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x86/microcode: Remove unnecessary paravirt_enabled check

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Commit:

  a18a0f6850 ("x86, microcode: Don't initialize microcode code on paravirt")

added a paravirt test in microcode_init(), primarily to avoid making
mc_bp_resume()->load_ucode_ap()->check_loader_disabled_ap() calls
because on 32-bit kernels this callchain ends up using __pa_nodebug()
macro which is invalid for Xen PV guests.

A subsequent commit:

  fbae4ba8c4 ("x86, microcode: Reload microcode on resume")

eliminated this callchain thus making a18a0f6850 unnecessary.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: david.vrabel@citrix.com
Cc: konrad.wilk@oracle.com
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/1455612202-14414-2-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Boris Ostrovsky 2016-02-16 09:43:19 +01:00 committed by Ingo Molnar
parent b584303261
commit 84aba677f0
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/cpu/microcode/core.c
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@ -623,7 +623,7 @@ int __init microcode_init(void)
struct cpuinfo_x86 *c = &boot_cpu_data;
int error;
if (paravirt_enabled() || dis_ucode_ldr)
if (dis_ucode_ldr)
return -EINVAL;
if (c->x86_vendor == X86_VENDOR_INTEL)