Re: [PATCH v4 0/5] acpi, clocksource, kvm: add GTDT and ARM memory-mapped timer support

From: Fu Wei
Date: Fri Mar 18 2016 - 00:23:33 EST

Hi Rafael,

Great thanks for your feedback!

On 18 March 2016 at 08:41, Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote:
> On Thursday, March 17, 2016 10:07:30 AM Timur Tabi wrote:
>> fu.wei@xxxxxxxxxx wrote:
>> > From: Fu Wei <fu.wei@xxxxxxxxxx>
>> >
>> > This patchset:
>> > (1)Move some enums and marcos to header file for arm_arch_timer,
>> > improve the pr_* code by defining "pr_fmt(fmt)" in arm_arch_timer.c
>> >
>> > (2)Introduce ACPI GTDT parser: drivers/acpi/gtdt.c
>> > Parse all kinds of timer in GTDT table of ACPI:arch timer,
>> > memory-mapped timer and SBSA Generic Watchdog timer.
>> > This driver can help to simplify all the relevant timer drivers,
>> > and separate all the ACPI GTDT knowledge from them.
>> >
>> > (3)Simplify ACPI code for arch timer in arm_arch_timer.c
>> >
>> > (4)Add memory-mapped timer support in arm_arch_timer.c
>> The SBSA watchdog driver is already in watchdog-next and will be merged
>> into 4.6. These five patches are necessary for the watchdog driver to
>> probe on an ACPI system.
>> I'm guessing since that v4 was posted in the middle of the 4.6 merge
>> window, that these patches won't make it and we'll have to wait until
>> 4.7 (at the earliest)?
> First off, the last version I've seen is the v3. I must have overlooked
> the v4 then, but I don't think it was CCed to linux-acpi (which should
> have happened).

Sorry for this, That is my fault. I updated the script of git-send-email for
sending the v4 patchset, but lost a space between two "--cc". :-(

> Second, these patches require review from multiple maintainers and (or including)
> people who actually know how the GTDT is supposed to be used. I haven't
> seen any responses from any of them yet, so the answer to your question is
> "yes".
> I will have a couple of comments for patch [1/6] (in the v3), but it's
> not been a priority due to the apparent overall lack of interest in this
> series.

Since this device is a generic watchdog for ARM server, it is(will be) used
in a lot of chips. So I think many people are interested in it. They
haven't provided
any feedback, maybe due to my "--cc" mistake, or busy on something
else now. :-(

I would like to learn your comments for patch [1/6] , then improve my
v4, post v5

This patchset includes GTDT and memory-mapped timer patches, because my
memory-mapped timer patches depends on GTDT.
But maybe we can upstream GTDT separately?

any suggestion?

Thanks for your help!

> Thanks,
> Rafael

Best regards,

Fu Wei
Software Engineer
Red Hat Software (Beijing) Co.,Ltd.Shanghai Branch
Ph: +86 21 61221326(direct)
Ph: +86 186 2020 4684 (mobile)
Room 1512, Regus One Corporate Avenue,Level 15,
One Corporate Avenue,222 Hubin Road,Huangpu District,
Shanghai,China 200021