[deliverable/linux.git] / drivers / kvm / kvm.h

#ifndef __KVM_H
#define __KVM_H

/*
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 */

#include <linux/types.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/mm.h>

#include "vmx.h"
#include <linux/kvm.h>

#define CR0_PE_MASK (1ULL << 0)
#define CR0_TS_MASK (1ULL << 3)
#define CR0_NE_MASK (1ULL << 5)
#define CR0_WP_MASK (1ULL << 16)
#define CR0_NW_MASK (1ULL << 29)
#define CR0_CD_MASK (1ULL << 30)
#define CR0_PG_MASK (1ULL << 31)

#define CR3_WPT_MASK (1ULL << 3)
#define CR3_PCD_MASK (1ULL << 4)

#define CR3_RESEVED_BITS 0x07ULL
#define CR3_L_MODE_RESEVED_BITS (~((1ULL << 40) - 1) | 0x0fe7ULL)
#define CR3_FLAGS_MASK ((1ULL << 5) - 1)

#define CR4_VME_MASK (1ULL << 0)
#define CR4_PSE_MASK (1ULL << 4)
#define CR4_PAE_MASK (1ULL << 5)
#define CR4_PGE_MASK (1ULL << 7)
#define CR4_VMXE_MASK (1ULL << 13)

#define KVM_GUEST_CR0_MASK \
	(CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK \
	 | CR0_NW_MASK | CR0_CD_MASK)
#define KVM_VM_CR0_ALWAYS_ON \
	(CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK)
#define KVM_GUEST_CR4_MASK \
	(CR4_PSE_MASK | CR4_PAE_MASK | CR4_PGE_MASK | CR4_VMXE_MASK | CR4_VME_MASK)
#define KVM_PMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK)
#define KVM_RMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK | CR4_VME_MASK)

#define INVALID_PAGE (~(hpa_t)0)
#define UNMAPPED_GVA (~(gpa_t)0)

#define KVM_MAX_VCPUS 1
#define KVM_MEMORY_SLOTS 4
#define KVM_NUM_MMU_PAGES 256

#define FX_IMAGE_SIZE 512
#define FX_IMAGE_ALIGN 16
#define FX_BUF_SIZE (2 * FX_IMAGE_SIZE + FX_IMAGE_ALIGN)

#define DE_VECTOR 0
#define DF_VECTOR 8
#define TS_VECTOR 10
#define NP_VECTOR 11
#define SS_VECTOR 12
#define GP_VECTOR 13
#define PF_VECTOR 14

#define SELECTOR_TI_MASK (1 << 2)
#define SELECTOR_RPL_MASK 0x03

#define IOPL_SHIFT 12

/*
 * Address types:
 *
 *  gva - guest virtual address
 *  gpa - guest physical address
 *  gfn - guest frame number
 *  hva - host virtual address
 *  hpa - host physical address
 *  hfn - host frame number
 */

typedef unsigned long  gva_t;
typedef u64            gpa_t;
typedef unsigned long  gfn_t;

typedef unsigned long  hva_t;
typedef u64            hpa_t;
typedef unsigned long  hfn_t;

struct kvm_mmu_page {
	struct list_head link;
	hpa_t page_hpa;
	unsigned long slot_bitmap; /* One bit set per slot which has memory
				    * in this shadow page.
				    */
	int global;              /* Set if all ptes in this page are global */
	u64 *parent_pte;
};

struct vmcs {
	u32 revision_id;
	u32 abort;
	char data[0];
};

#define vmx_msr_entry kvm_msr_entry

struct kvm_vcpu;

/*
 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 * mode.
 */
struct kvm_mmu {
	void (*new_cr3)(struct kvm_vcpu *vcpu);
	int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
	void (*inval_page)(struct kvm_vcpu *vcpu, gva_t gva);
	void (*free)(struct kvm_vcpu *vcpu);
	gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
	hpa_t root_hpa;
	int root_level;
	int shadow_root_level;
};

struct kvm_guest_debug {
	int enabled;
	unsigned long bp[4];
	int singlestep;
};

enum {
	VCPU_REGS_RAX = 0,
	VCPU_REGS_RCX = 1,
	VCPU_REGS_RDX = 2,
	VCPU_REGS_RBX = 3,
	VCPU_REGS_RSP = 4,
	VCPU_REGS_RBP = 5,
	VCPU_REGS_RSI = 6,
	VCPU_REGS_RDI = 7,
#ifdef CONFIG_X86_64
	VCPU_REGS_R8 = 8,
	VCPU_REGS_R9 = 9,
	VCPU_REGS_R10 = 10,
	VCPU_REGS_R11 = 11,
	VCPU_REGS_R12 = 12,
	VCPU_REGS_R13 = 13,
	VCPU_REGS_R14 = 14,
	VCPU_REGS_R15 = 15,
#endif
	NR_VCPU_REGS
};

enum {
	VCPU_SREG_CS,
	VCPU_SREG_DS,
	VCPU_SREG_ES,
	VCPU_SREG_FS,
	VCPU_SREG_GS,
	VCPU_SREG_SS,
	VCPU_SREG_TR,
	VCPU_SREG_LDTR,
};

struct kvm_vcpu {
	struct kvm *kvm;
	union {
		struct vmcs *vmcs;
		struct vcpu_svm *svm;
	};
	struct mutex mutex;
	int   cpu;
	int   launched;
	unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
#define NR_IRQ_WORDS KVM_IRQ_BITMAP_SIZE(unsigned long)
	unsigned long irq_pending[NR_IRQ_WORDS];
	unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
	unsigned long rip;      /* needs vcpu_load_rsp_rip() */

	unsigned long cr0;
	unsigned long cr2;
	unsigned long cr3;
	unsigned long cr4;
	unsigned long cr8;
	u64 shadow_efer;
	u64 apic_base;
	int nmsrs;
	struct vmx_msr_entry *guest_msrs;
	struct vmx_msr_entry *host_msrs;

	struct list_head free_pages;
	struct kvm_mmu_page page_header_buf[KVM_NUM_MMU_PAGES];
	struct kvm_mmu mmu;

	struct kvm_guest_debug guest_debug;

	char fx_buf[FX_BUF_SIZE];
	char *host_fx_image;
	char *guest_fx_image;

	int mmio_needed;
	int mmio_read_completed;
	int mmio_is_write;
	int mmio_size;
	unsigned char mmio_data[8];
	gpa_t mmio_phys_addr;

	struct {
		int active;
		u8 save_iopl;
		struct kvm_save_segment {
			u16 selector;
			unsigned long base;
			u32 limit;
			u32 ar;
		} tr, es, ds, fs, gs;
	} rmode;
};

struct kvm_memory_slot {
	gfn_t base_gfn;
	unsigned long npages;
	unsigned long flags;
	struct page **phys_mem;
	unsigned long *dirty_bitmap;
};

struct kvm {
	spinlock_t lock; /* protects everything except vcpus */
	int nmemslots;
	struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
	struct list_head active_mmu_pages;
	struct kvm_vcpu vcpus[KVM_MAX_VCPUS];
	int memory_config_version;
	int busy;
};

struct kvm_stat {
	u32 pf_fixed;
	u32 pf_guest;
	u32 tlb_flush;
	u32 invlpg;

	u32 exits;
	u32 io_exits;
	u32 mmio_exits;
	u32 signal_exits;
	u32 irq_exits;
};

struct descriptor_table {
	u16 limit;
	unsigned long base;
} __attribute__((packed));

struct kvm_arch_ops {
	int (*cpu_has_kvm_support)(void);          /* __init */
	int (*disabled_by_bios)(void);             /* __init */
	void (*hardware_enable)(void *dummy);      /* __init */
	void (*hardware_disable)(void *dummy);
	int (*hardware_setup)(void);               /* __init */
	void (*hardware_unsetup)(void);            /* __exit */

	int (*vcpu_create)(struct kvm_vcpu *vcpu);
	void (*vcpu_free)(struct kvm_vcpu *vcpu);

	struct kvm_vcpu *(*vcpu_load)(struct kvm_vcpu *vcpu);
	void (*vcpu_put)(struct kvm_vcpu *vcpu);

	int (*set_guest_debug)(struct kvm_vcpu *vcpu,
			       struct kvm_debug_guest *dbg);
	int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
	int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
	u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
	void (*get_segment)(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg);
	void (*set_segment)(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg);
	int (*is_long_mode)(struct kvm_vcpu *vcpu);
	void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
	void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
	void (*set_cr0_no_modeswitch)(struct kvm_vcpu *vcpu,
				      unsigned long cr0);
	void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
	void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
	void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
	void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
	void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
	void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
	void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
	unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
	void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
		       int *exception);
	void (*cache_regs)(struct kvm_vcpu *vcpu);
	void (*decache_regs)(struct kvm_vcpu *vcpu);
	unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
	void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);

	void (*invlpg)(struct kvm_vcpu *vcpu, gva_t addr);
	void (*tlb_flush)(struct kvm_vcpu *vcpu);
	void (*inject_page_fault)(struct kvm_vcpu *vcpu,
				  unsigned long addr, u32 err_code);

	void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);

	int (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
	int (*vcpu_setup)(struct kvm_vcpu *vcpu);
	void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
};

extern struct kvm_stat kvm_stat;
extern struct kvm_arch_ops *kvm_arch_ops;

#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)

int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module);
void kvm_exit_arch(void);

void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
int kvm_mmu_init(struct kvm_vcpu *vcpu);

int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);

hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);

void kvm_emulator_want_group7_invlpg(void);

extern hpa_t bad_page_address;

static inline struct page *gfn_to_page(struct kvm_memory_slot *slot, gfn_t gfn)
{
	return slot->phys_mem[gfn - slot->base_gfn];
}

struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
void mark_page_dirty(struct kvm *kvm, gfn_t gfn);

enum emulation_result {
	EMULATE_DONE,       /* no further processing */
	EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
	EMULATE_FAIL,         /* can't emulate this instruction */
};

int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
			unsigned long cr2, u16 error_code);
void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
		   unsigned long *rflags);

unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
		     unsigned long *rflags);

struct x86_emulate_ctxt;

int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
int emulate_clts(struct kvm_vcpu *vcpu);
int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr,
		    unsigned long *dest);
int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
		    unsigned long value);

void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);

#ifdef CONFIG_X86_64
void set_efer(struct kvm_vcpu *vcpu, u64 efer);
#endif

void fx_init(struct kvm_vcpu *vcpu);

void load_msrs(struct vmx_msr_entry *e, int n);
void save_msrs(struct vmx_msr_entry *e, int n);
void kvm_resched(struct kvm_vcpu *vcpu);

int kvm_read_guest(struct kvm_vcpu *vcpu,
	       gva_t addr,
	       unsigned long size,
	       void *dest);

int kvm_write_guest(struct kvm_vcpu *vcpu,
		gva_t addr,
		unsigned long size,
		void *data);

unsigned long segment_base(u16 selector);

static inline struct page *_gfn_to_page(struct kvm *kvm, gfn_t gfn)
{
	struct kvm_memory_slot *slot = gfn_to_memslot(kvm, gfn);
	return (slot) ? slot->phys_mem[gfn - slot->base_gfn] : NULL;
}

static inline int is_pae(struct kvm_vcpu *vcpu)
{
	return vcpu->cr4 & CR4_PAE_MASK;
}

static inline int is_pse(struct kvm_vcpu *vcpu)
{
	return vcpu->cr4 & CR4_PSE_MASK;
}

static inline int is_paging(struct kvm_vcpu *vcpu)
{
	return vcpu->cr0 & CR0_PG_MASK;
}

static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
{
	return slot - kvm->memslots;
}

static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
{
	struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);

	return (struct kvm_mmu_page *)page->private;
}

static inline u16 read_fs(void)
{
	u16 seg;
	asm ("mov %%fs, %0" : "=g"(seg));
	return seg;
}

static inline u16 read_gs(void)
{
	u16 seg;
	asm ("mov %%gs, %0" : "=g"(seg));
	return seg;
}

static inline u16 read_ldt(void)
{
	u16 ldt;
	asm ("sldt %0" : "=g"(ldt));
	return ldt;
}

static inline void load_fs(u16 sel)
{
	asm ("mov %0, %%fs" : : "rm"(sel));
}

static inline void load_gs(u16 sel)
{
	asm ("mov %0, %%gs" : : "rm"(sel));
}

#ifndef load_ldt
static inline void load_ldt(u16 sel)
{
	asm ("lldt %0" : : "g"(sel));
}
#endif

static inline void get_idt(struct descriptor_table *table)
{
	asm ("sidt %0" : "=m"(*table));
}

static inline void get_gdt(struct descriptor_table *table)
{
	asm ("sgdt %0" : "=m"(*table));
}

static inline unsigned long read_tr_base(void)
{
	u16 tr;
	asm ("str %0" : "=g"(tr));
	return segment_base(tr);
}

#ifdef CONFIG_X86_64
static inline unsigned long read_msr(unsigned long msr)
{
	u64 value;

	rdmsrl(msr, value);
	return value;
}
#endif

static inline void fx_save(void *image)
{
	asm ("fxsave (%0)":: "r" (image));
}

static inline void fx_restore(void *image)
{
	asm ("fxrstor (%0)":: "r" (image));
}

static inline void fpu_init(void)
{
	asm ("finit");
}

static inline u32 get_rdx_init_val(void)
{
	return 0x600; /* P6 family */
}

#define ASM_VMX_VMCLEAR_RAX       ".byte 0x66, 0x0f, 0xc7, 0x30"
#define ASM_VMX_VMLAUNCH          ".byte 0x0f, 0x01, 0xc2"
#define ASM_VMX_VMRESUME          ".byte 0x0f, 0x01, 0xc3"
#define ASM_VMX_VMPTRLD_RAX       ".byte 0x0f, 0xc7, 0x30"
#define ASM_VMX_VMREAD_RDX_RAX    ".byte 0x0f, 0x78, 0xd0"
#define ASM_VMX_VMWRITE_RAX_RDX   ".byte 0x0f, 0x79, 0xd0"
#define ASM_VMX_VMWRITE_RSP_RDX   ".byte 0x0f, 0x79, 0xd4"
#define ASM_VMX_VMXOFF            ".byte 0x0f, 0x01, 0xc4"
#define ASM_VMX_VMXON_RAX         ".byte 0xf3, 0x0f, 0xc7, 0x30"

#define MSR_IA32_TIME_STAMP_COUNTER		0x010

#define TSS_IOPB_BASE_OFFSET 0x66
#define TSS_BASE_SIZE 0x68
#define TSS_IOPB_SIZE (65536 / 8)
#define TSS_REDIRECTION_SIZE (256 / 8)
#define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)

#ifdef CONFIG_X86_64

/*
 * When emulating 32-bit mode, cr3 is only 32 bits even on x86_64.  Therefore
 * we need to allocate shadow page tables in the first 4GB of memory, which
 * happens to fit the DMA32 zone.
 */
#define GFP_KVM_MMU (GFP_KERNEL | __GFP_DMA32)

#else

#define GFP_KVM_MMU GFP_KERNEL

#endif

#endif
Commit	Line	Data
6aa8b732 AK	1	#ifndef __KVM_H
	2	#define __KVM_H
	3
	4	/*
	5	* This work is licensed under the terms of the GNU GPL, version 2. See
	6	* the COPYING file in the top-level directory.
	7	*/
	8
	9	#include <linux/types.h>
	10	#include <linux/list.h>
	11	#include <linux/mutex.h>
	12	#include <linux/spinlock.h>
	13	#include <linux/mm.h>
	14
	15	#include "vmx.h"
	16	#include <linux/kvm.h>
	17
	18	#define CR0_PE_MASK (1ULL << 0)
	19	#define CR0_TS_MASK (1ULL << 3)
	20	#define CR0_NE_MASK (1ULL << 5)
	21	#define CR0_WP_MASK (1ULL << 16)
	22	#define CR0_NW_MASK (1ULL << 29)
	23	#define CR0_CD_MASK (1ULL << 30)
	24	#define CR0_PG_MASK (1ULL << 31)
	25
	26	#define CR3_WPT_MASK (1ULL << 3)
	27	#define CR3_PCD_MASK (1ULL << 4)
	28
	29	#define CR3_RESEVED_BITS 0x07ULL
	30	#define CR3_L_MODE_RESEVED_BITS (~((1ULL << 40) - 1) \| 0x0fe7ULL)
	31	#define CR3_FLAGS_MASK ((1ULL << 5) - 1)
	32
	33	#define CR4_VME_MASK (1ULL << 0)
	34	#define CR4_PSE_MASK (1ULL << 4)
	35	#define CR4_PAE_MASK (1ULL << 5)
	36	#define CR4_PGE_MASK (1ULL << 7)
	37	#define CR4_VMXE_MASK (1ULL << 13)
	38
	39	#define KVM_GUEST_CR0_MASK \
	40	(CR0_PG_MASK \| CR0_PE_MASK \| CR0_WP_MASK \| CR0_NE_MASK \
	41	\| CR0_NW_MASK \| CR0_CD_MASK)
	42	#define KVM_VM_CR0_ALWAYS_ON \
	43	(CR0_PG_MASK \| CR0_PE_MASK \| CR0_WP_MASK \| CR0_NE_MASK)
	44	#define KVM_GUEST_CR4_MASK \
	45	(CR4_PSE_MASK \| CR4_PAE_MASK \| CR4_PGE_MASK \| CR4_VMXE_MASK \| CR4_VME_MASK)
	46	#define KVM_PMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK \| CR4_PAE_MASK)
	47	#define KVM_RMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK \| CR4_PAE_MASK \| CR4_VME_MASK)
	48
	49	#define INVALID_PAGE (~(hpa_t)0)
	50	#define UNMAPPED_GVA (~(gpa_t)0)
	51
	52	#define KVM_MAX_VCPUS 1
	53	#define KVM_MEMORY_SLOTS 4
	54	#define KVM_NUM_MMU_PAGES 256
	55
	56	#define FX_IMAGE_SIZE 512
	57	#define FX_IMAGE_ALIGN 16
	58	#define FX_BUF_SIZE (2 * FX_IMAGE_SIZE + FX_IMAGE_ALIGN)
	59
	60	#define DE_VECTOR 0
	61	#define DF_VECTOR 8
	62	#define TS_VECTOR 10
	63	#define NP_VECTOR 11
	64	#define SS_VECTOR 12
65	#define GP_VECTOR 13
66	#define PF_VECTOR 14
67
68	#define SELECTOR_TI_MASK (1 << 2)
69	#define SELECTOR_RPL_MASK 0x03
70
71	#define IOPL_SHIFT 12
72
73	/*
74	* Address types:
75	*
76	* gva - guest virtual address
77	* gpa - guest physical address
78	* gfn - guest frame number
79	* hva - host virtual address
80	* hpa - host physical address
81	* hfn - host frame number
82	*/
83
84	typedef unsigned long gva_t;
85	typedef u64 gpa_t;
86	typedef unsigned long gfn_t;
87
88	typedef unsigned long hva_t;
89	typedef u64 hpa_t;
90	typedef unsigned long hfn_t;
91
92	struct kvm_mmu_page {
93	struct list_head link;
94	hpa_t page_hpa;
95	unsigned long slot_bitmap; /* One bit set per slot which has memory
96	* in this shadow page.
97	*/
98	int global; /* Set if all ptes in this page are global */
99	u64 *parent_pte;
100	};
101
102	struct vmcs {
103	u32 revision_id;
104	u32 abort;
105	char data[0];
106	};
107
108	#define vmx_msr_entry kvm_msr_entry
109
110	struct kvm_vcpu;
111
112	/*
113	* x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
114	* 32-bit). The kvm_mmu structure abstracts the details of the current mmu
115	* mode.
116	*/
117	struct kvm_mmu {
118	void (new_cr3)(struct kvm_vcpu vcpu);
119	int (page_fault)(struct kvm_vcpu vcpu, gva_t gva, u32 err);
120	void (inval_page)(struct kvm_vcpu vcpu, gva_t gva);
121	void (free)(struct kvm_vcpu vcpu);
122	gpa_t (gva_to_gpa)(struct kvm_vcpu vcpu, gva_t gva);
123	hpa_t root_hpa;
124	int root_level;
125	int shadow_root_level;
126	};
127
128	struct kvm_guest_debug {
129	int enabled;
130	unsigned long bp[4];
131	int singlestep;
132	};
133
134	enum {
135	VCPU_REGS_RAX = 0,
136	VCPU_REGS_RCX = 1,
137	VCPU_REGS_RDX = 2,
138	VCPU_REGS_RBX = 3,
139	VCPU_REGS_RSP = 4,
140	VCPU_REGS_RBP = 5,
141	VCPU_REGS_RSI = 6,
142	VCPU_REGS_RDI = 7,
05b3e0c2	143	#ifdef CONFIG_X86_64
6aa8b732 AK	144	VCPU_REGS_R8 = 8,
	145	VCPU_REGS_R9 = 9,
	146	VCPU_REGS_R10 = 10,
	147	VCPU_REGS_R11 = 11,
	148	VCPU_REGS_R12 = 12,
	149	VCPU_REGS_R13 = 13,
	150	VCPU_REGS_R14 = 14,
	151	VCPU_REGS_R15 = 15,
	152	#endif
	153	NR_VCPU_REGS
	154	};
	155
	156	enum {
	157	VCPU_SREG_CS,
	158	VCPU_SREG_DS,
	159	VCPU_SREG_ES,
	160	VCPU_SREG_FS,
	161	VCPU_SREG_GS,
	162	VCPU_SREG_SS,
	163	VCPU_SREG_TR,
	164	VCPU_SREG_LDTR,
	165	};
	166
	167	struct kvm_vcpu {
	168	struct kvm *kvm;
	169	union {
	170	struct vmcs *vmcs;
	171	struct vcpu_svm *svm;
	172	};
	173	struct mutex mutex;
	174	int cpu;
	175	int launched;
	176	unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
	177	#define NR_IRQ_WORDS KVM_IRQ_BITMAP_SIZE(unsigned long)
	178	unsigned long irq_pending[NR_IRQ_WORDS];
	179	unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
	180	unsigned long rip; /* needs vcpu_load_rsp_rip() */
	181
	182	unsigned long cr0;
	183	unsigned long cr2;
	184	unsigned long cr3;
	185	unsigned long cr4;
	186	unsigned long cr8;
	187	u64 shadow_efer;
	188	u64 apic_base;
	189	int nmsrs;
	190	struct vmx_msr_entry *guest_msrs;
	191	struct vmx_msr_entry *host_msrs;
	192
	193	struct list_head free_pages;
	194	struct kvm_mmu_page page_header_buf[KVM_NUM_MMU_PAGES];
	195	struct kvm_mmu mmu;
	196
	197	struct kvm_guest_debug guest_debug;
	198
	199	char fx_buf[FX_BUF_SIZE];
	200	char *host_fx_image;
	201	char *guest_fx_image;
	202
	203	int mmio_needed;
	204	int mmio_read_completed;
	205	int mmio_is_write;
	206	int mmio_size;
	207	unsigned char mmio_data[8];
208	gpa_t mmio_phys_addr;
209
210	struct {
211	int active;
212	u8 save_iopl;
213	struct kvm_save_segment {
214	u16 selector;
215	unsigned long base;
216	u32 limit;
217	u32 ar;
218	} tr, es, ds, fs, gs;
219	} rmode;
220	};
221
222	struct kvm_memory_slot {
223	gfn_t base_gfn;
224	unsigned long npages;
225	unsigned long flags;
226	struct page **phys_mem;
227	unsigned long *dirty_bitmap;
228	};
229
230	struct kvm {
231	spinlock_t lock; /* protects everything except vcpus */
232	int nmemslots;
233	struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
234	struct list_head active_mmu_pages;
235	struct kvm_vcpu vcpus[KVM_MAX_VCPUS];
236	int memory_config_version;
237	int busy;
238	};
239
240	struct kvm_stat {
241	u32 pf_fixed;
242	u32 pf_guest;
243	u32 tlb_flush;
244	u32 invlpg;
245
246	u32 exits;
247	u32 io_exits;
248	u32 mmio_exits;
249	u32 signal_exits;
250	u32 irq_exits;
251	};
252
253	struct descriptor_table {
254	u16 limit;
255	unsigned long base;
256	} __attribute__((packed));
257
258	struct kvm_arch_ops {
259	int (cpu_has_kvm_support)(void); / __init */
260	int (disabled_by_bios)(void); / __init */
261	void (hardware_enable)(void dummy); /* __init */
262	void (hardware_disable)(void dummy);
263	int (hardware_setup)(void); / __init */
264	void (hardware_unsetup)(void); / __exit */
265
266	int (vcpu_create)(struct kvm_vcpu vcpu);
267	void (vcpu_free)(struct kvm_vcpu vcpu);
268
269	struct kvm_vcpu (vcpu_load)(struct kvm_vcpu *vcpu);
270	void (vcpu_put)(struct kvm_vcpu vcpu);
271
272	int (set_guest_debug)(struct kvm_vcpu vcpu,
273	struct kvm_debug_guest *dbg);
274	int (get_msr)(struct kvm_vcpu vcpu, u32 msr_index, u64 *pdata);
275	int (set_msr)(struct kvm_vcpu vcpu, u32 msr_index, u64 data);
276	u64 (get_segment_base)(struct kvm_vcpu vcpu, int seg);
277	void (get_segment)(struct kvm_vcpu vcpu,
278	struct kvm_segment *var, int seg);
279	void (set_segment)(struct kvm_vcpu vcpu,
280	struct kvm_segment *var, int seg);
281	int (is_long_mode)(struct kvm_vcpu vcpu);
282	void (get_cs_db_l_bits)(struct kvm_vcpu vcpu, int db, int l);
283	void (set_cr0)(struct kvm_vcpu vcpu, unsigned long cr0);
284	void (set_cr0_no_modeswitch)(struct kvm_vcpu vcpu,
285	unsigned long cr0);
286	void (set_cr3)(struct kvm_vcpu vcpu, unsigned long cr3);
287	void (set_cr4)(struct kvm_vcpu vcpu, unsigned long cr4);
288	void (set_efer)(struct kvm_vcpu vcpu, u64 efer);
289	void (get_idt)(struct kvm_vcpu vcpu, struct descriptor_table *dt);
290	void (set_idt)(struct kvm_vcpu vcpu, struct descriptor_table *dt);
291	void (get_gdt)(struct kvm_vcpu vcpu, struct descriptor_table *dt);
292	void (set_gdt)(struct kvm_vcpu vcpu, struct descriptor_table *dt);
293	unsigned long (get_dr)(struct kvm_vcpu vcpu, int dr);
294	void (set_dr)(struct kvm_vcpu vcpu, int dr, unsigned long value,
295	int *exception);
296	void (cache_regs)(struct kvm_vcpu vcpu);
297	void (decache_regs)(struct kvm_vcpu vcpu);
298	unsigned long (get_rflags)(struct kvm_vcpu vcpu);
299	void (set_rflags)(struct kvm_vcpu vcpu, unsigned long rflags);
300
301	void (invlpg)(struct kvm_vcpu vcpu, gva_t addr);
302	void (tlb_flush)(struct kvm_vcpu vcpu);
303	void (inject_page_fault)(struct kvm_vcpu vcpu,
304	unsigned long addr, u32 err_code);
305
306	void (inject_gp)(struct kvm_vcpu vcpu, unsigned err_code);
307
308	int (run)(struct kvm_vcpu vcpu, struct kvm_run *run);
309	int (vcpu_setup)(struct kvm_vcpu vcpu);
310	void (skip_emulated_instruction)(struct kvm_vcpu vcpu);
311	};
312
313	extern struct kvm_stat kvm_stat;
314	extern struct kvm_arch_ops *kvm_arch_ops;
315
316	#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
317	#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
318
319	int kvm_init_arch(struct kvm_arch_ops ops, struct module module);
320	void kvm_exit_arch(void);
321
322	void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
323	int kvm_mmu_init(struct kvm_vcpu *vcpu);
324
325	int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
326	void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
327
328	hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
329	#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
330	#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
331	static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
332	hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
333
334	void kvm_emulator_want_group7_invlpg(void);
335
336	extern hpa_t bad_page_address;
337
338	static inline struct page gfn_to_page(struct kvm_memory_slot slot, gfn_t gfn)
339	{
340	return slot->phys_mem[gfn - slot->base_gfn];
341	}
342
343	struct kvm_memory_slot gfn_to_memslot(struct kvm kvm, gfn_t gfn);
344	void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
345
346	enum emulation_result {
347	EMULATE_DONE, /* no further processing */
348	EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
349	EMULATE_FAIL, /* can't emulate this instruction */
350	};
351
352	int emulate_instruction(struct kvm_vcpu vcpu, struct kvm_run run,
353	unsigned long cr2, u16 error_code);
354	void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
355	void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
356	void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
357	unsigned long *rflags);
358
359	unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
360	void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
361	unsigned long *rflags);
362
363	struct x86_emulate_ctxt;
364
365	int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
366	int emulate_clts(struct kvm_vcpu *vcpu);
367	int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr,
368	unsigned long *dest);
369	int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
370	unsigned long value);
371
372	void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
373	void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
374	void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
375	void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
376	void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
377
05b3e0c2	378	#ifdef CONFIG_X86_64
6aa8b732 AK	379	void set_efer(struct kvm_vcpu *vcpu, u64 efer);
	380	#endif
	381
	382	void fx_init(struct kvm_vcpu *vcpu);
	383
	384	void load_msrs(struct vmx_msr_entry *e, int n);
	385	void save_msrs(struct vmx_msr_entry *e, int n);
	386	void kvm_resched(struct kvm_vcpu *vcpu);
	387
	388	int kvm_read_guest(struct kvm_vcpu *vcpu,
	389	gva_t addr,
	390	unsigned long size,
	391	void *dest);
	392
	393	int kvm_write_guest(struct kvm_vcpu *vcpu,
	394	gva_t addr,
	395	unsigned long size,
	396	void *data);
	397
	398	unsigned long segment_base(u16 selector);
	399
	400	static inline struct page _gfn_to_page(struct kvm kvm, gfn_t gfn)
	401	{
	402	struct kvm_memory_slot *slot = gfn_to_memslot(kvm, gfn);
	403	return (slot) ? slot->phys_mem[gfn - slot->base_gfn] : NULL;
	404	}
	405
	406	static inline int is_pae(struct kvm_vcpu *vcpu)
	407	{
	408	return vcpu->cr4 & CR4_PAE_MASK;
	409	}
	410
	411	static inline int is_pse(struct kvm_vcpu *vcpu)
	412	{
	413	return vcpu->cr4 & CR4_PSE_MASK;
	414	}
	415
	416	static inline int is_paging(struct kvm_vcpu *vcpu)
	417	{
	418	return vcpu->cr0 & CR0_PG_MASK;
	419	}
	420
	421	static inline int memslot_id(struct kvm kvm, struct kvm_memory_slot slot)
	422	{
	423	return slot - kvm->memslots;
	424	}
	425
	426	static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
	427	{
	428	struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
	429
	430	return (struct kvm_mmu_page *)page->private;
	431	}
	432
	433	static inline u16 read_fs(void)
	434	{
	435	u16 seg;
	436	asm ("mov %%fs, %0" : "=g"(seg));
	437	return seg;
	438	}
	439
	440	static inline u16 read_gs(void)
	441	{
	442	u16 seg;
443	asm ("mov %%gs, %0" : "=g"(seg));
444	return seg;
445	}
446
447	static inline u16 read_ldt(void)
448	{
449	u16 ldt;
450	asm ("sldt %0" : "=g"(ldt));
451	return ldt;
452	}
453
454	static inline void load_fs(u16 sel)
455	{
456	asm ("mov %0, %%fs" : : "rm"(sel));
457	}
458
459	static inline void load_gs(u16 sel)
460	{
461	asm ("mov %0, %%gs" : : "rm"(sel));
462	}
463
464	#ifndef load_ldt
465	static inline void load_ldt(u16 sel)
466	{
467	asm ("lldt %0" : : "g"(sel));
468	}
469	#endif
470
471	static inline void get_idt(struct descriptor_table *table)
472	{
473	asm ("sidt %0" : "=m"(*table));
474	}
475
476	static inline void get_gdt(struct descriptor_table *table)
477	{
478	asm ("sgdt %0" : "=m"(*table));
479	}
480
481	static inline unsigned long read_tr_base(void)
482	{
483	u16 tr;
484	asm ("str %0" : "=g"(tr));
485	return segment_base(tr);
486	}
487
05b3e0c2	488	#ifdef CONFIG_X86_64
6aa8b732 AK	489	static inline unsigned long read_msr(unsigned long msr)
	490	{
	491	u64 value;
	492
	493	rdmsrl(msr, value);
	494	return value;
	495	}
	496	#endif
	497
	498	static inline void fx_save(void *image)
	499	{
	500	asm ("fxsave (%0)":: "r" (image));
	501	}
	502
	503	static inline void fx_restore(void *image)
	504	{
	505	asm ("fxrstor (%0)":: "r" (image));
	506	}
	507
	508	static inline void fpu_init(void)
	509	{
	510	asm ("finit");
	511	}
	512
	513	static inline u32 get_rdx_init_val(void)
	514	{
	515	return 0x600; /* P6 family */
	516	}
	517
	518	#define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
	519	#define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
	520	#define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
	521	#define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
	522	#define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
	523	#define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
	524	#define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
	525	#define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
	526	#define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
	527
	528	#define MSR_IA32_TIME_STAMP_COUNTER 0x010
	529
	530	#define TSS_IOPB_BASE_OFFSET 0x66
	531	#define TSS_BASE_SIZE 0x68
	532	#define TSS_IOPB_SIZE (65536 / 8)
	533	#define TSS_REDIRECTION_SIZE (256 / 8)
	534	#define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
	535
05b3e0c2	536	#ifdef CONFIG_X86_64
6aa8b732 AK	537
	538	/*
	539	* When emulating 32-bit mode, cr3 is only 32 bits even on x86_64. Therefore
	540	* we need to allocate shadow page tables in the first 4GB of memory, which
	541	* happens to fit the DMA32 zone.
	542	*/
	543	#define GFP_KVM_MMU (GFP_KERNEL \| __GFP_DMA32)
	544
	545	#else
	546
	547	#define GFP_KVM_MMU GFP_KERNEL
	548
	549	#endif
	550
	551	#endif