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89a2562c5a
With an updated Linux kernel the kernel reprograms the same table entry
in the MSI-X table multiple times. Fortunately it does so with entry
masked (the default.)
The costly part of MSI-X table reprogramming is going out to the host
kernel to update the GSI routing entries. This change makes three
optimisations.
1. If the table entry is unchanged: skip handking updates
2. Only update the GSI routing table if the table entry is unmasked
(this skips extra calls to the ioctl() for reprogramming the
entries.)
3. Only generate a message on entry unmasking if the global MSI-X enable
bit is set.
Fixes: #4273
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
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|---|---|---|
| .. | ||
| bus.rs | ||
| configuration.rs | ||
| device.rs | ||
| lib.rs | ||
| msi.rs | ||
| msix.rs | ||
| vfio_user.rs | ||
| vfio.rs | ||