arch/powerpc/include/asm/kvm_host.h - kernel/msm-4.19 - Gitiles

 /*
  * 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.
  *
  * Copyright IBM Corp. 2007
  *
  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  */

 #ifndef __POWERPC_KVM_HOST_H__
 #define __POWERPC_KVM_HOST_H__

 #include <linux/mutex.h>
 #include <linux/hrtimer.h>
 #include <linux/interrupt.h>
 #include <linux/types.h>
 #include <linux/kvm_types.h>
 #include <linux/threads.h>
 #include <linux/spinlock.h>
 #include <linux/kvm_para.h>
 #include <linux/list.h>
 #include <linux/atomic.h>
 #include <asm/kvm_asm.h>
 #include <asm/processor.h>
 #include <asm/page.h>

 #define KVM_MAX_VCPUS		NR_CPUS
 #define KVM_MAX_VCORES		NR_CPUS
 #define KVM_MEMORY_SLOTS 32
 /* memory slots that does not exposed to userspace */
 #define KVM_PRIVATE_MEM_SLOTS 4
 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)

 #ifdef CONFIG_KVM_MMIO
 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
 #endif

 #ifdef CONFIG_KVM_BOOK3S_64_HV
 #include <linux/mmu_notifier.h>

 #define KVM_ARCH_WANT_MMU_NOTIFIER

 struct kvm;
 extern int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
 extern int kvm_age_hva(struct kvm *kvm, unsigned long hva);
 extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 extern void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);

 #endif

 /* 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)

 #define HPTEG_CACHE_NUM			(1 << 15)
 #define HPTEG_HASH_BITS_PTE		13
 #define HPTEG_HASH_BITS_PTE_LONG	12
 #define HPTEG_HASH_BITS_VPTE		13
 #define HPTEG_HASH_BITS_VPTE_LONG	5
 #define HPTEG_HASH_NUM_PTE		(1 << HPTEG_HASH_BITS_PTE)
 #define HPTEG_HASH_NUM_PTE_LONG		(1 << HPTEG_HASH_BITS_PTE_LONG)
 #define HPTEG_HASH_NUM_VPTE		(1 << HPTEG_HASH_BITS_VPTE)
 #define HPTEG_HASH_NUM_VPTE_LONG	(1 << HPTEG_HASH_BITS_VPTE_LONG)

 /* Physical Address Mask - allowed range of real mode RAM access */
 #define KVM_PAM			0x0fffffffffffffffULL

 struct kvm;
 struct kvm_run;
 struct kvm_vcpu;

 struct lppaca;
 struct slb_shadow;
 struct dtl;

 struct kvm_vm_stat {
 	u32 remote_tlb_flush;
 };

 struct kvm_vcpu_stat {
 	u32 sum_exits;
 	u32 mmio_exits;
 	u32 dcr_exits;
 	u32 signal_exits;
 	u32 light_exits;
 	/* Account for special types of light exits: */
 	u32 itlb_real_miss_exits;
 	u32 itlb_virt_miss_exits;
 	u32 dtlb_real_miss_exits;
 	u32 dtlb_virt_miss_exits;
 	u32 syscall_exits;
 	u32 isi_exits;
 	u32 dsi_exits;
 	u32 emulated_inst_exits;
 	u32 dec_exits;
 	u32 ext_intr_exits;
 	u32 halt_wakeup;
 #ifdef CONFIG_PPC_BOOK3S
 	u32 pf_storage;
 	u32 pf_instruc;
 	u32 sp_storage;
 	u32 sp_instruc;
 	u32 queue_intr;
 	u32 ld;
 	u32 ld_slow;
 	u32 st;
 	u32 st_slow;
 #endif
 };

 enum kvm_exit_types {
 	MMIO_EXITS,
 	DCR_EXITS,
 	SIGNAL_EXITS,
 	ITLB_REAL_MISS_EXITS,
 	ITLB_VIRT_MISS_EXITS,
 	DTLB_REAL_MISS_EXITS,
 	DTLB_VIRT_MISS_EXITS,
 	SYSCALL_EXITS,
 	ISI_EXITS,
 	DSI_EXITS,
 	EMULATED_INST_EXITS,
 	EMULATED_MTMSRWE_EXITS,
 	EMULATED_WRTEE_EXITS,
 	EMULATED_MTSPR_EXITS,
 	EMULATED_MFSPR_EXITS,
 	EMULATED_MTMSR_EXITS,
 	EMULATED_MFMSR_EXITS,
 	EMULATED_TLBSX_EXITS,
 	EMULATED_TLBWE_EXITS,
 	EMULATED_RFI_EXITS,
 	DEC_EXITS,
 	EXT_INTR_EXITS,
 	HALT_WAKEUP,
 	USR_PR_INST,
 	FP_UNAVAIL,
 	DEBUG_EXITS,
 	TIMEINGUEST,
 	__NUMBER_OF_KVM_EXIT_TYPES
 };

 /* allow access to big endian 32bit upper/lower parts and 64bit var */
 struct kvmppc_exit_timing {
 	union {
 		u64 tv64;
 		struct {
 			u32 tbu, tbl;
 		} tv32;
 	};
 };

 struct kvmppc_pginfo {
 	unsigned long pfn;
 	atomic_t refcnt;
 };

 struct kvmppc_spapr_tce_table {
 	struct list_head list;
 	struct kvm *kvm;
 	u64 liobn;
 	u32 window_size;
 	struct page *pages[0];
 };

 struct kvmppc_linear_info {
 	void		*base_virt;
 	unsigned long	 base_pfn;
 	unsigned long	 npages;
 	struct list_head list;
 	atomic_t	 use_count;
 	int		 type;
 };

 /*
  * The reverse mapping array has one entry for each HPTE,
  * which stores the guest's view of the second word of the HPTE
  * (including the guest physical address of the mapping),
  * plus forward and backward pointers in a doubly-linked ring
  * of HPTEs that map the same host page.  The pointers in this
  * ring are 32-bit HPTE indexes, to save space.
  */
 struct revmap_entry {
 	unsigned long guest_rpte;
 	unsigned int forw, back;
 };

 /*
  * We use the top bit of each memslot->rmap entry as a lock bit,
  * and bit 32 as a present flag.  The bottom 32 bits are the
  * index in the guest HPT of a HPTE that points to the page.
  */
 #define KVMPPC_RMAP_LOCK_BIT	63
 #define KVMPPC_RMAP_RC_SHIFT	32
 #define KVMPPC_RMAP_REFERENCED	(HPTE_R_R << KVMPPC_RMAP_RC_SHIFT)
 #define KVMPPC_RMAP_CHANGED	(HPTE_R_C << KVMPPC_RMAP_RC_SHIFT)
 #define KVMPPC_RMAP_PRESENT	0x100000000ul
 #define KVMPPC_RMAP_INDEX	0xfffffffful

 /* Low-order bits in kvm->arch.slot_phys[][] */
 #define KVMPPC_PAGE_ORDER_MASK	0x1f
 #define KVMPPC_PAGE_NO_CACHE	HPTE_R_I	/* 0x20 */
 #define KVMPPC_PAGE_WRITETHRU	HPTE_R_W	/* 0x40 */
 #define KVMPPC_GOT_PAGE		0x80

 struct kvm_arch_memory_slot {
 };

 struct kvm_arch {
 #ifdef CONFIG_KVM_BOOK3S_64_HV
 	unsigned long hpt_virt;
 	struct revmap_entry *revmap;
 	unsigned int lpid;
 	unsigned int host_lpid;
 	unsigned long host_lpcr;
 	unsigned long sdr1;
 	unsigned long host_sdr1;
 	int tlbie_lock;
 	unsigned long lpcr;
 	unsigned long rmor;
 	struct kvmppc_linear_info *rma;
 	unsigned long vrma_slb_v;
 	int rma_setup_done;
 	int using_mmu_notifiers;
 	struct list_head spapr_tce_tables;
 	spinlock_t slot_phys_lock;
 	unsigned long *slot_phys[KVM_MEM_SLOTS_NUM];
 	int slot_npages[KVM_MEM_SLOTS_NUM];
 	unsigned short last_vcpu[NR_CPUS];
 	struct kvmppc_vcore *vcores[KVM_MAX_VCORES];
 	struct kvmppc_linear_info *hpt_li;
 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 };

 /*
  * Struct for a virtual core.
  * Note: entry_exit_count combines an entry count in the bottom 8 bits
  * and an exit count in the next 8 bits.  This is so that we can
  * atomically increment the entry count iff the exit count is 0
  * without taking the lock.
  */
 struct kvmppc_vcore {
 	int n_runnable;
 	int n_busy;
 	int num_threads;
 	int entry_exit_count;
 	int n_woken;
 	int nap_count;
 	int napping_threads;
 	u16 pcpu;
 	u8 vcore_state;
 	u8 in_guest;
 	struct list_head runnable_threads;
 	spinlock_t lock;
 	wait_queue_head_t wq;
 };

 #define VCORE_ENTRY_COUNT(vc)	((vc)->entry_exit_count & 0xff)
 #define VCORE_EXIT_COUNT(vc)	((vc)->entry_exit_count >> 8)

 /* Values for vcore_state */
 #define VCORE_INACTIVE	0
 #define VCORE_RUNNING	1
 #define VCORE_EXITING	2
 #define VCORE_SLEEPING	3

 struct kvmppc_pte {
 	ulong eaddr;
 	u64 vpage;
 	ulong raddr;
 	bool may_read		: 1;
 	bool may_write		: 1;
 	bool may_execute	: 1;
 };

 struct kvmppc_mmu {
 	/* book3s_64 only */
 	void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs);
 	u64  (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr);
 	u64  (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr);
 	void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr);
 	void (*slbia)(struct kvm_vcpu *vcpu);
 	/* book3s */
 	void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value);
 	u32  (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum);
 	int  (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data);
 	void (*reset_msr)(struct kvm_vcpu *vcpu);
 	void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large);
 	int  (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid);
 	u64  (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data);
 	bool (*is_dcbz32)(struct kvm_vcpu *vcpu);
 };

 struct kvmppc_slb {
 	u64 esid;
 	u64 vsid;
 	u64 orige;
 	u64 origv;
 	bool valid	: 1;
 	bool Ks		: 1;
 	bool Kp		: 1;
 	bool nx		: 1;
 	bool large	: 1;	/* PTEs are 16MB */
 	bool tb		: 1;	/* 1TB segment */
 	bool class	: 1;
 };

 struct kvm_vcpu_arch {
 	ulong host_stack;
 	u32 host_pid;
 #ifdef CONFIG_PPC_BOOK3S
 	struct kvmppc_slb slb[64];
 	int slb_max;		/* 1 + index of last valid entry in slb[] */
 	int slb_nr;		/* total number of entries in SLB */
 	struct kvmppc_mmu mmu;
 #endif

 	ulong gpr[32];

 	u64 fpr[32];
 	u64 fpscr;

 #ifdef CONFIG_SPE
 	ulong evr[32];
 	ulong spefscr;
 	ulong host_spefscr;
 	u64 acc;
 #endif
 #ifdef CONFIG_ALTIVEC
 	vector128 vr[32];
 	vector128 vscr;
 #endif

 #ifdef CONFIG_VSX
 	u64 vsr[64];
 #endif

 #ifdef CONFIG_PPC_BOOK3S
 	/* For Gekko paired singles */
 	u32 qpr[32];
 #endif

 	ulong pc;
 	ulong ctr;
 	ulong lr;

 	ulong xer;
 	u32 cr;

 #ifdef CONFIG_PPC_BOOK3S
 	ulong hflags;
 	ulong guest_owned_ext;
 	ulong purr;
 	ulong spurr;
 	ulong dscr;
 	ulong amr;
 	ulong uamor;
 	u32 ctrl;
 	ulong dabr;
 #endif
 	u32 vrsave; /* also USPRG0 */
 	u32 mmucr;
 	ulong shadow_msr;
 	ulong csrr0;
 	ulong csrr1;
 	ulong dsrr0;
 	ulong dsrr1;
 	ulong mcsrr0;
 	ulong mcsrr1;
 	ulong mcsr;
 	u32 dec;
 	u32 decar;
 	u32 tbl;
 	u32 tbu;
 	u32 tcr;
 	ulong tsr; /* we need to perform set/clr_bits() which requires ulong */
 	u32 ivor[64];
 	ulong ivpr;
 	u32 pvr;

 	u32 shadow_pid;
 	u32 shadow_pid1;
 	u32 pid;
 	u32 swap_pid;

 	u32 ccr0;
 	u32 ccr1;
 	u32 dbcr0;
 	u32 dbcr1;
 	u32 dbsr;

 	u64 mmcr[3];
 	u32 pmc[8];

 #ifdef CONFIG_KVM_EXIT_TIMING
 	struct mutex exit_timing_lock;
 	struct kvmppc_exit_timing timing_exit;
 	struct kvmppc_exit_timing timing_last_enter;
 	u32 last_exit_type;
 	u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES];
 	u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 	u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 	u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 	u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 	u64 timing_last_exit;
 	struct dentry *debugfs_exit_timing;
 #endif

 #ifdef CONFIG_PPC_BOOK3S
 	ulong fault_dar;
 	u32 fault_dsisr;
 #endif

 #ifdef CONFIG_BOOKE
 	ulong fault_dear;
 	ulong fault_esr;
 	ulong queued_dear;
 	ulong queued_esr;
 #endif
 	gpa_t paddr_accessed;

 	u8 io_gpr; /* GPR used as IO source/target */
 	u8 mmio_is_bigendian;
 	u8 mmio_sign_extend;
 	u8 dcr_needed;
 	u8 dcr_is_write;
 	u8 osi_needed;
 	u8 osi_enabled;
 	u8 papr_enabled;
 	u8 sane;
 	u8 cpu_type;
 	u8 hcall_needed;

 	u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */

 	struct hrtimer dec_timer;
 	struct tasklet_struct tasklet;
 	u64 dec_jiffies;
 	u64 dec_expires;
 	unsigned long pending_exceptions;
 	u16 last_cpu;
 	u8 ceded;
 	u8 prodded;
 	u32 last_inst;

 	struct lppaca *vpa;
 	struct slb_shadow *slb_shadow;
 	struct dtl *dtl;
 	struct dtl *dtl_end;

 	wait_queue_head_t *wqp;
 	struct kvmppc_vcore *vcore;
 	int ret;
 	int trap;
 	int state;
 	int ptid;
 	bool timer_running;
 	wait_queue_head_t cpu_run;

 	struct kvm_vcpu_arch_shared *shared;
 	unsigned long magic_page_pa; /* phys addr to map the magic page to */
 	unsigned long magic_page_ea; /* effect. addr to map the magic page to */

 #ifdef CONFIG_KVM_BOOK3S_64_HV
 	struct kvm_vcpu_arch_shared shregs;

 	unsigned long pgfault_addr;
 	long pgfault_index;
 	unsigned long pgfault_hpte[2];

 	struct list_head run_list;
 	struct task_struct *run_task;
 	struct kvm_run *kvm_run;
 	pgd_t *pgdir;
 #endif
 };

 /* Values for vcpu->arch.state */
 #define KVMPPC_VCPU_STOPPED		0
 #define KVMPPC_VCPU_BUSY_IN_HOST	1
 #define KVMPPC_VCPU_RUNNABLE		2

 /* Values for vcpu->arch.io_gpr */
 #define KVM_MMIO_REG_MASK	0x001f
 #define KVM_MMIO_REG_EXT_MASK	0xffe0
 #define KVM_MMIO_REG_GPR	0x0000
 #define KVM_MMIO_REG_FPR	0x0020
 #define KVM_MMIO_REG_QPR	0x0040
 #define KVM_MMIO_REG_FQPR	0x0060

 #endif /* __POWERPC_KVM_HOST_H__ */
	/*
	* 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.
	*
	* Copyright IBM Corp. 2007
	*
	* Authors: Hollis Blanchard <hollisb@us.ibm.com>
	*/

	#ifndef __POWERPC_KVM_HOST_H__
	#define __POWERPC_KVM_HOST_H__

	#include <linux/mutex.h>
	#include <linux/hrtimer.h>
	#include <linux/interrupt.h>
	#include <linux/types.h>
	#include <linux/kvm_types.h>
	#include <linux/threads.h>
	#include <linux/spinlock.h>
	#include <linux/kvm_para.h>
	#include <linux/list.h>
	#include <linux/atomic.h>
	#include <asm/kvm_asm.h>
	#include <asm/processor.h>
	#include <asm/page.h>

	#define KVM_MAX_VCPUS NR_CPUS
	#define KVM_MAX_VCORES NR_CPUS
	#define KVM_MEMORY_SLOTS 32
	/* memory slots that does not exposed to userspace */
	#define KVM_PRIVATE_MEM_SLOTS 4
	#define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)

	#ifdef CONFIG_KVM_MMIO
	#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
	#endif

	#ifdef CONFIG_KVM_BOOK3S_64_HV
	#include <linux/mmu_notifier.h>

	#define KVM_ARCH_WANT_MMU_NOTIFIER

	struct kvm;
	extern int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
	extern int kvm_age_hva(struct kvm *kvm, unsigned long hva);
	extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
	extern void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);

	#endif

	/* 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)

	#define HPTEG_CACHE_NUM (1 << 15)
	#define HPTEG_HASH_BITS_PTE 13
	#define HPTEG_HASH_BITS_PTE_LONG 12
	#define HPTEG_HASH_BITS_VPTE 13
	#define HPTEG_HASH_BITS_VPTE_LONG 5
	#define HPTEG_HASH_NUM_PTE (1 << HPTEG_HASH_BITS_PTE)
	#define HPTEG_HASH_NUM_PTE_LONG (1 << HPTEG_HASH_BITS_PTE_LONG)
	#define HPTEG_HASH_NUM_VPTE (1 << HPTEG_HASH_BITS_VPTE)
	#define HPTEG_HASH_NUM_VPTE_LONG (1 << HPTEG_HASH_BITS_VPTE_LONG)

	/* Physical Address Mask - allowed range of real mode RAM access */
	#define KVM_PAM 0x0fffffffffffffffULL

	struct kvm;
	struct kvm_run;
	struct kvm_vcpu;

	struct lppaca;
	struct slb_shadow;
	struct dtl;

	struct kvm_vm_stat {
	u32 remote_tlb_flush;
	};

	struct kvm_vcpu_stat {
	u32 sum_exits;
	u32 mmio_exits;
	u32 dcr_exits;
	u32 signal_exits;
	u32 light_exits;
	/* Account for special types of light exits: */
	u32 itlb_real_miss_exits;
	u32 itlb_virt_miss_exits;
	u32 dtlb_real_miss_exits;
	u32 dtlb_virt_miss_exits;
	u32 syscall_exits;
	u32 isi_exits;
	u32 dsi_exits;
	u32 emulated_inst_exits;
	u32 dec_exits;
	u32 ext_intr_exits;
	u32 halt_wakeup;
	#ifdef CONFIG_PPC_BOOK3S
	u32 pf_storage;
	u32 pf_instruc;
	u32 sp_storage;
	u32 sp_instruc;
	u32 queue_intr;
	u32 ld;
	u32 ld_slow;
	u32 st;
	u32 st_slow;
	#endif
	};

	enum kvm_exit_types {
	MMIO_EXITS,
	DCR_EXITS,
	SIGNAL_EXITS,
	ITLB_REAL_MISS_EXITS,
	ITLB_VIRT_MISS_EXITS,
	DTLB_REAL_MISS_EXITS,
	DTLB_VIRT_MISS_EXITS,
	SYSCALL_EXITS,
	ISI_EXITS,
	DSI_EXITS,
	EMULATED_INST_EXITS,
	EMULATED_MTMSRWE_EXITS,
	EMULATED_WRTEE_EXITS,
	EMULATED_MTSPR_EXITS,
	EMULATED_MFSPR_EXITS,
	EMULATED_MTMSR_EXITS,
	EMULATED_MFMSR_EXITS,
	EMULATED_TLBSX_EXITS,
	EMULATED_TLBWE_EXITS,
	EMULATED_RFI_EXITS,
	DEC_EXITS,
	EXT_INTR_EXITS,
	HALT_WAKEUP,
	USR_PR_INST,
	FP_UNAVAIL,
	DEBUG_EXITS,
	TIMEINGUEST,
	__NUMBER_OF_KVM_EXIT_TYPES
	};

	/* allow access to big endian 32bit upper/lower parts and 64bit var */
	struct kvmppc_exit_timing {
	union {
	u64 tv64;
	struct {
	u32 tbu, tbl;
	} tv32;
	};
	};

	struct kvmppc_pginfo {
	unsigned long pfn;
	atomic_t refcnt;
	};

	struct kvmppc_spapr_tce_table {
	struct list_head list;
	struct kvm *kvm;
	u64 liobn;
	u32 window_size;
	struct page *pages[0];
	};

	struct kvmppc_linear_info {
	void *base_virt;
	unsigned long base_pfn;
	unsigned long npages;
	struct list_head list;
	atomic_t use_count;
	int type;
	};

	/*
	* The reverse mapping array has one entry for each HPTE,
	* which stores the guest's view of the second word of the HPTE
	* (including the guest physical address of the mapping),
	* plus forward and backward pointers in a doubly-linked ring
	* of HPTEs that map the same host page. The pointers in this
	* ring are 32-bit HPTE indexes, to save space.
	*/
	struct revmap_entry {
	unsigned long guest_rpte;
	unsigned int forw, back;
	};

	/*
	* We use the top bit of each memslot->rmap entry as a lock bit,
	* and bit 32 as a present flag. The bottom 32 bits are the
	* index in the guest HPT of a HPTE that points to the page.
	*/
	#define KVMPPC_RMAP_LOCK_BIT 63
	#define KVMPPC_RMAP_RC_SHIFT 32
	#define KVMPPC_RMAP_REFERENCED (HPTE_R_R << KVMPPC_RMAP_RC_SHIFT)
	#define KVMPPC_RMAP_CHANGED (HPTE_R_C << KVMPPC_RMAP_RC_SHIFT)
	#define KVMPPC_RMAP_PRESENT 0x100000000ul
	#define KVMPPC_RMAP_INDEX 0xfffffffful

	/* Low-order bits in kvm->arch.slot_phys[][] */
	#define KVMPPC_PAGE_ORDER_MASK 0x1f
	#define KVMPPC_PAGE_NO_CACHE HPTE_R_I /* 0x20 */
	#define KVMPPC_PAGE_WRITETHRU HPTE_R_W /* 0x40 */
	#define KVMPPC_GOT_PAGE 0x80

	struct kvm_arch_memory_slot {
	};

	struct kvm_arch {
	#ifdef CONFIG_KVM_BOOK3S_64_HV
	unsigned long hpt_virt;
	struct revmap_entry *revmap;
	unsigned int lpid;
	unsigned int host_lpid;
	unsigned long host_lpcr;
	unsigned long sdr1;
	unsigned long host_sdr1;
	int tlbie_lock;
	unsigned long lpcr;
	unsigned long rmor;
	struct kvmppc_linear_info *rma;
	unsigned long vrma_slb_v;
	int rma_setup_done;
	int using_mmu_notifiers;
	struct list_head spapr_tce_tables;
	spinlock_t slot_phys_lock;
	unsigned long *slot_phys[KVM_MEM_SLOTS_NUM];
	int slot_npages[KVM_MEM_SLOTS_NUM];
	unsigned short last_vcpu[NR_CPUS];
	struct kvmppc_vcore *vcores[KVM_MAX_VCORES];
	struct kvmppc_linear_info *hpt_li;
	#endif /* CONFIG_KVM_BOOK3S_64_HV */
	};

	/*
	* Struct for a virtual core.
	* Note: entry_exit_count combines an entry count in the bottom 8 bits
	* and an exit count in the next 8 bits. This is so that we can
	* atomically increment the entry count iff the exit count is 0
	* without taking the lock.
	*/
	struct kvmppc_vcore {
	int n_runnable;
	int n_busy;
	int num_threads;
	int entry_exit_count;
	int n_woken;
	int nap_count;
	int napping_threads;
	u16 pcpu;
	u8 vcore_state;
	u8 in_guest;
	struct list_head runnable_threads;
	spinlock_t lock;
	wait_queue_head_t wq;
	};

	#define VCORE_ENTRY_COUNT(vc) ((vc)->entry_exit_count & 0xff)
	#define VCORE_EXIT_COUNT(vc) ((vc)->entry_exit_count >> 8)

	/* Values for vcore_state */
	#define VCORE_INACTIVE 0
	#define VCORE_RUNNING 1
	#define VCORE_EXITING 2
	#define VCORE_SLEEPING 3

	struct kvmppc_pte {
	ulong eaddr;
	u64 vpage;
	ulong raddr;
	bool may_read : 1;
	bool may_write : 1;
	bool may_execute : 1;
	};

	struct kvmppc_mmu {
	/* book3s_64 only */
	void (slbmte)(struct kvm_vcpu vcpu, u64 rb, u64 rs);
	u64 (slbmfee)(struct kvm_vcpu vcpu, u64 slb_nr);
	u64 (slbmfev)(struct kvm_vcpu vcpu, u64 slb_nr);
	void (slbie)(struct kvm_vcpu vcpu, u64 slb_nr);
	void (slbia)(struct kvm_vcpu vcpu);
	/* book3s */
	void (mtsrin)(struct kvm_vcpu vcpu, u32 srnum, ulong value);
	u32 (mfsrin)(struct kvm_vcpu vcpu, u32 srnum);
	int (xlate)(struct kvm_vcpu vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data);
	void (reset_msr)(struct kvm_vcpu vcpu);
	void (tlbie)(struct kvm_vcpu vcpu, ulong addr, bool large);
	int (esid_to_vsid)(struct kvm_vcpu vcpu, ulong esid, u64 *vsid);
	u64 (ea_to_vp)(struct kvm_vcpu vcpu, gva_t eaddr, bool data);
	bool (is_dcbz32)(struct kvm_vcpu vcpu);
	};

	struct kvmppc_slb {
	u64 esid;
	u64 vsid;
	u64 orige;
	u64 origv;
	bool valid : 1;
	bool Ks : 1;
	bool Kp : 1;
	bool nx : 1;
	bool large : 1; /* PTEs are 16MB */
	bool tb : 1; /* 1TB segment */
	bool class : 1;
	};

	struct kvm_vcpu_arch {
	ulong host_stack;
	u32 host_pid;
	#ifdef CONFIG_PPC_BOOK3S
	struct kvmppc_slb slb[64];
	int slb_max; /* 1 + index of last valid entry in slb[] */
	int slb_nr; /* total number of entries in SLB */
	struct kvmppc_mmu mmu;
	#endif

	ulong gpr[32];

	u64 fpr[32];
	u64 fpscr;

	#ifdef CONFIG_SPE
	ulong evr[32];
	ulong spefscr;
	ulong host_spefscr;
	u64 acc;
	#endif
	#ifdef CONFIG_ALTIVEC
	vector128 vr[32];
	vector128 vscr;
	#endif

	#ifdef CONFIG_VSX
	u64 vsr[64];
	#endif

	#ifdef CONFIG_PPC_BOOK3S
	/* For Gekko paired singles */
	u32 qpr[32];
	#endif

	ulong pc;
	ulong ctr;
	ulong lr;

	ulong xer;
	u32 cr;

	#ifdef CONFIG_PPC_BOOK3S
	ulong hflags;
	ulong guest_owned_ext;
	ulong purr;
	ulong spurr;
	ulong dscr;
	ulong amr;
	ulong uamor;
	u32 ctrl;
	ulong dabr;
	#endif
	u32 vrsave; /* also USPRG0 */
	u32 mmucr;
	ulong shadow_msr;
	ulong csrr0;
	ulong csrr1;
	ulong dsrr0;
	ulong dsrr1;
	ulong mcsrr0;
	ulong mcsrr1;
	ulong mcsr;
	u32 dec;
	u32 decar;
	u32 tbl;
	u32 tbu;
	u32 tcr;
	ulong tsr; /* we need to perform set/clr_bits() which requires ulong */
	u32 ivor[64];
	ulong ivpr;
	u32 pvr;

	u32 shadow_pid;
	u32 shadow_pid1;
	u32 pid;
	u32 swap_pid;

	u32 ccr0;
	u32 ccr1;
	u32 dbcr0;
	u32 dbcr1;
	u32 dbsr;

	u64 mmcr[3];
	u32 pmc[8];

	#ifdef CONFIG_KVM_EXIT_TIMING
	struct mutex exit_timing_lock;
	struct kvmppc_exit_timing timing_exit;
	struct kvmppc_exit_timing timing_last_enter;
	u32 last_exit_type;
	u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES];
	u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES];
	u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES];
	u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES];
	u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES];
	u64 timing_last_exit;
	struct dentry *debugfs_exit_timing;
	#endif

	#ifdef CONFIG_PPC_BOOK3S
	ulong fault_dar;
	u32 fault_dsisr;
	#endif

	#ifdef CONFIG_BOOKE
	ulong fault_dear;
	ulong fault_esr;
	ulong queued_dear;
	ulong queued_esr;
	#endif
	gpa_t paddr_accessed;

	u8 io_gpr; /* GPR used as IO source/target */
	u8 mmio_is_bigendian;
	u8 mmio_sign_extend;
	u8 dcr_needed;
	u8 dcr_is_write;
	u8 osi_needed;
	u8 osi_enabled;
	u8 papr_enabled;
	u8 sane;
	u8 cpu_type;
	u8 hcall_needed;

	u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */

	struct hrtimer dec_timer;
	struct tasklet_struct tasklet;
	u64 dec_jiffies;
	u64 dec_expires;
	unsigned long pending_exceptions;
	u16 last_cpu;
	u8 ceded;
	u8 prodded;
	u32 last_inst;

	struct lppaca *vpa;
	struct slb_shadow *slb_shadow;
	struct dtl *dtl;
	struct dtl *dtl_end;

	wait_queue_head_t *wqp;
	struct kvmppc_vcore *vcore;
	int ret;
	int trap;
	int state;
	int ptid;
	bool timer_running;
	wait_queue_head_t cpu_run;

	struct kvm_vcpu_arch_shared *shared;
	unsigned long magic_page_pa; /* phys addr to map the magic page to */
	unsigned long magic_page_ea; /* effect. addr to map the magic page to */

	#ifdef CONFIG_KVM_BOOK3S_64_HV
	struct kvm_vcpu_arch_shared shregs;

	unsigned long pgfault_addr;
	long pgfault_index;
	unsigned long pgfault_hpte[2];

	struct list_head run_list;
	struct task_struct *run_task;
	struct kvm_run *kvm_run;
	pgd_t *pgdir;
	#endif
	};

	/* Values for vcpu->arch.state */
	#define KVMPPC_VCPU_STOPPED 0
	#define KVMPPC_VCPU_BUSY_IN_HOST 1
	#define KVMPPC_VCPU_RUNNABLE 2

	/* Values for vcpu->arch.io_gpr */
	#define KVM_MMIO_REG_MASK 0x001f
	#define KVM_MMIO_REG_EXT_MASK 0xffe0
	#define KVM_MMIO_REG_GPR 0x0000
	#define KVM_MMIO_REG_FPR 0x0020
	#define KVM_MMIO_REG_QPR 0x0040
	#define KVM_MMIO_REG_FQPR 0x0060

	#endif /* __POWERPC_KVM_HOST_H__ */