lkml.org 
[lkml]   [2015]   [Dec]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v2 2/6] arm64: Move kill_cpu_early to smp.c
From
Date
On 01/12/15 17:52, Mark Rutland wrote:
> On Tue, Dec 01, 2015 at 05:38:54PM +0000, Suzuki K. Poulose wrote:
>> On 01/12/15 16:31, Mark Rutland wrote:
>
> [...]
>
>>> We need stuck-in-the-kernel flag to account for CPUs which didn't manage
>>> to turn the MMU on (which are either in the spin-table, or failed when
>>> they were individually onlined).
>>
>> Did you mean to say "turn the MMU off" ?
>
> No, I mean CPUs which were unable to turn the MMU on in the first place.
> Perhaps they entered the spin-table but were never individually onlined,
> perhaps they didn't support the kernel page size, etc.
>
> When CPUs exit the kernel via PSCI they never switch the MMU off within
> the kernel.

OK. So the flag will also be used for CPUs which are stuck-in-the-kernel
with MMU turned on. e.g, a CPU (using spin-table) we try to bring down
in kill_cpu_early(). Correct ?

Thanks
Suzuki



\
 
 \ /
  Last update: 2015-12-01 19:21    [W:0.052 / U:0.996 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site