Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752108AbdFUXlK (ORCPT ); Wed, 21 Jun 2017 19:41:10 -0400 Received: from mga11.intel.com ([192.55.52.93]:39667 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750936AbdFUXlJ (ORCPT ); Wed, 21 Jun 2017 19:41:09 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.39,370,1493708400"; d="scan'208";a="1185504313" From: Andi Kleen To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, Andi Kleen Subject: [PATCH 3/5] x86/cpuid: Make clearcpuid an early param Date: Wed, 21 Jun 2017 16:41:04 -0700 Message-Id: <20170621234106.16548-4-andi@firstfloor.org> X-Mailer: git-send-email 2.9.4 In-Reply-To: <20170621234106.16548-1-andi@firstfloor.org> References: <20170621234106.16548-1-andi@firstfloor.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 779 Lines: 26 From: Andi Kleen Make clearcpuid= an early param, to make sure it is parsed before the XSAVE initialization. This allows to modify XSAVE state by clearing specific CPUID bits. Signed-off-by: Andi Kleen --- arch/x86/kernel/cpu/common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 60b7aa6330ed..600e0cf714b9 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -1285,7 +1285,7 @@ static __init int setup_disablecpuid(char *arg) return 1; } -__setup("clearcpuid=", setup_disablecpuid); +early_param("clearcpuid", setup_disablecpuid); #ifdef CONFIG_X86_64 struct desc_ptr idt_descr __ro_after_init = { -- 2.9.4