[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>

#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 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)

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;

	/* 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 */

	/* 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>
45e96ea6	24	#include <asm/kvm_mmio.h>
f7ed45be	25	#include <asm/fpstate.h>
749cf76c CD	26
	27	#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
	28	#define KVM_MEMORY_SLOTS 32
	29	#define KVM_PRIVATE_MEM_SLOTS 4
	30	#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
1138245c	31	#define KVM_HAVE_ONE_REG
749cf76c	32
aa024c2f	33	#define KVM_VCPU_MAX_FEATURES 1
749cf76c CD	34
	35	/* We don't currently support large pages. */
	36	#define KVM_HPAGE_GFN_SHIFT(x) 0
	37	#define KVM_NR_PAGE_SIZES 1
	38	#define KVM_PAGES_PER_HPAGE(x) (1UL<<31)
	39
	40	struct kvm_vcpu;
	41	u32 kvm_vcpu_reg(struct kvm_vcpu vcpu, u8 reg_num, u32 mode);
	42	int kvm_target_cpu(void);
	43	int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
	44	void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
	45
	46	struct kvm_arch {
	47	/* VTTBR value associated with below pgd and vmid */
	48	u64 vttbr;
	49
	50	/*
	51	* Anything that is not used directly from assembly code goes
	52	* here.
	53	*/
	54
	55	/* The VMID generation used for the virt. memory system */
	56	u64 vmid_gen;
	57	u32 vmid;
	58
	59	/* Stage-2 page table */
	60	pgd_t *pgd;
	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_arch {
	75	struct kvm_regs regs;
	76
	77	int target; /* Processor target */
	78	DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
	79
	80	/* System control coprocessor (cp15) */
	81	u32 cp15[NR_CP15_REGS];
	82
	83	/* The CPU type we expose to the VM */
	84	u32 midr;
	85
	86	/* Exception Information */
	87	u32 hsr; /* Hyp Syndrome Register */
	88	u32 hxfar; /* Hyp Data/Inst Fault Address Register */
	89	u32 hpfar; /* Hyp IPA Fault Address Register */
	90
f7ed45be CD	91	/* Floating point registers (VFP and Advanced SIMD/NEON) */
	92	struct vfp_hard_struct vfp_guest;
	93	struct vfp_hard_struct *vfp_host;
	94
	95	/*
	96	* Anything that is not used directly from assembly code goes
	97	* here.
	98	*/
5b3e5e5b CD	99	/* dcache set/way operation pending */
	100	int last_pcpu;
	101	cpumask_t require_dcache_flush;
	102
aa024c2f MZ	103	/* Don't run the guest on this vcpu */
	104	bool pause;
	105
45e96ea6 CD	106	/* IO related fields */
	107	struct kvm_decode mmio_decode;
	108
749cf76c CD	109	/* Interrupt related fields */
	110	u32 irq_lines; /* IRQ and FIQ levels */
	111
	112	/* Hyp exception information */
	113	u32 hyp_pc; /* PC when exception was taken from Hyp mode */
	114
	115	/* Cache some mmu pages needed inside spinlock regions */
	116	struct kvm_mmu_memory_cache mmu_page_cache;
f7ed45be CD	117
	118	/* Detect first run of a vcpu */
	119	bool has_run_once;
749cf76c CD	120	};
	121
	122	struct kvm_vm_stat {
	123	u32 remote_tlb_flush;
	124	};
	125
	126	struct kvm_vcpu_stat {
	127	u32 halt_wakeup;
	128	};
	129
	130	struct kvm_vcpu_init;
	131	int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
	132	const struct kvm_vcpu_init *init);
	133	unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
	134	int kvm_arm_copy_reg_indices(struct kvm_vcpu vcpu, u64 __user indices);
	135	struct kvm_one_reg;
	136	int kvm_arm_get_reg(struct kvm_vcpu vcpu, const struct kvm_one_reg reg);
	137	int kvm_arm_set_reg(struct kvm_vcpu vcpu, const struct kvm_one_reg reg);
342cd0ab	138	u64 kvm_call_hyp(void *hypfn, ...);
f7ed45be	139	void force_vm_exit(const cpumask_t *mask);
d5d8184d CD	140
	141	#define KVM_ARCH_WANT_MMU_NOTIFIER
	142	struct kvm;
	143	int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
	144	int kvm_unmap_hva_range(struct kvm *kvm,
	145	unsigned long start, unsigned long end);
	146	void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
	147
1138245c CD	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
d5d8184d CD	151	/* We do not have shadow page tables, hence the empty hooks */
	152	static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva)
	153	{
	154	return 0;
	155	}
	156
	157	static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
	158	{
	159	return 0;
	160	}
749cf76c	161	#endif /* __ARM_KVM_HOST_H__ */