include/hw/i386/x86-iommu.h

   1 /*
   2  * Common IOMMU interface for X86 platform
   3  *
   4  * Copyright (C) 2016 Peter Xu, Red Hat <peterx@redhat.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef IOMMU_COMMON_H
  21 #define IOMMU_COMMON_H
  22
  23 #include "hw/sysbus.h"
  24 #include "hw/pci/pci.h"
  25
  26 #define  TYPE_X86_IOMMU_DEVICE  ("x86-iommu")
  27 #define  X86_IOMMU_DEVICE(obj) \
  28     OBJECT_CHECK(X86IOMMUState, (obj), TYPE_X86_IOMMU_DEVICE)
  29 #define  X86_IOMMU_CLASS(klass) \
  30     OBJECT_CLASS_CHECK(X86IOMMUClass, (klass), TYPE_X86_IOMMU_DEVICE)
  31 #define  X86_IOMMU_GET_CLASS(obj) \
  32     OBJECT_GET_CLASS(X86IOMMUClass, obj, TYPE_X86_IOMMU_DEVICE)
  33
  34 #define X86_IOMMU_PCI_DEVFN_MAX           256
  35 #define X86_IOMMU_SID_INVALID             (0xffff)
  36
  37 typedef struct X86IOMMUState X86IOMMUState;
  38 typedef struct X86IOMMUClass X86IOMMUClass;
  39
  40 struct X86IOMMUClass {
  41     SysBusDeviceClass parent;
  42     /* Intel/AMD specific realize() hook */
  43     DeviceRealize realize;
  44     /* MSI-based interrupt remapping */
  45     int (*int_remap)(X86IOMMUState *iommu, MSIMessage *src,
  46                      MSIMessage *dst, uint16_t sid);
  47 };
  48
  49 struct X86IOMMUState {
  50     SysBusDevice busdev;
  51     bool intr_supported;        /* Whether vIOMMU supports IR */
  52 };
  53
  54 /**
  55  * x86_iommu_get_default - get default IOMMU device
  56  * @return: pointer to default IOMMU device
  57  */
  58 X86IOMMUState *x86_iommu_get_default(void);
  59
  60 #endif