From: Jeremy Linton <jeremy.linton-5wv7dgnIgG8@public.gmane.org>
To: Suravee Suthikulpanit
<Suravee.Suthikulpanit-5C7GfCeVMHo@public.gmane.org>,
"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Cc: "linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org"
<stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org>,
"linux-ci5G2KO2hbZ+pU9mqzGVBQ@public.gmane.org"
<linux-ci5G2KO2hbZ+pU9mqzGVBQ@public.gmane.org>,
"rafael.j.wysocki-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org"
<rafael.j.wysocki-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Catalin Marinas <Catalin.Marinas-5wv7dgnIgG8@public.gmane.org>,
Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
Subject: Re: [PATCH 1/3] Honor ACPI _CCA attribute setting
Date: Fri, 14 Aug 2015 09:12:28 -0500 [thread overview]
Message-ID: <55CDF74C.3050703@arm.com> (raw)
In-Reply-To: <55CD4832.7070301-5C7GfCeVMHo@public.gmane.org>
Hello Suravee,
On 08/13/2015 08:45 PM, Suravee Suthikulpanit wrote:
> On 8/13/15 04:51, Jeremy Linton wrote:
>> ACPI configurations can now mark devices as noncoherent,
>> support that choice.
>
> This change was in my earlier revisions for the original patch series to
> add ACPI CCA support. At the time, this was pushed back since we were
> not sure whether this would be a useful case, and whether such hardware
> exists.
Yes, I was made aware of that conversation during the review here.
Basically, the ARM Juno development platform has a mix of coherent and
noncoherent devices. The EHCI being one of the primary noncoherent
peripherals. Without which, the usefulness of the platform for
developing with an ACPI kernel is limited.
Thanks,
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WARNING: multiple messages have this Message-ID (diff)
From: jeremy.linton@arm.com (Jeremy Linton)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/3] Honor ACPI _CCA attribute setting
Date: Fri, 14 Aug 2015 09:12:28 -0500 [thread overview]
Message-ID: <55CDF74C.3050703@arm.com> (raw)
In-Reply-To: <55CD4832.7070301@amd.com>
Hello Suravee,
On 08/13/2015 08:45 PM, Suravee Suthikulpanit wrote:
> On 8/13/15 04:51, Jeremy Linton wrote:
>> ACPI configurations can now mark devices as noncoherent,
>> support that choice.
>
> This change was in my earlier revisions for the original patch series to
> add ACPI CCA support. At the time, this was pushed back since we were
> not sure whether this would be a useful case, and whether such hardware
> exists.
Yes, I was made aware of that conversation during the review here.
Basically, the ARM Juno development platform has a mix of coherent and
noncoherent devices. The EHCI being one of the primary noncoherent
peripherals. Without which, the usefulness of the platform for
developing with an ACPI kernel is limited.
Thanks,
next prev parent reply other threads:[~2015-08-14 14:12 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-12 21:51 [PATCH 0/3] Enable EHCI-platform driver for use with ACPI Jeremy Linton
2015-08-12 21:51 ` Jeremy Linton
2015-08-12 21:51 ` [PATCH 1/3] Honor ACPI _CCA attribute setting Jeremy Linton
2015-08-12 21:51 ` Jeremy Linton
2015-08-14 1:45 ` Suravee Suthikulpanit
2015-08-14 1:45 ` Suravee Suthikulpanit
[not found] ` <55CD4832.7070301-5C7GfCeVMHo@public.gmane.org>
2015-08-14 13:14 ` Catalin Marinas
2015-08-14 13:14 ` Catalin Marinas
2015-08-14 14:12 ` Jeremy Linton [this message]
2015-08-14 14:12 ` Jeremy Linton
[not found] ` <55CDF74C.3050703-5wv7dgnIgG8@public.gmane.org>
2015-08-18 3:36 ` Huang Shijie
2015-08-18 3:36 ` Huang Shijie
[not found] ` <1439416290-21228-1-git-send-email-jeremy.linton-5wv7dgnIgG8@public.gmane.org>
2015-08-12 21:51 ` [PATCH 2/3] Display a DMA error message Jeremy Linton
2015-08-12 21:51 ` Jeremy Linton
2015-08-13 11:02 ` Hanjun Guo
2015-08-13 11:02 ` Hanjun Guo
[not found] ` <1439416290-21228-3-git-send-email-jeremy.linton-5wv7dgnIgG8@public.gmane.org>
2015-08-13 14:52 ` Alan Stern
2015-08-13 14:52 ` Alan Stern
2015-08-14 21:19 ` Arnd Bergmann
2015-08-14 21:19 ` Arnd Bergmann
2015-08-14 21:44 ` Jeremy Linton
2015-08-14 21:44 ` Jeremy Linton
2015-08-14 21:56 ` Arnd Bergmann
2015-08-14 21:56 ` Arnd Bergmann
2015-08-12 21:51 ` [PATCH 3/3] Add ACPI bindings for the EHCI platform driver Jeremy Linton
2015-08-12 21:51 ` Jeremy Linton
2015-08-13 11:50 ` Hanjun Guo
2015-08-13 11:50 ` Hanjun Guo
2015-08-13 14:45 ` Jeremy Linton
2015-08-13 14:45 ` Jeremy Linton
[not found] ` <1439416290-21228-4-git-send-email-jeremy.linton-5wv7dgnIgG8@public.gmane.org>
2015-08-13 14:53 ` Alan Stern
2015-08-13 14:53 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1508131049001.1277-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2015-08-13 15:13 ` Jeremy Linton
2015-08-13 15:13 ` Jeremy Linton
[not found] ` <55CCB428.1000404-5wv7dgnIgG8@public.gmane.org>
2015-08-18 3:35 ` Huang Shijie
2015-08-18 3:35 ` Huang Shijie
2015-08-13 9:44 ` [PATCH 0/3] Enable EHCI-platform driver for use with ACPI Graeme Gregory
2015-08-13 9:44 ` Graeme Gregory
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