lkml.org 
[lkml]   [2020]   [Apr]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC PATCH 19/26] x86/alternatives: NMI safe runtime patching
On Tue, Apr 07, 2020 at 10:03:16PM -0700, Ankur Arora wrote:
> @@ -1807,12 +1911,20 @@ static int __maybe_unused text_poke_late(patch_worker_t worker, void *stage)
> text_poke_state.state = PATCH_SYNC_DONE; /* Start state */
> text_poke_state.primary_cpu = smp_processor_id();
>
> + text_poke_state.nmi_context = nmi;
> +
> + if (nmi)
> + register_nmi_handler(NMI_LOCAL, text_poke_nmi,
> + NMI_FLAG_FIRST, "text_poke_nmi");
> /*
> * Run the worker on all online CPUs. Don't need to do anything
> * for offline CPUs as they come back online with a clean cache.
> */
> ret = stop_machine(patch_worker, &text_poke_state, cpu_online_mask);
>
> + if (nmi)
> + unregister_nmi_handler(NMI_LOCAL, "text_poke_nmi");
> +
> return ret;
> }

This is completely bonghits crazy.

\
 
 \ /
  Last update: 2020-04-08 13:37    [W:0.136 / U:0.520 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site