134 lines
4.6 KiB
C
134 lines
4.6 KiB
C
/*
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* QEMU emulation of an Intel IOMMU (VT-d)
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* (DMA Remapping device)
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*
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* Copyright (C) 2013 Knut Omang, Oracle <knut.omang@oracle.com>
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* Copyright (C) 2014 Le Tan, <tamlokveer@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INTEL_IOMMU_H
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#define INTEL_IOMMU_H
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#include "hw/qdev.h"
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#include "sysemu/dma.h"
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#define TYPE_INTEL_IOMMU_DEVICE "intel-iommu"
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#define INTEL_IOMMU_DEVICE(obj) \
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OBJECT_CHECK(IntelIOMMUState, (obj), TYPE_INTEL_IOMMU_DEVICE)
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/* DMAR Hardware Unit Definition address (IOMMU unit) */
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#define Q35_HOST_BRIDGE_IOMMU_ADDR 0xfed90000ULL
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#define VTD_PCI_BUS_MAX 256
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#define VTD_PCI_SLOT_MAX 32
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#define VTD_PCI_FUNC_MAX 8
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#define VTD_PCI_DEVFN_MAX 256
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#define VTD_PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
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#define VTD_PCI_FUNC(devfn) ((devfn) & 0x07)
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#define VTD_SID_TO_BUS(sid) (((sid) >> 8) & 0xff)
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#define VTD_SID_TO_DEVFN(sid) ((sid) & 0xff)
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#define DMAR_REG_SIZE 0x230
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#define VTD_HOST_ADDRESS_WIDTH 39
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#define VTD_HAW_MASK ((1ULL << VTD_HOST_ADDRESS_WIDTH) - 1)
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typedef struct VTDContextEntry VTDContextEntry;
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typedef struct VTDContextCacheEntry VTDContextCacheEntry;
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typedef struct IntelIOMMUState IntelIOMMUState;
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typedef struct VTDAddressSpace VTDAddressSpace;
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typedef struct VTDIOTLBEntry VTDIOTLBEntry;
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typedef struct VTDBus VTDBus;
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/* Context-Entry */
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struct VTDContextEntry {
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uint64_t lo;
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uint64_t hi;
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};
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struct VTDContextCacheEntry {
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/* The cache entry is obsolete if
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* context_cache_gen!=IntelIOMMUState.context_cache_gen
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*/
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uint32_t context_cache_gen;
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struct VTDContextEntry context_entry;
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};
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struct VTDAddressSpace {
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PCIBus *bus;
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uint8_t devfn;
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AddressSpace as;
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MemoryRegion iommu;
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IntelIOMMUState *iommu_state;
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VTDContextCacheEntry context_cache_entry;
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};
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struct VTDBus {
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PCIBus* bus; /* A reference to the bus to provide translation for */
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VTDAddressSpace *dev_as[0]; /* A table of VTDAddressSpace objects indexed by devfn */
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};
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struct VTDIOTLBEntry {
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uint64_t gfn;
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uint16_t domain_id;
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uint64_t slpte;
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uint64_t mask;
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bool read_flags;
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bool write_flags;
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};
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/* The iommu (DMAR) device state struct */
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struct IntelIOMMUState {
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SysBusDevice busdev;
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MemoryRegion csrmem;
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uint8_t csr[DMAR_REG_SIZE]; /* register values */
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uint8_t wmask[DMAR_REG_SIZE]; /* R/W bytes */
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uint8_t w1cmask[DMAR_REG_SIZE]; /* RW1C(Write 1 to Clear) bytes */
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uint8_t womask[DMAR_REG_SIZE]; /* WO (write only - read returns 0) */
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uint32_t version;
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dma_addr_t root; /* Current root table pointer */
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bool root_extended; /* Type of root table (extended or not) */
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bool dmar_enabled; /* Set if DMA remapping is enabled */
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uint16_t iq_head; /* Current invalidation queue head */
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uint16_t iq_tail; /* Current invalidation queue tail */
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dma_addr_t iq; /* Current invalidation queue pointer */
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uint16_t iq_size; /* IQ Size in number of entries */
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bool qi_enabled; /* Set if the QI is enabled */
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uint8_t iq_last_desc_type; /* The type of last completed descriptor */
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/* The index of the Fault Recording Register to be used next.
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* Wraps around from N-1 to 0, where N is the number of FRCD_REG.
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*/
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uint16_t next_frcd_reg;
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uint64_t cap; /* The value of capability reg */
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uint64_t ecap; /* The value of extended capability reg */
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uint32_t context_cache_gen; /* Should be in [1,MAX] */
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GHashTable *iotlb; /* IOTLB */
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MemoryRegionIOMMUOps iommu_ops;
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GHashTable *vtd_as_by_busptr; /* VTDBus objects indexed by PCIBus* reference */
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VTDBus *vtd_as_by_bus_num[VTD_PCI_BUS_MAX]; /* VTDBus objects indexed by bus number */
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};
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/* Find the VTD Address space associated with the given bus pointer,
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* create a new one if none exists
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*/
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VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, int devfn);
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#endif
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