x86, microcode, AMD: Fix early ucode loading

Browse source

The original idea to use the microcode cache for the APs doesn't pan out
because we do memory allocation there very early and with IRQs disabled
and we don't want to involve GFP_ATOMIC allocations. Not if it can be
helped.

Thus, extend the caching of the BSP patch approach to the APs and
iterate over the ucode in the initrd instead of using the cache. We
still save the relevant patches to it but later, right before we
jettison the initrd.

While at it, fix early ucode loading on 32-bit too.

Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>

...

This commit is contained in:

Borislav Petkov 2013-11-29 14:58:44 +01:00

parent e1b43e3f13

commit 5335ba5cf4

3 changed files with 170 additions and 89 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

7

arch/x86/include/asm/microcode_amd.h

View file

13

arch/x86/kernel/microcode_amd.c

View file

241

arch/x86/kernel/microcode_amd_early.c

View file