diff options
| author | Yazen Ghannam <yazen.ghannam@amd.com> | 2022-01-17 19:13:28 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-01-23 22:50:18 +0300 |
| commit | 1f52b0aba6fd37653416375cb8a1ca673acf8d5f (patch) | |
| tree | 106ab13872e9b8bff9ea520837bc215399073565 /arch/x86 | |
| parent | e783362eb54cd99b2cac8b3a9aeac942e6f6ac07 (diff) | |
| download | linux-1f52b0aba6fd37653416375cb8a1ca673acf8d5f.tar.xz | |
x86/MCE/AMD: Allow thresholding interface updates after init
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@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220117161328.19148-1-yazen.ghannam@amd.com
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/cpu/mce/amd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c index a1e2f41796dc..9f4b508886dd 100644 --- a/arch/x86/kernel/cpu/mce/amd.c +++ b/arch/x86/kernel/cpu/mce/amd.c @@ -423,7 +423,7 @@ static void threshold_restart_bank(void *_tr) 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); |