Commit-ID: 606e20959ef49f22cddb611f2cefef8e6501e3dd
Gitweb: https://git.kernel.org/tip/606e20959ef49f22cddb611f2cefef8e6501e3dd
Author: David Wang <davidwang@xxxxxxxxxxx>
AuthorDate: Thu, 3 May 2018 10:32:45 +0800
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Sun, 13 May 2018 12:06:12 +0200
x86/CPU: Move cpu_detect_cache_sizes() into init_intel_cacheinfo()
There is no point in having the conditional cpu_detect_cache_sizes() call
at the callsite of init_intel_cacheinfo().
Move it into init_intel_cacheinfo() and make init_intel_cacheinfo() void.
[ tglx: Made the init_intel_cacheinfo() void as the return value was
pointless. Adjust changelog accordingly ]
Signed-off-by: David Wang <davidwang@xxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: lukelin@xxxxxxxxxx
Cc: qiyuanwang@xxxxxxxxxxx
Cc: gregkh@xxxxxxxxxxxxxxxxxxx
Cc: brucechang@xxxxxxxxxxxxxxxx
Cc: timguo@xxxxxxxxxxx
Cc: cooperyan@xxxxxxxxxxx
Cc: hpa@xxxxxxxxx
Cc: benjaminpan@xxxxxxxxxxx
Link: https://lkml.kernel.org/r/1525314766-18910-3-git-send-email-davidwang@xxxxxxxxxxx
---
arch/x86/kernel/cpu/cacheinfo.c | 5 +++--
arch/x86/kernel/cpu/cpu.h | 2 +-
arch/x86/kernel/cpu/intel.c | 13 +++----------
3 files changed, 7 insertions(+), 13 deletions(-)
diff --git a/arch/x86/kernel/cpu/cacheinfo.c b/arch/x86/kernel/cpu/cacheinfo.c
index 58d472c84ba2..38354c66df81 100644
--- a/arch/x86/kernel/cpu/cacheinfo.c
+++ b/arch/x86/kernel/cpu/cacheinfo.c
@@ -691,7 +691,7 @@ void init_amd_cacheinfo(struct cpuinfo_x86 *c)
}
}
-unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c)
+void init_intel_cacheinfo(struct cpuinfo_x86 *c)
{
/* Cache sizes */
unsigned int trace = 0, l1i = 0, l1d = 0, l2 = 0, l3 = 0;
@@ -843,7 +843,8 @@ unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c)
c->x86_cache_size = l3 ? l3 : (l2 ? l2 : (l1i+l1d));
- return l2;
+ if (!l2)
+ cpu_detect_cache_sizes(c);
}
static int __cache_amd_cpumap_setup(unsigned int cpu, int index,
diff --git a/arch/x86/kernel/cpu/cpu.h b/arch/x86/kernel/cpu/cpu.h
index efd6ef8ad14e..49bf8a080105 100644
--- a/arch/x86/kernel/cpu/cpu.h
+++ b/arch/x86/kernel/cpu/cpu.h
@@ -51,7 +51,7 @@ extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
extern u32 get_scattered_cpuid_leaf(unsigned int level,
unsigned int sub_leaf,
enum cpuid_regs_idx reg);
-extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
+extern void 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);
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index b54535be254a..615870420be2 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -635,8 +635,6 @@ static void init_intel_misc_features(struct cpuinfo_x86 *c)
static void init_intel(struct cpuinfo_x86 *c)
{
- unsigned int l2 = 0;
-
early_init_intel(c);
intel_workarounds(c);
@@ -659,13 +657,7 @@ static void init_intel(struct cpuinfo_x86 *c)
#endif
}
- l2 = init_intel_cacheinfo(c);
-
- /* Detect legacy cache sizes if init_intel_cacheinfo did not */
- if (l2 == 0) {
- cpu_detect_cache_sizes(c);
- l2 = c->x86_cache_size;
- }
+ init_intel_cacheinfo(c);
if (c->cpuid_level > 9) {
unsigned eax = cpuid_eax(10);
@@ -678,7 +670,8 @@ static void init_intel(struct cpuinfo_x86 *c)
set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
if (boot_cpu_has(X86_FEATURE_DS)) {
- unsigned int l1;
+ unsigned int l1, l2;
+
rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
if (!(l1 & (1<<11)))
set_cpu_cap(c, X86_FEATURE_BTS);
--
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