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[Qemu-devel] [PATCH 0/4] acpi: move common parts of the SSDT to the DSDT
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 0/4] acpi: move common parts of the SSDT to the DSDT (and preview of things to come) |
Date: |
Wed, 24 Dec 2014 14:12:39 +0100 |
Right now, the SSDT/DSDT is split in three parts:
- code that doesn't need patching goes in the DSDT. Furthermore,
code in this category that is shared between PIIX4 and Q35 is
handled via #include. There was one exception, the SMC._STA
method is patched and is in the DSDT.
- shared code that needs patching goes in the SSDT
- template-based code that comes from command line arguments
goes in the SSDT as well
This series changes things to:
- code that is chipset-specific goes in the DSDT first.
Right now none of this needs patching
- code that is not chipset-specific, some of which needs
patching, goes in the DSDT second
- template-based code that comes from command line arguments
goes in the SSDT
Patch 1 moves ssdt-misc ("common code that needs patching")
to the DSDT. Patches 2-4 stop using the C preprocessor
in the DSDTs.
Patches 5-7 show why this could be useful. They add padding
in fw_cfg after the DSDT, and in exchange stop padding the ACPI
tables to 128K. This fixes migration problems (ROM sizes, RSDP)
because the ACPI tables are split in two:
1) fixed tables and the DSDT can be changed freely;
2) tables that vary depending on the command-line arguments (SSDT,
MADT, ...) are versioned and, given a machine type, they have to be
byte-equivalent across QEMU versions >= 2.3.
Patches 5 and 6 introduce a new sizing algorithm. Patch 7 use it
to fix the migration problems.
Only the first 4 or 6 patches are meant for inclusion. Patch 7 should
only be committed after Igor's series that rewrites the templating
mechanism in C. That makes it much simpler to track changes to the ACPI
tables, and removes dependencies on the IASL version that could cause
some head-scratching.
The conflicts with Igor's series are nontrivial but overall
not complicated to solve. Igor rewrote ssdt-misc in C, but those
parts can be easily removed from his series. He has plans to
build the DSDT from C, and if that materializes it can apply to
acpi-dsdt-common.dsl too.
Paolo
Paolo Bonzini (7):
pc: append ssdt-misc.dsl to the DSDT
pc: rename ssdt-misc to dsdt-common
pc: move common parts of the DSDT to dsdt-common
pc: merge DSDT common parts into acpi-dsdt-common.dsl
pc: introduce new ACPI table sizing algorithm
pc: clean up pre-2.1 compatibility code
pc: go back to smaller ACPI tables
hw/i386/Makefile.objs | 2 +-
hw/i386/acpi-build.c | 107 +++--
hw/i386/acpi-dsdt-common.dsl | 467 +++++++++++++++++++++
...ex.generated => acpi-dsdt-common.hex.generated} | 4 +-
hw/i386/acpi-dsdt-dbug.dsl | 41 --
hw/i386/acpi-dsdt-hpet.dsl | 48 ---
hw/i386/acpi-dsdt-isa.dsl | 128 ------
hw/i386/acpi-dsdt-mem-hotplug.dsl | 176 --------
hw/i386/acpi-dsdt.dsl | 12 +-
hw/i386/pc_piix.c | 9 +-
hw/i386/pc_q35.c | 6 +-
hw/i386/q35-acpi-dsdt.dsl | 9 +-
hw/i386/ssdt-misc.dsl | 122 ------
include/hw/i386/pc.h | 2 +
14 files changed, 550 insertions(+), 583 deletions(-)
create mode 100644 hw/i386/acpi-dsdt-common.dsl
rename hw/i386/{ssdt-misc.hex.generated => acpi-dsdt-common.hex.generated}
(96%)
delete mode 100644 hw/i386/acpi-dsdt-dbug.dsl
delete mode 100644 hw/i386/acpi-dsdt-hpet.dsl
delete mode 100644 hw/i386/acpi-dsdt-isa.dsl
delete mode 100644 hw/i386/acpi-dsdt-mem-hotplug.dsl
delete mode 100644 hw/i386/ssdt-misc.dsl
--
1.8.3.1
- [Qemu-devel] [PATCH 0/4] acpi: move common parts of the SSDT to the DSDT (and preview of things to come),
Paolo Bonzini <=
- [Qemu-devel] [PATCH 3/4] pc: move common parts of the DSDT to dsdt-common, Paolo Bonzini, 2014/12/24
- [Qemu-devel] [PATCH 1/4] pc: append ssdt-misc.dsl to the DSDT, Paolo Bonzini, 2014/12/24
- [Qemu-devel] [PATCH 4/4] pc: merge DSDT common parts into acpi-dsdt-common.dsl, Paolo Bonzini, 2014/12/24
- [Qemu-devel] [PATCH 5/4] pc: introduce new ACPI table sizing algorithm, Paolo Bonzini, 2014/12/24
- [Qemu-devel] [PATCH 2/4] pc: rename ssdt-misc to dsdt-common, Paolo Bonzini, 2014/12/24
- [Qemu-devel] [PATCH 6/4] pc: clean up pre-2.1 compatibility code, Paolo Bonzini, 2014/12/24
- [Qemu-devel] [PATCH 7/4] pc: go back to smaller ACPI tables, Paolo Bonzini, 2014/12/24
- Re: [Qemu-devel] [PATCH 0/4] acpi: move common parts of the SSDT to the DSDT (and preview of things to come), Paolo Bonzini, 2014/12/24
- Re: [Qemu-devel] [PATCH 0/4] acpi: move common parts of the SSDT to the DSDT (and preview of things to come), Michael S. Tsirkin, 2014/12/24