/irqchip/arm-gic-common.h>
	#include <asm/kvm_mmu.h>

	#define PRODUCT_ID_KVM 0x4b /* ASCII code K */
	#define IMPLEMENTER_ARM 0x43b

	#define VGIC_ADDR_UNDEF (-1)
	#define IS_VGIC_ADDR_UNDEF(_x) ((_x) == VGIC_ADDR_UNDEF)

	#define INTERRUPT_ID_BITS_SPIS 10
	#define INTERRUPT_ID_BITS_ITS 16
	#define VGIC_PRI_BITS 5

	#define vgic_irq_is_sgi(intid) ((intid) < VGIC_NR_SGIS)

	#define VGIC_AFFINITY_0_SHIFT 0
	#define VGIC_AFFINITY_0_MASK (0xffUL << VGIC_AFFINITY_0_SHIFT)
	#define VGIC_AFFINITY_1_SHIFT 8
	#define VGIC_AFFINITY_1_MASK (0xffUL << VGIC_AFFINITY_1_SHIFT)
	#define VGIC_AFFINITY_2_SHIFT 16
	#define VGIC_AFFINITY_2_MASK (0xffUL << VGIC_AFFINITY_2_SHIFT)
	#define VGIC_AFFINITY_3_SHIFT 24
	#define VGIC_AFFINITY_3_MASK (0xffUL << VGIC_AFFINITY_3_SHIFT)

	#define VGIC_AFFINITY_LEVEL(reg, level) \
	((((reg) & VGIC_AFFINITY_## level ##_MASK) \
	>> VGIC_AFFINITY_## level ##_SHIFT) << MPIDR_LEVEL_SHIFT(level))

	/*
	* The Userspace encodes the affinity differently from the MPIDR,
	* Below macro converts vgic userspace format to MPIDR reg format.
	*/
	#define VGIC_TO_MPIDR(val) (VGIC_AFFINITY_LEVEL(val, 0) \| \
	VGIC_AFFINITY_LEVEL(val, 1) \| \
	VGIC_AFFINITY_LEVEL(val, 2) \| \
	VGIC_AFFINITY_LEVEL(val, 3))

	/*
	* As per Documentation/virt/kvm/devices/arm-vgic-v3.rst,
	* below macros are defined for CPUREG encoding.
	*/
	#define KVM_REG_ARM_VGIC_SYSREG_OP0_MASK 0x000000000000c000
	#define KVM_REG_ARM_VGIC_SYSREG_OP0_SHIFT 14
	#define KVM_REG_ARM_VGIC_SYSREG_OP1_MASK 0x0000000000003800
	#define KVM_REG_ARM_VGIC_SYSREG_OP1_SHIFT 11
	#define KVM_REG_ARM_VGIC_SYSREG_CRN_MASK 0x0000000000000780
	#define KVM_REG_ARM_VGIC_SYSREG_CRN_SHIFT 7
	#define KVM_REG_ARM_VGIC_SYSREG_CRM_MASK 0x0000000000000078
	#define KVM_REG_ARM_VGIC_SYSREG_CRM_SHIFT 3
	#define KVM_REG_ARM_VGIC_SYSREG_OP2_MASK 0x0000000000000007
	#define KVM_REG_ARM_VGIC_SYSREG_OP2_SHIFT 0

	#define KVM_DEV_ARM_VGIC_SYSREG_MASK (KVM_REG_ARM_VGIC_SYSREG_OP0_MASK \| \
	KVM_REG_ARM_VGIC_SYSREG_OP1_MASK \| \
	KVM_REG_ARM_VGIC_SYSREG_CRN_MASK \| \
	KVM_REG_ARM_VGIC_SYSREG_CRM_MASK \| \
	KVM_REG_ARM_VGIC_SYSREG_OP2_MASK)

	/*
	* As per Documentation/virt/kvm/devices/arm-vgic-its.rst,
	* below macros are defined for ITS table entry encoding.
	*/
	#define KVM_ITS_CTE_VALID_SHIFT 63
	#define KVM_ITS_CTE_VALID_MASK BIT_ULL(63)
	#define KVM_ITS_CTE_RDBASE_SHIFT 16
	#define KVM_ITS_CTE_ICID_MASK GENMASK_ULL(15, 0)
	#define KVM_ITS_ITE_NEXT_SHIFT 48
	#define KVM_ITS_ITE_PINTID_SHIFT 16
	#define KVM_ITS_ITE_PINTID_MASK GENMASK_ULL(47, 16)
	#define KVM_ITS_ITE_ICID_MASK GENMASK_ULL(15, 0)
	#define KVM_ITS_DTE_VALID_SHIFT 63
	#define KVM_ITS_DTE_VALID_MASK BIT_ULL(63)
	#define KVM_ITS_DTE_NEXT_SHIFT 49
	#define KVM_ITS_DTE_NEXT_MASK GENMASK_ULL(62, 49)
	#define KVM_ITS_DTE_ITTADDR_SHIFT 5
	#define KVM_ITS_DTE_ITTADDR_MASK GENMASK_ULL(48, 5)
	#define KVM_ITS_DTE_SIZE_MASK GENMASK_ULL(4, 0)
	#define KVM_ITS_L1E_VALID_MASK BIT_ULL(63)
	/* we only support 64 kB translation table page size */
	#define KVM_ITS_L1E_ADDR_MASK GENMASK_ULL(51, 16)

	#define KVM_VGIC_V3_RDIST_INDEX_MASK GENMASK_ULL(11, 0)
	#define KVM_VGIC_V3_RDIST_FLAGS_MASK GENMASK_ULL(15, 12)
	#define KVM_VGIC_V3_RDIST_FLAGS_SHIFT 12
	#define KVM_VGIC_V3_RDIST_BASE_MASK GENMASK_ULL(51, 16)
	#define KVM_VGIC_V3_RDIST_COUNT_MASK GENMASK_ULL(63, 52)
	#define KVM_VGIC_V3_RDIST_COUNT_SHIFT 52

	#ifdef CONFIG_DEBUG_SPINLOCK
	#define DEBUG_SPINLOCK_BUG_ON(p) BUG_ON(p)
	#else
	#define DEBUG_SPINLOCK_BUG_ON(p)
	#endif

	static inline u32 vgic_get_implementation_rev(struct kvm_vcpu *vcpu)
	{
	return vcpu->kvm->arch.vgic.implementation_rev;
	}

	/* Requires the irq_lock to be held by the caller. */
	static inline bool irq_is_pending(struct vgic_irq *irq)
	{
	if (irq->config == VGIC_CONFIG_EDGE)
	return irq->pending_latch;
	else
	return irq->pending_latch \|\| irq->line_level;
	}

	static inline bool vgic_irq_is_mapped_level(struct vgic_irq *irq)
	{
	return irq->config == VGIC_CONFIG_LEVEL && irq->hw;
	}

	static inline int vgic_irq_get_lr_count(struct vgic_irq *irq)
	{
	/* Account for the active state as an interrupt */
	if (vgic_irq_is_sgi(irq->intid) && irq->source)
	return hweight8(irq->source) + irq->active;

	return irq_is_pending(irq) \|\| irq->active;
	}

	static inline bool vgic_irq_is_multi_sgi(struct vgic_irq *irq)
	{
	return vgic_irq_get_lr_count(irq) > 1;
	}

	static inline int vgic_write_guest_lock(struct kvm *kvm, gpa_t gpa,
	const void *data, unsigned long len)
	{
	struct vgic_dist *dist = &kvm->arch.vgic;
	int ret;

	dist->table_write_in_progress = true;
	ret = kvm_write_guest_lock(kvm, gpa, data, len);
	dist->table_write_in_progress = false;

	return ret;
	}

	/*
	* This struct provides an intermediate representation of the fields contained
	* in the GICH_VMCR and ICH_VMCR registers, such that code exporting the GIC
	* state to userspace can generate either GICv2 or GICv3 CPU interface
	* registers regardless of the hardware backed GIC used.
	*/
	struct vgic_vmcr {
	u32 grpen0;
	u32 grpen1;

	u32 ackctl;
	u32 fiqen;
	u32 cbpr;
	u32 eoim;

	u32 abpr;
	u32 bpr;
	u32 pmr; /* Priority mask field in the GICC_PMR and
	* ICC_PMR_EL1 priority field format */
	};

	struct vgic_reg_attr {
	struct kvm_vcpu *vcpu;
	gpa_t addr;
	};

	int vgic_v3_parse_attr(struct kvm_device dev, struct kvm_device_attr attr,
	struct vgic_reg_attr *reg_attr);
	int vgic_v2_parse_attr(struct kvm_device dev, struct kvm_device_attr attr,
	struct vgic_reg_attr *reg_attr);
	const struct vgic_register_region *
	vgic_get_mmio_region(struct kvm_vcpu vcpu, struct vgic_io_device iodev,
	gpa_t addr, int len);
	struct vgic_irq vgic_get_irq(struct kvm kvm, struct kvm_vcpu *vcpu,
	u32 intid);
	void __vgic_put_lpi_locked(struct kvm kvm, struct vgic_irq irq);
	void vgic_put_irq(struct kvm kvm, struct vgic_irq irq);
	bool vgic_get_phys_line_level(struct vgic_irq *irq);
	void vgic_irq_set_phys_pending(struct vgic_irq *irq, bool pending);
	void vgic_irq_set_phys_active(struct vgic_irq *irq, bool active);
	bool vgic_queue_irq_unlock(struct kvm kvm, struct vgic_irq irq,
	unsigned long flags);
	void vgic_kick_vcpus(struct kvm *kvm);
	void vgic_irq_handle_resampling(struct vgic_irq *irq,
	bool lr_deactivated, bool lr_pending);

	int vgic_check_iorange(struct kvm *kvm, phys_addr_t ioaddr,
	phys_addr_t addr, phys_addr_t alignment,
	phys_addr_t size);

	void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu);
	void vgic_v2_populate_lr(struct kvm_vcpu vcpu, struct vgic_irq irq, int lr);
	void vgic_v2_clear_lr(struct kvm_vcpu *vcpu, int lr);
	void vgic_v2_set_underflow(struct kvm_vcpu *vcpu);
	int vgic_v2_has_attr_regs(struct kvm_device dev, struct kvm_device_attr attr);
	int vgic_v2_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
	int offset, u32 *val);
	int vgic_v2_cpuif_uaccess(struct kvm_vcpu *vcpu, bool is_write,
	int offset, u32 *val);
	void vgic_v2_set_vmcr(struct kvm_vcpu vcpu, struct vgic_vmcr vmcr);
	void vgic_v2_get_vmcr(struct kvm_vcpu vcpu, struct vgic_vmcr vmcr);
	void vgic_v2_enable(struct kvm_vcpu *vcpu);
	int vgic_v2_probe(const struct gic_kvm_info *info);
	int vgic_v2_map_resources(struct kvm *kvm);
	int vgic_register_dist_iodev(struct kvm *kvm, gpa_t dist_base_address,
	enum vgic_type);

	void vgic_v2_init_lrs(void);
	void vgic_v2_load(struct kvm_vcpu *vcpu);
	void vgic_v2_put(struct kvm_vcpu *vcpu);
	void vgic_v2_vmcr_sync(struct kvm_vcpu *vcpu);

	void vgic_v2_save_state(struct kvm_vcpu *vcpu);
	void vgic_v2_restore_state(struct kvm_vcpu *vcpu);

	static inline void vgic_get_irq_kref(struct vgic_irq *irq)
	{
	if (irq->intid < VGIC_MIN_LPI)
	return;

	kref_get(&irq->refcount);
	}

	void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu);
	void vgic_v3_populate_lr(struct kvm_vcpu vcpu, struct vgic_irq irq, int lr);
	void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr);
	void vgic_v3_set_underflow(struct kvm_vcpu *vcpu);
	void vgic_v3_set_vmcr(struct kvm_vcpu vcpu, struct vgic_vmcr vmcr);
	void vgic_v3_get_vmcr(struct kvm_vcpu vcpu, struct vgic_vmcr vmcr);
	void vgic_v3_enable(struct kvm_vcpu *vcpu);
	int vgic_v3_probe(const struct gic_kvm_info *info);
	int vgic_v3_map_resources(struct kvm *kvm);
	int vgic_v3_lpi_sync_pending_status(struct kvm kvm, struct vgic_irq irq);
	int vgic_v3_save_pending_tables(struct kvm *kvm);
	int vgic_v3_set_redist_base(struct kvm *kvm, u32 index, u64 addr, u32 count);
	int vgic_register_redist_iodev(struct kvm_vcpu *vcpu);
	void vgic_unregister_redist_iodev(struct kvm_vcpu *vcpu);
	bool vgic_v3_check_base(struct kvm *kvm);

	void vgic_v3_load(struct kvm_vcpu *vcpu);
	void vgic_v3_put(struct kvm_vcpu *vcpu);
	void vgic_v3_vmcr_sync(struct kvm_vcpu *vcpu);

	bool vgic_has_its(struct kvm *kvm);
	int kvm_vgic_register_its_device(void);
	void vgic_enable_lpis(struct kvm_vcpu *vcpu);
	void vgic_flush_pending_lpis(struct kvm_vcpu *vcpu);
	int vgic_its_inject_msi(struct kvm kvm, struct kvm_msi msi);
	int vgic_v3_has_attr_regs(struct kvm_device dev, struct kvm_device_attr attr);
	int vgic_v3_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
	int offset, u32 *val);
	int vgic_v3_redist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
	int offset, u32 *val);
	int vgic_v3_cpu_sysregs_uaccess(struct kvm_vcpu *vcpu,
	struct kvm_device_attr *attr, bool is_write);
	int vgic_v3_has_cpu_sysregs_attr(struct kvm_vcpu vcpu, struct kvm_device_attr attr);
	int vgic_v3_line_level_info_uaccess(struct kvm_vcpu *vcpu, bool is_write,
	u32 intid, u32 *val);
	int kvm_register_vgic_device(unsigned long type);
	void vgic_set_vmcr(struct kvm_vcpu vcpu, struct vgic_vmcr vmcr);
	void vgic_get_vmcr(struct kvm_vcpu vcpu, struct vgic_vmcr vmcr);
	int vgic_lazy_init(struct kvm *kvm);
	int vgic_init(struct kvm *kvm);

	void vgic_debug_init(struct kvm *kvm);
	void vgic_debug_destroy(struct kvm *kvm);

	static inline int vgic_v3_max_apr_idx(struct kvm_vcpu *vcpu)
	{
	struct vgic_cpu *cpu_if = &vcpu->arch.vgic_cpu;

	/*
	* num_pri_bits are initialized with HW supported values.
	* We can rely safely on num_pri_bits even if VM has not
	* restored ICC_CTLR_EL1 before restoring APnR registers.
	*/
	switch (cpu_if->num_pri_bits) {
	case 7: return 3;
	case 6: return 1;
	default: return 0;
	}
	}

	static inline bool
	vgic_v3_redist_region_full(struct vgic_redist_region *region)
	{
	if (!region->count)
	return false;

	return (region->free_index >= region->count);
	}

	struct vgic_redist_region vgic_v3_rdist_free_slot(struct list_head rdregs);

	static inline size_t
	vgic_v3_rd_region_size(struct kvm kvm, struct vgic_redist_region rdreg)
	{
	if (!rdreg->count)
	return atomic_read(&kvm->online_vcpus) * KVM_VGIC_V3_REDIST_SIZE;
	else
	return rdreg->count * KVM_VGIC_V3_REDIST_SIZE;
	}

	struct vgic_redist_region vgic_v3_rdist_region_from_index(struct kvm kvm,
	u32 index);
	void vgic_v3_free_redist_region(struct vgic_redist_region *rdreg);

	bool vgic_v3_rdist_overlap(struct kvm *kvm, gpa_t base, size_t size);

	static inline bool vgic_dist_overlap(struct kvm *kvm, gpa_t base, size_t size)
	{
	struct vgic_dist *d = &kvm->arch.vgic;

	return (base + size > d->vgic_dist_base) &&
	(base < d->vgic_dist_base + KVM_VGIC_V3_DIST_SIZE);
	}

	bool vgic_lpis_enabled(struct kvm_vcpu *vcpu);
	int vgic_copy_lpi_list(struct kvm kvm, struct kvm_vcpu vcpu, u32 **intid_ptr);
	int vgic_its_resolve_lpi(struct kvm kvm, struct vgic_its its,
	u32 devid, u32 eventid, struct vgic_irq **irq);
	struct vgic_its vgic_msi_to_its(struct kvm kvm, struct kvm_msi *msi);
	int vgic_its_inject_cached_translation(struct kvm kvm, struct kvm_msi msi);
	void vgic_lpi_translation_cache_init(struct kvm *kvm);
	void vgic_lpi_translation_cache_destroy(struct kvm *kvm);
	void vgic_its_invalidate_cache(struct kvm *kvm);

	/* GICv4.1 MMIO interface */
	int vgic_its_inv_lpi(struct kvm kvm, struct vgic_irq irq);
	int vgic_its_invall(struct kvm_vcpu *vcpu);

	bool vgic_supports_direct_msis(struct kvm *kvm);
	int vgic_v4_init(struct kvm *kvm);
	void vgic_v4_teardown(struct kvm *kvm);
	void vgic_v4_configure_vsgis(struct kvm *kvm);
	void vgic_v4_get_vlpi_state(struct vgic_irq irq, bool val);
	int vgic_v4_request_vpe_irq(struct kvm_vcpu *vcpu, int irq);

	#endif