From: Yazen Ghannam yazen.ghannam@amd.com
mainline inclusion from mainline-v5.6-rc1 commit 9f6aef86315ac31481a288ba1b3f43b2aac93757 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4MKP4 CVE: NA
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MCA error decoding on SMCA systems is not dependent on family. Return success early if the system supports the SMCA feature.
Signed-off-by: Yazen Ghannam yazen.ghannam@amd.com Signed-off-by: Borislav Petkov bp@suse.de Link: https://lkml.kernel.org/r/20200110015651.14887-3-Yazen.Ghannam@amd.com Signed-off-by: Jackie Liu liuyun01@kylinos.cn Signed-off-by: Laibin Qiu qiulaibin@huawei.com --- drivers/edac/mce_amd.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c index c605089d899f..b2838d774d12 100644 --- a/drivers/edac/mce_amd.c +++ b/drivers/edac/mce_amd.c @@ -1067,6 +1067,11 @@ static int __init mce_amd_init(void) if (!fam_ops) return -ENOMEM;
+ if (boot_cpu_has(X86_FEATURE_SMCA)) { + xec_mask = 0x3f; + goto out; + } + switch (c->x86) { case 0xf: fam_ops->mc0_mce = k8_mc0_mce; @@ -1115,11 +1120,8 @@ static int __init mce_amd_init(void)
case 0x17: case 0x18: - xec_mask = 0x3f; - if (!boot_cpu_has(X86_FEATURE_SMCA)) { - printk(KERN_WARNING "Decoding supported only on Scalable MCA processors.\n"); - goto err_out; - } + pr_warn("Decoding supported only on Scalable MCA processors.\n"); + goto err_out; break;
default: @@ -1127,6 +1129,7 @@ static int __init mce_amd_init(void) goto err_out; }
+out: pr_info("MCE: In-kernel MCE decoding enabled.\n");
mce_register_decode_chain(&amd_mce_dec_nb);