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Add stream ID to MSI write

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GICv3 ITS distinguishes between devices by using hardwired device IDs passed on the bus.
This patch implements passing these IDs in qemu.
SMMU is also known to use stream IDs, therefore this addition can also be useful for
implementing platforms with SMMU.

Signed-off-by: Pavel Fedin <p.fedin@samsung.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>

 Changes from v1:
- Added bus number to the stream ID
- Added stream ID not only to MSI-X, but also to plain MSI. Some common code was made into
msi_send_message() function.
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Pavel Fedin 2015-05-27 15:59:59 +03:00 • committed by Michael S. Tsirkin
parent c3bdc56c18
commit 38d40ff10f
4 changed files with 13 additions and 3 deletions
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3
hw/pci/msix.c
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@ -443,8 +443,7 @@ void msix_notify(PCIDevice *dev, unsigned vector)
msg = msix_get_message(dev, vector);
address_space_stl_le(&dev->bus_master_as, msg.address, msg.data,
MEMTXATTRS_UNSPECIFIED, NULL);
msi_send_message(dev, msg);
}
void msix_reset(PCIDevice *dev)