[deliverable/linux.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 <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 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 <kvm/arm_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 */
};

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;

	/* 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.
	 */
	/* 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 *);

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;
}

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

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