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
|
|
#define QEMU_MSIX_H
|
|
|
|
#include "qemu-common.h"
|
|
#include "pci.h"
|
|
|
|
int msix_init(PCIDevice *pdev, unsigned short nentries,
|
|
MemoryRegion *bar,
|
|
unsigned bar_nr, unsigned bar_size);
|
|
|
|
void msix_write_config(PCIDevice *pci_dev, uint32_t address,
|
|
uint32_t val, int len);
|
|
|
|
int msix_uninit(PCIDevice *d, MemoryRegion *bar);
|
|
|
|
void msix_save(PCIDevice *dev, QEMUFile *f);
|
|
void msix_load(PCIDevice *dev, QEMUFile *f);
|
|
|
|
int msix_enabled(PCIDevice *dev);
|
|
int msix_present(PCIDevice *dev);
|
|
|
|
uint32_t msix_bar_size(PCIDevice *dev);
|
|
|
|
int msix_vector_use(PCIDevice *dev, unsigned vector);
|
|
void msix_vector_unuse(PCIDevice *dev, unsigned vector);
|
|
void msix_unuse_all_vectors(PCIDevice *dev);
|
|
|
|
void msix_notify(PCIDevice *dev, unsigned vector);
|
|
|
|
void msix_reset(PCIDevice *dev);
|
|
|
|
int msix_set_vector_notifiers(PCIDevice *dev,
|
|
MSIVectorUseNotifier use_notifier,
|
|
MSIVectorReleaseNotifier release_notifier);
|
|
void msix_unset_vector_notifiers(PCIDevice *dev);
|
|
#endif
|