2cdfe53c5f
Vector notifiers shall be triggered by the MSI/MSI-X core whenever a relevant configuration change is programmed by the guest. In case of MSI-X, changes are reported when the effective mask (global && per-vector) alters its state. On unmask, the current vector configuration is included in the event report. This allows users - e.g. virtio-pci layer - to transfer this information to external MSI-X routing subsystems - like vhost + KVM in-kernel irqchip. This implementation only provides MSI-X support, but extension to MSI is feasible and will be provided later on when adding support for KVM PCI device assignment. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
37 lines
1 KiB
C
37 lines
1 KiB
C
#ifndef QEMU_MSIX_H
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#define QEMU_MSIX_H
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#include "qemu-common.h"
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#include "pci.h"
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int msix_init(PCIDevice *pdev, unsigned short nentries,
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MemoryRegion *bar,
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unsigned bar_nr, unsigned bar_size);
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void msix_write_config(PCIDevice *pci_dev, uint32_t address,
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uint32_t val, int len);
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int msix_uninit(PCIDevice *d, MemoryRegion *bar);
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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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uint32_t msix_bar_size(PCIDevice *dev);
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int 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_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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void msix_unset_vector_notifiers(PCIDevice *dev);
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#endif
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