x86/mce: Set bios_cmci_threshold for CMCI threshold

zhaoxin inclusion category: bugfix CVE: NA ----------------- In the Linux kernel, the CMCI threshold is set to 1 by default. This patch prevents Linux from overwriting the CMCI threshold set by the bios. With this patch, the CMCI threshold can be set through the BIOS, which can also avoid CMCI storms, on Zhaoxin/Centaur CPUs. Signed-off-by: leoliu-oc <[email protected]>
deepin-community · Jun 15, 2024 · 66015fc · 66015fc
1 parent 6e2eada
commit 66015fc
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
@@ -1946,6 +1946,7 @@ static int __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
 			if (cfg->monarch_timeout < 0)
 				cfg->monarch_timeout = USEC_PER_SEC;
 		}
+		mca_cfg.bios_cmci_threshold = 1;
 	}
 
 	if (cfg->monarch_timeout < 0)