[mirror_ubuntu-bionic-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>

#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_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 */

	/* 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;
};

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, ...);

#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);

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