include/xen/interface/physdev.h

   1 /*
   2  * Permission is hereby granted, free of charge, to any person obtaining a copy
   3  * of this software and associated documentation files (the "Software"), to
   4  * deal in the Software without restriction, including without limitation the
   5  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   6  * sell copies of the Software, and to permit persons to whom the Software is
   7  * furnished to do so, subject to the following conditions:
   8  *
   9  * The above copyright notice and this permission notice shall be included in
  10  * all copies or substantial portions of the Software.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  14  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  15  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  16  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  17  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  18  * DEALINGS IN THE SOFTWARE.
  19  */
  20
  21 #ifndef __XEN_PUBLIC_PHYSDEV_H__
  22 #define __XEN_PUBLIC_PHYSDEV_H__
  23
  24 /*
  25  * Prototype for this hypercall is:
  26  *  int physdev_op(int cmd, void *args)
  27  * @cmd  == PHYSDEVOP_??? (physdev operation).
  28  * @args == Operation-specific extra arguments (NULL if none).
  29  */
  30
  31 /*
  32  * Notify end-of-interrupt (EOI) for the specified IRQ.
  33  * @arg == pointer to physdev_eoi structure.
  34  */
  35 #define PHYSDEVOP_eoi                   12
  36 struct physdev_eoi {
  37         /* IN */
  38         uint32_t irq;
  39 };
  40
  41 /*
  42  * Query the status of an IRQ line.
  43  * @arg == pointer to physdev_irq_status_query structure.
  44  */
  45 #define PHYSDEVOP_irq_status_query       5
  46 struct physdev_irq_status_query {
  47         /* IN */
  48         uint32_t irq;
  49         /* OUT */
  50         uint32_t flags; /* XENIRQSTAT_* */
  51 };
  52
  53 /* Need to call PHYSDEVOP_eoi when the IRQ has been serviced? */
  54 #define _XENIRQSTAT_needs_eoi   (0)
  55 #define  XENIRQSTAT_needs_eoi   (1U<<_XENIRQSTAT_needs_eoi)
  56
  57 /* IRQ shared by multiple guests? */
  58 #define _XENIRQSTAT_shared      (1)
  59 #define  XENIRQSTAT_shared      (1U<<_XENIRQSTAT_shared)
  60
  61 /*
  62  * Set the current VCPU's I/O privilege level.
  63  * @arg == pointer to physdev_set_iopl structure.
  64  */
  65 #define PHYSDEVOP_set_iopl               6
  66 struct physdev_set_iopl {
  67         /* IN */
  68         uint32_t iopl;
  69 };
  70
  71 /*
  72  * Set the current VCPU's I/O-port permissions bitmap.
  73  * @arg == pointer to physdev_set_iobitmap structure.
  74  */
  75 #define PHYSDEVOP_set_iobitmap           7
  76 struct physdev_set_iobitmap {
  77         /* IN */
  78         uint8_t * bitmap;
  79         uint32_t nr_ports;
  80 };
  81
  82 /*
  83  * Read or write an IO-APIC register.
  84  * @arg == pointer to physdev_apic structure.
  85  */
  86 #define PHYSDEVOP_apic_read              8
  87 #define PHYSDEVOP_apic_write             9
  88 struct physdev_apic {
  89         /* IN */
  90         unsigned long apic_physbase;
  91         uint32_t reg;
  92         /* IN or OUT */
  93         uint32_t value;
  94 };
  95
  96 /*
  97  * Allocate or free a physical upcall vector for the specified IRQ line.
  98  * @arg == pointer to physdev_irq structure.
  99  */
 100 #define PHYSDEVOP_alloc_irq_vector      10
 101 #define PHYSDEVOP_free_irq_vector       11
 102 struct physdev_irq {
 103         /* IN */
 104         uint32_t irq;
 105         /* IN or OUT */
 106         uint32_t vector;
 107 };
 108
 109 /*
 110  * Argument to physdev_op_compat() hypercall. Superceded by new physdev_op()
 111  * hypercall since 0x00030202.
 112  */
 113 struct physdev_op {
 114         uint32_t cmd;
 115         union {
 116                 struct physdev_irq_status_query      irq_status_query;
 117                 struct physdev_set_iopl              set_iopl;
 118                 struct physdev_set_iobitmap          set_iobitmap;
 119                 struct physdev_apic                  apic_op;
 120                 struct physdev_irq                   irq_op;
 121         } u;
 122 };
 123
 124 /*
 125  * Notify that some PIRQ-bound event channels have been unmasked.
 126  * ** This command is obsolete since interface version 0x00030202 and is **
 127  * ** unsupported by newer versions of Xen.                              **
 128  */
 129 #define PHYSDEVOP_IRQ_UNMASK_NOTIFY      4
 130
 131 /*
 132  * These all-capitals physdev operation names are superceded by the new names
 133  * (defined above) since interface version 0x00030202.
 134  */
 135 #define PHYSDEVOP_IRQ_STATUS_QUERY       PHYSDEVOP_irq_status_query
 136 #define PHYSDEVOP_SET_IOPL               PHYSDEVOP_set_iopl
 137 #define PHYSDEVOP_SET_IOBITMAP           PHYSDEVOP_set_iobitmap
 138 #define PHYSDEVOP_APIC_READ              PHYSDEVOP_apic_read
 139 #define PHYSDEVOP_APIC_WRITE             PHYSDEVOP_apic_write
 140 #define PHYSDEVOP_ASSIGN_VECTOR          PHYSDEVOP_alloc_irq_vector
 141 #define PHYSDEVOP_FREE_VECTOR            PHYSDEVOP_free_irq_vector
 142 #define PHYSDEVOP_IRQ_NEEDS_UNMASK_NOTIFY XENIRQSTAT_needs_eoi
 143 #define PHYSDEVOP_IRQ_SHARED             XENIRQSTAT_shared
 144
 145 #endif /* __XEN_PUBLIC_PHYSDEV_H__ */