reverse_cpuid.h File Reference

#include <uapi/asm/kvm.h>
#include <asm/cpufeature.h>
#include <asm/cpufeatures.h>

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Classes
struct	cpuid_reg

Macros
#define	KVM_X86_FEATURE(w, f)   ((w)*32 + (f))
#define	KVM_X86_FEATURE_SGX1   KVM_X86_FEATURE(CPUID_12_EAX, 0)
#define	KVM_X86_FEATURE_SGX2   KVM_X86_FEATURE(CPUID_12_EAX, 1)
#define	KVM_X86_FEATURE_SGX_EDECCSSA   KVM_X86_FEATURE(CPUID_12_EAX, 11)
#define	X86_FEATURE_AVX_VNNI_INT8   KVM_X86_FEATURE(CPUID_7_1_EDX, 4)
#define	X86_FEATURE_AVX_NE_CONVERT   KVM_X86_FEATURE(CPUID_7_1_EDX, 5)
#define	X86_FEATURE_AMX_COMPLEX   KVM_X86_FEATURE(CPUID_7_1_EDX, 8)
#define	X86_FEATURE_PREFETCHITI   KVM_X86_FEATURE(CPUID_7_1_EDX, 14)
#define	X86_FEATURE_INTEL_PSFD   KVM_X86_FEATURE(CPUID_7_2_EDX, 0)
#define	X86_FEATURE_IPRED_CTRL   KVM_X86_FEATURE(CPUID_7_2_EDX, 1)
#define	KVM_X86_FEATURE_RRSBA_CTRL   KVM_X86_FEATURE(CPUID_7_2_EDX, 2)
#define	X86_FEATURE_DDPD_U   KVM_X86_FEATURE(CPUID_7_2_EDX, 3)
#define	KVM_X86_FEATURE_BHI_CTRL   KVM_X86_FEATURE(CPUID_7_2_EDX, 4)
#define	X86_FEATURE_MCDT_NO   KVM_X86_FEATURE(CPUID_7_2_EDX, 5)
#define	KVM_X86_FEATURE_CONSTANT_TSC   KVM_X86_FEATURE(CPUID_8000_0007_EDX, 8)
#define	KVM_X86_FEATURE_PERFMON_V2   KVM_X86_FEATURE(CPUID_8000_0022_EAX, 0)
#define	KVM_X86_TRANSLATE_FEATURE(f)    case X86_FEATURE_##f: return KVM_X86_FEATURE_##f
#define	feature_bit(name)   __feature_bit(X86_FEATURE_##name)

Enumerations
enum	kvm_only_cpuid_leafs {   CPUID_12_EAX = NCAPINTS , CPUID_7_1_EDX , CPUID_8000_0007_EDX , CPUID_8000_0022_EAX ,   CPUID_7_2_EDX , NR_KVM_CPU_CAPS , NKVMCAPINTS = NR_KVM_CPU_CAPS - NCAPINTS }

Functions
static __always_inline void	reverse_cpuid_check (unsigned int x86_leaf)
static __always_inline u32	__feature_translate (int x86_feature)
static __always_inline u32	__feature_leaf (int x86_feature)
static __always_inline u32	__feature_bit (int x86_feature)
static __always_inline struct cpuid_reg	x86_feature_cpuid (unsigned int x86_feature)
static __always_inline u32 *	__cpuid_entry_get_reg (struct kvm_cpuid_entry2 *entry, u32 reg)
static __always_inline u32 *	cpuid_entry_get_reg (struct kvm_cpuid_entry2 *entry, unsigned int x86_feature)
static __always_inline u32	cpuid_entry_get (struct kvm_cpuid_entry2 *entry, unsigned int x86_feature)
static __always_inline bool	cpuid_entry_has (struct kvm_cpuid_entry2 *entry, unsigned int x86_feature)
static __always_inline void	cpuid_entry_clear (struct kvm_cpuid_entry2 *entry, unsigned int x86_feature)
static __always_inline void	cpuid_entry_set (struct kvm_cpuid_entry2 *entry, unsigned int x86_feature)
static __always_inline void	cpuid_entry_change (struct kvm_cpuid_entry2 *entry, unsigned int x86_feature, bool set)

Variables
static const struct cpuid_reg	reverse_cpuid []

Macro Definition Documentation

feature_bit

#define feature_bit

(

name

)

__feature_bit(X86_FEATURE_##name)

Definition at line 156 of file reverse_cpuid.h.

KVM_X86_FEATURE

#define KVM_X86_FEATURE	(		w,
			f
	)		((w)*32 + (f))

Definition at line 37 of file reverse_cpuid.h.

KVM_X86_FEATURE_BHI_CTRL

#define KVM_X86_FEATURE_BHI_CTRL   KVM_X86_FEATURE(CPUID_7_2_EDX, 4)

Definition at line 55 of file reverse_cpuid.h.

KVM_X86_FEATURE_CONSTANT_TSC

#define KVM_X86_FEATURE_CONSTANT_TSC   KVM_X86_FEATURE(CPUID_8000_0007_EDX, 8)

Definition at line 59 of file reverse_cpuid.h.

KVM_X86_FEATURE_PERFMON_V2

#define KVM_X86_FEATURE_PERFMON_V2   KVM_X86_FEATURE(CPUID_8000_0022_EAX, 0)

Definition at line 62 of file reverse_cpuid.h.

KVM_X86_FEATURE_RRSBA_CTRL

#define KVM_X86_FEATURE_RRSBA_CTRL   KVM_X86_FEATURE(CPUID_7_2_EDX, 2)

Definition at line 53 of file reverse_cpuid.h.

KVM_X86_FEATURE_SGX1

#define KVM_X86_FEATURE_SGX1   KVM_X86_FEATURE(CPUID_12_EAX, 0)

Definition at line 40 of file reverse_cpuid.h.

KVM_X86_FEATURE_SGX2

#define KVM_X86_FEATURE_SGX2   KVM_X86_FEATURE(CPUID_12_EAX, 1)

Definition at line 41 of file reverse_cpuid.h.

KVM_X86_FEATURE_SGX_EDECCSSA

#define KVM_X86_FEATURE_SGX_EDECCSSA   KVM_X86_FEATURE(CPUID_12_EAX, 11)

Definition at line 42 of file reverse_cpuid.h.

KVM_X86_TRANSLATE_FEATURE

#define KVM_X86_TRANSLATE_FEATURE

(

f

)

case X86_FEATURE_##f: return KVM_X86_FEATURE_##f

X86_FEATURE_AMX_COMPLEX

#define X86_FEATURE_AMX_COMPLEX   KVM_X86_FEATURE(CPUID_7_1_EDX, 8)

Definition at line 47 of file reverse_cpuid.h.

X86_FEATURE_AVX_NE_CONVERT

#define X86_FEATURE_AVX_NE_CONVERT   KVM_X86_FEATURE(CPUID_7_1_EDX, 5)

Definition at line 46 of file reverse_cpuid.h.

X86_FEATURE_AVX_VNNI_INT8

#define X86_FEATURE_AVX_VNNI_INT8   KVM_X86_FEATURE(CPUID_7_1_EDX, 4)

Definition at line 45 of file reverse_cpuid.h.

X86_FEATURE_DDPD_U

#define X86_FEATURE_DDPD_U   KVM_X86_FEATURE(CPUID_7_2_EDX, 3)

Definition at line 54 of file reverse_cpuid.h.

X86_FEATURE_INTEL_PSFD

#define X86_FEATURE_INTEL_PSFD   KVM_X86_FEATURE(CPUID_7_2_EDX, 0)

Definition at line 51 of file reverse_cpuid.h.

X86_FEATURE_IPRED_CTRL

#define X86_FEATURE_IPRED_CTRL   KVM_X86_FEATURE(CPUID_7_2_EDX, 1)

Definition at line 52 of file reverse_cpuid.h.

X86_FEATURE_MCDT_NO

#define X86_FEATURE_MCDT_NO   KVM_X86_FEATURE(CPUID_7_2_EDX, 5)

Definition at line 56 of file reverse_cpuid.h.

X86_FEATURE_PREFETCHITI

#define X86_FEATURE_PREFETCHITI   KVM_X86_FEATURE(CPUID_7_1_EDX, 14)

Definition at line 48 of file reverse_cpuid.h.

Enumeration Type Documentation

kvm_only_cpuid_leafs

enum kvm_only_cpuid_leafs

Enumerator
CPUID_12_EAX
CPUID_7_1_EDX
CPUID_8000_0007_EDX
CPUID_8000_0022_EAX
CPUID_7_2_EDX
NR_KVM_CPU_CAPS
NKVMCAPINTS

Definition at line 14 of file reverse_cpuid.h.

                          {
    CPUID_12_EAX     = NCAPINTS,
    CPUID_7_1_EDX,
    CPUID_8000_0007_EDX,
    CPUID_8000_0022_EAX,
    CPUID_7_2_EDX,
    NR_KVM_CPU_CAPS,
 
    NKVMCAPINTS = NR_KVM_CPU_CAPS - NCAPINTS,
};

Function Documentation

__cpuid_entry_get_reg()

static __always_inline u32* __cpuid_entry_get_reg ( struct kvm_cpuid_entry2 *  entry, u32  reg  )

static

Definition at line 166 of file reverse_cpuid.h.

{
    switch (reg) {
    case CPUID_EAX:
        return &entry->eax;
    case CPUID_EBX:
        return &entry->ebx;
    case CPUID_ECX:
        return &entry->ecx;
    case CPUID_EDX:
        return &entry->edx;
    default:
        BUILD_BUG();
        return NULL;
    }
}

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__feature_bit()

static __always_inline u32 __feature_bit ( int  x86_feature )

static

Definition at line 148 of file reverse_cpuid.h.

{
    x86_feature = __feature_translate(x86_feature);
 
    reverse_cpuid_check(x86_feature / 32);
    return 1 << (x86_feature & 31);
}

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__feature_leaf()

static __always_inline u32 __feature_leaf ( int  x86_feature )

static

Definition at line 137 of file reverse_cpuid.h.

{
    return __feature_translate(x86_feature) / 32;
}

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__feature_translate()

static __always_inline u32 __feature_translate ( int  x86_feature )

static

Definition at line 119 of file reverse_cpuid.h.

{
#define KVM_X86_TRANSLATE_FEATURE(f)    \
    case X86_FEATURE_##f: return KVM_X86_FEATURE_##f
 
    switch (x86_feature) {
    KVM_X86_TRANSLATE_FEATURE(SGX1);
    KVM_X86_TRANSLATE_FEATURE(SGX2);
    KVM_X86_TRANSLATE_FEATURE(SGX_EDECCSSA);
    KVM_X86_TRANSLATE_FEATURE(CONSTANT_TSC);
    KVM_X86_TRANSLATE_FEATURE(PERFMON_V2);
    KVM_X86_TRANSLATE_FEATURE(RRSBA_CTRL);
    KVM_X86_TRANSLATE_FEATURE(BHI_CTRL);
    default:
        return x86_feature;
    }
}

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cpuid_entry_change()

static __always_inline void cpuid_entry_change ( struct kvm_cpuid_entry2 *  entry, unsigned int  x86_feature, bool  set  )

static

Definition at line 222 of file reverse_cpuid.h.

{
    u32 *reg = cpuid_entry_get_reg(entry, x86_feature);
 
    /*
     * Open coded instead of using cpuid_entry_{clear,set}() to coerce the
     * compiler into using CMOV instead of Jcc when possible.
     */
    if (set)
        *reg |= __feature_bit(x86_feature);
    else
        *reg &= ~__feature_bit(x86_feature);
}

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cpuid_entry_clear()

static __always_inline void cpuid_entry_clear ( struct kvm_cpuid_entry2 *  entry, unsigned int  x86_feature  )

static

Definition at line 206 of file reverse_cpuid.h.

{
    u32 *reg = cpuid_entry_get_reg(entry, x86_feature);
 
    *reg &= ~__feature_bit(x86_feature);
}

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cpuid_entry_get()

static __always_inline u32 cpuid_entry_get ( struct kvm_cpuid_entry2 *  entry, unsigned int  x86_feature  )

static

Definition at line 192 of file reverse_cpuid.h.

{
    u32 *reg = cpuid_entry_get_reg(entry, x86_feature);
 
    return *reg & __feature_bit(x86_feature);
}

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cpuid_entry_get_reg()

static __always_inline u32* cpuid_entry_get_reg ( struct kvm_cpuid_entry2 *  entry, unsigned int  x86_feature  )

static

Definition at line 184 of file reverse_cpuid.h.

{
    const struct cpuid_reg cpuid = x86_feature_cpuid(x86_feature);
 
    return __cpuid_entry_get_reg(entry, cpuid.reg);
}

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cpuid_entry_has()

static __always_inline bool cpuid_entry_has ( struct kvm_cpuid_entry2 *  entry, unsigned int  x86_feature  )

static

Definition at line 200 of file reverse_cpuid.h.

{
    return cpuid_entry_get(entry, x86_feature);
}

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cpuid_entry_set()

static __always_inline void cpuid_entry_set ( struct kvm_cpuid_entry2 *  entry, unsigned int  x86_feature  )

static

Definition at line 214 of file reverse_cpuid.h.

{
    u32 *reg = cpuid_entry_get_reg(entry, x86_feature);
 
    *reg |= __feature_bit(x86_feature);
}

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reverse_cpuid_check()

static __always_inline void reverse_cpuid_check ( unsigned int  x86_leaf )

static

Definition at line 103 of file reverse_cpuid.h.

{
    BUILD_BUG_ON(NR_CPUID_WORDS != NCAPINTS);
    BUILD_BUG_ON(x86_leaf == CPUID_LNX_1);
    BUILD_BUG_ON(x86_leaf == CPUID_LNX_2);
    BUILD_BUG_ON(x86_leaf == CPUID_LNX_3);
    BUILD_BUG_ON(x86_leaf == CPUID_LNX_4);
    BUILD_BUG_ON(x86_leaf == CPUID_LNX_5);
    BUILD_BUG_ON(x86_leaf >= ARRAY_SIZE(reverse_cpuid));
    BUILD_BUG_ON(reverse_cpuid[x86_leaf].function == 0);
}

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x86_feature_cpuid()

static __always_inline struct cpuid_reg x86_feature_cpuid ( unsigned int  x86_feature )

static

Definition at line 158 of file reverse_cpuid.h.

{
    unsigned int x86_leaf = __feature_leaf(x86_feature);
 
    reverse_cpuid_check(x86_leaf);
    return reverse_cpuid[x86_leaf];
}

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Variable Documentation

reverse_cpuid

const struct cpuid_reg reverse_cpuid[]

static

Initial value:

= {
    [CPUID_1_EDX]         = {         1, 0, CPUID_EDX},
    [CPUID_8000_0001_EDX] = {0x80000001, 0, CPUID_EDX},
    [CPUID_8086_0001_EDX] = {0x80860001, 0, CPUID_EDX},
    [CPUID_1_ECX]         = {         1, 0, CPUID_ECX},
    [CPUID_C000_0001_EDX] = {0xc0000001, 0, CPUID_EDX},
    [CPUID_8000_0001_ECX] = {0x80000001, 0, CPUID_ECX},
    [CPUID_7_0_EBX]       = {         7, 0, CPUID_EBX},
    [CPUID_D_1_EAX]       = {       0xd, 1, CPUID_EAX},
    [CPUID_8000_0008_EBX] = {0x80000008, 0, CPUID_EBX},
    [CPUID_6_EAX]         = {         6, 0, CPUID_EAX},
    [CPUID_8000_000A_EDX] = {0x8000000a, 0, CPUID_EDX},
    [CPUID_7_ECX]         = {         7, 0, CPUID_ECX},
    [CPUID_8000_0007_EBX] = {0x80000007, 0, CPUID_EBX},
    [CPUID_7_EDX]         = {         7, 0, CPUID_EDX},
    [CPUID_7_1_EAX]       = {         7, 1, CPUID_EAX},
    [CPUID_12_EAX]        = {0x00000012, 0, CPUID_EAX},
    [CPUID_8000_001F_EAX] = {0x8000001f, 0, CPUID_EAX},
    [CPUID_7_1_EDX]       = {         7, 1, CPUID_EDX},
    [CPUID_8000_0007_EDX] = {0x80000007, 0, CPUID_EDX},
    [CPUID_8000_0021_EAX] = {0x80000021, 0, CPUID_EAX},
    [CPUID_8000_0022_EAX] = {0x80000022, 0, CPUID_EAX},
    [CPUID_7_2_EDX]       = {         7, 2, CPUID_EDX},
}

Definition at line 1 of file reverse_cpuid.h.