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linux-firmware: amd-ucode: Add note on fam19h warnings 

When running 5.19+ kernels on Genoa or Bergamo systems, some microcode
patches are known to trigger warnings in the PMI handler. Add a note
to list the required minimum patch levels for addressing this problem.

Signed-off-by: Sandipan Das <sandipan.das@amd.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>
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Sandipan Das 2023-09-14 20:16:51 +05:30 committed by Josh Boyer
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commit d252e92d50
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@ -53,3 +53,12 @@ a32b0f0db3f3 ("x86/microcode/AMD: Load late on both threads too")
When late loading the patches for Genoa or Bergamo, there may be one spurious When late loading the patches for Genoa or Bergamo, there may be one spurious
NMI observed per physical core. These NMIs are benign and don't cause any NMI observed per physical core. These NMIs are benign and don't cause any
functional issue but will result in kernel messages being logged. functional issue but will result in kernel messages being logged.
NOTE: When running 5.19+ kernels on Genoa or Bergamo systems, some microcode
patches are known to trigger warnings in the PMI handler. The following are
the required minimum patch levels to address this problem:
Family=0x19 Model=0x11 Stepping=0x01: Patch=0x0a10113e
Family=0x19 Model=0x11 Stepping=0x02: Patch=0x0a10123e
Family=0x19 Model=0xa0 Stepping=0x01: Patch=0x0aa00116
Family=0x19 Model=0xa0 Stepping=0x02: Patch=0x0aa00212