[mirror_ubuntu-artful-kernel.git] / 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, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#ifndef __ARM_KVM_HOST_H__
#define __ARM_KVM_HOST_H__

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

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

#define KVM_VCPU_MAX_FEATURES 1

/* We don't currently support large pages. */
#define KVM_HPAGE_GFN_SHIFT(x)	0
#define KVM_NR_PAGE_SIZES	1
#define KVM_PAGES_PER_HPAGE(x)	(1UL<<31)

#include <asm/kvm_vgic.h>

struct kvm_vcpu;
u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
int kvm_target_cpu(void);
int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
void kvm_reset_coprocs(struct kvm_vcpu *vcpu);

struct kvm_arch {
	/* VTTBR value associated with below pgd and vmid */
	u64    vttbr;

	/* Timer */
	struct arch_timer_kvm	timer;

	/*
	 * Anything that is not used directly from assembly code goes
	 * here.
	 */

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

	/* Stage-2 page table */
	pgd_t *pgd;

	/* Interrupt controller */
	struct vgic_dist	vgic;
};

#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 hsr;		/* Hyp Syndrome Register */
	u32 hxfar;		/* Hyp Data/Inst. Fault Address Register */
	u32 hpfar;		/* Hyp IPA Fault Address Register */
	u32 hyp_pc;		/* PC when exception was taken from Hyp mode */
};

struct kvm_vcpu_arch {
	struct kvm_regs regs;

	int target; /* Processor target */
	DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);

	/* System control coprocessor (cp15) */
	u32 cp15[NR_CP15_REGS];

	/* The CPU type we expose to the VM */
	u32 midr;

	/* Exception Information */
	struct kvm_vcpu_fault_info fault;

	/* Floating point registers (VFP and Advanced SIMD/NEON) */
	struct vfp_hard_struct vfp_guest;
	struct vfp_hard_struct *vfp_host;

	/* 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 on this vcpu */
	bool pause;

	/* IO related fields */
	struct kvm_decode mmio_decode;

	/* Interrupt related fields */
	u32 irq_lines;		/* IRQ and FIQ levels */

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

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

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);
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);
u64 kvm_call_hyp(void *hypfn, ...);
void force_vm_exit(const cpumask_t *mask);

#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);

unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);

/* 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);

int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
struct kvm_one_reg;
int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);

#endif /* __ARM_KVM_HOST_H__ */
Commit	Line	Data
749cf76c CD	1	/*
	2	* Copyright (C) 2012 - Virtual Open Systems and Columbia University
	3	* Author: Christoffer Dall <c.dall@virtualopensystems.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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	17	*/
	18
	19	#ifndef __ARM_KVM_HOST_H__
	20	#define __ARM_KVM_HOST_H__
	21
	22	#include <asm/kvm.h>
	23	#include <asm/kvm_asm.h>
45e96ea6	24	#include <asm/kvm_mmio.h>
f7ed45be	25	#include <asm/fpstate.h>
53e72406	26	#include <asm/kvm_arch_timer.h>
749cf76c CD	27
749cf76c CD	28	#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
2b5e1e47	29	#define KVM_USER_MEM_SLOTS 32
749cf76c CD	30	#define KVM_PRIVATE_MEM_SLOTS 4
749cf76c CD	31	#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
1138245c	32	#define KVM_HAVE_ONE_REG
749cf76c	33
aa024c2f	34	#define KVM_VCPU_MAX_FEATURES 1
749cf76c CD	35
	36	/* We don't currently support large pages. */
	37	#define KVM_HPAGE_GFN_SHIFT(x) 0
	38	#define KVM_NR_PAGE_SIZES 1
	39	#define KVM_PAGES_PER_HPAGE(x) (1UL<<31)
	40
1a89dd91 MZ	41	#include <asm/kvm_vgic.h>
1a89dd91 MZ	42
749cf76c CD	43	struct kvm_vcpu;
	44	u32 kvm_vcpu_reg(struct kvm_vcpu vcpu, u8 reg_num, u32 mode);
	45	int kvm_target_cpu(void);
	46	int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
	47	void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
	48
	49	struct kvm_arch {
	50	/* VTTBR value associated with below pgd and vmid */
	51	u64 vttbr;
	52
53e72406 MZ	53	/* Timer */
	54	struct arch_timer_kvm timer;
	55
749cf76c CD	56	/*
	57	* Anything that is not used directly from assembly code goes
	58	* here.
	59	*/
	60
	61	/* The VMID generation used for the virt. memory system */
	62	u64 vmid_gen;
	63	u32 vmid;
	64
	65	/* Stage-2 page table */
	66	pgd_t *pgd;
1a89dd91 MZ	67
	68	/* Interrupt controller */
	69	struct vgic_dist vgic;
749cf76c CD	70	};
	71
	72	#define KVM_NR_MEM_OBJS 40
	73
	74	/*
	75	* We don't want allocation failures within the mmu code, so we preallocate
	76	* enough memory for a single page fault in a cache.
	77	*/
	78	struct kvm_mmu_memory_cache {
	79	int nobjs;
	80	void *objects[KVM_NR_MEM_OBJS];
	81	};
	82
7393b599 MZ	83	struct kvm_vcpu_fault_info {
	84	u32 hsr; /* Hyp Syndrome Register */
	85	u32 hxfar; /* Hyp Data/Inst. Fault Address Register */
	86	u32 hpfar; /* Hyp IPA Fault Address Register */
	87	u32 hyp_pc; /* PC when exception was taken from Hyp mode */
	88	};
	89
749cf76c CD	90	struct kvm_vcpu_arch {
	91	struct kvm_regs regs;
	92
	93	int target; /* Processor target */
	94	DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
	95
	96	/* System control coprocessor (cp15) */
	97	u32 cp15[NR_CP15_REGS];
	98
	99	/* The CPU type we expose to the VM */
	100	u32 midr;
	101
	102	/* Exception Information */
7393b599	103	struct kvm_vcpu_fault_info fault;
749cf76c	104
f7ed45be CD	105	/* Floating point registers (VFP and Advanced SIMD/NEON) */
	106	struct vfp_hard_struct vfp_guest;
	107	struct vfp_hard_struct *vfp_host;
	108
1a89dd91 MZ	109	/* VGIC state */
1a89dd91 MZ	110	struct vgic_cpu vgic_cpu;
53e72406	111	struct arch_timer_cpu timer_cpu;
1a89dd91	112
f7ed45be CD	113	/*
	114	* Anything that is not used directly from assembly code goes
	115	* here.
	116	*/
5b3e5e5b CD	117	/* dcache set/way operation pending */
	118	int last_pcpu;
	119	cpumask_t require_dcache_flush;
	120
aa024c2f MZ	121	/* Don't run the guest on this vcpu */
	122	bool pause;
	123
45e96ea6 CD	124	/* IO related fields */
	125	struct kvm_decode mmio_decode;
	126
749cf76c CD	127	/* Interrupt related fields */
	128	u32 irq_lines; /* IRQ and FIQ levels */
	129
749cf76c CD	130	/* Cache some mmu pages needed inside spinlock regions */
749cf76c CD	131	struct kvm_mmu_memory_cache mmu_page_cache;
f7ed45be CD	132
	133	/* Detect first run of a vcpu */
	134	bool has_run_once;
749cf76c CD	135	};
	136
	137	struct kvm_vm_stat {
	138	u32 remote_tlb_flush;
	139	};
	140
	141	struct kvm_vcpu_stat {
	142	u32 halt_wakeup;
	143	};
	144
	145	struct kvm_vcpu_init;
	146	int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
	147	const struct kvm_vcpu_init *init);
	148	unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
	149	int kvm_arm_copy_reg_indices(struct kvm_vcpu vcpu, u64 __user indices);
	150	struct kvm_one_reg;
	151	int kvm_arm_get_reg(struct kvm_vcpu vcpu, const struct kvm_one_reg reg);
	152	int kvm_arm_set_reg(struct kvm_vcpu vcpu, const struct kvm_one_reg reg);
342cd0ab	153	u64 kvm_call_hyp(void *hypfn, ...);
f7ed45be	154	void force_vm_exit(const cpumask_t *mask);
d5d8184d CD	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
1138245c CD	163	unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
	164	int kvm_arm_copy_reg_indices(struct kvm_vcpu vcpu, u64 __user indices);
	165
d5d8184d CD	166	/* We do not have shadow page tables, hence the empty hooks */
	167	static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva)
	168	{
	169	return 0;
	170	}
	171
	172	static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
	173	{
	174	return 0;
	175	}
1638a12d MZ	176
	177	struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
	178	struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
	179
	180	int kvm_arm_copy_coproc_indices(struct kvm_vcpu vcpu, u64 __user uindices);
	181	unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
	182	struct kvm_one_reg;
	183	int kvm_arm_coproc_get_reg(struct kvm_vcpu vcpu, const struct kvm_one_reg );
	184	int kvm_arm_coproc_set_reg(struct kvm_vcpu vcpu, const struct kvm_one_reg );
	185
749cf76c	186	#endif /* __ARM_KVM_HOST_H__ */