From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753833Ab2H0RNA (ORCPT ); Mon, 27 Aug 2012 13:13:00 -0400 Received: from terminus.zytor.com ([198.137.202.10]:34468 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753482Ab2H0RM7 (ORCPT ); Mon, 27 Aug 2012 13:12:59 -0400 Date: Mon, 27 Aug 2012 10:12:47 -0700 From: tip-bot for Fenghua Yu Message-ID: Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, fenghua.yu@intel.com, tglx@linutronix.de, hpa@linux.intel.com Reply-To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, fenghua.yu@intel.com, tglx@linutronix.de, hpa@linux.intel.com In-Reply-To: <1345916488-8355-8-git-send-email-fenghua.yu@intel.com> References: <1345916488-8355-8-git-send-email-fenghua.yu@intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/bsp-hotplug] x86-32, hotplug: Add start_cpu0() entry point to head_32.S Git-Commit-ID: 135dcacd4ceac68aed843d391e29d821878c1cb0 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.6 (terminus.zytor.com [127.0.0.1]); Mon, 27 Aug 2012 10:12:53 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 135dcacd4ceac68aed843d391e29d821878c1cb0 Gitweb: http://git.kernel.org/tip/135dcacd4ceac68aed843d391e29d821878c1cb0 Author: Fenghua Yu AuthorDate: Sat, 25 Aug 2012 10:41:23 -0700 Committer: H. Peter Anvin CommitDate: Sat, 25 Aug 2012 19:26:07 -0700 x86-32, hotplug: Add start_cpu0() entry point to head_32.S start_cpu0() is defined in head_32.S for 32-bit. The function sets up stack and jumps to start_secondary() for CPU0 wake up. Signed-off-by: Fenghua Yu Link: http://lkml.kernel.org/r/1345916488-8355-8-git-send-email-fenghua.yu@intel.com Signed-off-by: H. Peter Anvin --- arch/x86/kernel/head_32.S | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index d42ab17..964f87a 100644 --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -266,6 +266,18 @@ num_subarch_entries = (. - subarch_entries) / 4 jmp default_entry #endif /* CONFIG_PARAVIRT */ +#ifdef CONFIG_HOTPLUG_CPU +/* + * Boot CPU0 entry point. It's called from play_dead(). Everything has been set + * up already except stack. We just set up stack here. Then call + * start_secondary(). + */ +ENTRY(start_cpu0) + movl stack_start, %ecx + movl %ecx, %esp + jmp *(initial_code) +#endif + /* * Non-boot CPU entry point; entered from trampoline.S * We can't lgdt here, because lgdt itself uses a data segment, but