arch/s390/include/asm/kvm_host.h - kernel/msm-4.19 - Gitiles

 /*
  * definition for kernel virtual machines on s390
  *
  * Copyright IBM Corp. 2008, 2009
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License (version 2 only)
  * as published by the Free Software Foundation.
  *
  *    Author(s): Carsten Otte <cotte@de.ibm.com>
  */


 #ifndef ASM_KVM_HOST_H
 #define ASM_KVM_HOST_H

 #include <linux/types.h>
 #include <linux/hrtimer.h>
 #include <linux/interrupt.h>
 #include <linux/kvm_types.h>
 #include <linux/kvm_host.h>
 #include <linux/kvm.h>
 #include <linux/seqlock.h>
 #include <asm/debug.h>
 #include <asm/cpu.h>
 #include <asm/fpu/api.h>
 #include <asm/isc.h>

 #define KVM_S390_BSCA_CPU_SLOTS 64
 #define KVM_S390_ESCA_CPU_SLOTS 248
 #define KVM_MAX_VCPUS KVM_S390_ESCA_CPU_SLOTS
 #define KVM_USER_MEM_SLOTS 32

 /*
  * These seem to be used for allocating ->chip in the routing table,
  * which we don't use. 4096 is an out-of-thin-air value. If we need
  * to look at ->chip later on, we'll need to revisit this.
  */
 #define KVM_NR_IRQCHIPS 1
 #define KVM_IRQCHIP_NUM_PINS 4096
 #define KVM_HALT_POLL_NS_DEFAULT 80000

 /* s390-specific vcpu->requests bit members */
 #define KVM_REQ_ENABLE_IBS         8
 #define KVM_REQ_DISABLE_IBS        9

 #define SIGP_CTRL_C		0x80
 #define SIGP_CTRL_SCN_MASK	0x3f

 union bsca_sigp_ctrl {
 	__u8 value;
 	struct {
 		__u8 c : 1;
 		__u8 r : 1;
 		__u8 scn : 6;
 	};
 } __packed;

 union esca_sigp_ctrl {
 	__u16 value;
 	struct {
 		__u8 c : 1;
 		__u8 reserved: 7;
 		__u8 scn;
 	};
 } __packed;

 struct esca_entry {
 	union esca_sigp_ctrl sigp_ctrl;
 	__u16   reserved1[3];
 	__u64   sda;
 	__u64   reserved2[6];
 } __packed;

 struct bsca_entry {
 	__u8	reserved0;
 	union bsca_sigp_ctrl	sigp_ctrl;
 	__u16	reserved[3];
 	__u64	sda;
 	__u64	reserved2[2];
 } __attribute__((packed));

 union ipte_control {
 	unsigned long val;
 	struct {
 		unsigned long k  : 1;
 		unsigned long kh : 31;
 		unsigned long kg : 32;
 	};
 };

 struct bsca_block {
 	union ipte_control ipte_control;
 	__u64	reserved[5];
 	__u64	mcn;
 	__u64	reserved2;
 	struct bsca_entry cpu[KVM_S390_BSCA_CPU_SLOTS];
 } __attribute__((packed));

 struct esca_block {
 	union ipte_control ipte_control;
 	__u64   reserved1[7];
 	__u64   mcn[4];
 	__u64   reserved2[20];
 	struct esca_entry cpu[KVM_S390_ESCA_CPU_SLOTS];
 } __packed;

 #define CPUSTAT_STOPPED    0x80000000
 #define CPUSTAT_WAIT       0x10000000
 #define CPUSTAT_ECALL_PEND 0x08000000
 #define CPUSTAT_STOP_INT   0x04000000
 #define CPUSTAT_IO_INT     0x02000000
 #define CPUSTAT_EXT_INT    0x01000000
 #define CPUSTAT_RUNNING    0x00800000
 #define CPUSTAT_RETAINED   0x00400000
 #define CPUSTAT_TIMING_SUB 0x00020000
 #define CPUSTAT_SIE_SUB    0x00010000
 #define CPUSTAT_RRF        0x00008000
 #define CPUSTAT_SLSV       0x00004000
 #define CPUSTAT_SLSR       0x00002000
 #define CPUSTAT_ZARCH      0x00000800
 #define CPUSTAT_MCDS       0x00000100
 #define CPUSTAT_SM         0x00000080
 #define CPUSTAT_IBS        0x00000040
 #define CPUSTAT_GED2       0x00000010
 #define CPUSTAT_G          0x00000008
 #define CPUSTAT_GED        0x00000004
 #define CPUSTAT_J          0x00000002
 #define CPUSTAT_P          0x00000001

 struct kvm_s390_sie_block {
 	atomic_t cpuflags;		/* 0x0000 */
 	__u32 : 1;			/* 0x0004 */
 	__u32 prefix : 18;
 	__u32 : 1;
 	__u32 ibc : 12;
 	__u8	reserved08[4];		/* 0x0008 */
 #define PROG_IN_SIE (1<<0)
 	__u32	prog0c;			/* 0x000c */
 	__u8	reserved10[16];		/* 0x0010 */
 #define PROG_BLOCK_SIE	(1<<0)
 #define PROG_REQUEST	(1<<1)
 	atomic_t prog20;		/* 0x0020 */
 	__u8	reserved24[4];		/* 0x0024 */
 	__u64	cputm;			/* 0x0028 */
 	__u64	ckc;			/* 0x0030 */
 	__u64	epoch;			/* 0x0038 */
 	__u8	reserved40[4];		/* 0x0040 */
 #define LCTL_CR0	0x8000
 #define LCTL_CR6	0x0200
 #define LCTL_CR9	0x0040
 #define LCTL_CR10	0x0020
 #define LCTL_CR11	0x0010
 #define LCTL_CR14	0x0002
 	__u16   lctl;			/* 0x0044 */
 	__s16	icpua;			/* 0x0046 */
 #define ICTL_OPEREXC	0x80000000
 #define ICTL_PINT	0x20000000
 #define ICTL_LPSW	0x00400000
 #define ICTL_STCTL	0x00040000
 #define ICTL_ISKE	0x00004000
 #define ICTL_SSKE	0x00002000
 #define ICTL_RRBE	0x00001000
 #define ICTL_TPROT	0x00000200
 	__u32	ictl;			/* 0x0048 */
 	__u32	eca;			/* 0x004c */
 #define ICPT_INST	0x04
 #define ICPT_PROGI	0x08
 #define ICPT_INSTPROGI	0x0C
 #define ICPT_OPEREXC	0x2C
 #define ICPT_PARTEXEC	0x38
 #define ICPT_IOINST	0x40
 	__u8	icptcode;		/* 0x0050 */
 	__u8	icptstatus;		/* 0x0051 */
 	__u16	ihcpu;			/* 0x0052 */
 	__u8	reserved54[2];		/* 0x0054 */
 	__u16	ipa;			/* 0x0056 */
 	__u32	ipb;			/* 0x0058 */
 	__u32	scaoh;			/* 0x005c */
 	__u8	reserved60;		/* 0x0060 */
 	__u8	ecb;			/* 0x0061 */
 	__u8    ecb2;                   /* 0x0062 */
 #define ECB3_AES 0x04
 #define ECB3_DEA 0x08
 	__u8    ecb3;			/* 0x0063 */
 	__u32	scaol;			/* 0x0064 */
 	__u8	reserved68[4];		/* 0x0068 */
 	__u32	todpr;			/* 0x006c */
 	__u8	reserved70[32];		/* 0x0070 */
 	psw_t	gpsw;			/* 0x0090 */
 	__u64	gg14;			/* 0x00a0 */
 	__u64	gg15;			/* 0x00a8 */
 	__u8	reservedb0[20];		/* 0x00b0 */
 	__u16	extcpuaddr;		/* 0x00c4 */
 	__u16	eic;			/* 0x00c6 */
 	__u32	reservedc8;		/* 0x00c8 */
 	__u16	pgmilc;			/* 0x00cc */
 	__u16	iprcc;			/* 0x00ce */
 	__u32	dxc;			/* 0x00d0 */
 	__u16	mcn;			/* 0x00d4 */
 	__u8	perc;			/* 0x00d6 */
 	__u8	peratmid;		/* 0x00d7 */
 	__u64	peraddr;		/* 0x00d8 */
 	__u8	eai;			/* 0x00e0 */
 	__u8	peraid;			/* 0x00e1 */
 	__u8	oai;			/* 0x00e2 */
 	__u8	armid;			/* 0x00e3 */
 	__u8	reservede4[4];		/* 0x00e4 */
 	__u64	tecmc;			/* 0x00e8 */
 	__u8	reservedf0[12];		/* 0x00f0 */
 #define CRYCB_FORMAT1 0x00000001
 #define CRYCB_FORMAT2 0x00000003
 	__u32	crycbd;			/* 0x00fc */
 	__u64	gcr[16];		/* 0x0100 */
 	__u64	gbea;			/* 0x0180 */
 	__u8	reserved188[24];	/* 0x0188 */
 	__u32	fac;			/* 0x01a0 */
 	__u8	reserved1a4[20];	/* 0x01a4 */
 	__u64	cbrlo;			/* 0x01b8 */
 	__u8	reserved1c0[8];		/* 0x01c0 */
 	__u32	ecd;			/* 0x01c8 */
 	__u8	reserved1cc[18];	/* 0x01cc */
 	__u64	pp;			/* 0x01de */
 	__u8	reserved1e6[2];		/* 0x01e6 */
 	__u64	itdba;			/* 0x01e8 */
 	__u64   riccbd;			/* 0x01f0 */
 	__u8    reserved1f8[8];		/* 0x01f8 */
 } __attribute__((packed));

 struct kvm_s390_itdb {
 	__u8	data[256];
 } __packed;

 struct sie_page {
 	struct kvm_s390_sie_block sie_block;
 	__u8 reserved200[1024];		/* 0x0200 */
 	struct kvm_s390_itdb itdb;	/* 0x0600 */
 	__u8 reserved700[2304];		/* 0x0700 */
 } __packed;

 struct kvm_vcpu_stat {
 	u32 exit_userspace;
 	u32 exit_null;
 	u32 exit_external_request;
 	u32 exit_external_interrupt;
 	u32 exit_stop_request;
 	u32 exit_validity;
 	u32 exit_instruction;
 	u32 halt_successful_poll;
 	u32 halt_attempted_poll;
 	u32 halt_poll_invalid;
 	u32 halt_wakeup;
 	u32 instruction_lctl;
 	u32 instruction_lctlg;
 	u32 instruction_stctl;
 	u32 instruction_stctg;
 	u32 exit_program_interruption;
 	u32 exit_instr_and_program;
 	u32 exit_operation_exception;
 	u32 deliver_external_call;
 	u32 deliver_emergency_signal;
 	u32 deliver_service_signal;
 	u32 deliver_virtio_interrupt;
 	u32 deliver_stop_signal;
 	u32 deliver_prefix_signal;
 	u32 deliver_restart_signal;
 	u32 deliver_program_int;
 	u32 deliver_io_int;
 	u32 exit_wait_state;
 	u32 instruction_pfmf;
 	u32 instruction_stidp;
 	u32 instruction_spx;
 	u32 instruction_stpx;
 	u32 instruction_stap;
 	u32 instruction_storage_key;
 	u32 instruction_ipte_interlock;
 	u32 instruction_stsch;
 	u32 instruction_chsc;
 	u32 instruction_stsi;
 	u32 instruction_stfl;
 	u32 instruction_tprot;
 	u32 instruction_essa;
 	u32 instruction_sthyi;
 	u32 instruction_sigp_sense;
 	u32 instruction_sigp_sense_running;
 	u32 instruction_sigp_external_call;
 	u32 instruction_sigp_emergency;
 	u32 instruction_sigp_cond_emergency;
 	u32 instruction_sigp_start;
 	u32 instruction_sigp_stop;
 	u32 instruction_sigp_stop_store_status;
 	u32 instruction_sigp_store_status;
 	u32 instruction_sigp_store_adtl_status;
 	u32 instruction_sigp_arch;
 	u32 instruction_sigp_prefix;
 	u32 instruction_sigp_restart;
 	u32 instruction_sigp_init_cpu_reset;
 	u32 instruction_sigp_cpu_reset;
 	u32 instruction_sigp_unknown;
 	u32 diagnose_10;
 	u32 diagnose_44;
 	u32 diagnose_9c;
 	u32 diagnose_258;
 	u32 diagnose_308;
 	u32 diagnose_500;
 };

 #define PGM_OPERATION			0x01
 #define PGM_PRIVILEGED_OP		0x02
 #define PGM_EXECUTE			0x03
 #define PGM_PROTECTION			0x04
 #define PGM_ADDRESSING			0x05
 #define PGM_SPECIFICATION		0x06
 #define PGM_DATA			0x07
 #define PGM_FIXED_POINT_OVERFLOW	0x08
 #define PGM_FIXED_POINT_DIVIDE		0x09
 #define PGM_DECIMAL_OVERFLOW		0x0a
 #define PGM_DECIMAL_DIVIDE		0x0b
 #define PGM_HFP_EXPONENT_OVERFLOW	0x0c
 #define PGM_HFP_EXPONENT_UNDERFLOW	0x0d
 #define PGM_HFP_SIGNIFICANCE		0x0e
 #define PGM_HFP_DIVIDE			0x0f
 #define PGM_SEGMENT_TRANSLATION		0x10
 #define PGM_PAGE_TRANSLATION		0x11
 #define PGM_TRANSLATION_SPEC		0x12
 #define PGM_SPECIAL_OPERATION		0x13
 #define PGM_OPERAND			0x15
 #define PGM_TRACE_TABEL			0x16
 #define PGM_VECTOR_PROCESSING		0x1b
 #define PGM_SPACE_SWITCH		0x1c
 #define PGM_HFP_SQUARE_ROOT		0x1d
 #define PGM_PC_TRANSLATION_SPEC		0x1f
 #define PGM_AFX_TRANSLATION		0x20
 #define PGM_ASX_TRANSLATION		0x21
 #define PGM_LX_TRANSLATION		0x22
 #define PGM_EX_TRANSLATION		0x23
 #define PGM_PRIMARY_AUTHORITY		0x24
 #define PGM_SECONDARY_AUTHORITY		0x25
 #define PGM_LFX_TRANSLATION		0x26
 #define PGM_LSX_TRANSLATION		0x27
 #define PGM_ALET_SPECIFICATION		0x28
 #define PGM_ALEN_TRANSLATION		0x29
 #define PGM_ALE_SEQUENCE		0x2a
 #define PGM_ASTE_VALIDITY		0x2b
 #define PGM_ASTE_SEQUENCE		0x2c
 #define PGM_EXTENDED_AUTHORITY		0x2d
 #define PGM_LSTE_SEQUENCE		0x2e
 #define PGM_ASTE_INSTANCE		0x2f
 #define PGM_STACK_FULL			0x30
 #define PGM_STACK_EMPTY			0x31
 #define PGM_STACK_SPECIFICATION		0x32
 #define PGM_STACK_TYPE			0x33
 #define PGM_STACK_OPERATION		0x34
 #define PGM_ASCE_TYPE			0x38
 #define PGM_REGION_FIRST_TRANS		0x39
 #define PGM_REGION_SECOND_TRANS		0x3a
 #define PGM_REGION_THIRD_TRANS		0x3b
 #define PGM_MONITOR			0x40
 #define PGM_PER				0x80
 #define PGM_CRYPTO_OPERATION		0x119

 /* irq types in order of priority */
 enum irq_types {
 	IRQ_PEND_MCHK_EX = 0,
 	IRQ_PEND_SVC,
 	IRQ_PEND_PROG,
 	IRQ_PEND_MCHK_REP,
 	IRQ_PEND_EXT_IRQ_KEY,
 	IRQ_PEND_EXT_MALFUNC,
 	IRQ_PEND_EXT_EMERGENCY,
 	IRQ_PEND_EXT_EXTERNAL,
 	IRQ_PEND_EXT_CLOCK_COMP,
 	IRQ_PEND_EXT_CPU_TIMER,
 	IRQ_PEND_EXT_TIMING,
 	IRQ_PEND_EXT_SERVICE,
 	IRQ_PEND_EXT_HOST,
 	IRQ_PEND_PFAULT_INIT,
 	IRQ_PEND_PFAULT_DONE,
 	IRQ_PEND_VIRTIO,
 	IRQ_PEND_IO_ISC_0,
 	IRQ_PEND_IO_ISC_1,
 	IRQ_PEND_IO_ISC_2,
 	IRQ_PEND_IO_ISC_3,
 	IRQ_PEND_IO_ISC_4,
 	IRQ_PEND_IO_ISC_5,
 	IRQ_PEND_IO_ISC_6,
 	IRQ_PEND_IO_ISC_7,
 	IRQ_PEND_SIGP_STOP,
 	IRQ_PEND_RESTART,
 	IRQ_PEND_SET_PREFIX,
 	IRQ_PEND_COUNT
 };

 /* We have 2M for virtio device descriptor pages. Smallest amount of
  * memory per page is 24 bytes (1 queue), so (2048*1024) / 24 = 87381
  */
 #define KVM_S390_MAX_VIRTIO_IRQS 87381

 /*
  * Repressible (non-floating) machine check interrupts
  * subclass bits in MCIC
  */
 #define MCHK_EXTD_BIT 58
 #define MCHK_DEGR_BIT 56
 #define MCHK_WARN_BIT 55
 #define MCHK_REP_MASK ((1UL << MCHK_DEGR_BIT) | \
 		       (1UL << MCHK_EXTD_BIT) | \
 		       (1UL << MCHK_WARN_BIT))

 /* Exigent machine check interrupts subclass bits in MCIC */
 #define MCHK_SD_BIT 63
 #define MCHK_PD_BIT 62
 #define MCHK_EX_MASK ((1UL << MCHK_SD_BIT) | (1UL << MCHK_PD_BIT))

 #define IRQ_PEND_EXT_MASK ((1UL << IRQ_PEND_EXT_IRQ_KEY)    | \
 			   (1UL << IRQ_PEND_EXT_CLOCK_COMP) | \
 			   (1UL << IRQ_PEND_EXT_CPU_TIMER)  | \
 			   (1UL << IRQ_PEND_EXT_MALFUNC)    | \
 			   (1UL << IRQ_PEND_EXT_EMERGENCY)  | \
 			   (1UL << IRQ_PEND_EXT_EXTERNAL)   | \
 			   (1UL << IRQ_PEND_EXT_TIMING)     | \
 			   (1UL << IRQ_PEND_EXT_HOST)       | \
 			   (1UL << IRQ_PEND_EXT_SERVICE)    | \
 			   (1UL << IRQ_PEND_VIRTIO)         | \
 			   (1UL << IRQ_PEND_PFAULT_INIT)    | \
 			   (1UL << IRQ_PEND_PFAULT_DONE))

 #define IRQ_PEND_IO_MASK ((1UL << IRQ_PEND_IO_ISC_0) | \
 			  (1UL << IRQ_PEND_IO_ISC_1) | \
 			  (1UL << IRQ_PEND_IO_ISC_2) | \
 			  (1UL << IRQ_PEND_IO_ISC_3) | \
 			  (1UL << IRQ_PEND_IO_ISC_4) | \
 			  (1UL << IRQ_PEND_IO_ISC_5) | \
 			  (1UL << IRQ_PEND_IO_ISC_6) | \
 			  (1UL << IRQ_PEND_IO_ISC_7))

 #define IRQ_PEND_MCHK_MASK ((1UL << IRQ_PEND_MCHK_REP) | \
 			    (1UL << IRQ_PEND_MCHK_EX))

 struct kvm_s390_interrupt_info {
 	struct list_head list;
 	u64	type;
 	union {
 		struct kvm_s390_io_info io;
 		struct kvm_s390_ext_info ext;
 		struct kvm_s390_pgm_info pgm;
 		struct kvm_s390_emerg_info emerg;
 		struct kvm_s390_extcall_info extcall;
 		struct kvm_s390_prefix_info prefix;
 		struct kvm_s390_stop_info stop;
 		struct kvm_s390_mchk_info mchk;
 	};
 };

 struct kvm_s390_irq_payload {
 	struct kvm_s390_io_info io;
 	struct kvm_s390_ext_info ext;
 	struct kvm_s390_pgm_info pgm;
 	struct kvm_s390_emerg_info emerg;
 	struct kvm_s390_extcall_info extcall;
 	struct kvm_s390_prefix_info prefix;
 	struct kvm_s390_stop_info stop;
 	struct kvm_s390_mchk_info mchk;
 };

 struct kvm_s390_local_interrupt {
 	spinlock_t lock;
 	struct kvm_s390_float_interrupt *float_int;
 	struct swait_queue_head *wq;
 	atomic_t *cpuflags;
 	DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS);
 	struct kvm_s390_irq_payload irq;
 	unsigned long pending_irqs;
 };

 #define FIRQ_LIST_IO_ISC_0 0
 #define FIRQ_LIST_IO_ISC_1 1
 #define FIRQ_LIST_IO_ISC_2 2
 #define FIRQ_LIST_IO_ISC_3 3
 #define FIRQ_LIST_IO_ISC_4 4
 #define FIRQ_LIST_IO_ISC_5 5
 #define FIRQ_LIST_IO_ISC_6 6
 #define FIRQ_LIST_IO_ISC_7 7
 #define FIRQ_LIST_PFAULT   8
 #define FIRQ_LIST_VIRTIO   9
 #define FIRQ_LIST_COUNT   10
 #define FIRQ_CNTR_IO       0
 #define FIRQ_CNTR_SERVICE  1
 #define FIRQ_CNTR_VIRTIO   2
 #define FIRQ_CNTR_PFAULT   3
 #define FIRQ_MAX_COUNT     4

 struct kvm_s390_float_interrupt {
 	unsigned long pending_irqs;
 	spinlock_t lock;
 	struct list_head lists[FIRQ_LIST_COUNT];
 	int counters[FIRQ_MAX_COUNT];
 	struct kvm_s390_mchk_info mchk;
 	struct kvm_s390_ext_info srv_signal;
 	int next_rr_cpu;
 	unsigned long idle_mask[BITS_TO_LONGS(KVM_MAX_VCPUS)];
 };

 struct kvm_hw_wp_info_arch {
 	unsigned long addr;
 	unsigned long phys_addr;
 	int len;
 	char *old_data;
 };

 struct kvm_hw_bp_info_arch {
 	unsigned long addr;
 	int len;
 };

 /*
  * Only the upper 16 bits of kvm_guest_debug->control are arch specific.
  * Further KVM_GUESTDBG flags which an be used from userspace can be found in
  * arch/s390/include/uapi/asm/kvm.h
  */
 #define KVM_GUESTDBG_EXIT_PENDING 0x10000000

 #define guestdbg_enabled(vcpu) \
 		(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)
 #define guestdbg_sstep_enabled(vcpu) \
 		(vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
 #define guestdbg_hw_bp_enabled(vcpu) \
 		(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
 #define guestdbg_exit_pending(vcpu) (guestdbg_enabled(vcpu) && \
 		(vcpu->guest_debug & KVM_GUESTDBG_EXIT_PENDING))

 struct kvm_guestdbg_info_arch {
 	unsigned long cr0;
 	unsigned long cr9;
 	unsigned long cr10;
 	unsigned long cr11;
 	struct kvm_hw_bp_info_arch *hw_bp_info;
 	struct kvm_hw_wp_info_arch *hw_wp_info;
 	int nr_hw_bp;
 	int nr_hw_wp;
 	unsigned long last_bp;
 };

 struct kvm_vcpu_arch {
 	struct kvm_s390_sie_block *sie_block;
 	unsigned int      host_acrs[NUM_ACRS];
 	struct fpu	  host_fpregs;
 	struct kvm_s390_local_interrupt local_int;
 	struct hrtimer    ckc_timer;
 	struct kvm_s390_pgm_info pgm;
 	struct gmap *gmap;
 	struct kvm_guestdbg_info_arch guestdbg;
 	unsigned long pfault_token;
 	unsigned long pfault_select;
 	unsigned long pfault_compare;
 	bool cputm_enabled;
 	/*
 	 * The seqcount protects updates to cputm_start and sie_block.cputm,
 	 * this way we can have non-blocking reads with consistent values.
 	 * Only the owning VCPU thread (vcpu->cpu) is allowed to change these
 	 * values and to start/stop/enable/disable cpu timer accounting.
 	 */
 	seqcount_t cputm_seqcount;
 	__u64 cputm_start;
 };

 struct kvm_vm_stat {
 	u32 remote_tlb_flush;
 };

 struct kvm_arch_memory_slot {
 };

 struct s390_map_info {
 	struct list_head list;
 	__u64 guest_addr;
 	__u64 addr;
 	struct page *page;
 };

 struct s390_io_adapter {
 	unsigned int id;
 	int isc;
 	bool maskable;
 	bool masked;
 	bool swap;
 	struct rw_semaphore maps_lock;
 	struct list_head maps;
 	atomic_t nr_maps;
 };

 #define MAX_S390_IO_ADAPTERS ((MAX_ISC + 1) * 8)
 #define MAX_S390_ADAPTER_MAPS 256

 /* maximum size of facilities and facility mask is 2k bytes */
 #define S390_ARCH_FAC_LIST_SIZE_BYTE (1<<11)
 #define S390_ARCH_FAC_LIST_SIZE_U64 \
 	(S390_ARCH_FAC_LIST_SIZE_BYTE / sizeof(u64))
 #define S390_ARCH_FAC_MASK_SIZE_BYTE S390_ARCH_FAC_LIST_SIZE_BYTE
 #define S390_ARCH_FAC_MASK_SIZE_U64 \
 	(S390_ARCH_FAC_MASK_SIZE_BYTE / sizeof(u64))

 struct kvm_s390_cpu_model {
 	/* facility mask supported by kvm & hosting machine */
 	__u64 fac_mask[S390_ARCH_FAC_LIST_SIZE_U64];
 	/* facility list requested by guest (in dma page) */
 	__u64 *fac_list;
 	u64 cpuid;
 	unsigned short ibc;
 };

 struct kvm_s390_crypto {
 	struct kvm_s390_crypto_cb *crycb;
 	__u32 crycbd;
 	__u8 aes_kw;
 	__u8 dea_kw;
 };

 struct kvm_s390_crypto_cb {
 	__u8    reserved00[72];                 /* 0x0000 */
 	__u8    dea_wrapping_key_mask[24];      /* 0x0048 */
 	__u8    aes_wrapping_key_mask[32];      /* 0x0060 */
 	__u8    reserved80[128];                /* 0x0080 */
 };

 /*
  * sie_page2 has to be allocated as DMA because fac_list and crycb need
  * 31bit addresses in the sie control block.
  */
 struct sie_page2 {
 	__u64 fac_list[S390_ARCH_FAC_LIST_SIZE_U64];	/* 0x0000 */
 	struct kvm_s390_crypto_cb crycb;		/* 0x0800 */
 	u8 reserved900[0x1000 - 0x900];			/* 0x0900 */
 } __packed;

 struct kvm_arch{
 	void *sca;
 	int use_esca;
 	rwlock_t sca_lock;
 	debug_info_t *dbf;
 	struct kvm_s390_float_interrupt float_int;
 	struct kvm_device *flic;
 	struct gmap *gmap;
 	unsigned long mem_limit;
 	int css_support;
 	int use_irqchip;
 	int use_cmma;
 	int user_cpu_state_ctrl;
 	int user_sigp;
 	int user_stsi;
 	struct s390_io_adapter *adapters[MAX_S390_IO_ADAPTERS];
 	wait_queue_head_t ipte_wq;
 	int ipte_lock_count;
 	struct mutex ipte_mutex;
 	struct ratelimit_state sthyi_limit;
 	spinlock_t start_stop_lock;
 	struct sie_page2 *sie_page2;
 	struct kvm_s390_cpu_model model;
 	struct kvm_s390_crypto crypto;
 	u64 epoch;
 	/* subset of available cpu features enabled by user space */
 	DECLARE_BITMAP(cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS);
 };

 #define KVM_HVA_ERR_BAD		(-1UL)
 #define KVM_HVA_ERR_RO_BAD	(-2UL)

 static inline bool kvm_is_error_hva(unsigned long addr)
 {
 	return IS_ERR_VALUE(addr);
 }

 #define ASYNC_PF_PER_VCPU	64
 struct kvm_arch_async_pf {
 	unsigned long pfault_token;
 };

 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu);

 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
 			       struct kvm_async_pf *work);

 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
 				     struct kvm_async_pf *work);

 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
 				 struct kvm_async_pf *work);

 extern int sie64a(struct kvm_s390_sie_block *, u64 *);
 extern char sie_exit;

 static inline void kvm_arch_hardware_disable(void) {}
 static inline void kvm_arch_check_processor_compat(void *rtn) {}
 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
 static inline void kvm_arch_free_memslot(struct kvm *kvm,
 		struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {}
 static inline void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) {}
 static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
 static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 		struct kvm_memory_slot *slot) {}
 static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
 static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}

 void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu);

 #endif
	/*
	* definition for kernel virtual machines on s390
	*
	* Copyright IBM Corp. 2008, 2009
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License (version 2 only)
	* as published by the Free Software Foundation.
	*
	* Author(s): Carsten Otte <cotte@de.ibm.com>
	*/


	#ifndef ASM_KVM_HOST_H
	#define ASM_KVM_HOST_H

	#include <linux/types.h>
	#include <linux/hrtimer.h>
	#include <linux/interrupt.h>
	#include <linux/kvm_types.h>
	#include <linux/kvm_host.h>
	#include <linux/kvm.h>
	#include <linux/seqlock.h>
	#include <asm/debug.h>
	#include <asm/cpu.h>
	#include <asm/fpu/api.h>
	#include <asm/isc.h>

	#define KVM_S390_BSCA_CPU_SLOTS 64
	#define KVM_S390_ESCA_CPU_SLOTS 248
	#define KVM_MAX_VCPUS KVM_S390_ESCA_CPU_SLOTS
	#define KVM_USER_MEM_SLOTS 32

	/*
	* These seem to be used for allocating ->chip in the routing table,
	* which we don't use. 4096 is an out-of-thin-air value. If we need
	* to look at ->chip later on, we'll need to revisit this.
	*/
	#define KVM_NR_IRQCHIPS 1
	#define KVM_IRQCHIP_NUM_PINS 4096
	#define KVM_HALT_POLL_NS_DEFAULT 80000

	/* s390-specific vcpu->requests bit members */
	#define KVM_REQ_ENABLE_IBS 8
	#define KVM_REQ_DISABLE_IBS 9

	#define SIGP_CTRL_C 0x80
	#define SIGP_CTRL_SCN_MASK 0x3f

	union bsca_sigp_ctrl {
	__u8 value;
	struct {
	__u8 c : 1;
	__u8 r : 1;
	__u8 scn : 6;
	};
	} __packed;

	union esca_sigp_ctrl {
	__u16 value;
	struct {
	__u8 c : 1;
	__u8 reserved: 7;
	__u8 scn;
	};
	} __packed;

	struct esca_entry {
	union esca_sigp_ctrl sigp_ctrl;
	__u16 reserved1[3];
	__u64 sda;
	__u64 reserved2[6];
	} __packed;

	struct bsca_entry {
	__u8 reserved0;
	union bsca_sigp_ctrl sigp_ctrl;
	__u16 reserved[3];
	__u64 sda;
	__u64 reserved2[2];
	} __attribute__((packed));

	union ipte_control {
	unsigned long val;
	struct {
	unsigned long k : 1;
	unsigned long kh : 31;
	unsigned long kg : 32;
	};
	};

	struct bsca_block {
	union ipte_control ipte_control;
	__u64 reserved[5];
	__u64 mcn;
	__u64 reserved2;
	struct bsca_entry cpu[KVM_S390_BSCA_CPU_SLOTS];
	} __attribute__((packed));

	struct esca_block {
	union ipte_control ipte_control;
	__u64 reserved1[7];
	__u64 mcn[4];
	__u64 reserved2[20];
	struct esca_entry cpu[KVM_S390_ESCA_CPU_SLOTS];
	} __packed;

	#define CPUSTAT_STOPPED 0x80000000
	#define CPUSTAT_WAIT 0x10000000
	#define CPUSTAT_ECALL_PEND 0x08000000
	#define CPUSTAT_STOP_INT 0x04000000
	#define CPUSTAT_IO_INT 0x02000000
	#define CPUSTAT_EXT_INT 0x01000000
	#define CPUSTAT_RUNNING 0x00800000
	#define CPUSTAT_RETAINED 0x00400000
	#define CPUSTAT_TIMING_SUB 0x00020000
	#define CPUSTAT_SIE_SUB 0x00010000
	#define CPUSTAT_RRF 0x00008000
	#define CPUSTAT_SLSV 0x00004000
	#define CPUSTAT_SLSR 0x00002000
	#define CPUSTAT_ZARCH 0x00000800
	#define CPUSTAT_MCDS 0x00000100
	#define CPUSTAT_SM 0x00000080
	#define CPUSTAT_IBS 0x00000040
	#define CPUSTAT_GED2 0x00000010
	#define CPUSTAT_G 0x00000008
	#define CPUSTAT_GED 0x00000004
	#define CPUSTAT_J 0x00000002
	#define CPUSTAT_P 0x00000001

	struct kvm_s390_sie_block {
	atomic_t cpuflags; /* 0x0000 */
	__u32 : 1; /* 0x0004 */
	__u32 prefix : 18;
	__u32 : 1;
	__u32 ibc : 12;
	__u8 reserved08[4]; /* 0x0008 */
	#define PROG_IN_SIE (1<<0)
	__u32 prog0c; /* 0x000c */
	__u8 reserved10[16]; /* 0x0010 */
	#define PROG_BLOCK_SIE (1<<0)
	#define PROG_REQUEST (1<<1)
	atomic_t prog20; /* 0x0020 */
	__u8 reserved24[4]; /* 0x0024 */
	__u64 cputm; /* 0x0028 */
	__u64 ckc; /* 0x0030 */
	__u64 epoch; /* 0x0038 */
	__u8 reserved40[4]; /* 0x0040 */
	#define LCTL_CR0 0x8000
	#define LCTL_CR6 0x0200
	#define LCTL_CR9 0x0040
	#define LCTL_CR10 0x0020
	#define LCTL_CR11 0x0010
	#define LCTL_CR14 0x0002
	__u16 lctl; /* 0x0044 */
	__s16 icpua; /* 0x0046 */
	#define ICTL_OPEREXC 0x80000000
	#define ICTL_PINT 0x20000000
	#define ICTL_LPSW 0x00400000
	#define ICTL_STCTL 0x00040000
	#define ICTL_ISKE 0x00004000
	#define ICTL_SSKE 0x00002000
	#define ICTL_RRBE 0x00001000
	#define ICTL_TPROT 0x00000200
	__u32 ictl; /* 0x0048 */
	__u32 eca; /* 0x004c */
	#define ICPT_INST 0x04
	#define ICPT_PROGI 0x08
	#define ICPT_INSTPROGI 0x0C
	#define ICPT_OPEREXC 0x2C
	#define ICPT_PARTEXEC 0x38
	#define ICPT_IOINST 0x40
	__u8 icptcode; /* 0x0050 */
	__u8 icptstatus; /* 0x0051 */
	__u16 ihcpu; /* 0x0052 */
	__u8 reserved54[2]; /* 0x0054 */
	__u16 ipa; /* 0x0056 */
	__u32 ipb; /* 0x0058 */
	__u32 scaoh; /* 0x005c */
	__u8 reserved60; /* 0x0060 */
	__u8 ecb; /* 0x0061 */
	__u8 ecb2; /* 0x0062 */
	#define ECB3_AES 0x04
	#define ECB3_DEA 0x08
	__u8 ecb3; /* 0x0063 */
	__u32 scaol; /* 0x0064 */
	__u8 reserved68[4]; /* 0x0068 */
	__u32 todpr; /* 0x006c */
	__u8 reserved70[32]; /* 0x0070 */
	psw_t gpsw; /* 0x0090 */
	__u64 gg14; /* 0x00a0 */
	__u64 gg15; /* 0x00a8 */
	__u8 reservedb0[20]; /* 0x00b0 */
	__u16 extcpuaddr; /* 0x00c4 */
	__u16 eic; /* 0x00c6 */
	__u32 reservedc8; /* 0x00c8 */
	__u16 pgmilc; /* 0x00cc */
	__u16 iprcc; /* 0x00ce */
	__u32 dxc; /* 0x00d0 */
	__u16 mcn; /* 0x00d4 */
	__u8 perc; /* 0x00d6 */
	__u8 peratmid; /* 0x00d7 */
	__u64 peraddr; /* 0x00d8 */
	__u8 eai; /* 0x00e0 */
	__u8 peraid; /* 0x00e1 */
	__u8 oai; /* 0x00e2 */
	__u8 armid; /* 0x00e3 */
	__u8 reservede4[4]; /* 0x00e4 */
	__u64 tecmc; /* 0x00e8 */
	__u8 reservedf0[12]; /* 0x00f0 */
	#define CRYCB_FORMAT1 0x00000001
	#define CRYCB_FORMAT2 0x00000003
	__u32 crycbd; /* 0x00fc */
	__u64 gcr[16]; /* 0x0100 */
	__u64 gbea; /* 0x0180 */
	__u8 reserved188[24]; /* 0x0188 */
	__u32 fac; /* 0x01a0 */
	__u8 reserved1a4[20]; /* 0x01a4 */
	__u64 cbrlo; /* 0x01b8 */
	__u8 reserved1c0[8]; /* 0x01c0 */
	__u32 ecd; /* 0x01c8 */
	__u8 reserved1cc[18]; /* 0x01cc */
	__u64 pp; /* 0x01de */
	__u8 reserved1e6[2]; /* 0x01e6 */
	__u64 itdba; /* 0x01e8 */
	__u64 riccbd; /* 0x01f0 */
	__u8 reserved1f8[8]; /* 0x01f8 */
	} __attribute__((packed));

	struct kvm_s390_itdb {
	__u8 data[256];
	} __packed;

	struct sie_page {
	struct kvm_s390_sie_block sie_block;
	__u8 reserved200[1024]; /* 0x0200 */
	struct kvm_s390_itdb itdb; /* 0x0600 */
	__u8 reserved700[2304]; /* 0x0700 */
	} __packed;

	struct kvm_vcpu_stat {
	u32 exit_userspace;
	u32 exit_null;
	u32 exit_external_request;
	u32 exit_external_interrupt;
	u32 exit_stop_request;
	u32 exit_validity;
	u32 exit_instruction;
	u32 halt_successful_poll;
	u32 halt_attempted_poll;
	u32 halt_poll_invalid;
	u32 halt_wakeup;
	u32 instruction_lctl;
	u32 instruction_lctlg;
	u32 instruction_stctl;
	u32 instruction_stctg;
	u32 exit_program_interruption;
	u32 exit_instr_and_program;
	u32 exit_operation_exception;
	u32 deliver_external_call;
	u32 deliver_emergency_signal;
	u32 deliver_service_signal;
	u32 deliver_virtio_interrupt;
	u32 deliver_stop_signal;
	u32 deliver_prefix_signal;
	u32 deliver_restart_signal;
	u32 deliver_program_int;
	u32 deliver_io_int;
	u32 exit_wait_state;
	u32 instruction_pfmf;
	u32 instruction_stidp;
	u32 instruction_spx;
	u32 instruction_stpx;
	u32 instruction_stap;
	u32 instruction_storage_key;
	u32 instruction_ipte_interlock;
	u32 instruction_stsch;
	u32 instruction_chsc;
	u32 instruction_stsi;
	u32 instruction_stfl;
	u32 instruction_tprot;
	u32 instruction_essa;
	u32 instruction_sthyi;
	u32 instruction_sigp_sense;
	u32 instruction_sigp_sense_running;
	u32 instruction_sigp_external_call;
	u32 instruction_sigp_emergency;
	u32 instruction_sigp_cond_emergency;
	u32 instruction_sigp_start;
	u32 instruction_sigp_stop;
	u32 instruction_sigp_stop_store_status;
	u32 instruction_sigp_store_status;
	u32 instruction_sigp_store_adtl_status;
	u32 instruction_sigp_arch;
	u32 instruction_sigp_prefix;
	u32 instruction_sigp_restart;
	u32 instruction_sigp_init_cpu_reset;
	u32 instruction_sigp_cpu_reset;
	u32 instruction_sigp_unknown;
	u32 diagnose_10;
	u32 diagnose_44;
	u32 diagnose_9c;
	u32 diagnose_258;
	u32 diagnose_308;
	u32 diagnose_500;
	};

	#define PGM_OPERATION 0x01
	#define PGM_PRIVILEGED_OP 0x02
	#define PGM_EXECUTE 0x03
	#define PGM_PROTECTION 0x04
	#define PGM_ADDRESSING 0x05
	#define PGM_SPECIFICATION 0x06
	#define PGM_DATA 0x07
	#define PGM_FIXED_POINT_OVERFLOW 0x08
	#define PGM_FIXED_POINT_DIVIDE 0x09
	#define PGM_DECIMAL_OVERFLOW 0x0a
	#define PGM_DECIMAL_DIVIDE 0x0b
	#define PGM_HFP_EXPONENT_OVERFLOW 0x0c
	#define PGM_HFP_EXPONENT_UNDERFLOW 0x0d
	#define PGM_HFP_SIGNIFICANCE 0x0e
	#define PGM_HFP_DIVIDE 0x0f
	#define PGM_SEGMENT_TRANSLATION 0x10
	#define PGM_PAGE_TRANSLATION 0x11
	#define PGM_TRANSLATION_SPEC 0x12
	#define PGM_SPECIAL_OPERATION 0x13
	#define PGM_OPERAND 0x15
	#define PGM_TRACE_TABEL 0x16
	#define PGM_VECTOR_PROCESSING 0x1b
	#define PGM_SPACE_SWITCH 0x1c
	#define PGM_HFP_SQUARE_ROOT 0x1d
	#define PGM_PC_TRANSLATION_SPEC 0x1f
	#define PGM_AFX_TRANSLATION 0x20
	#define PGM_ASX_TRANSLATION 0x21
	#define PGM_LX_TRANSLATION 0x22
	#define PGM_EX_TRANSLATION 0x23
	#define PGM_PRIMARY_AUTHORITY 0x24
	#define PGM_SECONDARY_AUTHORITY 0x25
	#define PGM_LFX_TRANSLATION 0x26
	#define PGM_LSX_TRANSLATION 0x27
	#define PGM_ALET_SPECIFICATION 0x28
	#define PGM_ALEN_TRANSLATION 0x29
	#define PGM_ALE_SEQUENCE 0x2a
	#define PGM_ASTE_VALIDITY 0x2b
	#define PGM_ASTE_SEQUENCE 0x2c
	#define PGM_EXTENDED_AUTHORITY 0x2d
	#define PGM_LSTE_SEQUENCE 0x2e
	#define PGM_ASTE_INSTANCE 0x2f
	#define PGM_STACK_FULL 0x30
	#define PGM_STACK_EMPTY 0x31
	#define PGM_STACK_SPECIFICATION 0x32
	#define PGM_STACK_TYPE 0x33
	#define PGM_STACK_OPERATION 0x34
	#define PGM_ASCE_TYPE 0x38
	#define PGM_REGION_FIRST_TRANS 0x39
	#define PGM_REGION_SECOND_TRANS 0x3a
	#define PGM_REGION_THIRD_TRANS 0x3b
	#define PGM_MONITOR 0x40
	#define PGM_PER 0x80
	#define PGM_CRYPTO_OPERATION 0x119

	/* irq types in order of priority */
	enum irq_types {
	IRQ_PEND_MCHK_EX = 0,
	IRQ_PEND_SVC,
	IRQ_PEND_PROG,
	IRQ_PEND_MCHK_REP,
	IRQ_PEND_EXT_IRQ_KEY,
	IRQ_PEND_EXT_MALFUNC,
	IRQ_PEND_EXT_EMERGENCY,
	IRQ_PEND_EXT_EXTERNAL,
	IRQ_PEND_EXT_CLOCK_COMP,
	IRQ_PEND_EXT_CPU_TIMER,
	IRQ_PEND_EXT_TIMING,
	IRQ_PEND_EXT_SERVICE,
	IRQ_PEND_EXT_HOST,
	IRQ_PEND_PFAULT_INIT,
	IRQ_PEND_PFAULT_DONE,
	IRQ_PEND_VIRTIO,
	IRQ_PEND_IO_ISC_0,
	IRQ_PEND_IO_ISC_1,
	IRQ_PEND_IO_ISC_2,
	IRQ_PEND_IO_ISC_3,
	IRQ_PEND_IO_ISC_4,
	IRQ_PEND_IO_ISC_5,
	IRQ_PEND_IO_ISC_6,
	IRQ_PEND_IO_ISC_7,
	IRQ_PEND_SIGP_STOP,
	IRQ_PEND_RESTART,
	IRQ_PEND_SET_PREFIX,
	IRQ_PEND_COUNT
	};

	/* We have 2M for virtio device descriptor pages. Smallest amount of
	* memory per page is 24 bytes (1 queue), so (2048*1024) / 24 = 87381
	*/
	#define KVM_S390_MAX_VIRTIO_IRQS 87381

	/*
	* Repressible (non-floating) machine check interrupts
	* subclass bits in MCIC
	*/
	#define MCHK_EXTD_BIT 58
	#define MCHK_DEGR_BIT 56
	#define MCHK_WARN_BIT 55
	#define MCHK_REP_MASK ((1UL << MCHK_DEGR_BIT) \| \
	(1UL << MCHK_EXTD_BIT) \| \
	(1UL << MCHK_WARN_BIT))

	/* Exigent machine check interrupts subclass bits in MCIC */
	#define MCHK_SD_BIT 63
	#define MCHK_PD_BIT 62
	#define MCHK_EX_MASK ((1UL << MCHK_SD_BIT) \| (1UL << MCHK_PD_BIT))

	#define IRQ_PEND_EXT_MASK ((1UL << IRQ_PEND_EXT_IRQ_KEY) \| \
	(1UL << IRQ_PEND_EXT_CLOCK_COMP) \| \
	(1UL << IRQ_PEND_EXT_CPU_TIMER) \| \
	(1UL << IRQ_PEND_EXT_MALFUNC) \| \
	(1UL << IRQ_PEND_EXT_EMERGENCY) \| \
	(1UL << IRQ_PEND_EXT_EXTERNAL) \| \
	(1UL << IRQ_PEND_EXT_TIMING) \| \
	(1UL << IRQ_PEND_EXT_HOST) \| \
	(1UL << IRQ_PEND_EXT_SERVICE) \| \
	(1UL << IRQ_PEND_VIRTIO) \| \
	(1UL << IRQ_PEND_PFAULT_INIT) \| \
	(1UL << IRQ_PEND_PFAULT_DONE))

	#define IRQ_PEND_IO_MASK ((1UL << IRQ_PEND_IO_ISC_0) \| \
	(1UL << IRQ_PEND_IO_ISC_1) \| \
	(1UL << IRQ_PEND_IO_ISC_2) \| \
	(1UL << IRQ_PEND_IO_ISC_3) \| \
	(1UL << IRQ_PEND_IO_ISC_4) \| \
	(1UL << IRQ_PEND_IO_ISC_5) \| \
	(1UL << IRQ_PEND_IO_ISC_6) \| \
	(1UL << IRQ_PEND_IO_ISC_7))

	#define IRQ_PEND_MCHK_MASK ((1UL << IRQ_PEND_MCHK_REP) \| \
	(1UL << IRQ_PEND_MCHK_EX))

	struct kvm_s390_interrupt_info {
	struct list_head list;
	u64 type;
	union {
	struct kvm_s390_io_info io;
	struct kvm_s390_ext_info ext;
	struct kvm_s390_pgm_info pgm;
	struct kvm_s390_emerg_info emerg;
	struct kvm_s390_extcall_info extcall;
	struct kvm_s390_prefix_info prefix;
	struct kvm_s390_stop_info stop;
	struct kvm_s390_mchk_info mchk;
	};
	};

	struct kvm_s390_irq_payload {
	struct kvm_s390_io_info io;
	struct kvm_s390_ext_info ext;
	struct kvm_s390_pgm_info pgm;
	struct kvm_s390_emerg_info emerg;
	struct kvm_s390_extcall_info extcall;
	struct kvm_s390_prefix_info prefix;
	struct kvm_s390_stop_info stop;
	struct kvm_s390_mchk_info mchk;
	};

	struct kvm_s390_local_interrupt {
	spinlock_t lock;
	struct kvm_s390_float_interrupt *float_int;
	struct swait_queue_head *wq;
	atomic_t *cpuflags;
	DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS);
	struct kvm_s390_irq_payload irq;
	unsigned long pending_irqs;
	};

	#define FIRQ_LIST_IO_ISC_0 0
	#define FIRQ_LIST_IO_ISC_1 1
	#define FIRQ_LIST_IO_ISC_2 2
	#define FIRQ_LIST_IO_ISC_3 3
	#define FIRQ_LIST_IO_ISC_4 4
	#define FIRQ_LIST_IO_ISC_5 5
	#define FIRQ_LIST_IO_ISC_6 6
	#define FIRQ_LIST_IO_ISC_7 7
	#define FIRQ_LIST_PFAULT 8
	#define FIRQ_LIST_VIRTIO 9
	#define FIRQ_LIST_COUNT 10
	#define FIRQ_CNTR_IO 0
	#define FIRQ_CNTR_SERVICE 1
	#define FIRQ_CNTR_VIRTIO 2
	#define FIRQ_CNTR_PFAULT 3
	#define FIRQ_MAX_COUNT 4

	struct kvm_s390_float_interrupt {
	unsigned long pending_irqs;
	spinlock_t lock;
	struct list_head lists[FIRQ_LIST_COUNT];
	int counters[FIRQ_MAX_COUNT];
	struct kvm_s390_mchk_info mchk;
	struct kvm_s390_ext_info srv_signal;
	int next_rr_cpu;
	unsigned long idle_mask[BITS_TO_LONGS(KVM_MAX_VCPUS)];
	};

	struct kvm_hw_wp_info_arch {
	unsigned long addr;
	unsigned long phys_addr;
	int len;
	char *old_data;
	};

	struct kvm_hw_bp_info_arch {
	unsigned long addr;
	int len;
	};

	/*
	* Only the upper 16 bits of kvm_guest_debug->control are arch specific.
	* Further KVM_GUESTDBG flags which an be used from userspace can be found in
	* arch/s390/include/uapi/asm/kvm.h
	*/
	#define KVM_GUESTDBG_EXIT_PENDING 0x10000000

	#define guestdbg_enabled(vcpu) \
	(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)
	#define guestdbg_sstep_enabled(vcpu) \
	(vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
	#define guestdbg_hw_bp_enabled(vcpu) \
	(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
	#define guestdbg_exit_pending(vcpu) (guestdbg_enabled(vcpu) && \
	(vcpu->guest_debug & KVM_GUESTDBG_EXIT_PENDING))

	struct kvm_guestdbg_info_arch {
	unsigned long cr0;
	unsigned long cr9;
	unsigned long cr10;
	unsigned long cr11;
	struct kvm_hw_bp_info_arch *hw_bp_info;
	struct kvm_hw_wp_info_arch *hw_wp_info;
	int nr_hw_bp;
	int nr_hw_wp;
	unsigned long last_bp;
	};

	struct kvm_vcpu_arch {
	struct kvm_s390_sie_block *sie_block;
	unsigned int host_acrs[NUM_ACRS];
	struct fpu host_fpregs;
	struct kvm_s390_local_interrupt local_int;
	struct hrtimer ckc_timer;
	struct kvm_s390_pgm_info pgm;
	struct gmap *gmap;
	struct kvm_guestdbg_info_arch guestdbg;
	unsigned long pfault_token;
	unsigned long pfault_select;
	unsigned long pfault_compare;
	bool cputm_enabled;
	/*
	* The seqcount protects updates to cputm_start and sie_block.cputm,
	* this way we can have non-blocking reads with consistent values.
	* Only the owning VCPU thread (vcpu->cpu) is allowed to change these
	* values and to start/stop/enable/disable cpu timer accounting.
	*/
	seqcount_t cputm_seqcount;
	__u64 cputm_start;
	};

	struct kvm_vm_stat {
	u32 remote_tlb_flush;
	};

	struct kvm_arch_memory_slot {
	};

	struct s390_map_info {
	struct list_head list;
	__u64 guest_addr;
	__u64 addr;
	struct page *page;
	};

	struct s390_io_adapter {
	unsigned int id;
	int isc;
	bool maskable;
	bool masked;
	bool swap;
	struct rw_semaphore maps_lock;
	struct list_head maps;
	atomic_t nr_maps;
	};

	#define MAX_S390_IO_ADAPTERS ((MAX_ISC + 1) * 8)
	#define MAX_S390_ADAPTER_MAPS 256

	/* maximum size of facilities and facility mask is 2k bytes */
	#define S390_ARCH_FAC_LIST_SIZE_BYTE (1<<11)
	#define S390_ARCH_FAC_LIST_SIZE_U64 \
	(S390_ARCH_FAC_LIST_SIZE_BYTE / sizeof(u64))
	#define S390_ARCH_FAC_MASK_SIZE_BYTE S390_ARCH_FAC_LIST_SIZE_BYTE
	#define S390_ARCH_FAC_MASK_SIZE_U64 \
	(S390_ARCH_FAC_MASK_SIZE_BYTE / sizeof(u64))

	struct kvm_s390_cpu_model {
	/* facility mask supported by kvm & hosting machine */
	__u64 fac_mask[S390_ARCH_FAC_LIST_SIZE_U64];
	/* facility list requested by guest (in dma page) */
	__u64 *fac_list;
	u64 cpuid;
	unsigned short ibc;
	};

	struct kvm_s390_crypto {
	struct kvm_s390_crypto_cb *crycb;
	__u32 crycbd;
	__u8 aes_kw;
	__u8 dea_kw;
	};

	struct kvm_s390_crypto_cb {
	__u8 reserved00[72]; /* 0x0000 */
	__u8 dea_wrapping_key_mask[24]; /* 0x0048 */
	__u8 aes_wrapping_key_mask[32]; /* 0x0060 */
	__u8 reserved80[128]; /* 0x0080 */
	};

	/*
	* sie_page2 has to be allocated as DMA because fac_list and crycb need
	* 31bit addresses in the sie control block.
	*/
	struct sie_page2 {
	__u64 fac_list[S390_ARCH_FAC_LIST_SIZE_U64]; /* 0x0000 */
	struct kvm_s390_crypto_cb crycb; /* 0x0800 */
	u8 reserved900[0x1000 - 0x900]; /* 0x0900 */
	} __packed;

	struct kvm_arch{
	void *sca;
	int use_esca;
	rwlock_t sca_lock;
	debug_info_t *dbf;
	struct kvm_s390_float_interrupt float_int;
	struct kvm_device *flic;
	struct gmap *gmap;
	unsigned long mem_limit;
	int css_support;
	int use_irqchip;
	int use_cmma;
	int user_cpu_state_ctrl;
	int user_sigp;
	int user_stsi;
	struct s390_io_adapter *adapters[MAX_S390_IO_ADAPTERS];
	wait_queue_head_t ipte_wq;
	int ipte_lock_count;
	struct mutex ipte_mutex;
	struct ratelimit_state sthyi_limit;
	spinlock_t start_stop_lock;
	struct sie_page2 *sie_page2;
	struct kvm_s390_cpu_model model;
	struct kvm_s390_crypto crypto;
	u64 epoch;
	/* subset of available cpu features enabled by user space */
	DECLARE_BITMAP(cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS);
	};

	#define KVM_HVA_ERR_BAD (-1UL)
	#define KVM_HVA_ERR_RO_BAD (-2UL)

	static inline bool kvm_is_error_hva(unsigned long addr)
	{
	return IS_ERR_VALUE(addr);
	}

	#define ASYNC_PF_PER_VCPU 64
	struct kvm_arch_async_pf {
	unsigned long pfault_token;
	};

	bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu);

	void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
	struct kvm_async_pf *work);

	void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
	struct kvm_async_pf *work);

	void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
	struct kvm_async_pf *work);

	extern int sie64a(struct kvm_s390_sie_block , u64 );
	extern char sie_exit;

	static inline void kvm_arch_hardware_disable(void) {}
	static inline void kvm_arch_check_processor_compat(void *rtn) {}
	static inline void kvm_arch_sync_events(struct kvm *kvm) {}
	static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
	static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
	static inline void kvm_arch_free_memslot(struct kvm *kvm,
	struct kvm_memory_slot free, struct kvm_memory_slot dont) {}
	static inline void kvm_arch_memslots_updated(struct kvm kvm, struct kvm_memslots slots) {}
	static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
	static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
	struct kvm_memory_slot *slot) {}
	static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
	static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}

	void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu);

	#endif