Hi Linus,
This patchset lets us update the CPU microcode very, very early in
initialization if the BIOS fails to do so (never happens, right?)
This is handy for dealing with things like the Atom erratum where we
have to run without PSE because microcode loading happens too late.
As I mentioned in the x86/mm push request it depends on that
infrastructure but it is otherwise a standalone feature.
----------------------------------------------------------------
The following changes since commit ac2cbab21f318e19bc176a7f38a120cec835220f:
x86: Don't panic if can not alloc buffer for swiotlb (2013-01-29 19:36:53
-0800)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/microcode
for you to fetch changes up to da76f64e7eb28b718501d15c1b79af560b7ca4ea:
x86/Kconfig: Make early microcode loading a configuration feature (2013-01-31
13:20:42 -0800)
----------------------------------------------------------------
Fenghua Yu (12):
x86, doc: Documentation for early microcode loading
x86/microcode_intel.h: Define functions and macros for early loading ucode
x86/common.c: Make have_cpuid_p() a global function
x86/common.c: load ucode in 64 bit or show loading ucode info in 32 bit
on AP
x86/microcode_core_early.c: Define interfaces for early loading ucode
x86/microcode_intel_lib.c: Early update ucode on Intel's CPU
x86/tlbflush.h: Define __native_flush_tlb_global_irq_disabled()
x86/microcode_intel_early.c: Early update ucode on Intel's CPU
x86/head_32.S: Early update ucode in 32-bit
x86/head64.c: Early update ucode in 64-bit
x86/mm/init.c: Copy ucode from initrd image to kernel memory
x86/Kconfig: Make early microcode loading a configuration feature
Documentation/x86/early-microcode.txt | 43 ++
arch/x86/Kconfig | 18 +
arch/x86/include/asm/microcode.h | 14 +
arch/x86/include/asm/microcode_intel.h | 85 ++++
arch/x86/include/asm/processor.h | 8 +
arch/x86/include/asm/tlbflush.h | 18 +-
arch/x86/kernel/Makefile | 3 +
arch/x86/kernel/cpu/common.c | 17 +-
arch/x86/kernel/head64.c | 6 +
arch/x86/kernel/head_32.S | 11 +
arch/x86/kernel/microcode_core.c | 7 +-
arch/x86/kernel/microcode_core_early.c | 76 +++
arch/x86/kernel/microcode_intel.c | 198 ++------
arch/x86/kernel/microcode_intel_early.c | 796 ++++++++++++++++++++++++++++++++
arch/x86/kernel/microcode_intel_lib.c | 174 +++++++
arch/x86/mm/init.c | 10 +
16 files changed, 1301 insertions(+), 183 deletions(-)
[full diff omitted due to length]
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