Rob Bradford 89a2562c5a pci: Optimise MSI-X table programming ...

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>

2022-10-07 09:57:27 -07:00

..

src

pci: Optimise MSI-X table programming

2022-10-07 09:57:27 -07:00

Cargo.toml

build: Bump libc from 0.2.133 to 0.2.134

2022-09-30 01:01:13 +00:00