arch/s390/include/asm/kvm_host.h

root/arch/s390/include/asm/kvm_host.h
/* 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.h>
#include <linux/seqlock.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/mmu_notifier.h>
#include <asm/kvm_host_types.h>
#include <asm/debug.h>
#include <asm/cpu.h>
#include <asm/fpu.h>
#include <asm/isc.h>
#include <asm/guarded_storage.h>

#define KVM_HAVE_MMU_RWLOCK
#define KVM_MAX_VCPUS 255

#define KVM_INTERNAL_MEM_SLOTS 1

/*
 * 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 KVM_REQ_REFRESH_GUEST_PREFIX    \
        KVM_ARCH_REQ_FLAGS(6, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)

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_lpswey;
        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;
        u64 signal_exits;
};

#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_SECURE_STORAGE_ACCESS       0x3d
#define PGM_NON_SECURE_STORAGE_ACCESS   0x3e
#define PGM_SECURE_STORAGE_VIOLATION    0x3f
#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 last_sleep_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 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;
        bool gs_enabled;
        bool skey_enabled;
        /* Indicator if the access registers have been loaded from guest */
        bool acrs_loaded;
        struct kvm_s390_pv_vcpu pv;
        union diag318_info diag318_info;
        struct kvm_s390_mmu_cache *mc;
};

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;
        u64 aen_forward;
        u64 gmap_shadow_create;
        u64 gmap_shadow_reuse;
        u64 gmap_shadow_r1_entry;
        u64 gmap_shadow_r2_entry;
        u64 gmap_shadow_r3_entry;
        u64 gmap_shadow_sg_entry;
        u64 gmap_shadow_pg_entry;
};

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_MASK_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;
        /* subset of available UV-features for pv-guests enabled by user space */
        struct kvm_s390_vm_cpu_uv_feat uv_feat_guest;
};

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 vsie_page;

struct kvm_s390_vsie {
        struct mutex mutex;
        struct radix_tree_root addr_to_page;
        int page_count;
        int next;
        struct vsie_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;
        bool dumping;
        void *set_aside;
        struct list_head need_cleanup;
        struct mmu_notifier mmu_notifier;
        /* Protects against concurrent import-like operations */
        struct mutex import_lock;
};

struct kvm_s390_mmu_cache;

struct kvm_arch {
        struct esca_block *sca;
        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 use_zpci_interp;
        int user_cpu_state_ctrl;
        int user_sigp;
        int user_stsi;
        int user_instr0;
        int user_operexec;
        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;
        struct list_head kzdev_list;
        spinlock_t kzdev_list_lock;
        struct kvm_s390_mmu_cache *mc;
};

#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);

#define SIE64_RETURN_NORMAL     0
#define SIE64_RETURN_MCCK       1

int __sie64a(phys_addr_t sie_block_phys, struct kvm_s390_sie_block *sie_block, u64 *rsa,
             unsigned long gasce);

static inline int sie64a(struct kvm_s390_sie_block *sie_block, u64 *rsa, unsigned long gasce)
{
        return __sie64a(virt_to_phys(sie_block), sie_block, rsa, gasce);
}

extern char sie_exit;

bool kvm_s390_pv_is_protected(struct kvm *kvm);
bool kvm_s390_pv_cpu_is_protected(struct kvm_vcpu *vcpu);

extern int kvm_s390_enter_exit_sie(struct kvm_s390_sie_block *scb,
                                   u64 *gprs, unsigned long gasce);

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

bool kvm_s390_is_gpa_in_memslot(struct kvm *kvm, gpa_t gpa);

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) {}

#define __KVM_HAVE_ARCH_VM_FREE
void kvm_arch_free_vm(struct kvm *kvm);

struct zpci_kvm_hook {
        int (*kvm_register)(void *opaque, struct kvm *kvm);
        void (*kvm_unregister)(void *opaque);
};

extern struct zpci_kvm_hook zpci_kvm_hook;

#endif
Linux
