gve: make IRQ handlers and page allocation NUMA aware

All memory in GVE is currently allocated without regard for the NUMA
node of the device. Because access to NUMA-local memory access is
significantly cheaper than access to a remote node, this change attempts
to ensure that page frags used in the RX path, including page pool
frags, are allocated on the NUMA node local to the gVNIC device. Note
that this attempt is best-effort. If necessary, the driver will still
allocate non-local memory, as __GFP_THISNODE is not passed. Descriptor
ring allocations are not updated, as dma_alloc_coherent handles that.

This change also modifies the IRQ affinity setting to only select CPUs
from the node local to the device, preserving the behavior that TX and
RX queues of the same index share CPU affinity.

Signed-off-by: Bailey Forrest <bcf@google.com>
Signed-off-by: Joshua Washington <joshwash@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Harshitha Ramamurthy <hramamurthy@google.com>
Signed-off-by: Jeroen de Borst <jeroendb@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250707210107.2742029-1-jeroendb@google.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>