This is a note to let you know that I've just added the patch titled
x86/MCE/AMD: Allow thresholding interface updates after init
to the 5.16-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-mce-amd-allow-thresholding-interface-updates-after-init.patch
and it can be found in the queue-5.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1f52b0aba6fd37653416375cb8a1ca673acf8d5f Mon Sep 17 00:00:00 2001
From: Yazen Ghannam <yazen.ghannam@xxxxxxx>
Date: Mon, 17 Jan 2022 16:13:28 +0000
Subject: x86/MCE/AMD: Allow thresholding interface updates after init
From: Yazen Ghannam <yazen.ghannam@xxxxxxx>
commit 1f52b0aba6fd37653416375cb8a1ca673acf8d5f upstream.
Changes to the AMD Thresholding sysfs code prevents sysfs writes from
updating the underlying registers once CPU init is completed, i.e.
"threshold_banks" is set.
Allow the registers to be updated if the thresholding interface is
already initialized or if in the init path. Use the "set_lvt_off" value
to indicate if running in the init path, since this value is only set
during init.
Fixes: a037f3ca0ea0 ("x86/mce/amd: Make threshold bank setting hotplug robust")
Signed-off-by: Yazen Ghannam <yazen.ghannam@xxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220117161328.19148-1-yazen.ghannam@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/cpu/mce/amd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kernel/cpu/mce/amd.c
+++ b/arch/x86/kernel/cpu/mce/amd.c
@@ -401,7 +401,7 @@ static void threshold_restart_bank(void
u32 hi, lo;
/* sysfs write might race against an offline operation */
- if (this_cpu_read(threshold_banks))
+ if (!this_cpu_read(threshold_banks) && !tr->set_lvt_off)
return;
rdmsr(tr->b->address, lo, hi);
Patches currently in stable-queue which might be from yazen.ghannam@xxxxxxx are
queue-5.16/x86-mce-amd-allow-thresholding-interface-updates-after-init.patch
