linux-kernel - [PATCH 2/4] x86: Add a BSP cpu

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Message-Id: <1320405995-10199-2-git-send-email-bp@amd64.org>
Date:	Fri,  4 Nov 2011 12:26:33 +0100
From:	Borislav Petkov <bp@...64.org>
To:	linux-stable <stable@...r.kernel.org>
Cc:	Greg Kroah-Hartman <greg@...ah.com>, X86-ML <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/4] x86: Add a BSP cpu_dev helper

Upstream commit: a110b5ec7371592eac856ac5c22dc7b518952d44

Add a function ptr to struct cpu_dev which is destined to be run only
once on the BSP during boot.

Signed-off-by: Borislav Petkov <borislav.petkov@....com>
Link: http://lkml.kernel.org/r/20110805180116.GB26217@aftab
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/kernel/cpu/common.c |    3 +++
 arch/x86/kernel/cpu/cpu.h    |    1 +
 2 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 6218439..ec63df5 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -681,6 +681,9 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
 	filter_cpuid_features(c, false);
 
 	setup_smep(c);
+
+	if (this_cpu->c_bsp_init)
+		this_cpu->c_bsp_init(c);
 }
 
 void __init early_cpu_init(void)
diff --git a/arch/x86/kernel/cpu/cpu.h b/arch/x86/kernel/cpu/cpu.h
index e765633..1b22dcc 100644
--- a/arch/x86/kernel/cpu/cpu.h
+++ b/arch/x86/kernel/cpu/cpu.h
@@ -18,6 +18,7 @@ struct cpu_dev {
 	struct		cpu_model_info c_models[4];
 
 	void            (*c_early_init)(struct cpuinfo_x86 *);
+	void		(*c_bsp_init)(struct cpuinfo_x86 *);
 	void		(*c_init)(struct cpuinfo_x86 *);
 	void		(*c_identify)(struct cpuinfo_x86 *);
 	unsigned int	(*c_size_cache)(struct cpuinfo_x86 *, unsigned int);
-- 
1.7.8.rc0

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