src/include/xen/hvm/hvm_op.h

/* SPDX-License-Identifier: MIT */
/*
 * Copyright (c) 2007, Keir Fraser
 */

#ifndef __XEN_PUBLIC_HVM_HVM_OP_H__
#define __XEN_PUBLIC_HVM_HVM_OP_H__

FILE_LICENCE ( MIT );

#include "../xen.h"
#include "../trace.h"
#include "../event_channel.h"

/* Get/set subcommands: extra argument == pointer to xen_hvm_param struct. */
#define HVMOP_set_param           0
#define HVMOP_get_param           1
struct xen_hvm_param {
    domid_t  domid;    /* IN */
    uint16_t pad;
    uint32_t index;    /* IN */
    uint64_t value;    /* IN/OUT */
};
typedef struct xen_hvm_param xen_hvm_param_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_param_t);

struct xen_hvm_altp2m_suppress_ve {
    uint16_t view;
    uint8_t suppress_ve; /* Boolean type. */
    uint8_t pad1;
    uint32_t pad2;
    uint64_t gfn;
};

struct xen_hvm_altp2m_suppress_ve_multi {
    uint16_t view;
    uint8_t suppress_ve; /* Boolean type. */
    uint8_t pad1;
    int32_t first_error; /* Should be set to 0. */
    uint64_t first_gfn; /* Value may be updated. */
    uint64_t last_gfn;
    uint64_t first_error_gfn; /* Gfn of the first error. */
};

#if __XEN_INTERFACE_VERSION__ < 0x00040900

/* Set the logical level of one of a domain's PCI INTx wires. */
#define HVMOP_set_pci_intx_level  2
struct xen_hvm_set_pci_intx_level {
    /* Domain to be updated. */
    domid_t  domid;
    /* PCI INTx identification in PCI topology (domain:bus:device:intx). */
    uint8_t  domain, bus, device, intx;
    /* Assertion level (0 = unasserted, 1 = asserted). */
    uint8_t  level;
};
typedef struct xen_hvm_set_pci_intx_level xen_hvm_set_pci_intx_level_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_set_pci_intx_level_t);

/* Set the logical level of one of a domain's ISA IRQ wires. */
#define HVMOP_set_isa_irq_level   3
struct xen_hvm_set_isa_irq_level {
    /* Domain to be updated. */
    domid_t  domid;
    /* ISA device identification, by ISA IRQ (0-15). */
    uint8_t  isa_irq;
    /* Assertion level (0 = unasserted, 1 = asserted). */
    uint8_t  level;
};
typedef struct xen_hvm_set_isa_irq_level xen_hvm_set_isa_irq_level_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_set_isa_irq_level_t);

#define HVMOP_set_pci_link_route  4
struct xen_hvm_set_pci_link_route {
    /* Domain to be updated. */
    domid_t  domid;
    /* PCI link identifier (0-3). */
    uint8_t  link;
    /* ISA IRQ (1-15), or 0 (disable link). */
    uint8_t  isa_irq;
};
typedef struct xen_hvm_set_pci_link_route xen_hvm_set_pci_link_route_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_set_pci_link_route_t);

#endif /* __XEN_INTERFACE_VERSION__ < 0x00040900 */

/* Flushes all VCPU TLBs: @arg must be NULL. */
#define HVMOP_flush_tlbs          5

/*
 * hvmmem_type_t should not be defined when generating the corresponding
 * compat header. This will ensure that the improperly named HVMMEM_(*)
 * values are defined only once.
 */
#ifndef XEN_GENERATING_COMPAT_HEADERS

typedef enum {
    HVMMEM_ram_rw,             /* Normal read/write guest RAM */
    HVMMEM_ram_ro,             /* Read-only; writes are discarded */
    HVMMEM_mmio_dm,            /* Reads and write go to the device model */
#if __XEN_INTERFACE_VERSION__ < 0x00040700
    HVMMEM_mmio_write_dm,      /* Read-only; writes go to the device model */
#else
    HVMMEM_unused,             /* Placeholder; setting memory to this type
                                  will fail for code after 4.7.0 */
#endif
    HVMMEM_ioreq_server        /* Memory type claimed by an ioreq server; type
                                  changes to this value are only allowed after
                                  an ioreq server has claimed its ownership.
                                  Only pages with HVMMEM_ram_rw are allowed to
                                  change to this type; conversely, pages with
                                  this type are only allowed to be changed back
                                  to HVMMEM_ram_rw. */
} hvmmem_type_t;

#endif /* XEN_GENERATING_COMPAT_HEADERS */

/* Hint from PV drivers for pagetable destruction. */
#define HVMOP_pagetable_dying        9
struct xen_hvm_pagetable_dying {
    /* Domain with a pagetable about to be destroyed. */
    domid_t  domid;
    uint16_t pad[3]; /* align next field on 8-byte boundary */
    /* guest physical address of the toplevel pagetable dying */
    uint64_t gpa;
};
typedef struct xen_hvm_pagetable_dying xen_hvm_pagetable_dying_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_pagetable_dying_t);

/* Get the current Xen time, in nanoseconds since system boot. */
#define HVMOP_get_time              10
struct xen_hvm_get_time {
    uint64_t now;      /* OUT */
};
typedef struct xen_hvm_get_time xen_hvm_get_time_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_get_time_t);

#define HVMOP_xentrace              11
struct xen_hvm_xentrace {
    uint16_t event, extra_bytes;
    uint8_t extra[TRACE_EXTRA_MAX * sizeof(uint32_t)];
};
typedef struct xen_hvm_xentrace xen_hvm_xentrace_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_xentrace_t);

/* Following tools-only interfaces may change in future. */
#if defined(__XEN__) || defined(__XEN_TOOLS__)

/* Deprecated by XENMEM_access_op_set_access */
#define HVMOP_set_mem_access        12

/* Deprecated by XENMEM_access_op_get_access */
#define HVMOP_get_mem_access        13

#endif /* defined(__XEN__) || defined(__XEN_TOOLS__) */

#define HVMOP_get_mem_type    15
/* Return hvmmem_type_t for the specified pfn. */
struct xen_hvm_get_mem_type {
    /* Domain to be queried. */
    domid_t domid;
    /* OUT variable. */
    uint16_t mem_type;
    uint16_t pad[2]; /* align next field on 8-byte boundary */
    /* IN variable. */
    uint64_t pfn;
};
typedef struct xen_hvm_get_mem_type xen_hvm_get_mem_type_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_get_mem_type_t);

/* Following tools-only interfaces may change in future. */
#if defined(__XEN__) || defined(__XEN_TOOLS__)

/*
 * Definitions relating to DMOP_create_ioreq_server. (Defined here for
 * backwards compatibility).
 */

#define HVM_IOREQSRV_BUFIOREQ_OFF    0
#define HVM_IOREQSRV_BUFIOREQ_LEGACY 1
/*
 * Use this when read_pointer gets updated atomically and
 * the pointer pair gets read atomically:
 */
#define HVM_IOREQSRV_BUFIOREQ_ATOMIC 2

#endif /* defined(__XEN__) || defined(__XEN_TOOLS__) */

#if defined(__i386__) || defined(__x86_64__)

/*
 * HVMOP_set_evtchn_upcall_vector: Set a <vector> that should be used for event
 *                                 channel upcalls on the specified <vcpu>. If set,
 *                                 this vector will be used in preference to the
 *                                 domain global callback via (see
 *                                 HVM_PARAM_CALLBACK_IRQ).
 */
#define HVMOP_set_evtchn_upcall_vector 23
struct xen_hvm_evtchn_upcall_vector {
    uint32_t vcpu;
    uint8_t vector;
};
typedef struct xen_hvm_evtchn_upcall_vector xen_hvm_evtchn_upcall_vector_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_evtchn_upcall_vector_t);

#endif /* defined(__i386__) || defined(__x86_64__) */

#define HVMOP_guest_request_vm_event 24

/* HVMOP_altp2m: perform altp2m state operations */
#define HVMOP_altp2m 25

#define HVMOP_ALTP2M_INTERFACE_VERSION 0x00000001

struct xen_hvm_altp2m_domain_state {
    /* IN or OUT variable on/off */
    uint8_t state;
};
typedef struct xen_hvm_altp2m_domain_state xen_hvm_altp2m_domain_state_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_domain_state_t);

struct xen_hvm_altp2m_vcpu_enable_notify {
    uint32_t vcpu_id;
    uint32_t pad;
    /* #VE info area gfn */
    uint64_t gfn;
};
typedef struct xen_hvm_altp2m_vcpu_enable_notify xen_hvm_altp2m_vcpu_enable_notify_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_vcpu_enable_notify_t);

struct xen_hvm_altp2m_vcpu_disable_notify {
    uint32_t vcpu_id;
};
typedef struct xen_hvm_altp2m_vcpu_disable_notify xen_hvm_altp2m_vcpu_disable_notify_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_vcpu_disable_notify_t);

struct xen_hvm_altp2m_view {
    /* IN/OUT variable */
    uint16_t view;
    uint16_t hvmmem_default_access; /* xenmem_access_t */
};
typedef struct xen_hvm_altp2m_view xen_hvm_altp2m_view_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_view_t);

#if __XEN_INTERFACE_VERSION__ < 0x00040a00
struct xen_hvm_altp2m_set_mem_access {
    /* view */
    uint16_t view;
    /* Memory type */
    uint16_t access; /* xenmem_access_t */
    uint32_t pad;
    /* gfn */
    uint64_t gfn;
};
typedef struct xen_hvm_altp2m_set_mem_access xen_hvm_altp2m_set_mem_access_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_set_mem_access_t);
#endif /* __XEN_INTERFACE_VERSION__ < 0x00040a00 */

struct xen_hvm_altp2m_mem_access {
    /* view */
    uint16_t view;
    /* Memory type */
    uint16_t access; /* xenmem_access_t */
    uint32_t pad;
    /* gfn */
    uint64_t gfn;
};
typedef struct xen_hvm_altp2m_mem_access xen_hvm_altp2m_mem_access_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_mem_access_t);

struct xen_hvm_altp2m_set_mem_access_multi {
    /* view */
    uint16_t view;
    uint16_t pad;
    /* Number of pages */
    uint32_t nr;
    /*
     * Used for continuation purposes.
     * Must be set to zero upon initial invocation.
     */
    uint64_t opaque;
    /* List of pfns to set access for */
    XEN_GUEST_HANDLE(const_uint64) pfn_list;
    /* Corresponding list of access settings for pfn_list */
    XEN_GUEST_HANDLE(const_uint8) access_list;
};

struct xen_hvm_altp2m_change_gfn {
    /* view */
    uint16_t view;
    uint16_t pad1;
    uint32_t pad2;
    /* old gfn */
    uint64_t old_gfn;
    /* new gfn, INVALID_GFN (~0UL) means revert */
    uint64_t new_gfn;
};
typedef struct xen_hvm_altp2m_change_gfn xen_hvm_altp2m_change_gfn_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_change_gfn_t);

struct xen_hvm_altp2m_get_vcpu_p2m_idx {
    uint32_t vcpu_id;
    uint16_t altp2m_idx;
};

struct xen_hvm_altp2m_set_visibility {
    uint16_t altp2m_idx;
    uint8_t visible;
    uint8_t pad;
};

struct xen_hvm_altp2m_op {
    uint32_t version;   /* HVMOP_ALTP2M_INTERFACE_VERSION */
    uint32_t cmd;
/* Get/set the altp2m state for a domain */
#define HVMOP_altp2m_get_domain_state     1
#define HVMOP_altp2m_set_domain_state     2
/* Set a given VCPU to receive altp2m event notifications */
#define HVMOP_altp2m_vcpu_enable_notify   3
/* Create a new view */
#define HVMOP_altp2m_create_p2m           4
/* Destroy a view */
#define HVMOP_altp2m_destroy_p2m          5
/* Switch view for an entire domain */
#define HVMOP_altp2m_switch_p2m           6
/* Notify that a page of memory is to have specific access types */
#define HVMOP_altp2m_set_mem_access       7
/* Change a p2m entry to have a different gfn->mfn mapping */
#define HVMOP_altp2m_change_gfn           8
/* Set access for an array of pages */
#define HVMOP_altp2m_set_mem_access_multi 9
/* Set the "Suppress #VE" bit on a page */
#define HVMOP_altp2m_set_suppress_ve      10
/* Get the "Suppress #VE" bit of a page */
#define HVMOP_altp2m_get_suppress_ve      11
/* Get the access of a page of memory from a certain view */
#define HVMOP_altp2m_get_mem_access       12
/* Disable altp2m event notifications for a given VCPU */
#define HVMOP_altp2m_vcpu_disable_notify  13
/* Get the active vcpu p2m index */
#define HVMOP_altp2m_get_p2m_idx          14
/* Set the "Supress #VE" bit for a range of pages */
#define HVMOP_altp2m_set_suppress_ve_multi 15
/* Set visibility for a given altp2m view */
#define HVMOP_altp2m_set_visibility       16
    domid_t domain;
    uint16_t pad1;
    uint32_t pad2;
    union {
        struct xen_hvm_altp2m_domain_state         domain_state;
        struct xen_hvm_altp2m_vcpu_enable_notify   enable_notify;
        struct xen_hvm_altp2m_view                 view;
#if __XEN_INTERFACE_VERSION__ < 0x00040a00
        struct xen_hvm_altp2m_set_mem_access       set_mem_access;
#endif /* __XEN_INTERFACE_VERSION__ < 0x00040a00 */
        struct xen_hvm_altp2m_mem_access           mem_access;
        struct xen_hvm_altp2m_change_gfn           change_gfn;
        struct xen_hvm_altp2m_set_mem_access_multi set_mem_access_multi;
        struct xen_hvm_altp2m_suppress_ve          suppress_ve;
        struct xen_hvm_altp2m_suppress_ve_multi    suppress_ve_multi;
        struct xen_hvm_altp2m_vcpu_disable_notify  disable_notify;
        struct xen_hvm_altp2m_get_vcpu_p2m_idx     get_vcpu_p2m_idx;
        struct xen_hvm_altp2m_set_visibility       set_visibility;
        uint8_t pad[64];
    } u;
};
typedef struct xen_hvm_altp2m_op xen_hvm_altp2m_op_t;
DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_op_t);

#endif /* __XEN_PUBLIC_HVM_HVM_OP_H__ */

/*
 * Local variables:
 * mode: C
 * c-file-style: "BSD"
 * c-basic-offset: 4
 * tab-width: 4
 * indent-tabs-mode: nil
 * End:
 */