From: tip-bot for Fenghua Yu <fenghua.yu@intel.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org,
fenghua.yu@intel.com, tglx@linutronix.de, hpa@linux.intel.com
Subject: [tip:x86/bsp-hotplug] x86-64, hotplug: Add start_cpu0() entry point to head_64.S
Date: Mon, 27 Aug 2012 10:11:51 -0700 [thread overview]
Message-ID: <tip-2e93a931a797f2a7fffceae189fd2b6256b785de@git.kernel.org> (raw)
In-Reply-To: <1345916488-8355-7-git-send-email-fenghua.yu@intel.com>
Commit-ID: 2e93a931a797f2a7fffceae189fd2b6256b785de
Gitweb: http://git.kernel.org/tip/2e93a931a797f2a7fffceae189fd2b6256b785de
Author: Fenghua Yu <fenghua.yu@intel.com>
AuthorDate: Sat, 25 Aug 2012 10:41:22 -0700
Committer: H. Peter Anvin <hpa@linux.intel.com>
CommitDate: Sat, 25 Aug 2012 19:26:06 -0700
x86-64, hotplug: Add start_cpu0() entry point to head_64.S
start_cpu0() is defined in head_64.S for 64-bit. The function sets up stack and
jumps to start_secondary() for CPU0 wake up.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1345916488-8355-7-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---
arch/x86/kernel/head_64.S | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 94bf9cc..3faac8a 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -252,6 +252,21 @@ ENTRY(secondary_startup_64)
pushq %rax # target address in negative space
lretq
+#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)
+ movq stack_start(%rip),%rsp
+ movq initial_code(%rip),%rax
+ pushq $0 # fake return address to stop unwinder
+ pushq $__KERNEL_CS # set correct cs
+ pushq %rax # target address in negative space
+ lretq
+#endif
+
/* SMP bootup changes these two */
__REFDATA
.align 8
next prev parent reply other threads:[~2012-08-27 17:12 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-25 17:41 [PATCH v8 0/12] x86: Arbitrary CPU hot(un)plug support Fenghua Yu
2012-08-25 17:41 ` [PATCH v8 01/12] doc: Add x86 CPU0 online/offline feature Fenghua Yu
2012-08-27 17:07 ` [tip:x86/bsp-hotplug] " tip-bot for Fenghua Yu
2012-08-25 17:41 ` [PATCH v8 02/12] x86, Kconfig: Add config switch for CPU0 hotplug Fenghua Yu
2012-08-27 17:08 ` [tip:x86/bsp-hotplug] " tip-bot for Fenghua Yu
2012-08-25 17:41 ` [PATCH v8 03/12] x86, topology: Don't offline CPU0 if any PIC irq can not be migrated out of it Fenghua Yu
2012-08-27 17:09 ` [tip:x86/bsp-hotplug] x86, topology: Don' t " tip-bot for Fenghua Yu
2012-08-25 17:41 ` [PATCH v8 04/12] x86, hotplug: Support functions for CPU0 online/offline Fenghua Yu
2012-08-27 17:10 ` [tip:x86/bsp-hotplug] " tip-bot for Fenghua Yu
2012-08-25 17:41 ` [PATCH v8 05/12] x86, hotplug, suspend: Online CPU0 for suspend or hibernate Fenghua Yu
2012-08-27 17:10 ` [tip:x86/bsp-hotplug] " tip-bot for Fenghua Yu
2012-08-25 17:41 ` [PATCH v8 06/12] x86-64, hotplug: Add start_cpu0() entry point to head_64.S Fenghua Yu
2012-08-27 17:11 ` tip-bot for Fenghua Yu [this message]
2012-08-25 17:41 ` [PATCH v8 07/12] x86-32, hotplug: Add start_cpu0() entry point to head_32.S Fenghua Yu
2012-08-27 17:12 ` [tip:x86/bsp-hotplug] " tip-bot for Fenghua Yu
2012-08-25 17:41 ` [PATCH v8 08/12] x86, hotplug: Wake up CPU0 via NMI instead of INIT, SIPI, SIPI Fenghua Yu
2012-08-27 17:13 ` [tip:x86/bsp-hotplug] " tip-bot for Fenghua Yu
2012-08-25 17:41 ` [PATCH v8 09/12] x86, hotplug: During CPU0 online, enable x2apic, set_numa_node Fenghua Yu
2012-08-27 17:14 ` [tip:x86/bsp-hotplug] " tip-bot for Fenghua Yu
2012-08-25 17:41 ` [PATCH v8 10/12] x86, hotplug: The first online processor saves the MTRR state Fenghua Yu
2012-08-27 17:15 ` [tip:x86/bsp-hotplug] " tip-bot for Fenghua Yu
2012-08-25 17:41 ` [PATCH v8 11/12] x86/i387.c: Initialize thread xstate only on CPU0 only once Fenghua Yu
2012-08-27 17:16 ` [tip:x86/bsp-hotplug] " tip-bot for Fenghua Yu
2012-08-25 17:41 ` [PATCH v8 12/12] x86, topology: Debug CPU00 hotplug Fenghua Yu
2012-08-27 17:17 ` [tip:x86/bsp-hotplug] x86, topology: Debug CPU0 hotplug tip-bot for Fenghua Yu
2012-09-10 5:50 ` [PATCH v8 0/12] x86: Arbitrary CPU hot(un)plug support Ingo Molnar
2012-11-13 19:32 [PATCH v10 07/14] x86-64, hotplug: Add start_cpu0() entry point to head_64.S Fenghua Yu
2012-11-14 21:27 ` [tip:x86/bsp-hotplug] " tip-bot for Fenghua Yu
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