[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 <linux/types.h>
#include <linux/kvm_types.h>
#include <asm/kvm.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_mmio.h>
#include <asm/fpstate.h>
#include <kvm/arm_arch_timer.h>

#if defined(CONFIG_KVM_ARM_MAX_VCPUS)
#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
#else
#define KVM_MAX_VCPUS 0
#endif

#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 2

#include <kvm/arm_vgic.h>

u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
int __attribute_const__ 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;
	int max_vcpus;
};

#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 */
};

typedef struct vfp_hard_struct kvm_cpu_context_t;

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;

	/* HYP trapping configuration */
	u32 hcr;

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

	/* Exception Information */
	struct kvm_vcpu_fault_info fault;

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

	/* Host FP 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.
	 */

	/* Don't run the guest on this vcpu */
	bool pause;

	/* IO related fields */
	struct kvm_decode mmio_decode;

	/* 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_successful_poll;
	u32 halt_wakeup;
};

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);
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
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 start,
			      unsigned long end)
{
	return 0;
}

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

static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm,
							 unsigned long address)
{
}

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);
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 *);

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

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. The init code doesn't need to preserve these
	 * registers as r0-r3 are already callee saved according to
	 * the AAPCS.
	 * Note that we slightly misuse the prototype by casing the
	 * stack pointer to a void *.
	 *
	 * We don't have enough registers to perform the full init in
	 * one go.  Install the boot PGD first, and then install the
	 * runtime PGD, stack pointer and vectors. The PGDs are always
	 * passed as the third argument, in order to be passed into
	 * r2-r3 to the init code (yes, this is compliant with the
	 * PCS!).
	 */

	kvm_call_hyp(NULL, 0, boot_pgd_ptr);

	kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
}

static inline int kvm_arch_dev_ioctl_check_extension(long ext)
{
	return 0;
}

static inline void vgic_arch_setup(const struct vgic_params *vgic)
{
	BUG_ON(vgic->type != VGIC_V2);
}

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

void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);

struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);

static inline void kvm_arch_hardware_disable(void) {}
static inline void kvm_arch_hardware_unsetup(void) {}
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}

#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
65647300 PB	22	#include <linux/types.h>
65647300 PB	23	#include <linux/kvm_types.h>
749cf76c CD	24	#include <asm/kvm.h>
749cf76c CD	25	#include <asm/kvm_asm.h>
45e96ea6	26	#include <asm/kvm_mmio.h>
f7ed45be	27	#include <asm/fpstate.h>
7275acdf	28	#include <kvm/arm_arch_timer.h>
749cf76c	29
f2dda9d8	30	#if defined(CONFIG_KVM_ARM_MAX_VCPUS)
749cf76c	31	#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
f2dda9d8 GL	32	#else
	33	#define KVM_MAX_VCPUS 0
	34	#endif
	35
2b5e1e47	36	#define KVM_USER_MEM_SLOTS 32
749cf76c CD	37	#define KVM_PRIVATE_MEM_SLOTS 4
749cf76c CD	38	#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
1138245c	39	#define KVM_HAVE_ONE_REG
749cf76c	40
7d0f84aa	41	#define KVM_VCPU_MAX_FEATURES 2
749cf76c	42
7275acdf	43	#include <kvm/arm_vgic.h>
1a89dd91	44
749cf76c	45	u32 kvm_vcpu_reg(struct kvm_vcpu vcpu, u8 reg_num, u32 mode);
6951e48b	46	int __attribute_const__ kvm_target_cpu(void);
749cf76c CD	47	int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
	48	void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
	49
	50	struct kvm_arch {
	51	/* VTTBR value associated with below pgd and vmid */
	52	u64 vttbr;
	53
53e72406 MZ	54	/* Timer */
	55	struct arch_timer_kvm timer;
	56
749cf76c CD	57	/*
	58	* Anything that is not used directly from assembly code goes
	59	* here.
	60	*/
	61
	62	/* The VMID generation used for the virt. memory system */
	63	u64 vmid_gen;
	64	u32 vmid;
	65
	66	/* Stage-2 page table */
	67	pgd_t *pgd;
1a89dd91 MZ	68
	69	/* Interrupt controller */
	70	struct vgic_dist vgic;
3caa2d8c	71	int max_vcpus;
749cf76c CD	72	};
	73
	74	#define KVM_NR_MEM_OBJS 40
	75
	76	/*
	77	* We don't want allocation failures within the mmu code, so we preallocate
	78	* enough memory for a single page fault in a cache.
	79	*/
	80	struct kvm_mmu_memory_cache {
	81	int nobjs;
	82	void *objects[KVM_NR_MEM_OBJS];
	83	};
	84
7393b599 MZ	85	struct kvm_vcpu_fault_info {
	86	u32 hsr; /* Hyp Syndrome Register */
	87	u32 hxfar; /* Hyp Data/Inst. Fault Address Register */
	88	u32 hpfar; /* Hyp IPA Fault Address Register */
	89	u32 hyp_pc; /* PC when exception was taken from Hyp mode */
	90	};
	91
3de50da6	92	typedef struct vfp_hard_struct kvm_cpu_context_t;
9c7a6432	93
749cf76c CD	94	struct kvm_vcpu_arch {
	95	struct kvm_regs regs;
	96
	97	int target; /* Processor target */
	98	DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
	99
	100	/* System control coprocessor (cp15) */
	101	u32 cp15[NR_CP15_REGS];
	102
	103	/* The CPU type we expose to the VM */
	104	u32 midr;
	105
ac30a11e MZ	106	/* HYP trapping configuration */
	107	u32 hcr;
	108
	109	/* Interrupt related fields */
	110	u32 irq_lines; /* IRQ and FIQ levels */
	111
749cf76c	112	/* Exception Information */
7393b599	113	struct kvm_vcpu_fault_info fault;
749cf76c	114
f7ed45be	115	/* Floating point registers (VFP and Advanced SIMD/NEON) */
3de50da6 MZ	116	struct vfp_hard_struct vfp_guest;
	117
	118	/* Host FP context */
	119	kvm_cpu_context_t *host_cpu_context;
f7ed45be	120
1a89dd91 MZ	121	/* VGIC state */
1a89dd91 MZ	122	struct vgic_cpu vgic_cpu;
53e72406	123	struct arch_timer_cpu timer_cpu;
1a89dd91	124
f7ed45be CD	125	/*
	126	* Anything that is not used directly from assembly code goes
	127	* here.
	128	*/
5b3e5e5b	129
aa024c2f MZ	130	/* Don't run the guest on this vcpu */
	131	bool pause;
	132
45e96ea6 CD	133	/* IO related fields */
	134	struct kvm_decode mmio_decode;
	135
749cf76c CD	136	/* Cache some mmu pages needed inside spinlock regions */
749cf76c CD	137	struct kvm_mmu_memory_cache mmu_page_cache;
f7ed45be CD	138
	139	/* Detect first run of a vcpu */
	140	bool has_run_once;
749cf76c CD	141	};
	142
	143	struct kvm_vm_stat {
	144	u32 remote_tlb_flush;
	145	};
	146
	147	struct kvm_vcpu_stat {
f7819512	148	u32 halt_successful_poll;
749cf76c CD	149	u32 halt_wakeup;
	150	};
	151
4a6fee80	152	int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
749cf76c CD	153	unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
749cf76c CD	154	int kvm_arm_copy_reg_indices(struct kvm_vcpu vcpu, u64 __user indices);
749cf76c CD	155	int kvm_arm_get_reg(struct kvm_vcpu vcpu, const struct kvm_one_reg reg);
749cf76c CD	156	int kvm_arm_set_reg(struct kvm_vcpu vcpu, const struct kvm_one_reg reg);
342cd0ab	157	u64 kvm_call_hyp(void *hypfn, ...);
f7ed45be	158	void force_vm_exit(const cpumask_t *mask);
d5d8184d CD	159
d5d8184d CD	160	#define KVM_ARCH_WANT_MMU_NOTIFIER
d5d8184d CD	161	int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
	162	int kvm_unmap_hva_range(struct kvm *kvm,
	163	unsigned long start, unsigned long end);
	164	void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
	165
1138245c CD	166	unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
	167	int kvm_arm_copy_reg_indices(struct kvm_vcpu vcpu, u64 __user indices);
	168
d5d8184d	169	/* We do not have shadow page tables, hence the empty hooks */
57128468 ALC	170	static inline int kvm_age_hva(struct kvm *kvm, unsigned long start,
57128468 ALC	171	unsigned long end)
d5d8184d CD	172	{
	173	return 0;
	174	}
	175
	176	static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
	177	{
	178	return 0;
	179	}
1638a12d	180
fe71557a TC	181	static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm,
	182	unsigned long address)
	183	{
	184	}
	185
1638a12d MZ	186	struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
	187	struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
	188
	189	int kvm_arm_copy_coproc_indices(struct kvm_vcpu vcpu, u64 __user uindices);
	190	unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
1638a12d MZ	191	int kvm_arm_coproc_get_reg(struct kvm_vcpu vcpu, const struct kvm_one_reg );
	192	int kvm_arm_coproc_set_reg(struct kvm_vcpu vcpu, const struct kvm_one_reg );
	193
3414bbff MZ	194	int handle_exit(struct kvm_vcpu vcpu, struct kvm_run run,
	195	int exception_index);
	196
dac288f7 MZ	197	static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
dac288f7 MZ	198	phys_addr_t pgd_ptr,
e7858c58 MZ	199	unsigned long hyp_stack_ptr,
	200	unsigned long vector_ptr)
	201	{
e7858c58	202	/*
5a677ce0 MZ	203	* Call initialization code, and switch to the full blown HYP
	204	* code. The init code doesn't need to preserve these
	205	* registers as r0-r3 are already callee saved according to
	206	* the AAPCS.
	207	* Note that we slightly misuse the prototype by casing the
	208	* stack pointer to a void *.
	209	*
	210	* We don't have enough registers to perform the full init in
	211	* one go. Install the boot PGD first, and then install the
	212	* runtime PGD, stack pointer and vectors. The PGDs are always
	213	* passed as the third argument, in order to be passed into
	214	* r2-r3 to the init code (yes, this is compliant with the
	215	* PCS!).
e7858c58	216	*/
5a677ce0 MZ	217
	218	kvm_call_hyp(NULL, 0, boot_pgd_ptr);
	219
	220	kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
e7858c58 MZ	221	}
e7858c58 MZ	222
17b1e31f MZ	223	static inline int kvm_arch_dev_ioctl_check_extension(long ext)
	224	{
	225	return 0;
	226	}
	227
1a9b1305 MZ	228	static inline void vgic_arch_setup(const struct vgic_params *vgic)
	229	{
	230	BUG_ON(vgic->type != VGIC_V2);
	231	}
	232
210552c1 MZ	233	int kvm_perf_init(void);
	234	int kvm_perf_teardown(void);
	235
c6473555 MS	236	void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
c6473555 MS	237
4429fc64 AP	238	struct kvm_vcpu kvm_mpidr_to_vcpu(struct kvm kvm, unsigned long mpidr);
4429fc64 AP	239
13a34e06	240	static inline void kvm_arch_hardware_disable(void) {}
0865e636 RK	241	static inline void kvm_arch_hardware_unsetup(void) {}
	242	static inline void kvm_arch_sync_events(struct kvm *kvm) {}
	243	static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
	244	static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
	245
749cf76c	246	#endif /* __ARM_KVM_HOST_H__ */