[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/fpstate.h>

#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
#define KVM_MEMORY_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 0

/* 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)

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;

	/*
	 * 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;
};

#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_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 */
	u32 hsr;		/* Hyp Syndrome Register */
	u32 hxfar;		/* Hyp Data/Inst Fault Address Register */
	u32 hpfar;		/* Hyp IPA Fault Address Register */

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

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

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

	/* Hyp exception information */
	u32 hyp_pc;		/* PC when exception was taken from Hyp mode */

	/* 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;
}
#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>
f7ed45be	24	#include <asm/fpstate.h>
749cf76c CD	25
	26	#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
	27	#define KVM_MEMORY_SLOTS 32
	28	#define KVM_PRIVATE_MEM_SLOTS 4
	29	#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
1138245c	30	#define KVM_HAVE_ONE_REG
749cf76c CD	31
	32	#define KVM_VCPU_MAX_FEATURES 0
	33
	34	/* We don't currently support large pages. */
	35	#define KVM_HPAGE_GFN_SHIFT(x) 0
	36	#define KVM_NR_PAGE_SIZES 1
	37	#define KVM_PAGES_PER_HPAGE(x) (1UL<<31)
	38
	39	struct kvm_vcpu;
	40	u32 kvm_vcpu_reg(struct kvm_vcpu vcpu, u8 reg_num, u32 mode);
	41	int kvm_target_cpu(void);
	42	int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
	43	void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
	44
	45	struct kvm_arch {
	46	/* VTTBR value associated with below pgd and vmid */
	47	u64 vttbr;
	48
	49	/*
	50	* Anything that is not used directly from assembly code goes
	51	* here.
	52	*/
	53
	54	/* The VMID generation used for the virt. memory system */
	55	u64 vmid_gen;
	56	u32 vmid;
	57
	58	/* Stage-2 page table */
	59	pgd_t *pgd;
	60	};
	61
	62	#define KVM_NR_MEM_OBJS 40
	63
	64	/*
	65	* We don't want allocation failures within the mmu code, so we preallocate
	66	* enough memory for a single page fault in a cache.
	67	*/
	68	struct kvm_mmu_memory_cache {
	69	int nobjs;
	70	void *objects[KVM_NR_MEM_OBJS];
	71	};
	72
	73	struct kvm_vcpu_arch {
	74	struct kvm_regs regs;
	75
	76	int target; /* Processor target */
	77	DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
	78
	79	/* System control coprocessor (cp15) */
	80	u32 cp15[NR_CP15_REGS];
	81
	82	/* The CPU type we expose to the VM */
	83	u32 midr;
	84
	85	/* Exception Information */
	86	u32 hsr; /* Hyp Syndrome Register */
	87	u32 hxfar; /* Hyp Data/Inst Fault Address Register */
	88	u32 hpfar; /* Hyp IPA Fault Address Register */
	89
f7ed45be CD	90	/* Floating point registers (VFP and Advanced SIMD/NEON) */
	91	struct vfp_hard_struct vfp_guest;
	92	struct vfp_hard_struct *vfp_host;
	93
	94	/*
	95	* Anything that is not used directly from assembly code goes
	96	* here.
	97	*/
5b3e5e5b CD	98	/* dcache set/way operation pending */
	99	int last_pcpu;
	100	cpumask_t require_dcache_flush;
	101
749cf76c CD	102	/* Interrupt related fields */
	103	u32 irq_lines; /* IRQ and FIQ levels */
	104
	105	/* Hyp exception information */
	106	u32 hyp_pc; /* PC when exception was taken from Hyp mode */
	107
	108	/* Cache some mmu pages needed inside spinlock regions */
	109	struct kvm_mmu_memory_cache mmu_page_cache;
f7ed45be CD	110
	111	/* Detect first run of a vcpu */
	112	bool has_run_once;
749cf76c CD	113	};
	114
	115	struct kvm_vm_stat {
	116	u32 remote_tlb_flush;
	117	};
	118
	119	struct kvm_vcpu_stat {
	120	u32 halt_wakeup;
	121	};
	122
	123	struct kvm_vcpu_init;
	124	int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
	125	const struct kvm_vcpu_init *init);
	126	unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
	127	int kvm_arm_copy_reg_indices(struct kvm_vcpu vcpu, u64 __user indices);
	128	struct kvm_one_reg;
	129	int kvm_arm_get_reg(struct kvm_vcpu vcpu, const struct kvm_one_reg reg);
	130	int kvm_arm_set_reg(struct kvm_vcpu vcpu, const struct kvm_one_reg reg);
342cd0ab	131	u64 kvm_call_hyp(void *hypfn, ...);
f7ed45be	132	void force_vm_exit(const cpumask_t *mask);
d5d8184d CD	133
	134	#define KVM_ARCH_WANT_MMU_NOTIFIER
	135	struct kvm;
	136	int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
	137	int kvm_unmap_hva_range(struct kvm *kvm,
	138	unsigned long start, unsigned long end);
	139	void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
	140
1138245c CD	141	unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
	142	int kvm_arm_copy_reg_indices(struct kvm_vcpu vcpu, u64 __user indices);
	143
d5d8184d CD	144	/* We do not have shadow page tables, hence the empty hooks */
	145	static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva)
	146	{
	147	return 0;
	148	}
	149
	150	static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
	151	{
	152	return 0;
	153	}
749cf76c	154	#endif /* __ARM_KVM_HOST_H__ */