/* SPDX-License-Identifier: GPL-2.0 */
/*
 * definition for kernel virtual machines on s390
 *
 * Copyright IBM Corp. 2008, 2018
 *
 *    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 <linux/module.h>
#include <asm/debug.h>
#include <asm/cpu.h>
#include <asm/fpu/api.h>
#include <asm/isc.h>
#include <asm/guarded_storage.h>

#define KVM_S390_BSCA_CPU_SLOTS 64
#define KVM_S390_ESCA_CPU_SLOTS 248
#define KVM_MAX_VCPUS 255

/*
 * These seem to be used for allocating ->chip in the routing table, which we
 * don't use. 1 is as small as we can get to reduce the needed memory. 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 1
#define KVM_HALT_POLL_NS_DEFAULT 50000

/* s390-specific vcpu->requests bit members */
#define KVM_REQ_ENABLE_IBS      KVM_ARCH_REQ(0)
#define KVM_REQ_DISABLE_IBS     KVM_ARCH_REQ(1)
#define KVM_REQ_ICPT_OPEREXC    KVM_ARCH_REQ(2)
#define KVM_REQ_START_MIGRATION KVM_ARCH_REQ(3)
#define KVM_REQ_STOP_MIGRATION  KVM_ARCH_REQ(4)
#define KVM_REQ_VSIE_RESTART    KVM_ARCH_REQ(5)

#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;
        };
};

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

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

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

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];
};

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];
};

/*
 * This struct is used to store some machine check info from lowcore
 * for machine checks that happen while the guest is running.
 * This info in host's lowcore might be overwritten by a second machine
 * check from host when host is in the machine check's high-level handling.
 * The size is 24 bytes.
 */
struct mcck_volatile_info {
        __u64 mcic;
        __u64 failing_storage_address;
        __u32 ext_damage_code;
        __u32 reserved;
};

#define CR0_INITIAL_MASK (CR0_UNUSED_56 | CR0_INTERRUPT_KEY_SUBMASK | \
                          CR0_MEASUREMENT_ALERT_SUBMASK)
#define CR14_INITIAL_MASK (CR14_UNUSED_32 | CR14_UNUSED_33 | \
                           CR14_EXTERNAL_DAMAGE_SUBMASK)

#define SIDAD_SIZE_MASK         0xff
#define sida_origin(sie_block) \
        ((sie_block)->sidad & PAGE_MASK)
#define sida_size(sie_block) \
        ((((sie_block)->sidad & SIDAD_SIZE_MASK) + 1) * PAGE_SIZE)

#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_KSS        0x00000200
#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 */
        union {
                __u8    reserved10[16];         /* 0x0010 */
                struct {
                        __u64   pv_handle_cpu;
                        __u64   pv_handle_config;
                };
        };
#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 */
        __u32   svcc;                   /* 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 */
#define ECA_CEI         0x80000000
#define ECA_IB          0x40000000
#define ECA_SIGPI       0x10000000
#define ECA_MVPGI       0x01000000
#define ECA_AIV         0x00200000
#define ECA_VX          0x00020000
#define ECA_PROTEXCI    0x00002000
#define ECA_APIE        0x00000008
#define ECA_SII         0x00000001
        __u32   eca;                    /* 0x004c */
#define ICPT_INST       0x04
#define ICPT_PROGI      0x08
#define ICPT_INSTPROGI  0x0C
#define ICPT_EXTREQ     0x10
#define ICPT_EXTINT     0x14
#define ICPT_IOREQ      0x18
#define ICPT_WAIT       0x1c
#define ICPT_VALIDITY   0x20
#define ICPT_STOP       0x28
#define ICPT_OPEREXC    0x2C
#define ICPT_PARTEXEC   0x38
#define ICPT_IOINST     0x40
#define ICPT_KSS        0x5c
#define ICPT_MCHKREQ    0x60
#define ICPT_INT_ENABLE 0x64
#define ICPT_PV_INSTR   0x68
#define ICPT_PV_NOTIFY  0x6c
#define ICPT_PV_PREF    0x70
        __u8    icptcode;               /* 0x0050 */
        __u8    icptstatus;             /* 0x0051 */
        __u16   ihcpu;                  /* 0x0052 */
        __u8    reserved54;             /* 0x0054 */
#define IICTL_CODE_NONE          0x00
#define IICTL_CODE_MCHK          0x01
#define IICTL_CODE_EXT           0x02
#define IICTL_CODE_IO            0x03
#define IICTL_CODE_RESTART       0x04
#define IICTL_CODE_SPECIFICATION 0x10
#define IICTL_CODE_OPERAND       0x11
        __u8    iictl;                  /* 0x0055 */
        __u16   ipa;                    /* 0x0056 */
        __u32   ipb;                    /* 0x0058 */
        __u32   scaoh;                  /* 0x005c */
#define FPF_BPBC        0x20
        __u8    fpf;                    /* 0x0060 */
#define ECB_GS          0x40
#define ECB_TE          0x10
#define ECB_SPECI       0x08
#define ECB_SRSI        0x04
#define ECB_HOSTPROTINT 0x02
        __u8    ecb;                    /* 0x0061 */
#define ECB2_CMMA       0x80
#define ECB2_IEP        0x20
#define ECB2_PFMFI      0x08
#define ECB2_ESCA       0x04
        __u8    ecb2;                   /* 0x0062 */
#define ECB3_DEA 0x08
#define ECB3_AES 0x04
#define ECB3_RI  0x01
        __u8    ecb3;                   /* 0x0063 */
        __u32   scaol;                  /* 0x0064 */
        __u8    sdf;                    /* 0x0068 */
        __u8    epdx;                   /* 0x0069 */
        __u8    cpnc;                   /* 0x006a */
        __u8    reserved6b;             /* 0x006b */
        __u32   todpr;                  /* 0x006c */
#define GISA_FORMAT1 0x00000001
        __u32   gd;                     /* 0x0070 */
        __u8    reserved74[12];         /* 0x0074 */
        __u64   mso;                    /* 0x0080 */
        __u64   msl;                    /* 0x0088 */
        psw_t   gpsw;                   /* 0x0090 */
        __u64   gg14;                   /* 0x00a0 */
        __u64   gg15;                   /* 0x00a8 */
        __u8    reservedb0[8];          /* 0x00b0 */
#define HPID_KVM        0x4
#define HPID_VSIE       0x5
        __u8    hpid;                   /* 0x00b8 */
        __u8    reservedb9[7];          /* 0x00b9 */
        union {
                struct {
                        __u32   eiparams;       /* 0x00c0 */
                        __u16   extcpuaddr;     /* 0x00c4 */
                        __u16   eic;            /* 0x00c6 */
                };
                __u64   mcic;                   /* 0x00c0 */
        } __packed;
        __u32   reservedc8;             /* 0x00c8 */
        union {
                struct {
                        __u16   pgmilc;         /* 0x00cc */
                        __u16   iprcc;          /* 0x00ce */
                };
                __u32   edc;                    /* 0x00cc */
        } __packed;
        union {
                struct {
                        __u32   dxc;            /* 0x00d0 */
                        __u16   mcn;            /* 0x00d4 */
                        __u8    perc;           /* 0x00d6 */
                        __u8    peratmid;       /* 0x00d7 */
                };
                __u64   faddr;                  /* 0x00d0 */
        } __packed;
        __u64   peraddr;                /* 0x00d8 */
        __u8    eai;                    /* 0x00e0 */
        __u8    peraid;                 /* 0x00e1 */
        __u8    oai;                    /* 0x00e2 */
        __u8    armid;                  /* 0x00e3 */
        __u8    reservede4[4];          /* 0x00e4 */
        union {
                __u64   tecmc;          /* 0x00e8 */
                struct {
                        __u16   subchannel_id;  /* 0x00e8 */
                        __u16   subchannel_nr;  /* 0x00ea */
                        __u32   io_int_parm;    /* 0x00ec */
                        __u32   io_int_word;    /* 0x00f0 */
                };
        } __packed;
        __u8    reservedf4[8];          /* 0x00f4 */
#define CRYCB_FORMAT_MASK 0x00000003
#define CRYCB_FORMAT0 0x00000000
#define CRYCB_FORMAT1 0x00000001
#define CRYCB_FORMAT2 0x00000003
        __u32   crycbd;                 /* 0x00fc */
        __u64   gcr[16];                /* 0x0100 */
        union {
                __u64   gbea;           /* 0x0180 */
                __u64   sidad;
        };
        __u8    reserved188[8];         /* 0x0188 */
        __u64   sdnxo;                  /* 0x0190 */
        __u8    reserved198[8];         /* 0x0198 */
        __u32   fac;                    /* 0x01a0 */
        __u8    reserved1a4[20];        /* 0x01a4 */
        __u64   cbrlo;                  /* 0x01b8 */
        __u8    reserved1c0[8];         /* 0x01c0 */
#define ECD_HOSTREGMGMT 0x20000000
#define ECD_MEF         0x08000000
#define ECD_ETOKENF     0x02000000
#define ECD_ECC         0x00200000
        __u32   ecd;                    /* 0x01c8 */
        __u8    reserved1cc[18];        /* 0x01cc */
        __u64   pp;                     /* 0x01de */
        __u8    reserved1e6[2];         /* 0x01e6 */
        __u64   itdba;                  /* 0x01e8 */
        __u64   riccbd;                 /* 0x01f0 */
        __u64   gvrd;                   /* 0x01f8 */
} __packed __aligned(512);

struct kvm_s390_itdb {
        __u8    data[256];
};

struct sie_page {
        struct kvm_s390_sie_block sie_block;
        struct mcck_volatile_info mcck_info;    /* 0x0200 */
        __u8 reserved218[360];          /* 0x0218 */
        __u64 pv_grregs[16];            /* 0x0380 */
        __u8 reserved400[512];          /* 0x0400 */
        struct kvm_s390_itdb itdb;      /* 0x0600 */
        __u8 reserved700[2304];         /* 0x0700 */
};

struct kvm_vcpu_stat {
        struct kvm_vcpu_stat_generic generic;
        u64 exit_userspace;
        u64 exit_null;
        u64 exit_external_request;
        u64 exit_io_request;
        u64 exit_external_interrupt;
        u64 exit_stop_request;
        u64 exit_validity;
        u64 exit_instruction;
        u64 exit_pei;
        u64 halt_no_poll_steal;
        u64 instruction_lctl;
        u64 instruction_lctlg;
        u64 instruction_stctl;
        u64 instruction_stctg;
        u64 exit_program_interruption;
        u64 exit_instr_and_program;
        u64 exit_operation_exception;
        u64 deliver_ckc;
        u64 deliver_cputm;
        u64 deliver_external_call;
        u64 deliver_emergency_signal;
        u64 deliver_service_signal;
        u64 deliver_virtio;
        u64 deliver_stop_signal;
        u64 deliver_prefix_signal;
        u64 deliver_restart_signal;
        u64 deliver_program;
        u64 deliver_io;
        u64 deliver_machine_check;
        u64 exit_wait_state;
        u64 inject_ckc;
        u64 inject_cputm;
        u64 inject_external_call;
        u64 inject_emergency_signal;
        u64 inject_mchk;
        u64 inject_pfault_init;
        u64 inject_program;
        u64 inject_restart;
        u64 inject_set_prefix;
        u64 inject_stop_signal;
        u64 instruction_epsw;
        u64 instruction_gs;
        u64 instruction_io_other;
        u64 instruction_lpsw;
        u64 instruction_lpswe;
        u64 instruction_pfmf;
        u64 instruction_ptff;
        u64 instruction_sck;
        u64 instruction_sckpf;
        u64 instruction_stidp;
        u64 instruction_spx;
        u64 instruction_stpx;
        u64 instruction_stap;
        u64 instruction_iske;
        u64 instruction_ri;
        u64 instruction_rrbe;
        u64 instruction_sske;
        u64 instruction_ipte_interlock;
        u64 instruction_stsi;
        u64 instruction_stfl;
        u64 instruction_tb;
        u64 instruction_tpi;
        u64 instruction_tprot;
        u64 instruction_tsch;
        u64 instruction_sie;
        u64 instruction_essa;
        u64 instruction_sthyi;
        u64 instruction_sigp_sense;
        u64 instruction_sigp_sense_running;
        u64 instruction_sigp_external_call;
        u64 instruction_sigp_emergency;
        u64 instruction_sigp_cond_emergency;
        u64 instruction_sigp_start;
        u64 instruction_sigp_stop;
        u64 instruction_sigp_stop_store_status;
        u64 instruction_sigp_store_status;
        u64 instruction_sigp_store_adtl_status;
        u64 instruction_sigp_arch;
        u64 instruction_sigp_prefix;
        u64 instruction_sigp_restart;
        u64 instruction_sigp_init_cpu_reset;
        u64 instruction_sigp_cpu_reset;
        u64 instruction_sigp_unknown;
        u64 instruction_diagnose_10;
        u64 instruction_diagnose_44;
        u64 instruction_diagnose_9c;
        u64 diag_9c_ignored;
        u64 diag_9c_forward;
        u64 instruction_diagnose_258;
        u64 instruction_diagnose_308;
        u64 instruction_diagnose_500;
        u64 instruction_diagnose_other;
        u64 pfault_sync;
};

#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 ascend order of priorities */
enum irq_types {
        IRQ_PEND_SET_PREFIX = 0,
        IRQ_PEND_RESTART,
        IRQ_PEND_SIGP_STOP,
        IRQ_PEND_IO_ISC_7,
        IRQ_PEND_IO_ISC_6,
        IRQ_PEND_IO_ISC_5,
        IRQ_PEND_IO_ISC_4,
        IRQ_PEND_IO_ISC_3,
        IRQ_PEND_IO_ISC_2,
        IRQ_PEND_IO_ISC_1,
        IRQ_PEND_IO_ISC_0,
        IRQ_PEND_VIRTIO,
        IRQ_PEND_PFAULT_DONE,
        IRQ_PEND_PFAULT_INIT,
        IRQ_PEND_EXT_HOST,
        IRQ_PEND_EXT_SERVICE,
        IRQ_PEND_EXT_SERVICE_EV,
        IRQ_PEND_EXT_TIMING,
        IRQ_PEND_EXT_CPU_TIMER,
        IRQ_PEND_EXT_CLOCK_COMP,
        IRQ_PEND_EXT_EXTERNAL,
        IRQ_PEND_EXT_EMERGENCY,
        IRQ_PEND_EXT_MALFUNC,
        IRQ_PEND_EXT_IRQ_KEY,
        IRQ_PEND_MCHK_REP,
        IRQ_PEND_PROG,
        IRQ_PEND_SVC,
        IRQ_PEND_MCHK_EX,
        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_EXT_SERVICE_EV) | \
                           (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))

#define IRQ_PEND_EXT_II_MASK ((1UL << IRQ_PEND_EXT_CPU_TIMER)  | \
                              (1UL << IRQ_PEND_EXT_CLOCK_COMP) | \
                              (1UL << IRQ_PEND_EXT_EMERGENCY)  | \
                              (1UL << IRQ_PEND_EXT_EXTERNAL)   | \
                              (1UL << IRQ_PEND_EXT_SERVICE)    | \
                              (1UL << IRQ_PEND_EXT_SERVICE_EV))

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;
        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

/* mask the AIS mode for a given ISC */
#define AIS_MODE_MASK(isc) (0x80 >> isc)

#define KVM_S390_AIS_MODE_ALL    0
#define KVM_S390_AIS_MODE_SINGLE 1

struct kvm_s390_float_interrupt {
        unsigned long pending_irqs;
        unsigned long masked_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;
        struct mutex ais_lock;
        u8 simm;
        u8 nimm;
};

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))

#define KVM_GUESTDBG_VALID_MASK \
                (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP |\
                KVM_GUESTDBG_USE_HW_BP | 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_s390_pv_vcpu {
        u64 handle;
        unsigned long stor_base;
};

struct kvm_vcpu_arch {
        struct kvm_s390_sie_block *sie_block;
        /* if vsie is active, currently executed shadow sie control block */
        struct kvm_s390_sie_block *vsie_block;
        unsigned int      host_acrs[NUM_ACRS];
        struct gs_cb      *host_gscb;
        struct fpu        host_fpregs;
        struct kvm_s390_local_interrupt local_int;
        struct hrtimer    ckc_timer;
        struct kvm_s390_pgm_info pgm;
        struct gmap *gmap;
        /* backup location for the currently enabled gmap when scheduled out */
        struct gmap *enabled_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;
        bool gs_enabled;
        bool skey_enabled;
        struct kvm_s390_pv_vcpu pv;
        union diag318_info diag318_info;
};

struct kvm_vm_stat {
        struct kvm_vm_stat_generic generic;
        u64 inject_io;
        u64 inject_float_mchk;
        u64 inject_pfault_done;
        u64 inject_service_signal;
        u64 inject_virtio;
};

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;
        bool suppressible;
};

#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];
        struct kvm_s390_vm_cpu_subfunc subfuncs;
        /* facility list requested by guest (in dma page) */
        __u64 *fac_list;
        u64 cpuid;
        unsigned short ibc;
};

typedef int (*crypto_hook)(struct kvm_vcpu *vcpu);

struct kvm_s390_crypto {
        struct kvm_s390_crypto_cb *crycb;
        struct rw_semaphore pqap_hook_rwsem;
        crypto_hook *pqap_hook;
        __u32 crycbd;
        __u8 aes_kw;
        __u8 dea_kw;
        __u8 apie;
};

#define APCB0_MASK_SIZE 1
struct kvm_s390_apcb0 {
        __u64 apm[APCB0_MASK_SIZE];             /* 0x0000 */
        __u64 aqm[APCB0_MASK_SIZE];             /* 0x0008 */
        __u64 adm[APCB0_MASK_SIZE];             /* 0x0010 */
        __u64 reserved18;                       /* 0x0018 */
};

#define APCB1_MASK_SIZE 4
struct kvm_s390_apcb1 {
        __u64 apm[APCB1_MASK_SIZE];             /* 0x0000 */
        __u64 aqm[APCB1_MASK_SIZE];             /* 0x0020 */
        __u64 adm[APCB1_MASK_SIZE];             /* 0x0040 */
        __u64 reserved60[4];                    /* 0x0060 */
};

struct kvm_s390_crypto_cb {
        struct kvm_s390_apcb0 apcb0;            /* 0x0000 */
        __u8   reserved20[0x0048 - 0x0020];     /* 0x0020 */
        __u8   dea_wrapping_key_mask[24];       /* 0x0048 */
        __u8   aes_wrapping_key_mask[32];       /* 0x0060 */
        struct kvm_s390_apcb1 apcb1;            /* 0x0080 */
};

struct kvm_s390_gisa {
        union {
                struct { /* common to all formats */
                        u32 next_alert;
                        u8  ipm;
                        u8  reserved01[2];
                        u8  iam;
                };
                struct { /* format 0 */
                        u32 next_alert;
                        u8  ipm;
                        u8  reserved01;
                        u8  : 6;
                        u8  g : 1;
                        u8  c : 1;
                        u8  iam;
                        u8  reserved02[4];
                        u32 airq_count;
                } g0;
                struct { /* format 1 */
                        u32 next_alert;
                        u8  ipm;
                        u8  simm;
                        u8  nimm;
                        u8  iam;
                        u8  aism[8];
                        u8  : 6;
                        u8  g : 1;
                        u8  c : 1;
                        u8  reserved03[11];
                        u32 airq_count;
                } g1;
                struct {
                        u64 word[4];
                } u64;
        };
};

struct kvm_s390_gib {
        u32 alert_list_origin;
        u32 reserved01;
        u8:5;
        u8  nisc:3;
        u8  reserved03[3];
        u32 reserved04[5];
};

/*
 * sie_page2 has to be allocated as DMA because fac_list, crycb and
 * gisa 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 */
        struct kvm_s390_gisa gisa;                      /* 0x0900 */
        struct kvm *kvm;                                /* 0x0920 */
        u8 reserved928[0x1000 - 0x928];                 /* 0x0928 */
};

struct kvm_s390_vsie {
        struct mutex mutex;
        struct radix_tree_root addr_to_page;
        int page_count;
        int next;
        struct page *pages[KVM_MAX_VCPUS];
};

struct kvm_s390_gisa_iam {
        u8 mask;
        spinlock_t ref_lock;
        u32 ref_count[MAX_ISC + 1];
};

struct kvm_s390_gisa_interrupt {
        struct kvm_s390_gisa *origin;
        struct kvm_s390_gisa_iam alert;
        struct hrtimer timer;
        u64 expires;
        DECLARE_BITMAP(kicked_mask, KVM_MAX_VCPUS);
};

struct kvm_s390_pv {
        u64 handle;
        u64 guest_len;
        unsigned long stor_base;
        void *stor_var;
};

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 use_pfmfi;
        int use_skf;
        int user_cpu_state_ctrl;
        int user_sigp;
        int user_stsi;
        int user_instr0;
        struct s390_io_adapter *adapters[MAX_S390_IO_ADAPTERS];
        wait_queue_head_t ipte_wq;
        int ipte_lock_count;
        struct mutex ipte_mutex;
        spinlock_t start_stop_lock;
        struct sie_page2 *sie_page2;
        struct kvm_s390_cpu_model model;
        struct kvm_s390_crypto crypto;
        struct kvm_s390_vsie vsie;
        u8 epdx;
        u64 epoch;
        int migration_mode;
        atomic64_t cmma_dirty_pages;
        /* subset of available cpu features enabled by user space */
        DECLARE_BITMAP(cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS);
        /* indexed by vcpu_idx */
        DECLARE_BITMAP(idle_mask, KVM_MAX_VCPUS);
        struct kvm_s390_gisa_interrupt gisa_int;
        struct kvm_s390_pv pv;
};

#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_dequeue_async_page_present(struct kvm_vcpu *vcpu);

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

bool 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);

static inline void kvm_arch_async_page_present_queued(struct kvm_vcpu *vcpu) {}

void kvm_arch_crypto_clear_masks(struct kvm *kvm);
void kvm_arch_crypto_set_masks(struct kvm *kvm, unsigned long *apm,
                               unsigned long *aqm, unsigned long *adm);

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

extern int kvm_s390_gisc_register(struct kvm *kvm, u32 gisc);
extern int kvm_s390_gisc_unregister(struct kvm *kvm, u32 gisc);

static inline void kvm_arch_hardware_disable(void) {}
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
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 *slot) {}
static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
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