From: John Garry <john.garry@huawei.com>
To: dann frazier <dann.frazier@canonical.com>
Cc: mika.westerberg@linux.intel.com, rafael@kernel.org,
lorenzo.pieralisi@arm.com, rjw@rjwysocki.net,
hanjun.guo@linaro.org, robh+dt@kernel.org, bhelgaas@google.com,
arnd@arndb.de, mark.rutland@arm.com, olof@lixom.net,
andy.shevchenko@gmail.com, robh@kernel.org, joe@perches.com,
benh@kernel.crashing.org, linux-pci@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
linuxarm@huawei.com, minyard@acm.org, devicetree@vger.kernel.org,
linux-arch@vger.kernel.org, rdunlap@infradead.org
Subject: Re: [PATCH v13 1/9] LIB: Introduce a generic PIO mapping method
Date: Wed, 14 Feb 2018 16:13:57 +0000 [thread overview]
Message-ID: <b16db30e-67d3-0469-d8c7-029665702378@huawei.com> (raw)
In-Reply-To: <20180213230551.GA24986@xps13.dannf>
On 13/02/2018 23:05, dann frazier wrote:
>> bool
>> >
>> > +config INDIRECT_PIO
>> > + bool "Access I/O in non-MMIO mode"
>> > + depends on ARM64
>> > + help
>> > + On some platforms where no separate I/O space exists, there are I/O
>> > + hosts which can not be accessed in MMIO mode. Using the logical PIO
>> > + mechanism, the host-local I/O resource can be mapped into system
>> > + logic PIO space shared with MMIO hosts, such as PCI/PCIE, then the
>> > + system can access the I/O devices with the mapped logic PIO through
>> > + I/O accessors.
>> > + This way has a relatively little I/O performance cost. Please make
> grammar nit - s/a relatively/relatively/
>
Fine, thanks
John
> -dann
>
>> > + sure your devices really need this configure item enabled.
>> > +
next prev parent reply other threads:[~2018-02-14 16:13 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-13 17:45 [PATCH v13 0/9] LPC: legacy ISA I/O support John Garry
2018-02-13 17:45 ` [PATCH v13 1/9] LIB: Introduce a generic PIO mapping method John Garry
[not found] ` <1518543933-22456-2-git-send-email-john.garry-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2018-02-13 23:05 ` dann frazier
2018-02-14 16:13 ` John Garry [this message]
2018-02-13 17:45 ` [PATCH v13 2/9] PCI: Remove unused __weak attribute in pci_register_io_range() John Garry
2018-02-13 17:45 ` [PATCH v13 3/9] PCI: Add fwnode handler as input param of pci_register_io_range() John Garry
2018-02-13 17:45 ` [PATCH v13 4/9] PCI: Apply the new generic I/O management on PCI IO hosts John Garry
2018-02-13 22:57 ` dann frazier
2018-02-14 15:42 ` John Garry
2018-02-14 16:05 ` dann frazier
2018-02-13 17:45 ` [PATCH v13 5/9] OF: Add missing I/O range exception for indirect-IO devices John Garry
[not found] ` <1518543933-22456-1-git-send-email-john.garry-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2018-02-13 17:45 ` [PATCH v13 6/9] LPC: Support the LPC host on Hip06/Hip07 with DT bindings John Garry
2018-02-13 17:45 ` [PATCH v13 7/9] ACPI: Translate the I/O range of non-MMIO devices before scanning John Garry
2018-02-14 9:21 ` Rafael J. Wysocki
2018-02-14 12:48 ` John Garry
2018-02-14 13:53 ` Andy Shevchenko
2018-02-14 15:33 ` John Garry
2018-02-14 16:16 ` Andy Shevchenko
2018-02-15 17:07 ` John Garry
[not found] ` <59e5293f-0ea5-12f4-27db-b13bbcf0918b-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2018-02-16 14:42 ` Andy Shevchenko
[not found] ` <CAHp75VeTQg+A9o5Ox-k_9Qx8=JPEnqg1taVjcd8Zd2rfj_TMog-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-02-16 14:48 ` John Garry
2018-02-14 16:16 ` Lorenzo Pieralisi
2018-02-14 16:52 ` John Garry
2018-02-15 11:19 ` John Garry
2018-02-15 11:47 ` Rafael J. Wysocki
[not found] ` <CAJZ5v0jGvo+cutmvi3WSe1JNvQ1UvZhJr1mQ76=8=1E5Gq+iRg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-02-15 12:36 ` Lorenzo Pieralisi
2018-02-15 12:59 ` John Garry
2018-02-15 12:22 ` Andy Shevchenko
[not found] ` <CAHp75VfFKcnUVQwPUxynzp88RXWdV8VEqtXxd0=_Q_GJKO6UpQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-02-15 12:52 ` John Garry
[not found] ` <f7b3de31-46fb-f80e-511e-651fa815bddf-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2018-02-15 12:55 ` Andy Shevchenko
2018-02-13 17:45 ` [PATCH v13 8/9] LPC, ACPI: Add the HISI LPC ACPI support John Garry
2018-02-13 17:45 ` [PATCH v13 9/9] MAINTAINERS: Add maintainer for HiSilicon LPC driver John Garry
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