src/sys/dev/mmcnull, branch release/12.3.0 FreeBSD source tree https://cgit-dev.freebsd.org/src/atom?h=release%2F12.3.0 2017-07-09T17:02:47Z Added mmcnull, an emulated lightweight MMC controller 2017-07-09T17:02:47Z Warner Losh imp@FreeBSD.org 2017-07-09T17:02:47Z urn:sha1:1b99d52f261bfacfb9bb149d33ed6444364ac219 This emulated device attaches to the ISA bus and registers itself as HBA supporting MMC/SD cards. This allows to develop and test MMC XPT and MMC / SDIO peripheral drivers even in the VM such as bhyve. Submitted by: Ilya Babulin