lkml.org 
[lkml]   [2022]   [Jun]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v2 7/9] driver core: Set fw_devlink.strict=1 by default
On Wed, Jun 22, 2022 at 9:40 PM Saravana Kannan <saravanak@google.com> wrote:

> Actually, why isn't earlyconsole being used? That doesn't get blocked
> on anything and the main point of that is to have console working from
> really early on.

For Arm (arch/arm) there is a special low-level debug option call low-level
debug, which you find in e.g:
arch/arm/Kconfig.debug
arch/arm/kernel/debug.S

This debug facility can print to the UART fifo before even MMU is up, pretty
much from the first instruction the kernel executes.

The versatility of LL-debug means that developers do not use earlyconsole
much on Arm.

I don't know about arm64 though.

Yours,
Linus Walleij

\
 
 \ /
  Last update: 2022-06-28 15:11    [W:0.198 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site