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

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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 <markus@trippelsdorf.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20151120112400.GC4028@pd.tnic
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Borislav Petkov 2015-11-20 12:24:00 +01:00 committed by Ingo Molnar
parent 1ec218373b
commit 2d5be37d68
2 changed files with 1 additions and 2 deletions
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1
arch/x86/kernel/cpu/microcode/core.c
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@ -698,3 +698,4 @@ int __init microcode_init(void)
return error;
}
late_initcall(microcode_init);

2
arch/x86/kernel/setup.c
View File

@ -1250,8 +1250,6 @@ void __init setup_arch(char **cmdline_p)
if (efi_enabled(EFI_BOOT))
efi_apply_memmap_quirks();
#endif
microcode_init();
}
#ifdef CONFIG_X86_32