lkml.org 
[lkml]   [2018]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v13 1/9] LIB: Introduce a generic PIO mapping method
From
Date
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.
>> > +


\
 
 \ /
  Last update: 2018-02-14 17:16    [W:0.092 / U:0.036 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site