[PATCH v5 1/3] cpuid: cleanup cpuid_regs definitions

From: He Chen
Date: Wed Nov 09 2016 - 06:31:47 EST

make cpuid_regs more clear and avoid potential name clash.

Signed-off-by: He Chen <he.chen@xxxxxxxxxxxxxxx>
---
arch/x86/events/intel/pt.c | 45 +++++++++++++++++-----------------------
arch/x86/include/asm/processor.h | 11 ++++++++++
arch/x86/kernel/cpu/scattered.c | 28 ++++++++++---------------
arch/x86/kernel/cpuid.c | 4 ----
4 files changed, 41 insertions(+), 47 deletions(-)

diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c
index c5047b8..1c1b9fe 100644
--- a/arch/x86/events/intel/pt.c
+++ b/arch/x86/events/intel/pt.c
@@ -36,13 +36,6 @@ static DEFINE_PER_CPU(struct pt, pt_ctx);

static struct pt_pmu pt_pmu;

-enum cpuid_regs {
- CR_EAX = 0,
- CR_ECX,
- CR_EDX,
- CR_EBX
-};
-
/*
* Capabilities of Intel PT hardware, such as number of address bits or
* supported output schemes, are cached and exported to userspace as "caps"
@@ -64,21 +57,21 @@ static struct pt_cap_desc {
u8 reg;
u32 mask;
} pt_caps[] = {
- PT_CAP(max_subleaf, 0, CR_EAX, 0xffffffff),
- PT_CAP(cr3_filtering, 0, CR_EBX, BIT(0)),
- PT_CAP(psb_cyc, 0, CR_EBX, BIT(1)),
- PT_CAP(ip_filtering, 0, CR_EBX, BIT(2)),
- PT_CAP(mtc, 0, CR_EBX, BIT(3)),
- PT_CAP(ptwrite, 0, CR_EBX, BIT(4)),
- PT_CAP(power_event_trace, 0, CR_EBX, BIT(5)),
- PT_CAP(topa_output, 0, CR_ECX, BIT(0)),
- PT_CAP(topa_multiple_entries, 0, CR_ECX, BIT(1)),
- PT_CAP(single_range_output, 0, CR_ECX, BIT(2)),
- PT_CAP(payloads_lip, 0, CR_ECX, BIT(31)),
- PT_CAP(num_address_ranges, 1, CR_EAX, 0x3),
- PT_CAP(mtc_periods, 1, CR_EAX, 0xffff0000),
- PT_CAP(cycle_thresholds, 1, CR_EBX, 0xffff),
- PT_CAP(psb_periods, 1, CR_EBX, 0xffff0000),
+ PT_CAP(max_subleaf, 0, CPUID_EAX, 0xffffffff),
+ PT_CAP(cr3_filtering, 0, CPUID_EBX, BIT(0)),
+ PT_CAP(psb_cyc, 0, CPUID_EBX, BIT(1)),
+ PT_CAP(ip_filtering, 0, CPUID_EBX, BIT(2)),
+ PT_CAP(mtc, 0, CPUID_EBX, BIT(3)),
+ PT_CAP(ptwrite, 0, CPUID_EBX, BIT(4)),
+ PT_CAP(power_event_trace, 0, CPUID_EBX, BIT(5)),
+ PT_CAP(topa_output, 0, CPUID_ECX, BIT(0)),
+ PT_CAP(topa_multiple_entries, 0, CPUID_ECX, BIT(1)),
+ PT_CAP(single_range_output, 0, CPUID_ECX, BIT(2)),
+ PT_CAP(payloads_lip, 0, CPUID_ECX, BIT(31)),
+ PT_CAP(num_address_ranges, 1, CPUID_EAX, 0x3),
+ PT_CAP(mtc_periods, 1, CPUID_EAX, 0xffff0000),
+ PT_CAP(cycle_thresholds, 1, CPUID_EBX, 0xffff),
+ PT_CAP(psb_periods, 1, CPUID_EBX, 0xffff0000),
};

static u32 pt_cap_get(enum pt_capabilities cap)
@@ -213,10 +206,10 @@ static int __init pt_pmu_hw_init(void)

for (i = 0; i < PT_CPUID_LEAVES; i++) {
cpuid_count(20, i,
- &pt_pmu.caps[CR_EAX + i*PT_CPUID_REGS_NUM],
- &pt_pmu.caps[CR_EBX + i*PT_CPUID_REGS_NUM],
- &pt_pmu.caps[CR_ECX + i*PT_CPUID_REGS_NUM],
- &pt_pmu.caps[CR_EDX + i*PT_CPUID_REGS_NUM]);
+ &pt_pmu.caps[CPUID_EAX + i*PT_CPUID_REGS_NUM],
+ &pt_pmu.caps[CPUID_EBX + i*PT_CPUID_REGS_NUM],
+ &pt_pmu.caps[CPUID_ECX + i*PT_CPUID_REGS_NUM],
+ &pt_pmu.caps[CPUID_EDX + i*PT_CPUID_REGS_NUM]);
}

ret = -ENOMEM;
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 984a7bf..8f6ac5b 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -137,6 +137,17 @@ struct cpuinfo_x86 {
u32 microcode;
};

+struct cpuid_regs {
+ u32 eax, ebx, ecx, edx;
+};
+
+enum cpuid_regs_idx {
+ CPUID_EAX = 0,
+ CPUID_EBX,
+ CPUID_ECX,
+ CPUID_EDX,
+};
+
#define X86_VENDOR_INTEL 0
#define X86_VENDOR_CYRIX 1
#define X86_VENDOR_AMD 2
diff --git a/arch/x86/kernel/cpu/scattered.c b/arch/x86/kernel/cpu/scattered.c
index 1db8dc4..5dbdd0b 100644
--- a/arch/x86/kernel/cpu/scattered.c
+++ b/arch/x86/kernel/cpu/scattered.c
@@ -17,13 +17,6 @@ struct cpuid_bit {
u32 sub_leaf;
};

-enum cpuid_regs {
- CR_EAX = 0,
- CR_ECX,
- CR_EDX,
- CR_EBX
-};
-
void init_scattered_cpuid_features(struct cpuinfo_x86 *c)
{
u32 max_level;
@@ -31,14 +24,14 @@ void init_scattered_cpuid_features(struct cpuinfo_x86 *c)
const struct cpuid_bit *cb;

static const struct cpuid_bit cpuid_bits[] = {
- { X86_FEATURE_INTEL_PT, CR_EBX,25, 0x00000007, 0 },
- { X86_FEATURE_AVX512_4VNNIW, CR_EDX, 2, 0x00000007, 0 },
- { X86_FEATURE_AVX512_4FMAPS, CR_EDX, 3, 0x00000007, 0 },
- { X86_FEATURE_APERFMPERF, CR_ECX, 0, 0x00000006, 0 },
- { X86_FEATURE_EPB, CR_ECX, 3, 0x00000006, 0 },
- { X86_FEATURE_HW_PSTATE, CR_EDX, 7, 0x80000007, 0 },
- { X86_FEATURE_CPB, CR_EDX, 9, 0x80000007, 0 },
- { X86_FEATURE_PROC_FEEDBACK, CR_EDX,11, 0x80000007, 0 },
+ { X86_FEATURE_INTEL_PT, CPUID_EBX,25, 0x00000007, 0 },
+ { X86_FEATURE_AVX512_4VNNIW, CPUID_EDX, 2, 0x00000007, 0 },
+ { X86_FEATURE_AVX512_4FMAPS, CPUID_EDX, 3, 0x00000007, 0 },
+ { X86_FEATURE_APERFMPERF, CPUID_ECX, 0, 0x00000006, 0 },
+ { X86_FEATURE_EPB, CPUID_ECX, 3, 0x00000006, 0 },
+ { X86_FEATURE_HW_PSTATE, CPUID_EDX, 7, 0x80000007, 0 },
+ { X86_FEATURE_CPB, CPUID_EDX, 9, 0x80000007, 0 },
+ { X86_FEATURE_PROC_FEEDBACK, CPUID_EDX,11, 0x80000007, 0 },
{ 0, 0, 0, 0, 0 }
};

@@ -50,8 +43,9 @@ void init_scattered_cpuid_features(struct cpuinfo_x86 *c)
max_level > (cb->level | 0xffff))
continue;

- cpuid_count(cb->level, cb->sub_leaf, &regs[CR_EAX],
- &regs[CR_EBX], &regs[CR_ECX], &regs[CR_EDX]);
+ cpuid_count(cb->level, cb->sub_leaf, &regs[CPUID_EAX],
+ &regs[CPUID_EBX], &regs[CPUID_ECX],
+ &regs[CPUID_EDX]);

if (regs[cb->reg] & (1 << cb->bit))
set_cpu_cap(c, cb->feature);
diff --git a/arch/x86/kernel/cpuid.c b/arch/x86/kernel/cpuid.c
index 2836de3..9095c80 100644
--- a/arch/x86/kernel/cpuid.c
+++ b/arch/x86/kernel/cpuid.c
@@ -46,10 +46,6 @@

static struct class *cpuid_class;

-struct cpuid_regs {
- u32 eax, ebx, ecx, edx;
-};
-
static void cpuid_smp_cpuid(void *cmd_block)
{
struct cpuid_regs *cmd = (struct cpuid_regs *)cmd_block;
--
2.7.4