linux-kernel - [PATCH -v3 3/3] x86, AMD: Move BSP code to cpuinit helper

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Message-Id: <1312469918-6641-4-git-send-email-bp@amd64.org>
Date:	Thu,  4 Aug 2011 16:58:38 +0200
From:	Borislav Petkov <bp@...64.org>
To:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Avi Kivity <avi@...hat.com>,
	Andre Przywara <Andre.Przywara@....com>,
	Martin Pohlack <Martin.Pohlack@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Borislav Petkov <borislav.petkov@....com>
Subject: [PATCH -v3 3/3] x86, AMD: Move BSP code to cpuinit helper

From: Borislav Petkov <borislav.petkov@....com>

Move code which is run once on the BSP during boot into the cpuinit
helper.

Signed-off-by: Borislav Petkov <borislav.petkov@....com>
---
 arch/x86/kernel/cpu/amd.c |   55 +++++++++++++++++++++++---------------------
 1 files changed, 29 insertions(+), 26 deletions(-)

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 5a48cac..8e2d6f8 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -410,6 +410,34 @@ static void __cpuinit early_init_amd_mc(struct cpuinfo_x86 *c)
 #endif
 }
 
+static void __cpuinit amd_run_on_bsp(void)
+{
+	struct cpuinfo_x86 *c = &boot_cpu_data;
+
+	if (static_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
+
+		if (c->x86 > 0x10 ||
+		    (c->x86 == 0x10 && c->x86_model >= 0x2)) {
+			u64 val;
+
+			rdmsrl(MSR_K7_HWCR, val);
+			if (!(val & BIT(24)))
+				printk(KERN_WARNING FW_BUG "TSC doesn't count "
+					"with P0 frequency!\n");
+		}
+	}
+
+	if (c->x86 == 0x15) {
+		u32 cpuid, assoc;
+
+		cpuid = cpuid_edx(0x80000005);
+		assoc = cpuid >> 16 & 0xff;
+
+		align_upperbit = ((cpuid >> 24) << 10) / assoc;
+		align_va_addr  = ALIGN_VA_32 | ALIGN_VA_64;
+	}
+}
+
 static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
 {
 	early_init_amd_mc(c);
@@ -442,32 +470,7 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
 	}
 #endif
 
-	/* We need to do the following only once */
-	if (c != &boot_cpu_data)
-		return;
-
-	if (cpu_has(c, X86_FEATURE_CONSTANT_TSC)) {
-
-		if (c->x86 > 0x10 ||
-		    (c->x86 == 0x10 && c->x86_model >= 0x2)) {
-			u64 val;
-
-			rdmsrl(MSR_K7_HWCR, val);
-			if (!(val & BIT(24)))
-				printk(KERN_WARNING FW_BUG "TSC doesn't count "
-					"with P0 frequency!\n");
-		}
-	}
-
-	if (c->x86 == 0x15) {
-		u32 cpuid, assoc;
-
-		cpuid = cpuid_edx(0x80000005);
-		assoc = cpuid >> 16 & 0xff;
-
-		align_upperbit = ((cpuid >> 24) << 10) / assoc;
-		align_va_addr  = ALIGN_VA_32 | ALIGN_VA_64;
-	}
+	x86_cpuinit.run_on_bsp = amd_run_on_bsp;
 }
 
 static void __cpuinit init_amd(struct cpuinfo_x86 *c)
-- 
1.7.4.rc2

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