tree 60413af0bbe1fff8afdc35f36719e8150d78b7af
parent 7eff7ded02d1b15ba8321664839b353fa6c0c1e4
author H. Peter Anvin <hpa@linux.intel.com> 1366414563 -0700
committer H. Peter Anvin <hpa@linux.intel.com> 1366414563 -0700

x86, microcode: Verify the family before dispatching microcode patching

For each CPU vendor that implements CPU microcode patching, there will
be a minimum family for which this is implemented.  Verify this
minimum level of support.

This can be done in the dispatch function or early in the application
functions.  Doing the latter turned out to be somewhat awkward because
of the ineviable split between the BSP and the AP paths, and rather
than pushing deep into the application functions, do this in
the dispatch function.

Reported-by: "Bryan O'Donoghue" <bryan.odonoghue.lkml@nexus-software.ie>
Suggested-by: Borislav Petkov <bp@alien8.de>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1366392183-4149-1-git-send-email-bryan.odonoghue.lkml@nexus-software.ie