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>

diff --git a/amd-ucode/README b/amd-ucode/README
index fac11524e62e00d6772c1476f736143b221994c9..f47743c1c3ba602d223f75987c623feb49503135 100644 (file)
--- a/amd-ucode/README
+++ b/amd-ucode/README
@@ -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
 NMI observed per physical core. These NMIs are benign and don't cause any
 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