Are systems with Kaby Lake CPU and Sunrise Point PCH supported on RHEL 7.3?

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux 7.3
  • kernel version 3.10.0-514.el7

Issue

  • System with Kaby Lake CPU and Sunrise Point PCH gives warning and taints the kernel.
Warning: Intel Kabylake processor with unknown PCH - this hardware has not undergone testing by Red Hat and might not be certified. Please consult https://hardware.redhat.com for certified hardware.

Resolution

  • The support is added for Kabylake Sunrise Point PCH in kernel-3.10.0-693.el7.x86_64
# rpm -q --changelog kernel-3.10.0-693.el7.x86_64|grep PCH|grep Kaby
- [x86] Mark Kaby Lake with Kaby Lake PCH as supported (David Arcari) [1391219]
- [mfd] lpss: Fix Intel Kaby Lake PCH-H properties (David Arcari) [1391219]
- [x86] Add support for missing Kabylake Sunrise Point PCH (David Arcari) [1379401]  <---
- [i2c] i801: Add support for Kaby Lake PCH-H (David Arcari) [1310953]
- [mfd] lpss: Add Intel Kaby Lake PCH-H PCI IDs (David Arcari) [1310953]
- [drm] i915: Introduce Kabypoint PCH for Kabylake H/DT (Rob Clark) [1348329 1349064]

Root Cause

  • Support was added in private bug 1379401

Diagnostic Steps

  • Snippet from dmesg 
kernel: Unknown Intel PCH (0xa149) detected
kernel: Warning: Intel Kabylake processor with unknown PCH - this hardware has not undergone testing by Red Hat and might not be certified. Please consult https://hardware.redhat.com for certified hardware.

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