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Fix incorrect hardware errors reported on Zen3 CPUs, such

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as bogus L3 cache deferred errors. (Yazen Ghannam)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'ras-urgent-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 MCE fix from Ingo Molnar:
 "Fix incorrect hardware errors reported on Zen3 CPUs, such as bogus
  L3 cache deferred errors (Yazen Ghannam)"

* tag 'ras-urgent-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mce/amd: Filter bogus hardware errors on Zen3 clients
This commit is contained in:
Linus Torvalds 2026-04-12 08:27:09 -07:00
commit d71358127c
1 changed files with 8 additions and 0 deletions
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8
arch/x86/kernel/cpu/mce/amd.c
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@ -604,6 +604,14 @@ bool amd_filter_mce(struct mce *m)
enum smca_bank_types bank_type = smca_get_bank_type(m->extcpu, m->bank);
struct cpuinfo_x86 *c = &boot_cpu_data;
/* Bogus hw errors on Cezanne A0. */
if (c->x86 == 0x19 &&
c->x86_model == 0x50 &&
c->x86_stepping == 0x0) {
if (!(m->status & MCI_STATUS_EN))
return true;
}
/* See Family 17h Models 10h-2Fh Erratum #1114. */
if (c->x86 == 0x17 &&
c->x86_model >= 0x10 && c->x86_model <= 0x2F &&