src/include/xen/physdev.h

/* SPDX-License-Identifier: MIT */
/*
 * Copyright (c) 2006, Keir Fraser
 */

#ifndef __XEN_PUBLIC_PHYSDEV_H__
#define __XEN_PUBLIC_PHYSDEV_H__

FILE_LICENCE ( MIT );
FILE_SECBOOT ( PERMITTED );

#include "xen.h"

/*
 * Prototype for this hypercall is:
 *  int physdev_op(int cmd, void *args)
 * @cmd  == PHYSDEVOP_??? (physdev operation).
 * @args == Operation-specific extra arguments (NULL if none).
 */

/*
 * Notify end-of-interrupt (EOI) for the specified IRQ.
 * @arg == pointer to physdev_eoi structure.
 */
#define PHYSDEVOP_eoi                   12
struct physdev_eoi {
    /* IN */
    uint32_t irq;
};
typedef struct physdev_eoi physdev_eoi_t;
DEFINE_XEN_GUEST_HANDLE(physdev_eoi_t);

/*
 * Register a shared page for the hypervisor to indicate whether the guest
 * must issue PHYSDEVOP_eoi. The semantics of PHYSDEVOP_eoi change slightly
 * once the guest used this function in that the associated event channel
 * will automatically get unmasked. The page registered is used as a bit
 * array indexed by Xen's PIRQ value.
 */
#define PHYSDEVOP_pirq_eoi_gmfn_v1       17
/*
 * Register a shared page for the hypervisor to indicate whether the
 * guest must issue PHYSDEVOP_eoi. This hypercall is very similar to
 * PHYSDEVOP_pirq_eoi_gmfn_v1 but it doesn't change the semantics of
 * PHYSDEVOP_eoi. The page registered is used as a bit array indexed by
 * Xen's PIRQ value.
 */
#define PHYSDEVOP_pirq_eoi_gmfn_v2       28
struct physdev_pirq_eoi_gmfn {
    /* IN */
    xen_pfn_t gmfn;
};
typedef struct physdev_pirq_eoi_gmfn physdev_pirq_eoi_gmfn_t;
DEFINE_XEN_GUEST_HANDLE(physdev_pirq_eoi_gmfn_t);

/*
 * Query the status of an IRQ line.
 * @arg == pointer to physdev_irq_status_query structure.
 */
#define PHYSDEVOP_irq_status_query       5
struct physdev_irq_status_query {
    /* IN */
    uint32_t irq;
    /* OUT */
    uint32_t flags; /* XENIRQSTAT_* */
};
typedef struct physdev_irq_status_query physdev_irq_status_query_t;
DEFINE_XEN_GUEST_HANDLE(physdev_irq_status_query_t);

/* Need to call PHYSDEVOP_eoi when the IRQ has been serviced? */
#define _XENIRQSTAT_needs_eoi   (0)
#define  XENIRQSTAT_needs_eoi   (1U<<_XENIRQSTAT_needs_eoi)

/* IRQ shared by multiple guests? */
#define _XENIRQSTAT_shared      (1)
#define  XENIRQSTAT_shared      (1U<<_XENIRQSTAT_shared)

/*
 * Set the current VCPU's I/O privilege level.
 * @arg == pointer to physdev_set_iopl structure.
 */
#define PHYSDEVOP_set_iopl               6
struct physdev_set_iopl {
    /* IN */
    uint32_t iopl;
};
typedef struct physdev_set_iopl physdev_set_iopl_t;
DEFINE_XEN_GUEST_HANDLE(physdev_set_iopl_t);

/*
 * Set the current VCPU's I/O-port permissions bitmap.
 * @arg == pointer to physdev_set_iobitmap structure.
 *
 * When @nr_ports is non-zero, Xen, like real CPUs and the TSS IOPB, always
 * reads 2 bytes from @bitmap, which might be one byte beyond @nr_ports.
 */
#define PHYSDEVOP_set_iobitmap           7
struct physdev_set_iobitmap {
    /* IN */
#if __XEN_INTERFACE_VERSION__ >= 0x00030205
    XEN_GUEST_HANDLE(uint8) bitmap;
#else
    uint8_t *bitmap;
#endif
    uint32_t nr_ports;
};
typedef struct physdev_set_iobitmap physdev_set_iobitmap_t;
DEFINE_XEN_GUEST_HANDLE(physdev_set_iobitmap_t);

/*
 * Read or write an IO-APIC register.
 * @arg == pointer to physdev_apic structure.
 */
#define PHYSDEVOP_apic_read              8
#define PHYSDEVOP_apic_write             9
struct physdev_apic {
    /* IN */
    unsigned long apic_physbase;
    uint32_t reg;
    /* IN or OUT */
    uint32_t value;
};
typedef struct physdev_apic physdev_apic_t;
DEFINE_XEN_GUEST_HANDLE(physdev_apic_t);

/*
 * Allocate or free a physical upcall vector for the specified IRQ line.
 * @arg == pointer to physdev_irq structure.
 */
#define PHYSDEVOP_alloc_irq_vector      10
#define PHYSDEVOP_free_irq_vector       11
struct physdev_irq {
    /* IN */
    uint32_t irq;
    /* IN or OUT */
    uint32_t vector;
};
typedef struct physdev_irq physdev_irq_t;
DEFINE_XEN_GUEST_HANDLE(physdev_irq_t);

#define MAP_PIRQ_TYPE_MSI               0x0
#define MAP_PIRQ_TYPE_GSI               0x1
#define MAP_PIRQ_TYPE_UNKNOWN           0x2
#define MAP_PIRQ_TYPE_MSI_SEG           0x3
#define MAP_PIRQ_TYPE_MULTI_MSI         0x4

#define PHYSDEVOP_map_pirq               13
struct physdev_map_pirq {
    domid_t domid;
    /* IN */
    int type;
    /* IN (ignored for ..._MULTI_MSI) */
    int index;
    /* IN or OUT */
    int pirq;
    /* IN - high 16 bits hold segment for ..._MSI_SEG and ..._MULTI_MSI */
    int bus;
    /* IN */
    int devfn;
    /* IN (also OUT for ..._MULTI_MSI) */
    int entry_nr;
    /* IN */
    uint64_t table_base;
};
typedef struct physdev_map_pirq physdev_map_pirq_t;
DEFINE_XEN_GUEST_HANDLE(physdev_map_pirq_t);

#define PHYSDEVOP_unmap_pirq             14
struct physdev_unmap_pirq {
    domid_t domid;
    /* IN */
    int pirq;
};

typedef struct physdev_unmap_pirq physdev_unmap_pirq_t;
DEFINE_XEN_GUEST_HANDLE(physdev_unmap_pirq_t);

#define PHYSDEVOP_manage_pci_add         15
#define PHYSDEVOP_manage_pci_remove      16
struct physdev_manage_pci {
    /* IN */
    uint8_t bus;
    uint8_t devfn;
};

typedef struct physdev_manage_pci physdev_manage_pci_t;
DEFINE_XEN_GUEST_HANDLE(physdev_manage_pci_t);

#define PHYSDEVOP_restore_msi            19
struct physdev_restore_msi {
    /* IN */
    uint8_t bus;
    uint8_t devfn;
};
typedef struct physdev_restore_msi physdev_restore_msi_t;
DEFINE_XEN_GUEST_HANDLE(physdev_restore_msi_t);

#define PHYSDEVOP_manage_pci_add_ext     20
struct physdev_manage_pci_ext {
    /* IN */
    uint8_t bus;
    uint8_t devfn;
    uint32_t is_extfn;
    uint32_t is_virtfn;
    struct {
        uint8_t bus;
        uint8_t devfn;
    } physfn;
};

typedef struct physdev_manage_pci_ext physdev_manage_pci_ext_t;
DEFINE_XEN_GUEST_HANDLE(physdev_manage_pci_ext_t);

/*
 * Argument to physdev_op_compat() hypercall. Superceded by new physdev_op()
 * hypercall since 0x00030202.
 */
struct physdev_op {
    uint32_t cmd;
    union {
        physdev_irq_status_query_t irq_status_query;
        physdev_set_iopl_t         set_iopl;
        physdev_set_iobitmap_t     set_iobitmap;
        physdev_apic_t             apic_op;
        physdev_irq_t              irq_op;
    } u;
};
typedef struct physdev_op physdev_op_t;
DEFINE_XEN_GUEST_HANDLE(physdev_op_t);

#define PHYSDEVOP_setup_gsi    21
struct physdev_setup_gsi {
    int gsi;
    /* IN */
    uint8_t triggering;
    /* IN */
    uint8_t polarity;
    /* IN */
};

typedef struct physdev_setup_gsi physdev_setup_gsi_t;
DEFINE_XEN_GUEST_HANDLE(physdev_setup_gsi_t);

/* leave PHYSDEVOP 22 free */

/* type is MAP_PIRQ_TYPE_GSI or MAP_PIRQ_TYPE_MSI
 * the hypercall returns a free pirq */
#define PHYSDEVOP_get_free_pirq    23
struct physdev_get_free_pirq {
    /* IN */
    int type;
    /* OUT */
    uint32_t pirq;
};

typedef struct physdev_get_free_pirq physdev_get_free_pirq_t;
DEFINE_XEN_GUEST_HANDLE(physdev_get_free_pirq_t);

#define XEN_PCI_MMCFG_RESERVED         0x1

#define PHYSDEVOP_pci_mmcfg_reserved    24
struct physdev_pci_mmcfg_reserved {
    uint64_t address;
    uint16_t segment;
    uint8_t start_bus;
    uint8_t end_bus;
    uint32_t flags;
};
typedef struct physdev_pci_mmcfg_reserved physdev_pci_mmcfg_reserved_t;
DEFINE_XEN_GUEST_HANDLE(physdev_pci_mmcfg_reserved_t);

#define XEN_PCI_DEV_EXTFN              0x1
#define XEN_PCI_DEV_VIRTFN             0x2
#define XEN_PCI_DEV_PXM                0x4

#define PHYSDEVOP_pci_device_add        25
struct physdev_pci_device_add {
    /* IN */
    uint16_t seg;
    uint8_t bus;
    uint8_t devfn;
    uint32_t flags;
    struct {
        uint8_t bus;
        uint8_t devfn;
    } physfn;
    /*
     * Optional parameters array.
     * First element ([0]) is PXM domain associated with the device (if
     * XEN_PCI_DEV_PXM is set)
     */
    uint32_t optarr[XEN_FLEX_ARRAY_DIM];
};
typedef struct physdev_pci_device_add physdev_pci_device_add_t;
DEFINE_XEN_GUEST_HANDLE(physdev_pci_device_add_t);

#define PHYSDEVOP_pci_device_remove     26
#define PHYSDEVOP_restore_msi_ext       27
/*
 * Dom0 should use these two to announce MMIO resources assigned to
 * MSI-X capable devices won't (prepare) or may (release) change.
 */
#define PHYSDEVOP_prepare_msix          30
#define PHYSDEVOP_release_msix          31
/*
 * Notify the hypervisor that a PCI device has been reset, so that any
 * internally cached state is regenerated.  Should be called after any
 * device reset performed by the hardware domain.
 */
#define PHYSDEVOP_pci_device_reset      32

struct physdev_pci_device {
    /* IN */
    uint16_t seg;
    uint8_t bus;
    uint8_t devfn;
};
typedef struct physdev_pci_device physdev_pci_device_t;
DEFINE_XEN_GUEST_HANDLE(physdev_pci_device_t);

struct pci_device_reset {
    physdev_pci_device_t dev;
#define PCI_DEVICE_RESET_COLD 0x0
#define PCI_DEVICE_RESET_WARM 0x1
#define PCI_DEVICE_RESET_HOT  0x2
#define PCI_DEVICE_RESET_FLR  0x3
#define PCI_DEVICE_RESET_MASK 0x3
    uint32_t flags;
};

#define PHYSDEVOP_DBGP_RESET_PREPARE    1
#define PHYSDEVOP_DBGP_RESET_DONE       2

#define PHYSDEVOP_DBGP_BUS_UNKNOWN      0
#define PHYSDEVOP_DBGP_BUS_PCI          1

#define PHYSDEVOP_dbgp_op               29
struct physdev_dbgp_op {
    /* IN */
    uint8_t op;
    uint8_t bus;
    union {
        physdev_pci_device_t pci;
    } u;
};
typedef struct physdev_dbgp_op physdev_dbgp_op_t;
DEFINE_XEN_GUEST_HANDLE(physdev_dbgp_op_t);

/*
 * Notify that some PIRQ-bound event channels have been unmasked.
 * ** This command is obsolete since interface version 0x00030202 and is **
 * ** unsupported by newer versions of Xen.                              **
 */
#define PHYSDEVOP_IRQ_UNMASK_NOTIFY      4

#if __XEN_INTERFACE_VERSION__ < 0x00040600
/*
 * These all-capitals physdev operation names are superceded by the new names
 * (defined above) since interface version 0x00030202. The guard above was
 * added post-4.5 only though and hence shouldn't check for 0x00030202.
 */
#define PHYSDEVOP_IRQ_STATUS_QUERY       PHYSDEVOP_irq_status_query
#define PHYSDEVOP_SET_IOPL               PHYSDEVOP_set_iopl
#define PHYSDEVOP_SET_IOBITMAP           PHYSDEVOP_set_iobitmap
#define PHYSDEVOP_APIC_READ              PHYSDEVOP_apic_read
#define PHYSDEVOP_APIC_WRITE             PHYSDEVOP_apic_write
#define PHYSDEVOP_ASSIGN_VECTOR          PHYSDEVOP_alloc_irq_vector
#define PHYSDEVOP_FREE_VECTOR            PHYSDEVOP_free_irq_vector
#define PHYSDEVOP_IRQ_NEEDS_UNMASK_NOTIFY XENIRQSTAT_needs_eoi
#define PHYSDEVOP_IRQ_SHARED             XENIRQSTAT_shared
#endif

#if __XEN_INTERFACE_VERSION__ < 0x00040200
#define PHYSDEVOP_pirq_eoi_gmfn PHYSDEVOP_pirq_eoi_gmfn_v1
#else
#define PHYSDEVOP_pirq_eoi_gmfn PHYSDEVOP_pirq_eoi_gmfn_v2
#endif

#endif /* __XEN_PUBLIC_PHYSDEV_H__ */

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