vfio: selftests: Allow drivers without send_msi() support

Allow drivers that cannot trigger MSI interrupts to leave the send_msi
callback NULL. Add an fcntl_set_msi_nonblock() wrapper that only sets
nonblocking mode when send_msi is available, and update ASSERT_NO_MSI()
to skip when the driver lacks MSI support. The send_msi test SKIPs and
mix_and_match skips the MSI portion per iteration.

Reviewed-by: David Matlack <dmatlack@google.com>
Signed-off-by: Alex Williamson <alex.williamson@nvidia.com>
Signed-off-by: Rubin Du <rubind@nvidia.com>
Link: https://lore.kernel.org/r/20260609232855.3808971-4-rubind@nvidia.com
Signed-off-by: Alex Williamson <alex@shazbot.org>

0 files changed, 0 insertions, 0 deletions