On Wed, 17 Jan 2024 15:46:32 -0600, Brian King wrote:

Some devices are not capable of addressing 64 bits
via DMA, which includes MSI-X vectors. This allows
us to ensure these devices use MSI-X vectors in
32 bit space.

Applied to powerpc/next.

[1/1] powerpc: Enable support for 32 bit MSI-X vectors
      https://git.kernel.org/powerpc/c/b997bf240ebdfb36de5a138e94b77c3228507f07

cheers