[SeaBIOS] [BROKEN RFC 0/5] can we enable the qemu debug port for real-mode code?

[Laszlo Ersek]

This series bears witness to my extreme cluelessness. With it I'm only
asking if we can move the hypervisor/platform detection logic to SRCBOTH
code, so that it sets up "PlatformRunningOn" for all of CSM, vgabios,
and "normal" SeaBIOS. The motivation is that running on qemu is now a
requirement for logging to the qemu debug port, and logging to that port
would be nice in all flavors & parts.

The series applies to f8c70b87 ("Add UmbStart,UmbEnd fields to
EFI_COMPATIBILITY16_TABLE") in
<git://git.infradead.org/users/dwmw2/seabios.git>, which is basically
53d2ddd6 ("Minor - move definitions to paravirt.c from paravirt.h") from
<git://github.com/KevinOConnor/seabios.git> plus the following patches
from David:

  eff724e Make Xen one of the top-level build target choices
  60258aa Clean up Kconfig options for CSM
  87f4dca Enable VGA output when settings bochs-specific mode
  5b5356d Fix rom_reserve()/rom_confirm() for CSM oprom dispatch
  6cca1bf Don't calibrate TSC if PMTIMER is already set up
  2468d84 Move find_pmtimer() to ACPI table setup where it logically belongs
  9d8ecac Use find_pmtimer() after copying Xen ACPI tables
  7d95992 Use find_pmtimer() after copying coreboot ACPI tables
  70ac823 Initialise BIOS tables (and hence PMTIMER) early for Coreboot and Xen
  b41a46f Reject non-compliant PCI option ROMs with unaligned PCIR structure
  5c87ddb Unify return path for CSM to go via csm_return()
  f8c70b8 Add UmbStart,UmbEnd fields to EFI_COMPATIBILITY16_TABLE

I got the messages that I wanted, but I probably broke everything in the
process. Another approach would be to replace the runtime
runningOnQEMU() check in putc_debug() with the build-time constant

  (CONFIG_QEMU || (CONFIG_CSM && CONFIG_QEMU_HARDWARE) || CONFIG_XEN)

condition.

Laszlo Ersek (5):
  add .config for CSM testing
  move hypervisor detection to "util.c" (SRCBOTH)
  vga_post(): detect hypervisors for the qemu debug port's sake
  Legacy16InitializeYourself(): detect hypervisors for the qemu debug
    port's sake
  make QEMU_HARDWARE mean "assume virtual hardware"

 src/paravirt.h   |   22 -------------
 src/util.h       |   29 +++++++++++++++++
 src/misc.c       |    2 -
 src/paravirt.c   |   29 +----------------
 src/xen.c        |   30 +----------------
 src/util.c       |   66 ++++++++++++++++++++++++++++++++++++++
 src/apm.c        |    1 -
 src/esp-scsi.c   |    1 -
 src/lsi-scsi.c   |    1 -
 src/output.c     |    1 -
 .config          |   92 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 .gitignore       |    1 -
 src/Kconfig      |    9 +++--
 src/csm.c        |    3 ++
 vgasrc/vgabios.c |    2 +
 15 files changed, 201 insertions(+), 88 deletions(-)
 create mode 100644 .config