hw/ide/core.c: Implement ATA INITIALIZE_DEVICE_PARAMETERS command

CHS-based disk utilities and operating systems may adjust the logical
geometry of a hard drive to cope with the expectations or limitations
of software using the ATA INITIALIZE_DEVICE_PARAMETERS command.

Prior to this patch, INITIALIZE_DEVICE_PARAMETERS was a nop that
always returned success, raising the possibility of data loss or
corruption if the CHS<->LBA translation redirected a write to the
wrong sector.

* hw/ide/core.c
ide_reset():
  Reset the logical CHS geometry of the hard disk when the power-on
  defaults feature is enabled.
cmd_specify():
  a) New function implementing INITIALIZE_DEVICE_PARAMETERS.
  b) Ignore calls for empty or ATAPI devices.
cmd_set_features():
  Implement the power-on defaults enable and disable features.
struct ide_cmd_table:
  Switch WIN_SPECIFY from cmd_nop() to cmd_specify().
ide_init_drive():
  Set new fields 'drive_heads' and 'drive_sectors' based upon the
  actual disk geometry.

* include/hw/ide/internal.h
struct IDEState:
a) Store the actual drive CHS values within the new fields
   'drive_heads' and 'drive_sectors.'
b) Track whether a soft IDE reset should also reset the logical CHS
   geometry of the hard disk within the new field 'reset_reverts'.

Signed-off-by: Lev Kujawski <lkujaw@member.fsf.org>
Message-Id: <20220707031140.158958-7-lkujaw@member.fsf.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

0 files changed, 0 insertions, 0 deletions