linux-stable.git/arch/x86/kernel/cpu/microcode, branch v4.2

x86/microcode: Correct CPU family related variable types

2015-06-07T13:38:15+00:00

Change the type of variables and function prototypes to be in
alignment with what the x86_*() / __x86_*() family/model
functions return.

Signed-off-by: Andy Shevchenko 
Signed-off-by: Borislav Petkov 
Cc: Andrew Morton 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1433436928-31903-21-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar

x86/microcode: Disable builtin microcode loading on 32-bit for now

2015-06-07T13:38:14+00:00

Andy Shevchenko reported machine freezes when booting latest tip
on 32-bit setups. Problem is, the builtin microcode handling cannot
really work that early, when we haven't even enabled paging.

A proper fix would involve handling that case specially as every
other early 32-bit boot case in the microcode loader and would
require much more involved changes for which it is too late now,
more than a week before the upcoming merge window.

So, disable the builtin microcode loading on 32-bit for now.

Reported-and-tested-by: Andy Shevchenko 
Signed-off-by: Borislav Petkov 
Cc: Andrew Morton 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1433436928-31903-20-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar

x86/microcode/intel: Rename get_matching_sig()

2015-05-18T07:32:37+00:00

... to find_matching_signature() which is exactly what it does.

No functionality change.

Signed-off-by: Borislav Petkov 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Quentin Casasnovas 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1431860101-14847-5-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar

x86/microcode/intel: Simplify get_matching_sig()

2015-05-18T07:32:36+00:00

Unclutter function, make it a bit more readable, drop local
variables.

No functionality change.

Signed-off-by: Borislav Petkov 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Quentin Casasnovas 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1431860101-14847-4-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar

x86/microcode/intel: Simplify update_match_cpu()

2015-05-18T07:32:36+00:00

Drop unreadable macro, deconstruct compound conditional
statement into single ones and return early if they match. Add
comments.

There should be no functionality change resulting from this
patch.

Signed-off-by: Borislav Petkov 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Quentin Casasnovas 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1431860101-14847-3-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar

x86/microcode/intel: Rename get_matching_microcode

2015-05-18T07:32:36+00:00

... to has_newer_microcode() as it does exactly that: checks
whether binary data @mc has newer microcode patch than the
applied one. Move @mc to be the first function arg too.

Signed-off-by: Borislav Petkov 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Quentin Casasnovas 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1431860101-14847-2-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar

x86/cpu/microcode: Zap changelog

2015-05-11T08:27:09+00:00

It is useless at best and git history has it all detailed
anyway. Update copyright while at it.

Signed-off-by: Borislav Petkov 
Cc: Andy Lutomirski 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1431332153-18566-3-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar

x86/microcode: Parse built-in microcode early

2015-05-06T09:24:53+00:00

Apparently, people do build microcode into the kernel image, i.e.
CONFIG_FIRMWARE_IN_KERNEL=y.

Make that work in the early loader which is where microcode should be
preferably loaded anyway.

Note that you need to specify the microcode filename with the path
relative to the toplevel firmware directory (the same like the late
loading method) in CONFIG_EXTRA_FIRMWARE=y so that early loader can
find it.

I.e., something like this (Intel variant):

  CONFIG_FIRMWARE_IN_KERNEL=y
  CONFIG_EXTRA_FIRMWARE="intel-ucode/06-3a-09"
  CONFIG_EXTRA_FIRMWARE_DIR="/lib/firmware/"

While at it, add me to the loader copyright boilerplate.

Signed-off-by: Borislav Petkov 
Cc: Borislav Petkov 
Cc: Daniel J Blueman 
Cc: H. Peter Anvin 
Cc: Thomas Gleixner 
Signed-off-by: Ingo Molnar

x86/microcode/intel: Remove unused @rev arg of get_matching_sig()

2015-05-06T09:24:52+00:00

@rev wasn't used in get_matching_sig(), drop it.

Signed-off-by: Borislav Petkov 
Cc: Borislav Petkov 
Cc: H. Peter Anvin 
Cc: Thomas Gleixner 
Signed-off-by: Ingo Molnar

x86/microcode/intel: Get rid of revision_is_newer()

2015-05-06T09:24:44+00:00

It is a one-liner for checking microcode header revisions. On top of
that, it can be used wrong as it was the case in _save_mc(). Get rid of
it.

Signed-off-by: Borislav Petkov 
Acked-by: Quentin Casasnovas 
Cc: Borislav Petkov 
Cc: H. Peter Anvin 
Cc: Thomas Gleixner 
Signed-off-by: Ingo Molnar