On Thu, 5 Jul 2018 13:25:28 -0400 "Jason J. Herne" <jjhe...@linux.ibm.com> wrote:
> This is to support booting from vfio-ccw dasd devices. We basically implement > the real hardware ipl procedure. This allows for booting Linux guests on > vfio-ccw devices. Wow :) > > vfio-ccw's channel program prefetch algorithm complicates ipl because most ipl > channel programs dynamically modify themselves. Details on the ipl process and > how we worked around this issue can be found in docs/devel/s390-dasd-ipl.txt. Yes, that must have been a challenge. Does this work with any dasd? Or did you concentrate on ECKD? (yeah, I'll also read what you sent :) > > Jason J. Herne (15): > s390 vfio-ccw: Add bootindex property and IPLB data > s390-bios: decouple cio setup from virtio > s390-bios: decouple common boot logic from virtio > s390-bios: Extend find_dev() for non-virtio devices > s390-bios: Factor finding boot device out of virtio code path > s390-bios: Clean up cio.h > s390-bios: Decouple channel i/o logic from virtio > s390-bios: Map low core memory > s390-bios: ptr2u32 and u32toptr > s390-bios: Support for running format-0/1 channel programs > s390-bios: Refactor virtio to run channel programs via cio > s390-bios: Use control unit type to determine boot method > s390-bios: Add channel command codes/structs needed for dasd-ipl > s390-bios: Support booting from real dasd device > s390-bios: Use sense ccw to ensure consistent device state at boot > time > > docs/devel/s390-dasd-ipl.txt | 132 +++++++++++++++++++++ > hw/s390x/ipl.c | 15 +++ > hw/s390x/s390-ccw.c | 9 ++ > hw/vfio/ccw.c | 13 +- > hw/vfio/ccw.h | 38 ++++++ > include/hw/s390x/s390-ccw.h | 1 + > pc-bios/s390-ccw/Makefile | 2 +- > pc-bios/s390-ccw/cio.c | 181 ++++++++++++++++++++++++++++ > pc-bios/s390-ccw/cio.h | 150 ++++++++++++++++------- > pc-bios/s390-ccw/dasd-ipl.c | 249 > +++++++++++++++++++++++++++++++++++++++ > pc-bios/s390-ccw/dasd-ipl.h | 16 +++ > pc-bios/s390-ccw/libc.h | 12 ++ > pc-bios/s390-ccw/main.c | 162 ++++++++++++++++--------- > pc-bios/s390-ccw/netmain.c | 1 + > pc-bios/s390-ccw/s390-arch.h | 113 ++++++++++++++++++ > pc-bios/s390-ccw/s390-ccw.h | 9 -- > pc-bios/s390-ccw/virtio-blkdev.c | 1 + > pc-bios/s390-ccw/virtio.c | 46 +------- > 18 files changed, 986 insertions(+), 164 deletions(-) > create mode 100644 docs/devel/s390-dasd-ipl.txt > create mode 100644 hw/vfio/ccw.h > create mode 100644 pc-bios/s390-ccw/cio.c > create mode 100644 pc-bios/s390-ccw/dasd-ipl.c > create mode 100644 pc-bios/s390-ccw/dasd-ipl.h > create mode 100644 pc-bios/s390-ccw/s390-arch.h >
