linux-kernel - [PATCH 1/3] x86/CPU: Replace intel_num_cpu_cores with detect_num_cpu

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1525314766-18910-2-git-send-email-davidwang@zhaoxin.com>
Date:   Thu, 3 May 2018 10:32:44 +0800
From:   David Wang <davidwang@...oxin.com>
To:     <tglx@...utronix.de>, <mingo@...hat.com>, <hpa@...or.com>,
        <gregkh@...uxfoundation.org>, <x86@...nel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <brucechang@...-alliance.com>, <cooperyan@...oxin.com>,
        <qiyuanwang@...oxin.com>, <benjaminpan@...tech.com>,
        <lukelin@...cpu.com>, <timguo@...oxin.com>,
        David Wang <davidwang@...oxin.com>
Subject: [PATCH 1/3] x86/CPU: Replace intel_num_cpu_cores with detect_num_cpu_cores

intel_num_cpu_cores() is a static defination in intel.c which can't be used by 
other files. Define another function called detect_num_cpu_cores() in common.c
to replace this function.

Signed-off-by: David Wang <davidwang@...oxin.com>
---
 arch/x86/include/asm/processor.h |  1 +
 arch/x86/kernel/cpu/common.c     | 14 ++++++++++++++
 arch/x86/kernel/cpu/intel.c      | 20 +-------------------
 3 files changed, 16 insertions(+), 19 deletions(-)

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index e56fe7c..b0553f6 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -192,6 +192,7 @@ extern u32 get_scattered_cpuid_leaf(unsigned int level,
 				    enum cpuid_regs_idx reg);
 extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
 extern void init_amd_cacheinfo(struct cpuinfo_x86 *c);
+extern int detect_num_cpu_cores(struct cpuinfo_x86 *c);
 
 extern void detect_extended_topology(struct cpuinfo_x86 *c);
 extern void detect_ht(struct cpuinfo_x86 *c);
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 8a5b185..0c80d50 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -577,6 +577,20 @@ static void get_model_name(struct cpuinfo_x86 *c)
 	*(s + 1) = '\0';
 }
 
+int detect_num_cpu_cores(struct cpuinfo_x86 *c)
+{
+	unsigned int eax, ebx, ecx, edx;
+
+	if (!IS_ENABLED(CONFIG_SMP) || c->cpuid_level < 4)
+		return 1;
+
+	cpuid_count(4, 0, &eax, &ebx, &ecx, &edx);
+	if (eax & 0x1f)
+		return (eax >> 26) + 1;
+	else
+		return 1;
+}
+
 void cpu_detect_cache_sizes(struct cpuinfo_x86 *c)
 {
 	unsigned int n, dummy, ebx, ecx, edx, l2size;
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 60d1897..f683f7d 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -453,24 +453,6 @@ static void srat_detect_node(struct cpuinfo_x86 *c)
 #endif
 }
 
-/*
- * find out the number of processor cores on the die
- */
-static int intel_num_cpu_cores(struct cpuinfo_x86 *c)
-{
-	unsigned int eax, ebx, ecx, edx;
-
-	if (!IS_ENABLED(CONFIG_SMP) || c->cpuid_level < 4)
-		return 1;
-
-	/* Intel has a non-standard dependency on %ecx for this CPUID level. */
-	cpuid_count(4, 0, &eax, &ebx, &ecx, &edx);
-	if (eax & 0x1f)
-		return (eax >> 26) + 1;
-	else
-		return 1;
-}
-
 static void detect_vmx_virtcap(struct cpuinfo_x86 *c)
 {
 	/* Intel VMX MSR indicated features */
@@ -671,7 +653,7 @@ static void init_intel(struct cpuinfo_x86 *c)
 		 * let's use the legacy cpuid vector 0x1 and 0x4 for topology
 		 * detection.
 		 */
-		c->x86_max_cores = intel_num_cpu_cores(c);
+		c->x86_max_cores = detect_num_cpu_cores(c);
 #ifdef CONFIG_X86_32
 		detect_ht(c);
 #endif
-- 
1.9.1