linux-stable.git/arch/x86/kernel/cpu/microcode, branch linux-4.5.y

x86/microcode: Untangle from BLK_DEV_INITRD

2016-04-12T14:33:09+00:00

commit 5f9c01aa7c49a2d74474d6d879a797b8badf29e6 upstream.

Thomas Voegtle reported that doing oldconfig with a .config which has
CONFIG_MICROCODE enabled but BLK_DEV_INITRD disabled prevents the
microcode loading mechanism from being built.

So untangle it from the BLK_DEV_INITRD dependency so that oldconfig
doesn't turn it off and add an explanatory text to its Kconfig help what
the supported methods for supplying microcode are.

Reported-by: Thomas Voegtle 
Tested-by: Thomas Voegtle 
Signed-off-by: Borislav Petkov 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1454499225-21544-2-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman

x86/microcode/intel: Make early loader look for builtin microcode too

2016-04-12T14:33:09+00:00

commit 264285ac01673e70557c43ecee338ce97c4c0672 upstream.

Set the initrd @start depending on the presence of an initrd. Otherwise,
builtin microcode loading doesn't work as the start is wrong and we're
using it to compute offset to the microcode blobs.

Tested-by: Thomas Voegtle 
Signed-off-by: Borislav Petkov 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1454499225-21544-3-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman

Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-01-12T00:46:20+00:00

Pull x86 cpu updates from Ingo Molnar:
 "The main changes in this cycle were:

   - Improved CPU ID handling code and related enhancements (Borislav
     Petkov)

   - RDRAND fix (Len Brown)"

* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Replace RDRAND forced-reseed with simple sanity check
  x86/MSR: Chop off lower 32-bit value
  x86/cpu: Fix MSR value truncation issue
  x86/cpu/amd, kvm: Satisfy guest kernel reads of IC_CFG MSR
  kvm: Add accessors for guest CPU's family, model, stepping
  x86/cpu: Unify CPU family, model, stepping calculation

x86/cpu: Unify CPU family, model, stepping calculation

2015-11-24T08:15:54+00:00

Add generic functions which calc family, model and stepping from
the CPUID_1.EAX leaf and stick them into the library we have.

Rename those which do call CPUID with the prefix "x86_cpuid" as
suggested by Paolo Bonzini.

No functionality change.

Signed-off-by: Borislav Petkov 
Reviewed-by: Paolo Bonzini 
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/1448273546-2567-2-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar

x86/microcode: Initialize the driver late when facilities are up

2015-11-23T09:39:49+00:00

Running microcode_init() from setup_arch() is a bad idea because
not even kmalloc() is ready at that point and the loader does
all kinds of allocations and init/registration with various
subsystems.

Make it a late initcall when required facilities are initialized
so that the microcode driver initialization can succeed too.

Reported-and-tested-by: Markus Trippelsdorf 
Signed-off-by: Borislav Petkov 
Cc: Andrew Morton 
Cc: Linus Torvalds 
Cc: Paul E. McKenney 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/20151120112400.GC4028@pd.tnic
Signed-off-by: Ingo Molnar

x86/microcode/intel: Move #ifdef DEBUG inside the function

2015-10-21T09:22:12+00:00

... and save us the stub.

Signed-off-by: Borislav Petkov 
Cc: Andy Lutomirski 
Cc: Arjan van de Ven 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Dave Jones 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Len Brown 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Rafael J. Wysocki 
Cc: Thomas Gleixner 
Cc: Tony Luck 
Link: http://lkml.kernel.org/r/1445334889-300-6-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar

x86/microcode/amd: Remove maintainers from comments

2015-10-21T09:22:12+00:00

We have the MAINTAINERS file for that. Also, Andreas doesn't
have the time for this work anymore.

Signed-off-by: Borislav Petkov 
Cc: Andreas Herrmann 
Cc: Andy Lutomirski 
Cc: Arjan van de Ven 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Dave Jones 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Len Brown 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Rafael J. Wysocki 
Cc: Thomas Gleixner 
Cc: Tony Luck 
Link: http://lkml.kernel.org/r/1445334889-300-5-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar

x86/microcode: Remove modularization leftovers

2015-10-21T09:22:12+00:00

Remove the remaining module functionality leftovers. Make
"dis_ucode_ldr" an early_param and make it static again. Drop
module aliases, autoloading table, description, etc.

Bump version number, while at it.

Signed-off-by: Borislav Petkov 
Cc: Andy Lutomirski 
Cc: Arjan van de Ven 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Dave Jones 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Len Brown 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Rafael J. Wysocki 
Cc: Thomas Gleixner 
Cc: Tony Luck 
Link: http://lkml.kernel.org/r/1445334889-300-4-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar

x86/microcode: Merge the early microcode loader

2015-10-21T09:22:12+00:00

Merge the early loader functionality into the driver proper. The
diff is huge but logically, it is simply moving code from the
_early.c files into the main driver.

Signed-off-by: Borislav Petkov 
Cc: Andy Lutomirski 
Cc: Arjan van de Ven 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Dave Jones 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Len Brown 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Rafael J. Wysocki 
Cc: Thomas Gleixner 
Cc: Tony Luck 
Link: http://lkml.kernel.org/r/1445334889-300-3-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar

x86/microcode: Unmodularize the microcode driver

2015-10-21T09:22:11+00:00

Make CONFIG_MICROCODE a bool. It was practically a bool already anyway,
since early loader was forcing it to =y.

Regardless, there's no real reason to have something be a module which
gets built-in on the majority of installations out there. And its not
like there's noticeable change in functionality - we still can load late
microcode - just the module glue disappears.

Signed-off-by: Borislav Petkov 
Cc: Andy Lutomirski 
Cc: Arjan van de Ven 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Dave Jones 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Len Brown 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Rafael J. Wysocki 
Cc: Thomas Gleixner 
Cc: Tony Luck 
Link: http://lkml.kernel.org/r/1445334889-300-2-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar