linux-kernel - [PATCH 09/16] x86: cpu common merge display

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Date:	Thu,  4 Sep 2008 20:09:07 -0700
From:	Yinghai Lu <yhlu.kernel@...il.com>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, Yinghai Lu <yhlu.kernel@...il.com>
Subject: [PATCH 09/16] x86: cpu common merge display_cacheinfo

Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>
---
 arch/x86/kernel/cpu/common.c    |    8 ++++++++
 arch/x86/kernel/cpu/common_64.c |   17 +++++++++++++++++
 2 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 2c4bfa2..f919120 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -285,6 +285,10 @@ void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
 		printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
 				edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
 		c->x86_cache_size = (ecx>>24) + (edx>>24);
+#ifdef CONFIG_X86_64
+		/* On K8 L1 TLB is inclusive, so don't count it */
+		c->x86_tlbsize = 0;
+#endif
 	}
 
 	if (n < 0x80000006)	/* Some chips just has a large L1. */
@@ -293,6 +297,9 @@ void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
 	cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
 	l2size = ecx >> 16;
 
+#ifdef CONFIG_X86_64
+	c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
+#else
 	/* do processor-specific cache resizing */
 	if (this_cpu->c_size_cache)
 		l2size = this_cpu->c_size_cache(c, l2size);
@@ -303,6 +310,7 @@ void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
 
 	if (l2size == 0)
 		return;		/* Again, no L2 cache is possible */
+#endif
 
 	c->x86_cache_size = l2size;
 
diff --git a/arch/x86/kernel/cpu/common_64.c b/arch/x86/kernel/cpu/common_64.c
index 2fda109..f7a2d52 100644
--- a/arch/x86/kernel/cpu/common_64.c
+++ b/arch/x86/kernel/cpu/common_64.c
@@ -285,8 +285,10 @@ void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
 		printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
 				edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
 		c->x86_cache_size = (ecx>>24) + (edx>>24);
+#ifdef CONFIG_X86_64
 		/* On K8 L1 TLB is inclusive, so don't count it */
 		c->x86_tlbsize = 0;
+#endif
 	}
 
 	if (n < 0x80000006)	/* Some chips just has a large L1. */
@@ -294,7 +296,22 @@ void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
 
 	cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
 	l2size = ecx >> 16;
+
+#ifdef CONFIG_X86_64
 	c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
+#else
+
+	/* do processor-specific cache resizing */
+	if (this_cpu->c_size_cache)
+		l2size = this_cpu->c_size_cache(c, l2size);
+
+	/* Allow user to override all this if necessary. */
+	if (cachesize_override != -1)
+		l2size = cachesize_override;
+
+	if (l2size == 0)
+		return;		/* Again, no L2 cache is possible */
+#endif
 
 	c->x86_cache_size = l2size;
 
-- 
1.5.4.5

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