Re: [Qemu-devel] Why *.dsl files exist in qemu project?

[Zhi Yong Wu]

On Tue, May 26, 2015 at 7:13 PM, Paolo Bonzini <address@hidden> wrote:
>
>
> On 26/05/2015 13:06, Zhi Yong Wu wrote:
>> HI,
>>
>> Does anyone know why these *.dsl files exist in qemu project? Since
>> these files are used to define some hardware resource and operation
>> methods tables, i thought that they should be in the bios related
>> project, right?
>>
>> $ls -l hw/i386/*.dsl
>> -rw-rw-r-- 1 admin admin  3872 May 26 10:43 hw/i386/acpi-dsdt-cpu-hotplug.dsl
>> -rw-rw-r-- 1 admin admin  1470 May 26 10:43 hw/i386/acpi-dsdt-dbug.dsl
>> -rw-rw-r-- 1 admin admin 11284 May 26 10:43 hw/i386/acpi-dsdt.dsl
>> -rw-rw-r-- 1 admin admin  1673 May 26 10:43 hw/i386/acpi-dsdt-hpet.dsl
>> -rw-rw-r-- 1 admin admin  3682 May 26 10:43 hw/i386/acpi-dsdt-isa.dsl
>> -rw-rw-r-- 1 admin admin  3826 May 26 10:43 hw/i386/acpi-dsdt-pci-crs.dsl
>> -rw-rw-r-- 1 admin admin 16347 May 26 10:43 hw/i386/q35-acpi-dsdt.dsl
>> -rw-rw-r-- 1 admin admin  2948 May 26 10:43 hw/i386/ssdt-mem.dsl
>> -rw-rw-r-- 1 admin admin 10677 May 26 10:43 hw/i386/ssdt-misc.dsl
>> -rw-rw-r-- 1 admin admin  3490 May 26 10:43 hw/i386/ssdt-pcihp.dsl
>> -rw-rw-r-- 1 admin admin  2351 May 26 10:43 hw/i386/ssdt-proc.dsl
>
> These describe the hardware, which changes as QEMU gets new abilities.
> So QEMU is exporting the ACPI tables to the firmware.  The firmware
> reads them.
>
> This eliminates code duplication: for example OVMF, SeaBIOS, CoreBoot
> and now qboot all can use the same ACPI tables and only implement a very
> small loader (~100 lines of code) based on fw_cfg.
Cool, it is also what i thought, the common stuff exist in qemu for
all bios related projects.

Thanks.

>
> Paolo



-- 
Regards,

Zhi Yong Wu