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    SubjectRe: [PATCH v3 00/17] Introduce ACPI for ARM64 based on ACPI 5.1
    On Thu, Sep 11, 2014 at 3:23 PM, Rafael J. Wysocki <rjw@rjwysocki.net> wrote:
    > On Thursday, September 11, 2014 02:29:34 PM Grant Likely wrote:
    >> On Mon, 1 Sep 2014 22:57:38 +0800, Hanjun Guo <hanjun.guo@linaro.org> wrote:
    >> > ACPI 5.1 has been released and now be freely available for
    >> > download [1]. It fixed some major gaps to run ACPI on ARM,
    >> > this patch just follow the ACPI 5.1 spec and prepare the
    >> > code to run ACPI on ARM64.
    >> >
    >> > ACPI 5.1 has some major changes for the following tables and
    >> > method which are essential for ARM platforms:
    >> > 1) MADT table updates.
    >> > 2) FADT updates for PSCI
    >> > 3) GTDT
    >> >
    >> > This patch set is the ARM64 ACPI core patches covered MADT, FADT
    >> > and GTDT, platform board specific drivers are not covered by this
    >> > patch set, but we provide drivers for Juno to boot with ACPI only
    >> > in the follwing patch set for review purpose.
    >> >
    >> > We first introduce acpi.c and its related head file which are needed
    >> > by ACPI core, and then get RSDP to extract all the ACPI boot-time tables.
    >> > When all the boot-time tables (FADT, MADT, GTDT) are ready, then
    >> > parse them to init the sytem when booted. Specifically,
    >> > a) we use FADT to init PSCI and use PSCI to boot SMP;
    >> > b) Use MADT for GIC init and SMP init;
    >> > c) GTDT for arch timer init.
    >> >
    >> > This patch set is based on 3.17-rc2 and was tested by Graeme on Juno
    >> > and FVP base model boot with ACPI only OK, if you want to test them,
    >> > you can pull from acpi-5.1-v3 branch in leg/acpi repo:
    >> > git://git.linaro.org/leg/acpi/acpi.git
    >> >
    >> > Updates since v2:
    >> > - Refactor the code to make SMP/PSCI init with less sperated init
    >> > path by Tomasz
    >> > - make ACPI depend on EXPERT
    >> > - Address lots of comments from Catalin, Sudeep, Geoff
    >> > - Add Juno device ACPI driver patches for review
    >> >
    >> > Updates since v1:
    >> > - Set ACPI default off on ARM64 suggested by Olof;
    >> > - Rebase the patch set on top of linux-next branch/linux-pm tree which
    >> > includes the ACPICA for full ACPI 5.1 support.
    >> > - Update the document as suggested;
    >> > - Adress lots of comments from Mark, Sudeep, Randy, Naresh, Olof, Geoff
    >> > and more...
    >> >
    >> > [1]: http://www.uefi.org/sites/default/files/resources/ACPI_5_1release.pdf
    >>
    >> I've read through this entire series now. In my mind, aside from a few
    >> comments that I know you're addressing, this is ready. The hooks into
    >> arm64 core code are not terribly invasive, it is nicely organized and
    >> manageable. Get the next version out ASAP, but I would also like to see
    >> the diffs from this version to the next so I don't need to review the
    >> entire series again.
    >>
    >> Regarding the requests to refactor ACPICA to work better for ARM. I
    >> completely agree that it should be done, but I do not think it should be
    >> a prerequisite to getting this core support merged. That kind of
    >> refactoring is far easier to justify when it has immediate improvement
    >> on the mainline codebase, and it gives us a working baseline to test
    >> against. Doing it the other way around just makes things harder.
    >>
    >> I would really like to see the next version of this series go into
    >> linux-next. I think this is ready for some wider exposure. Have you got
    >> a branch being pulled into Fengguang's autobuilder yet?
    >
    > Having looked at the patches recently, I don't see any major problems in
    > them from the ACPI core perspective, so to me they are good to go.
    >
    > Question is who's going to handle them?

    They should absolutely go via Catalin & Will's tree.

    g.


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