On Mon, 11 Mar 2019 11:21:18 -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. > > 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. > > ********************* > NOTE: Newer DASD units which initially present as control unit type 3990 may > in > fact really be 2107. Some operating systems may enable 2107 features for these > devices thereby making sense id return a control unit type of 2107. I've added > support for control unit type 2107 so we can ipl from these devices. > ********************* Ugh. I'd have hoped that would have been recognized as A Bad Idea the last time we had a design like that... Does that cu type switch persist over subchannel enable/disable? Subsystem reset? > > Changelog > ========== > v4 > 01/16: s390 vfio-ccw: Add bootindex property and IPLB data > - Adding CCW_DEVTYPE_VIRTIO_NET type. > - s390_get_ccw_device can now accept a NULL devtype argument > - Other minor refactors > > 06/16: s390-bios: Clean up cio.h > - Remove whitespace changes to cmd_orb struct > > 07/16: s390-bios: Decouple channel i/o logic from virtio > - Fix copyright line > > 08/16: s390-bios: Map low core memory > - Remove Lowcore entries >= 0x200 > - Repositioned const keywords > > 09/16: s390-bios: ptr2u32 and u32toptr > - Add assert to ensure pointer being converted to u32 is below 32 bits in > length > - Add missing copyright comment > > 10/16: s390-bios: Support for running format-0/1 channel programs > - basic_sense now calls __do_cio instead of do_cio. Further protection from > infinite recursion. > - __do_cio now asks for retry for subchannel busy case. > - Minor fixups to comments and message wording > - start.S: Formating and register naming cleanups > - Added CU_TYPE_DASD_2107 > > 11/16: s390-bios: cio error handling > - Only print sense data when it is provided > > 15/16: > - Added support for CU_TYPE_DASD_2107 > > 16/16: > - Merged with various earlier patches > > 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: cio error handling > 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 > > MAINTAINERS | 2 + > docs/devel/s390-dasd-ipl.txt | 133 ++++++++++++++ > hw/s390x/ipl.c | 61 +++++-- > hw/s390x/s390-ccw.c | 9 + > hw/vfio/ccw.c | 2 +- > include/hw/s390x/s390-ccw.h | 1 + > include/hw/s390x/vfio-ccw.h | 28 +++ > pc-bios/s390-ccw/Makefile | 2 +- > pc-bios/s390-ccw/cio.c | 423 > +++++++++++++++++++++++++++++++++++++++++++ > pc-bios/s390-ccw/cio.h | 270 +++++++++++++++++++++------ > pc-bios/s390-ccw/dasd-ipl.c | 250 +++++++++++++++++++++++++ > pc-bios/s390-ccw/dasd-ipl.h | 16 ++ > pc-bios/s390-ccw/helper.h | 31 ++++ > pc-bios/s390-ccw/libc.h | 11 ++ > pc-bios/s390-ccw/main.c | 161 ++++++++++------ > pc-bios/s390-ccw/netboot.mak | 2 +- > pc-bios/s390-ccw/netmain.c | 2 + > pc-bios/s390-ccw/s390-arch.h | 103 +++++++++++ > pc-bios/s390-ccw/s390-ccw.h | 10 +- > pc-bios/s390-ccw/start.S | 29 +++ > pc-bios/s390-ccw/virtio.c | 73 ++------ > tests/boot-serial-test.c | 2 +- > 22 files changed, 1425 insertions(+), 196 deletions(-) > create mode 100644 docs/devel/s390-dasd-ipl.txt > create mode 100644 include/hw/s390x/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/helper.h > create mode 100644 pc-bios/s390-ccw/s390-arch.h > > -- > 2.7.4 >
