diff options
| author | Roman Kagan <rkagan@virtuozzo.com> | 2016-02-17 21:25:33 +0300 |
|---|---|---|
| committer | Timothy Pearson <tpearson@raptorengineering.com> | 2019-11-29 19:49:36 -0600 |
| commit | 36d9d0e96338c8da01fde950b890982ca76c7d3e (patch) | |
| tree | 77fe882e24b080d245c66d5253d88f05458aea0b /hw/intc/apic.c | |
| parent | 65b99bc529dd598bad89e8ea0a5e01b8e05fcad1 (diff) | |
| download | hqemu-36d9d0e96338c8da01fde950b890982ca76c7d3e.zip hqemu-36d9d0e96338c8da01fde950b890982ca76c7d3e.tar.gz | |
i386: populate floppy drive information in DSDT
On x86-based systems Linux determines the presence and the type of
floppy drives via a query of a CMOS field. So does SeaBIOS when
populating the return data for int 0x13 function 0x08.
However Windows doesn't do it. Instead, it requests this information
from BIOS via int 0x13/0x08 or through ACPI objects _FDE (Floppy Drive
Enumerate) and _FDI (Floppy Drive Information) of the floppy controller
object. On UEFI systems only ACPI-based detection is supported.
QEMU doesn't provide those objects in its ACPI tables and as a result
floppy drives are invisible to Windows on UEFI/OVMF.
This patch adds those objects to the floppy controller in DSDT,
populating them with the information from respective QEMU objects.
Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Marcel Apfelbaum <marcel@redhat.com>
Cc: John Snow <jsnow@redhat.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Kevin O'Connor <kevin@koconnor.net>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/intc/apic.c')
0 files changed, 0 insertions, 0 deletions
