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There were several different ways to deal with the situation where the vector specified for a msix function is out of bound: - early return a function and keep progresssing - propagate the error to the caller - mark msix unusable - assert it is in bound - just ignore An out-of-bound vector should not be specified if the device implementation is correct so let msix functions always assert that the specified vector is in range. An exceptional case is virtio-pci, which allows the guest to configure vectors. For virtio-pci, it is more appropriate to introduce its own checks because it is sometimes too late to check the vector range in msix functions. Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Message-Id: <20220829083524.143640-1-akihiko.odaki@daynix.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Yuval Shaia <yuval.shaia.ml@gmail.com> Signed-off-by: Akihiko Odaki <<a href="mailto:akihiko.odaki@daynix.com" target="_blank">akihiko.odaki@daynix.com</a>><br>
66 lines
2.5 KiB
C
66 lines
2.5 KiB
C
#ifndef QEMU_MSIX_H
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#define QEMU_MSIX_H
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#include "hw/pci/pci.h"
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#define MSIX_CAP_LENGTH 12
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void msix_set_message(PCIDevice *dev, int vector, MSIMessage msg);
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MSIMessage msix_get_message(PCIDevice *dev, unsigned int vector);
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int msix_init(PCIDevice *dev, unsigned short nentries,
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MemoryRegion *table_bar, uint8_t table_bar_nr,
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unsigned table_offset, MemoryRegion *pba_bar,
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uint8_t pba_bar_nr, unsigned pba_offset, uint8_t cap_pos,
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Error **errp);
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int msix_init_exclusive_bar(PCIDevice *dev, unsigned short nentries,
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uint8_t bar_nr, Error **errp);
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void msix_write_config(PCIDevice *dev, uint32_t address, uint32_t val, int len);
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void msix_uninit(PCIDevice *dev, MemoryRegion *table_bar,
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MemoryRegion *pba_bar);
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void msix_uninit_exclusive_bar(PCIDevice *dev);
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unsigned int msix_nr_vectors_allocated(const PCIDevice *dev);
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void msix_save(PCIDevice *dev, QEMUFile *f);
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void msix_load(PCIDevice *dev, QEMUFile *f);
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int msix_enabled(PCIDevice *dev);
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int msix_present(PCIDevice *dev);
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bool msix_is_masked(PCIDevice *dev, unsigned vector);
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void msix_set_pending(PCIDevice *dev, unsigned vector);
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void msix_clr_pending(PCIDevice *dev, int vector);
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void msix_vector_use(PCIDevice *dev, unsigned vector);
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void msix_vector_unuse(PCIDevice *dev, unsigned vector);
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void msix_unuse_all_vectors(PCIDevice *dev);
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void msix_set_mask(PCIDevice *dev, int vector, bool mask);
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void msix_notify(PCIDevice *dev, unsigned vector);
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void msix_reset(PCIDevice *dev);
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int msix_set_vector_notifiers(PCIDevice *dev,
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MSIVectorUseNotifier use_notifier,
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MSIVectorReleaseNotifier release_notifier,
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MSIVectorPollNotifier poll_notifier);
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void msix_unset_vector_notifiers(PCIDevice *dev);
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extern const VMStateDescription vmstate_msix;
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#define VMSTATE_MSIX_TEST(_field, _state, _test) { \
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.name = (stringify(_field)), \
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.size = sizeof(PCIDevice), \
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.vmsd = &vmstate_msix, \
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.flags = VMS_STRUCT, \
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.offset = vmstate_offset_value(_state, _field, PCIDevice), \
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.field_exists = (_test) \
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}
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#define VMSTATE_MSIX(_f, _s) \
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VMSTATE_MSIX_TEST(_f, _s, NULL)
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#endif
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