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cpu-feature: Support Via Padlock security features

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This commit is contained in:
Martin Willi
2015-04-13 15:31:58 +02:00
parent f155880eda
commit 793851856b
2 changed files with 56 additions and 0 deletions
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src/libstrongswan/utils/cpu_feature.c
+45
View File
@@ -30,6 +30,18 @@ typedef enum {
CPUID1_ECX_AESNI = (1 << 25),
CPUID1_ECX_AVX = (1 << 28),
CPUID1_ECX_RDRAND = (1 << 30),
/* For CentaurHauls cpuid(0xC0000001) */
CPUIDC1_EDX_RNG_AVAILABLE = (1 << 2),
CPUIDC1_EDX_RNG_ENABLED = (1 << 3),
CPUIDC1_EDX_ACE_AVAILABLE = (1 << 6),
CPUIDC1_EDX_ACE_ENABLED = (1 << 7),
CPUIDC1_EDX_ACE2_AVAILABLE = (1 << 8),
CPUIDC1_EDX_ACE2_ENABLED = (1 << 9),
CPUIDC1_EDX_PHE_AVAILABLE = (1 << 10),
CPUIDC1_EDX_PHE_ENABLED = (1 << 11),
CPUIDC1_EDX_PMM_AVAILABLE = (1 << 12),
CPUIDC1_EDX_PMM_ENABLED = (1 << 13),
} cpuid_flag_t;
/**
@@ -61,6 +73,30 @@ static inline cpu_feature_t f2f(u_int reg, cpuid_flag_t flag, cpu_feature_t f)
return 0;
}
/**
* Get features for a Via "CentaurHauls" CPU
*/
static cpu_feature_t get_via_features()
{
cpu_feature_t f = 0;
u_int a, b, c, d;
cpuid(0xc0000001, &a, &b, &c, &d);
f |= f2f(d, CPUIDC1_EDX_RNG_AVAILABLE, CPU_FEATURE_PADLOCK_RNG_AVAILABLE);
f |= f2f(d, CPUIDC1_EDX_RNG_ENABLED, CPU_FEATURE_PADLOCK_RNG_ENABLED);
f |= f2f(d, CPUIDC1_EDX_ACE_AVAILABLE, CPU_FEATURE_PADLOCK_ACE_AVAILABLE);
f |= f2f(d, CPUIDC1_EDX_ACE_ENABLED, CPU_FEATURE_PADLOCK_ACE_ENABLED);
f |= f2f(d, CPUIDC1_EDX_ACE2_AVAILABLE, CPU_FEATURE_PADLOCK_ACE2_AVAILABLE);
f |= f2f(d, CPUIDC1_EDX_ACE2_ENABLED, CPU_FEATURE_PADLOCK_ACE2_ENABLED);
f |= f2f(d, CPUIDC1_EDX_PHE_AVAILABLE, CPU_FEATURE_PADLOCK_PHE_AVAILABLE);
f |= f2f(d, CPUIDC1_EDX_PHE_ENABLED, CPU_FEATURE_PADLOCK_PHE_ENABLED);
f |= f2f(d, CPUIDC1_EDX_PMM_AVAILABLE, CPU_FEATURE_PADLOCK_PMM_AVAILABLE);
f |= f2f(d, CPUIDC1_EDX_PMM_ENABLED, CPU_FEATURE_PADLOCK_PMM_ENABLED);
return f;
}
/**
* See header.
*/
@@ -89,6 +125,15 @@ cpu_feature_t cpu_feature_get_all()
f |= f2f(c, CPUID1_ECX_AVX, CPU_FEATURE_AVX);
f |= f2f(c, CPUID1_ECX_RDRAND, CPU_FEATURE_RDRAND);
if (streq(vendor, "CentaurHauls"))
{
cpuid(0xc0000000, &a, &b, &c, &d);
/* check Centaur Extended Feature Flags */
if (a >= 0xc0000001)
{
f |= get_via_features();
}
}
return f;
}
src/libstrongswan/utils/cpu_feature.h
+11
View File
@@ -36,6 +36,17 @@ typedef enum {
CPU_FEATURE_RDRAND = (1 << 8),
CPU_FEATURE_AESNI = (1 << 9),
CPU_FEATURE_PCLMULQDQ = (1 << 10),
/** Via Padlock Security features */
CPU_FEATURE_PADLOCK_RNG_AVAILABLE = (1 << 22),
CPU_FEATURE_PADLOCK_RNG_ENABLED = (1 << 23),
CPU_FEATURE_PADLOCK_ACE_AVAILABLE = (1 << 24),
CPU_FEATURE_PADLOCK_ACE_ENABLED = (1 << 25),
CPU_FEATURE_PADLOCK_ACE2_AVAILABLE = (1 << 26),
CPU_FEATURE_PADLOCK_ACE2_ENABLED = (1 << 27),
CPU_FEATURE_PADLOCK_PHE_AVAILABLE = (1 << 28),
CPU_FEATURE_PADLOCK_PHE_ENABLED = (1 << 29),
CPU_FEATURE_PADLOCK_PMM_AVAILABLE = (1 << 30),
CPU_FEATURE_PADLOCK_PMM_ENABLED = (1 << 31),
} cpu_feature_t;
/**