[deliverable/linux.git] / arch / arm64 / include / asm / kvm_host.h

/*
 * Copyright (C) 2012,2013 - ARM Ltd
 * Author: Marc Zyngier <marc.zyngier@arm.com>
 *
 * Derived from arch/arm/include/asm/kvm_host.h:
 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
 * Author: Christoffer Dall <c.dall@virtualopensystems.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, see <http://www.gnu.org/licenses/>.
 */

#ifndef __ARM64_KVM_HOST_H__
#define __ARM64_KVM_HOST_H__

#include <asm/kvm.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_mmio.h>

#define KVM_MAX_VCPUS 4
#define KVM_USER_MEM_SLOTS 32
#define KVM_PRIVATE_MEM_SLOTS 4
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1

#include <kvm/arm_vgic.h>
#include <kvm/arm_arch_timer.h>

#define KVM_VCPU_MAX_FEATURES 2

struct kvm_vcpu;
int kvm_target_cpu(void);
int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
int kvm_arch_dev_ioctl_check_extension(long ext);

struct kvm_arch {
	/* The VMID generation used for the virt. memory system */
	u64    vmid_gen;
	u32    vmid;

	/* 1-level 2nd stage table and lock */
	spinlock_t pgd_lock;
	pgd_t *pgd;

	/* VTTBR value associated with above pgd and vmid */
	u64    vttbr;

	/* Interrupt controller */
	struct vgic_dist	vgic;

	/* Timer */
	struct arch_timer_kvm	timer;
};

#define KVM_NR_MEM_OBJS     40

/*
 * We don't want allocation failures within the mmu code, so we preallocate
 * enough memory for a single page fault in a cache.
 */
struct kvm_mmu_memory_cache {
	int nobjs;
	void *objects[KVM_NR_MEM_OBJS];
};

struct kvm_vcpu_fault_info {
	u32 esr_el2;		/* Hyp Syndrom Register */
	u64 far_el2;		/* Hyp Fault Address Register */
	u64 hpfar_el2;		/* Hyp IPA Fault Address Register */
};

struct kvm_cpu_context {
	struct kvm_regs	gp_regs;
	union {
		u64 sys_regs[NR_SYS_REGS];
		u32 cp15[NR_CP15_REGS];
	};
};

typedef struct kvm_cpu_context kvm_cpu_context_t;

struct kvm_vcpu_arch {
	struct kvm_cpu_context ctxt;

	/* HYP configuration */
	u64 hcr_el2;

	/* Exception Information */
	struct kvm_vcpu_fault_info fault;

	/* Pointer to host CPU context */
	kvm_cpu_context_t *host_cpu_context;

	/* VGIC state */
	struct vgic_cpu vgic_cpu;
	struct arch_timer_cpu timer_cpu;

	/*
	 * Anything that is not used directly from assembly code goes
	 * here.
	 */
	/* dcache set/way operation pending */
	int last_pcpu;
	cpumask_t require_dcache_flush;

	/* Don't run the guest */
	bool pause;

	/* IO related fields */
	struct kvm_decode mmio_decode;

	/* Interrupt related fields */
	u64 irq_lines;		/* IRQ and FIQ levels */

	/* Cache some mmu pages needed inside spinlock regions */
	struct kvm_mmu_memory_cache mmu_page_cache;

	/* Target CPU and feature flags */
	int target;
	DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);

	/* Detect first run of a vcpu */
	bool has_run_once;
};

#define vcpu_gp_regs(v)		(&(v)->arch.ctxt.gp_regs)
#define vcpu_sys_reg(v,r)	((v)->arch.ctxt.sys_regs[(r)])
#define vcpu_cp15(v,r)		((v)->arch.ctxt.cp15[(r)])

struct kvm_vm_stat {
	u32 remote_tlb_flush;
};

struct kvm_vcpu_stat {
	u32 halt_wakeup;
};

struct kvm_vcpu_init;
int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
			const struct kvm_vcpu_init *init);
int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
struct kvm_one_reg;
int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);

#define KVM_ARCH_WANT_MMU_NOTIFIER
struct kvm;
int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
int kvm_unmap_hva_range(struct kvm *kvm,
			unsigned long start, unsigned long end);
void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);

/* We do not have shadow page tables, hence the empty hooks */
static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva)
{
	return 0;
}

static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
{
	return 0;
}

struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);

u64 kvm_call_hyp(void *hypfn, ...);

int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
		int exception_index);

int kvm_perf_init(void);
int kvm_perf_teardown(void);

static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
				       phys_addr_t pgd_ptr,
				       unsigned long hyp_stack_ptr,
				       unsigned long vector_ptr)
{
	/*
	 * Call initialization code, and switch to the full blown
	 * HYP code.
	 */
	kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr,
		     hyp_stack_ptr, vector_ptr);
}

#endif /* __ARM64_KVM_HOST_H__ */
Commit	Line	Data
4f8d6632 MZ	1	/*
	2	* Copyright (C) 2012,2013 - ARM Ltd
	3	* Author: Marc Zyngier <marc.zyngier@arm.com>
	4	*
	5	* Derived from arch/arm/include/asm/kvm_host.h:
	6	* Copyright (C) 2012 - Virtual Open Systems and Columbia University
	7	* Author: Christoffer Dall <c.dall@virtualopensystems.com>
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	20	*/
	21
	22	#ifndef __ARM64_KVM_HOST_H__
	23	#define __ARM64_KVM_HOST_H__
	24
	25	#include <asm/kvm.h>
	26	#include <asm/kvm_asm.h>
	27	#include <asm/kvm_mmio.h>
	28
	29	#define KVM_MAX_VCPUS 4
	30	#define KVM_USER_MEM_SLOTS 32
	31	#define KVM_PRIVATE_MEM_SLOTS 4
	32	#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
	33
	34	#include <kvm/arm_vgic.h>
	35	#include <kvm/arm_arch_timer.h>
	36
0d854a60	37	#define KVM_VCPU_MAX_FEATURES 2
4f8d6632	38
4f8d6632 MZ	39	struct kvm_vcpu;
	40	int kvm_target_cpu(void);
	41	int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
	42	int kvm_arch_dev_ioctl_check_extension(long ext);
	43
	44	struct kvm_arch {
	45	/* The VMID generation used for the virt. memory system */
	46	u64 vmid_gen;
	47	u32 vmid;
	48
	49	/* 1-level 2nd stage table and lock */
	50	spinlock_t pgd_lock;
	51	pgd_t *pgd;
	52
	53	/* VTTBR value associated with above pgd and vmid */
	54	u64 vttbr;
	55
	56	/* Interrupt controller */
	57	struct vgic_dist vgic;
	58
	59	/* Timer */
	60	struct arch_timer_kvm timer;
	61	};
	62
	63	#define KVM_NR_MEM_OBJS 40
	64
	65	/*
	66	* We don't want allocation failures within the mmu code, so we preallocate
	67	* enough memory for a single page fault in a cache.
	68	*/
	69	struct kvm_mmu_memory_cache {
	70	int nobjs;
	71	void *objects[KVM_NR_MEM_OBJS];
	72	};
	73
	74	struct kvm_vcpu_fault_info {
	75	u32 esr_el2; /* Hyp Syndrom Register */
	76	u64 far_el2; /* Hyp Fault Address Register */
	77	u64 hpfar_el2; /* Hyp IPA Fault Address Register */
	78	};
	79
	80	struct kvm_cpu_context {
	81	struct kvm_regs gp_regs;
40033a61 MZ	82	union {
	83	u64 sys_regs[NR_SYS_REGS];
	84	u32 cp15[NR_CP15_REGS];
	85	};
4f8d6632 MZ	86	};
	87
	88	typedef struct kvm_cpu_context kvm_cpu_context_t;
	89
	90	struct kvm_vcpu_arch {
	91	struct kvm_cpu_context ctxt;
	92
	93	/* HYP configuration */
	94	u64 hcr_el2;
	95
	96	/* Exception Information */
	97	struct kvm_vcpu_fault_info fault;
	98
	99	/* Pointer to host CPU context */
	100	kvm_cpu_context_t *host_cpu_context;
	101
	102	/* VGIC state */
	103	struct vgic_cpu vgic_cpu;
	104	struct arch_timer_cpu timer_cpu;
	105
	106	/*
	107	* Anything that is not used directly from assembly code goes
	108	* here.
	109	*/
	110	/* dcache set/way operation pending */
	111	int last_pcpu;
	112	cpumask_t require_dcache_flush;
	113
	114	/* Don't run the guest */
	115	bool pause;
	116
	117	/* IO related fields */
	118	struct kvm_decode mmio_decode;
	119
	120	/* Interrupt related fields */
	121	u64 irq_lines; /* IRQ and FIQ levels */
	122
	123	/* Cache some mmu pages needed inside spinlock regions */
	124	struct kvm_mmu_memory_cache mmu_page_cache;
	125
	126	/* Target CPU and feature flags */
6c8c0c4d	127	int target;
4f8d6632 MZ	128	DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
	129
	130	/* Detect first run of a vcpu */
	131	bool has_run_once;
	132	};
	133
	134	#define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs)
	135	#define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)])
	136	#define vcpu_cp15(v,r) ((v)->arch.ctxt.cp15[(r)])
	137
	138	struct kvm_vm_stat {
	139	u32 remote_tlb_flush;
	140	};
	141
	142	struct kvm_vcpu_stat {
	143	u32 halt_wakeup;
	144	};
	145
	146	struct kvm_vcpu_init;
	147	int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
	148	const struct kvm_vcpu_init *init);
473bdc0e	149	int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
4f8d6632 MZ	150	unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
	151	int kvm_arm_copy_reg_indices(struct kvm_vcpu vcpu, u64 __user indices);
	152	struct kvm_one_reg;
	153	int kvm_arm_get_reg(struct kvm_vcpu vcpu, const struct kvm_one_reg reg);
	154	int kvm_arm_set_reg(struct kvm_vcpu vcpu, const struct kvm_one_reg reg);
	155
	156	#define KVM_ARCH_WANT_MMU_NOTIFIER
	157	struct kvm;
	158	int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
	159	int kvm_unmap_hva_range(struct kvm *kvm,
	160	unsigned long start, unsigned long end);
	161	void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
	162
	163	/* We do not have shadow page tables, hence the empty hooks */
	164	static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva)
	165	{
	166	return 0;
	167	}
	168
	169	static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
	170	{
	171	return 0;
	172	}
	173
	174	struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
	175	struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
	176
	177	u64 kvm_call_hyp(void *hypfn, ...);
	178
	179	int handle_exit(struct kvm_vcpu vcpu, struct kvm_run run,
	180	int exception_index);
	181
	182	int kvm_perf_init(void);
	183	int kvm_perf_teardown(void);
	184
092bd143 MZ	185	static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
	186	phys_addr_t pgd_ptr,
	187	unsigned long hyp_stack_ptr,
	188	unsigned long vector_ptr)
	189	{
	190	/*
	191	* Call initialization code, and switch to the full blown
	192	* HYP code.
	193	*/
	194	kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr,
	195	hyp_stack_ptr, vector_ptr);
	196	}
	197
4f8d6632	198	#endif /* __ARM64_KVM_HOST_H__ */