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Revision 932d4a42

ID932d4a42afa28829fadf3cbfbb0507cc09aafd8b

Added by Alexey Kardashevskiy almost 12 years ago

msi/msix: added API to set MSI message address and data

Added (msi|msix)_set_message() function for whoever might
want to use them.

Currently msi_notify()/msix_notify() write to these vectors to
signal the guest about an interrupt so the correct values have to
written there by the guest or QEMU.

For example, POWER guest never initializes MSI/MSIX vectors, instead
it uses RTAS hypercalls. So in order to support MSIX for virtio-pci on
POWER we have to initialize MSI/MSIX message from QEMU.

Signed-off-by: Alexey Kardashevskiy <>
Signed-off-by: Michael S. Tsirkin <>

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