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Groups > linux.kernel > #1325286
| From | Borislav Petkov <bp@alien8.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 17/17] x86/microcode: Document builtin microcode loading method |
| Date | 2016-02-03 12:50 +0100 |
| Message-ID | <qY46D-1pi-39@gated-at.bofh.it> (permalink) |
| References | <qY3WW-1lI-33@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Borislav Petkov <bp@suse.de> Add some text and an example to Documentation/x86/early-microcode.txt explaining how to build in microcode. Signed-off-by: Borislav Petkov <bp@suse.de> --- Documentation/x86/early-microcode.txt | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/Documentation/x86/early-microcode.txt b/Documentation/x86/early-microcode.txt index d62bea6796da..c956d99cf1de 100644 --- a/Documentation/x86/early-microcode.txt +++ b/Documentation/x86/early-microcode.txt @@ -40,3 +40,28 @@ 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 + +Builtin microcode +================= + +We can also load builtin microcode supplied through the regular firmware +builtin method CONFIG_FIRMWARE_IN_KERNEL. Here's an example: + +CONFIG_FIRMWARE_IN_KERNEL=y +CONFIG_EXTRA_FIRMWARE="intel-ucode/06-3a-09 amd-ucode/microcode_amd_fam15h.bin" +CONFIG_EXTRA_FIRMWARE_DIR="/lib/firmware" + +This basically means, you have the following tree structure locally: + +/lib/firmware/ +|-- amd-ucode +... +| |-- microcode_amd_fam15h.bin +... +|-- intel-ucode +... +| |-- 06-3a-09 +... + +so that the build system can find those files and integrate them into +the final kernel image. The early loader finds them and applies them. -- 2.3.5
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[PATCH 00/17] x86/microcode: Untangle loader from BLK_DEV_INITRD Borislav Petkov <bp@alien8.de> - 2016-02-03 12:40 +0100 [PATCH 02/17] x86/microcode/intel: Make early loader look for builtin microcode too Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 07/17] x86/microcode/intel: Rename local variables of type struct mc_saved_data Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 12/17] x86/microcode/intel: Use *wrmsrl variants Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 10/17] x86/microcode/intel: Move the BUG_ON up and turn it into WARN_ON Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 05/17] x86/microcode: Issue update message only once Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 11/17] x86/microcode/intel: Cleanup apply_microcode_intel() Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 14/17] x86/microcode/intel: Remove unused arg of get_matching_model_microcode() Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 08/17] x86/microcode/intel: Rename mc_saved_count to num_saved Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 04/17] x86/microcode: Remove an unneeded NULL check Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 03/17] x86/microcode: Remove redundant __setup() param parsing Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 17/17] x86/microcode: Document builtin microcode loading method Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 16/17] x86/microcode/AMD: Issue microcode updated message later Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 09/17] x86/microcode/intel: Rename mc_intel variable to mc Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 06/17] x86/microcode/AMD: Drop redundant printk prefix Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 13/17] x86/microcode/intel: Rename mc_saved_in_initrd Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 01/17] x86/microcode: Untangle from BLK_DEV_INITRD Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100 [PATCH 15/17] x86/microcode/intel: Cleanup get_matching_model_microcode() Borislav Petkov <bp@alien8.de> - 2016-02-03 12:50 +0100
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