On Tue, May 26, 2015 at 7:13 PM, Paolo Bonzini <pbonz...@redhat.com> 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
