platform/x86/intel/pmt: Sapphire Rapids PMT errata fix

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[ Upstream commit bcdfa1f77e ]

On Sapphire Rapids, due to a hardware issue affecting the PUNIT telemetry
region, reads that are not done in QWORD quantities and alignment may
return incorrect data. Use a custom 64-bit copy for this region.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Link: https://lore.kernel.org/r/20221105034228.1376677-1-david.e.box@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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David E. Box 2022-11-04 20:42:28 -07:00 • committed by Greg Kroah-Hartman

parent 83a6823016

commit 32735e24f4

1 changed files with 30 additions and 1 deletions

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drivers/platform/x86/intel/pmt/class.c

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