[mirror_ubuntu-artful-kernel.git] / include / kvm / arm_vgic.h

/*
 * Copyright (C) 2012 ARM Ltd.
 * Author: Marc Zyngier <marc.zyngier@arm.com>
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef __ASM_ARM_KVM_VGIC_H
#define __ASM_ARM_KVM_VGIC_H

#include <linux/kernel.h>
#include <linux/kvm.h>
#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
#define VGIC_NR_PPIS		16
#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)

/* Sanity checks... */
#if (VGIC_MAX_CPUS > 8)
#error	Invalid number of CPU interfaces
#endif

#if (VGIC_NR_IRQS & 31)
#error "VGIC_NR_IRQS must be a multiple of 32"
#endif

#if (VGIC_NR_IRQS > 1024)
#error "VGIC_NR_IRQS must be <= 1024"
#endif

/*
 * The GIC distributor registers describing interrupts have two parts:
 * - 32 per-CPU interrupts (SGI + PPI)
 * - a bunch of shared interrupts (SPI)
 */
struct vgic_bitmap {
	union {
		u32 reg[VGIC_NR_PRIVATE_IRQS / 32];
		DECLARE_BITMAP(reg_ul, VGIC_NR_PRIVATE_IRQS);
	} percpu[VGIC_MAX_CPUS];
	union {
		u32 reg[VGIC_NR_SHARED_IRQS / 32];
		DECLARE_BITMAP(reg_ul, VGIC_NR_SHARED_IRQS);
	} shared;
};

struct vgic_bytemap {
	u32 percpu[VGIC_MAX_CPUS][VGIC_NR_PRIVATE_IRQS / 4];
	u32 shared[VGIC_NR_SHARED_IRQS  / 4];
};

struct vgic_dist {
#ifdef CONFIG_KVM_ARM_VGIC
	spinlock_t		lock;
	bool			ready;

	/* Virtual control interface mapping */
	void __iomem		*vctrl_base;

	/* Distributor and vcpu interface mapping in the guest */
	phys_addr_t		vgic_dist_base;
	phys_addr_t		vgic_cpu_base;

	/* Distributor enabled */
	u32			enabled;

	/* Interrupt enabled (one bit per IRQ) */
	struct vgic_bitmap	irq_enabled;

	/* Interrupt 'pin' level */
	struct vgic_bitmap	irq_state;

	/* Level-triggered interrupt in progress */
	struct vgic_bitmap	irq_active;

	/* Interrupt priority. Not used yet. */
	struct vgic_bytemap	irq_priority;

	/* Level/edge triggered */
	struct vgic_bitmap	irq_cfg;

	/* Source CPU per SGI and target CPU */
	u8			irq_sgi_sources[VGIC_MAX_CPUS][VGIC_NR_SGIS];

	/* Target CPU for each IRQ */
	u8			irq_spi_cpu[VGIC_NR_SHARED_IRQS];
	struct vgic_bitmap	irq_spi_target[VGIC_MAX_CPUS];

	/* Bitmap indicating which CPU has something pending */
	unsigned long		irq_pending_on_cpu;
#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_MAX_LRS];
};

struct vgic_cpu {
#ifdef CONFIG_KVM_ARM_VGIC
	/* per IRQ to LR mapping */
	u8		vgic_irq_lr_map[VGIC_NR_IRQS];

	/* Pending interrupts on this VCPU */
	DECLARE_BITMAP(	pending_percpu, VGIC_NR_PRIVATE_IRQS);
	DECLARE_BITMAP(	pending_shared, VGIC_NR_SHARED_IRQS);

	/* Bitmap of used/free list registers */
	DECLARE_BITMAP(	lr_used, VGIC_MAX_LRS);

	/* Number of list registers on this CPU */
	int		nr_lr;

	/* CPU vif control registers for world switch */
	union {
		struct vgic_v2_cpu_if	vgic_v2;
	};
#endif
};

#define LR_EMPTY	0xff

struct kvm;
struct kvm_vcpu;
struct kvm_run;
struct kvm_exit_mmio;

#ifdef CONFIG_KVM_ARM_VGIC
int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write);
int kvm_vgic_hyp_init(void);
int kvm_vgic_init(struct kvm *kvm);
int kvm_vgic_create(struct kvm *kvm);
int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu);
void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu);
void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu);
int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int irq_num,
			bool level);
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 vgic_initialized(k)	((k)->arch.vgic.ready)

#else
static inline int kvm_vgic_hyp_init(void)
{
	return 0;
}

static inline int kvm_vgic_set_addr(struct kvm *kvm, unsigned long type, u64 addr)
{
	return 0;
}

static inline int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
{
	return -ENXIO;
}

static inline int kvm_vgic_init(struct kvm *kvm)
{
	return 0;
}

static inline int kvm_vgic_create(struct kvm *kvm)
{
	return 0;
}

static inline int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu)
{
	return 0;
}

static inline void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu) {}
static inline void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu) {}

static inline int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid,
				      unsigned int irq_num, bool level)
{
	return 0;
}

static inline int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu)
{
	return 0;
}

static inline bool vgic_handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run,
				    struct kvm_exit_mmio *mmio)
{
	return false;
}

static inline int irqchip_in_kernel(struct kvm *kvm)
{
	return 0;
}

static inline bool vgic_initialized(struct kvm *kvm)
{
	return true;
}
#endif

#endif
Commit	Line	Data
1a89dd91 MZ	1	/*
	2	* Copyright (C) 2012 ARM Ltd.
	3	* Author: Marc Zyngier <marc.zyngier@arm.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License version 2 as
	7	* published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	17	*/
	18
	19	#ifndef __ASM_ARM_KVM_VGIC_H
	20	#define __ASM_ARM_KVM_VGIC_H
	21
b47ef92a MZ	22	#include <linux/kernel.h>
b47ef92a MZ	23	#include <linux/kvm.h>
b47ef92a MZ	24	#include <linux/irqreturn.h>
	25	#include <linux/spinlock.h>
	26	#include <linux/types.h>
1a89dd91 MZ	27	#include <linux/irqchip/arm-gic.h>
1a89dd91 MZ	28
9b2d2e0d	29	#define VGIC_NR_IRQS 256
b47ef92a MZ	30	#define VGIC_NR_SGIS 16
	31	#define VGIC_NR_PPIS 16
	32	#define VGIC_NR_PRIVATE_IRQS (VGIC_NR_SGIS + VGIC_NR_PPIS)
	33	#define VGIC_NR_SHARED_IRQS (VGIC_NR_IRQS - VGIC_NR_PRIVATE_IRQS)
	34	#define VGIC_MAX_CPUS KVM_MAX_VCPUS
9d949dce	35	#define VGIC_MAX_LRS (1 << 6)
b47ef92a MZ	36
	37	/* Sanity checks... */
	38	#if (VGIC_MAX_CPUS > 8)
	39	#error Invalid number of CPU interfaces
	40	#endif
	41
	42	#if (VGIC_NR_IRQS & 31)
	43	#error "VGIC_NR_IRQS must be a multiple of 32"
	44	#endif
	45
	46	#if (VGIC_NR_IRQS > 1024)
	47	#error "VGIC_NR_IRQS must be <= 1024"
	48	#endif
	49
	50	/*
	51	* The GIC distributor registers describing interrupts have two parts:
	52	* - 32 per-CPU interrupts (SGI + PPI)
	53	* - a bunch of shared interrupts (SPI)
	54	*/
	55	struct vgic_bitmap {
	56	union {
	57	u32 reg[VGIC_NR_PRIVATE_IRQS / 32];
	58	DECLARE_BITMAP(reg_ul, VGIC_NR_PRIVATE_IRQS);
	59	} percpu[VGIC_MAX_CPUS];
	60	union {
	61	u32 reg[VGIC_NR_SHARED_IRQS / 32];
	62	DECLARE_BITMAP(reg_ul, VGIC_NR_SHARED_IRQS);
	63	} shared;
	64	};
	65
	66	struct vgic_bytemap {
	67	u32 percpu[VGIC_MAX_CPUS][VGIC_NR_PRIVATE_IRQS / 4];
	68	u32 shared[VGIC_NR_SHARED_IRQS / 4];
	69	};
	70
1a89dd91	71	struct vgic_dist {
b47ef92a MZ	72	#ifdef CONFIG_KVM_ARM_VGIC
b47ef92a MZ	73	spinlock_t lock;
01ac5e34	74	bool ready;
b47ef92a MZ	75
	76	/* Virtual control interface mapping */
	77	void __iomem *vctrl_base;
	78
330690cd CD	79	/* Distributor and vcpu interface mapping in the guest */
	80	phys_addr_t vgic_dist_base;
	81	phys_addr_t vgic_cpu_base;
b47ef92a MZ	82
	83	/* Distributor enabled */
	84	u32 enabled;
	85
	86	/* Interrupt enabled (one bit per IRQ) */
	87	struct vgic_bitmap irq_enabled;
	88
	89	/* Interrupt 'pin' level */
	90	struct vgic_bitmap irq_state;
	91
	92	/* Level-triggered interrupt in progress */
	93	struct vgic_bitmap irq_active;
	94
	95	/* Interrupt priority. Not used yet. */
	96	struct vgic_bytemap irq_priority;
	97
	98	/* Level/edge triggered */
	99	struct vgic_bitmap irq_cfg;
	100
	101	/* Source CPU per SGI and target CPU */
	102	u8 irq_sgi_sources[VGIC_MAX_CPUS][VGIC_NR_SGIS];
	103
	104	/* Target CPU for each IRQ */
	105	u8 irq_spi_cpu[VGIC_NR_SHARED_IRQS];
	106	struct vgic_bitmap irq_spi_target[VGIC_MAX_CPUS];
	107
	108	/* Bitmap indicating which CPU has something pending */
	109	unsigned long irq_pending_on_cpu;
	110	#endif
1a89dd91 MZ	111	};
1a89dd91 MZ	112
eede821d MZ	113	struct vgic_v2_cpu_if {
	114	u32 vgic_hcr;
	115	u32 vgic_vmcr;
	116	u32 vgic_misr; /* Saved only */
	117	u32 vgic_eisr[2]; /* Saved only */
	118	u32 vgic_elrsr[2]; /* Saved only */
	119	u32 vgic_apr;
	120	u32 vgic_lr[VGIC_MAX_LRS];
	121	};
	122
1a89dd91	123	struct vgic_cpu {
9d949dce MZ	124	#ifdef CONFIG_KVM_ARM_VGIC
	125	/* per IRQ to LR mapping */
	126	u8 vgic_irq_lr_map[VGIC_NR_IRQS];
	127
	128	/* Pending interrupts on this VCPU */
	129	DECLARE_BITMAP( pending_percpu, VGIC_NR_PRIVATE_IRQS);
	130	DECLARE_BITMAP( pending_shared, VGIC_NR_SHARED_IRQS);
	131
	132	/* Bitmap of used/free list registers */
	133	DECLARE_BITMAP( lr_used, VGIC_MAX_LRS);
	134
	135	/* Number of list registers on this CPU */
	136	int nr_lr;
	137
	138	/* CPU vif control registers for world switch */
eede821d MZ	139	union {
	140	struct vgic_v2_cpu_if vgic_v2;
	141	};
9d949dce	142	#endif
1a89dd91 MZ	143	};
1a89dd91 MZ	144
9d949dce MZ	145	#define LR_EMPTY 0xff
9d949dce MZ	146
1a89dd91 MZ	147	struct kvm;
	148	struct kvm_vcpu;
	149	struct kvm_run;
	150	struct kvm_exit_mmio;
	151
	152	#ifdef CONFIG_KVM_ARM_VGIC
ce01e4e8	153	int kvm_vgic_addr(struct kvm kvm, unsigned long type, u64 addr, bool write);
01ac5e34 MZ	154	int kvm_vgic_hyp_init(void);
	155	int kvm_vgic_init(struct kvm *kvm);
	156	int kvm_vgic_create(struct kvm *kvm);
	157	int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu);
9d949dce MZ	158	void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu);
9d949dce MZ	159	void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu);
5863c2ce MZ	160	int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int irq_num,
5863c2ce MZ	161	bool level);
9d949dce	162	int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu);
1a89dd91 MZ	163	bool vgic_handle_mmio(struct kvm_vcpu vcpu, struct kvm_run run,
	164	struct kvm_exit_mmio *mmio);
	165
9d949dce	166	#define irqchip_in_kernel(k) (!!((k)->arch.vgic.vctrl_base))
01ac5e34	167	#define vgic_initialized(k) ((k)->arch.vgic.ready)
9d949dce	168
1a89dd91 MZ	169	#else
	170	static inline int kvm_vgic_hyp_init(void)
	171	{
	172	return 0;
	173	}
	174
330690cd CD	175	static inline int kvm_vgic_set_addr(struct kvm *kvm, unsigned long type, u64 addr)
	176	{
	177	return 0;
	178	}
	179
6cbde825 MZ	180	static inline int kvm_vgic_addr(struct kvm kvm, unsigned long type, u64 addr, bool write)
	181	{
	182	return -ENXIO;
	183	}
	184
1a89dd91 MZ	185	static inline int kvm_vgic_init(struct kvm *kvm)
	186	{
	187	return 0;
	188	}
	189
	190	static inline int kvm_vgic_create(struct kvm *kvm)
	191	{
	192	return 0;
	193	}
	194
	195	static inline int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu)
	196	{
	197	return 0;
	198	}
	199
	200	static inline void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu) {}
	201	static inline void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu) {}
	202
5863c2ce MZ	203	static inline int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid,
	204	unsigned int irq_num, bool level)
	205	{
	206	return 0;
	207	}
	208
1a89dd91 MZ	209	static inline int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu)
	210	{
	211	return 0;
	212	}
	213
	214	static inline bool vgic_handle_mmio(struct kvm_vcpu vcpu, struct kvm_run run,
	215	struct kvm_exit_mmio *mmio)
	216	{
	217	return false;
	218	}
	219
	220	static inline int irqchip_in_kernel(struct kvm *kvm)
	221	{
	222	return 0;
	223	}
01ac5e34 MZ	224
	225	static inline bool vgic_initialized(struct kvm *kvm)
	226	{
	227	return true;
	228	}
1a89dd91 MZ	229	#endif
	230
	231	#endif