6ee47c9008
Disabling MMAP support uses the slower read/write accesses but allows to trace all MMIO accesses, which is not good for performance, but very useful for reverse engineering PCI drivers. This option allows to disable MMAP per device without a compile-time change. Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
149 lines
4.4 KiB
C
149 lines
4.4 KiB
C
/*
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* common header for vfio based device assignment support
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*
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* Copyright Red Hat, Inc. 2012
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*
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* Authors:
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* Alex Williamson <alex.williamson@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Based on qemu-kvm device-assignment:
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* Adapted for KVM by Qumranet.
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* Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
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* Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
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* Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
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* Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
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* Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
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*/
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#ifndef HW_VFIO_VFIO_COMMON_H
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#define HW_VFIO_VFIO_COMMON_H
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#include "qemu-common.h"
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#include "exec/address-spaces.h"
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#include "exec/memory.h"
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#include "qemu/queue.h"
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#include "qemu/notify.h"
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/*#define DEBUG_VFIO*/
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#ifdef DEBUG_VFIO
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#define DPRINTF(fmt, ...) \
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do { fprintf(stderr, "vfio: " fmt, ## __VA_ARGS__); } while (0)
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#else
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#define DPRINTF(fmt, ...) \
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do { } while (0)
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#endif
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/* Extra debugging, trap acceleration paths for more logging */
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#define VFIO_ALLOW_KVM_INTX 1
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#define VFIO_ALLOW_KVM_MSI 1
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#define VFIO_ALLOW_KVM_MSIX 1
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enum {
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VFIO_DEVICE_TYPE_PCI = 0,
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};
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typedef struct VFIORegion {
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struct VFIODevice *vbasedev;
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off_t fd_offset; /* offset of region within device fd */
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MemoryRegion mem; /* slow, read/write access */
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MemoryRegion mmap_mem; /* direct mapped access */
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void *mmap;
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size_t size;
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uint32_t flags; /* VFIO region flags (rd/wr/mmap) */
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uint8_t nr; /* cache the region number for debug */
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} VFIORegion;
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typedef struct VFIOAddressSpace {
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AddressSpace *as;
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QLIST_HEAD(, VFIOContainer) containers;
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QLIST_ENTRY(VFIOAddressSpace) list;
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} VFIOAddressSpace;
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struct VFIOGroup;
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typedef struct VFIOType1 {
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MemoryListener listener;
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int error;
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bool initialized;
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} VFIOType1;
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typedef struct VFIOContainer {
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VFIOAddressSpace *space;
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int fd; /* /dev/vfio/vfio, empowered by the attached groups */
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struct {
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/* enable abstraction to support various iommu backends */
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union {
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VFIOType1 type1;
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};
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void (*release)(struct VFIOContainer *);
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} iommu_data;
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QLIST_HEAD(, VFIOGuestIOMMU) giommu_list;
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QLIST_HEAD(, VFIOGroup) group_list;
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QLIST_ENTRY(VFIOContainer) next;
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} VFIOContainer;
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typedef struct VFIOGuestIOMMU {
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VFIOContainer *container;
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MemoryRegion *iommu;
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Notifier n;
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QLIST_ENTRY(VFIOGuestIOMMU) giommu_next;
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} VFIOGuestIOMMU;
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typedef struct VFIODeviceOps VFIODeviceOps;
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typedef struct VFIODevice {
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QLIST_ENTRY(VFIODevice) next;
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struct VFIOGroup *group;
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char *name;
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int fd;
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int type;
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bool reset_works;
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bool needs_reset;
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bool allow_mmap;
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VFIODeviceOps *ops;
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unsigned int num_irqs;
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unsigned int num_regions;
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unsigned int flags;
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} VFIODevice;
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struct VFIODeviceOps {
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void (*vfio_compute_needs_reset)(VFIODevice *vdev);
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int (*vfio_hot_reset_multi)(VFIODevice *vdev);
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void (*vfio_eoi)(VFIODevice *vdev);
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};
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typedef struct VFIOGroup {
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int fd;
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int groupid;
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VFIOContainer *container;
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QLIST_HEAD(, VFIODevice) device_list;
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QLIST_ENTRY(VFIOGroup) next;
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QLIST_ENTRY(VFIOGroup) container_next;
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} VFIOGroup;
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void vfio_put_base_device(VFIODevice *vbasedev);
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void vfio_disable_irqindex(VFIODevice *vbasedev, int index);
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void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index);
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void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index);
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void vfio_region_write(void *opaque, hwaddr addr,
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uint64_t data, unsigned size);
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uint64_t vfio_region_read(void *opaque,
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hwaddr addr, unsigned size);
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int vfio_mmap_region(Object *vdev, VFIORegion *region,
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MemoryRegion *mem, MemoryRegion *submem,
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void **map, size_t size, off_t offset,
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const char *name);
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void vfio_reset_handler(void *opaque);
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VFIOGroup *vfio_get_group(int groupid, AddressSpace *as);
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void vfio_put_group(VFIOGroup *group);
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int vfio_get_device(VFIOGroup *group, const char *name,
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VFIODevice *vbasedev);
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extern const MemoryRegionOps vfio_region_ops;
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extern QLIST_HEAD(vfio_group_head, VFIOGroup) vfio_group_list;
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extern QLIST_HEAD(vfio_as_head, VFIOAddressSpace) vfio_address_spaces;
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#endif /* !HW_VFIO_VFIO_COMMON_H */
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