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Re: [Qemu-devel] [RFC PATCH 0/9] hw/acpi: make build_madt arch agnostic
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-devel] [RFC PATCH 0/9] hw/acpi: make build_madt arch agnostic |
Date: |
Tue, 18 Jun 2019 17:59:56 +0200 |
On Mon, 13 May 2019 14:19:04 +0800
Wei Yang <address@hidden> wrote:
> Now MADT is highly depend in architecture and machine type and leaves
> duplicated code in different architecture. The series here tries to generalize
> it.
>
> MADT contains one main table and several sub tables. These sub tables are
> highly related to architecture. Here we introduce one method to make it
> architecture agnostic.
>
> * each architecture define its sub-table implementation function in madt_sub
> * introduces struct madt_input to collect sub table information and pass to
> build_madt
>
> By doing so, each architecture could prepare its own sub-table implementation
> and madt_input. And keep build_madt architecture agnostic.
I've skimmed over patches, and to me it looks mostly as code movement
without apparent benefits and probably a bit more complex than what we have now
(it might be ok cost if it simplifies MADT support for other boards).
Before I do line by line review could you demonstrate what effect new way
to build MADT would have on arm/virt and i386/virt (from NEMU). So it would be
possible to estimate net benefits from new approach?
(PS: it doesn't have to be patches ready for merging, just a dirty hack
that would demonstrate adding MADT for new board using mad_sub[])
>
> Wei Yang (9):
> hw/acpi: expand pc_madt_cpu_entry in place
> hw/acpi: implement madt_sub[ACPI_APIC_PROCESSOR]
> hw/acpi: implement madt_sub[ACPI_APIC_LOCAL_X2APIC]
> hw/acpi: implement madt_sub[ACPI_APIC_IO]
> hw/acpi: implement madt_sub[ACPI_APIC_XRUPT_OVERRIDE]
> hw/acpi: implement madt_sub[ACPI_APIC_LOCAL_X2APIC_NMI]
> hw/acpi: implement madt_sub[ACPI_APIC_LOCAL_NMI]
> hw/acpi: factor build_madt with madt_input
> hw/acpi: implement madt_main to manipulate main madt table
>
> hw/acpi/cpu.c | 14 +-
> hw/acpi/piix4.c | 3 +-
> hw/i386/acpi-build.c | 265 +++++++++++++++++----------
> hw/isa/lpc_ich9.c | 3 +-
> include/hw/acpi/acpi_dev_interface.h | 12 +-
> include/hw/i386/pc.h | 2 +
> 6 files changed, 194 insertions(+), 105 deletions(-)
>
- Re: [Qemu-devel] [RFC PATCH 0/9] hw/acpi: make build_madt arch agnostic, Wei Yang, 2019/06/03
- Re: [Qemu-devel] [RFC PATCH 0/9] hw/acpi: make build_madt arch agnostic,
Igor Mammedov <=
- Re: [Qemu-devel] [RFC PATCH 0/9] hw/acpi: make build_madt arch agnostic, Wei Yang, 2019/06/19
- Re: [Qemu-devel] [RFC PATCH 0/9] hw/acpi: make build_madt arch agnostic, Igor Mammedov, 2019/06/19
- Re: [Qemu-devel] [RFC PATCH 0/9] hw/acpi: make build_madt arch agnostic, Wei Yang, 2019/06/20
- Re: [Qemu-devel] [RFC PATCH 0/9] hw/acpi: make build_madt arch agnostic, Igor Mammedov, 2019/06/20
- Re: [Qemu-devel] [RFC PATCH 0/9] hw/acpi: make build_madt arch agnostic, Wei Yang, 2019/06/20
- Re: [Qemu-devel] [RFC PATCH 0/9] hw/acpi: make build_madt arch agnostic, Igor Mammedov, 2019/06/21
- Re: [Qemu-devel] [RFC PATCH 0/9] hw/acpi: make build_madt arch agnostic, Wei Yang, 2019/06/21