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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-02 16:28:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-02 16:28:10 -0700 |
| commit | fdd78889aad2ec85b2f5a8ed232215dca7a22a3b (patch) | |
| tree | d99e66e9afe26bebf89204d15443c42b9345bc21 /Documentation | |
| parent | d652df0b2f0b9c2e655be0d6f90989fae0a511b4 (diff) | |
| parent | 9608d33b8210c993af4430d661a6474946480c9b (diff) | |
| download | linux-fdd78889aad2ec85b2f5a8ed232215dca7a22a3b.tar.bz2 | |
Merge branch 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 microcode loading update from Ingo Molnar:
"Two main changes that improve microcode loading on AMD CPUs:
- Add support for all-in-one binary microcode files that concatenate
the microcode images of multiple processor families, by Jacob Shin
- Add early microcode loading (embedded in the initrd) support, also
by Jacob Shin"
* 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, microcode, amd: Another early loading fixup
x86, microcode, amd: Allow multiple families' bin files appended together
x86, microcode, amd: Make find_ucode_in_initrd() __init
x86, microcode, amd: Fix warnings and errors on with CONFIG_MICROCODE=m
x86, microcode, amd: Early microcode patch loading support for AMD
x86, microcode, amd: Refactor functions to prepare for early loading
x86, microcode: Vendor abstract out save_microcode_in_initrd()
x86, microcode, intel: Correct typo in printk
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/x86/early-microcode.txt | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/Documentation/x86/early-microcode.txt b/Documentation/x86/early-microcode.txt index 4aaf0dfb0cb8..d62bea6796da 100644 --- a/Documentation/x86/early-microcode.txt +++ b/Documentation/x86/early-microcode.txt @@ -11,7 +11,8 @@ file and loaded to CPUs during boot time. The format of the combined initrd image is microcode in cpio format followed by the initrd image (maybe compressed). Kernel parses the combined initrd image during boot time. The microcode file in cpio name space is: -kernel/x86/microcode/GenuineIntel.bin +on Intel: kernel/x86/microcode/GenuineIntel.bin +on AMD : kernel/x86/microcode/AuthenticAMD.bin During BSP boot (before SMP starts), if the kernel finds the microcode file in the initrd file, it parses the microcode and saves matching microcode in memory. @@ -34,10 +35,8 @@ original initrd image /boot/initrd-3.5.0.img. mkdir initrd cd initrd -mkdir kernel -mkdir kernel/x86 -mkdir kernel/x86/microcode -cp ../microcode.bin kernel/x86/microcode/GenuineIntel.bin -find .|cpio -oc >../ucode.cpio +mkdir -p kernel/x86/microcode +cp ../microcode.bin kernel/x86/microcode/GenuineIntel.bin (or AuthenticAMD.bin) +find . | cpio -o -H newc >../ucode.cpio cd .. cat ucode.cpio /boot/initrd-3.5.0.img >/boot/initrd-3.5.0.ucode.img |