Yaya48
cf256aa081
Upstream: https://gitlab.com/qemu-project/qemu.git Upstream-Commit: d2e570cc0f97b936902a5b1b86b73c0f5998b475
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/*
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* vfio generic region quirks (mostly backdoors to PCI config space)
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*
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* Copyright Red Hat, Inc. 2012-2015
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*
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* Authors:
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* Alex Williamson <[email protected]>
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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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#ifndef HW_VFIO_VFIO_PCI_QUIRKS_H
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#define HW_VFIO_VFIO_PCI_QUIRKS_H
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#include "exec/memop.h"
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/*
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* The generic window quirks operate on an address and data register,
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* vfio_generic_window_address_quirk handles the address register and
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* vfio_generic_window_data_quirk handles the data register. These ops
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* pass reads and writes through to hardware until a value matching the
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* stored address match/mask is written. When this occurs, the data
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* register access emulated PCI config space for the device rather than
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* passing through accesses. This enables devices where PCI config space
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* is accessible behind a window register to maintain the virtualization
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* provided through vfio.
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*/
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typedef struct VFIOConfigWindowMatch {
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uint32_t match;
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uint32_t mask;
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} VFIOConfigWindowMatch;
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typedef struct VFIOConfigWindowQuirk {
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struct VFIOPCIDevice *vdev;
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uint32_t address_val;
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uint32_t address_offset;
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uint32_t data_offset;
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bool window_enabled;
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uint8_t bar;
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MemoryRegion *addr_mem;
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MemoryRegion *data_mem;
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uint32_t nr_matches;
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VFIOConfigWindowMatch matches[];
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} VFIOConfigWindowQuirk;
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extern const MemoryRegionOps vfio_generic_window_address_quirk;
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extern const MemoryRegionOps vfio_generic_window_data_quirk;
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/*
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* The generic mirror quirk handles devices which expose PCI config space
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* through a region within a BAR. When enabled, reads and writes are
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* redirected through to emulated PCI config space. XXX if PCI config space
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* used memory regions, this could just be an alias.
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*/
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typedef struct VFIOConfigMirrorQuirk {
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struct VFIOPCIDevice *vdev;
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uint32_t offset; /* Offset in BAR */
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uint32_t config_offset; /* Offset in PCI config space */
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uint8_t bar;
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MemoryRegion *mem;
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uint8_t data[];
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} VFIOConfigMirrorQuirk;
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extern const MemoryRegionOps vfio_generic_mirror_quirk;
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#endif /* HW_VFIO_VFIO_PCI_QUIRKS_H */
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