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| author | Roman Kagan | 2016-02-17 19:25:33 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin | 2016-03-11 13:55:15 +0100 |
| commit | 27b9fc54d23acd8f6829e850a027b3b3878cba37 (patch) | |
| tree | 0af540b43ac9f2404e000836fa96e164064af55e /tests/acpi-test-data | |
| parent | fdc: add function to determine drive chs limits (diff) | |
| download | qemu-27b9fc54d23acd8f6829e850a027b3b3878cba37.tar.gz qemu-27b9fc54d23acd8f6829e850a027b3b3878cba37.tar.xz qemu-27b9fc54d23acd8f6829e850a027b3b3878cba37.zip | |
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 'tests/acpi-test-data')
0 files changed, 0 insertions, 0 deletions