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target-i386: Add PKU and and OSPKE support

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Add PKU and OSPKE CPUID features, including xsave state and
migration support.

Signed-off-by: Huaitong Han <huaitong.han@intel.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
[ehabkost: squashed 3 patches together, edited patch description]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Huaitong Han 2015-11-18 10:20:15 +08:00 committed by Eduardo Habkost
parent 36f96c4b6b
commit f74eefe0b9
4 changed files with 56 additions and 1 deletions
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23
target-i386/cpu.c
View File

@ -263,6 +263,17 @@ static const char *cpuid_7_0_ebx_feature_name[] = {
"clwb", NULL, "avx512pf", "avx512er", "avx512cd", NULL, NULL, NULL,
};
static const char *cpuid_7_0_ecx_feature_name[] = {
NULL, NULL, NULL, "pku",
"ospke", NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
};
static const char *cpuid_apm_edx_feature_name[] = {
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
@ -352,6 +363,7 @@ static const char *cpuid_6_feature_name[] = {
CPUID_7_0_EBX_FSGSBASE, CPUID_7_0_EBX_HLE, CPUID_7_0_EBX_AVX2,
CPUID_7_0_EBX_ERMS, CPUID_7_0_EBX_INVPCID, CPUID_7_0_EBX_RTM,
CPUID_7_0_EBX_RDSEED */
#define TCG_7_0_ECX_FEATURES 0
#define TCG_APM_FEATURES 0
#define TCG_6_EAX_FEATURES CPUID_6_EAX_ARAT
@ -409,6 +421,13 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
.cpuid_reg = R_EBX,
.tcg_features = TCG_7_0_EBX_FEATURES,
},
[FEAT_7_0_ECX] = {
.feat_names = cpuid_7_0_ecx_feature_name,
.cpuid_eax = 7,
.cpuid_needs_ecx = true, .cpuid_ecx = 0,
.cpuid_reg = R_ECX,
.tcg_features = TCG_7_0_ECX_FEATURES,
},
[FEAT_8000_0007_EDX] = {
.feat_names = cpuid_apm_edx_feature_name,
.cpuid_eax = 0x80000007,
@ -469,6 +488,8 @@ static const ExtSaveArea ext_save_areas[] = {
.offset = 0x480, .size = 0x200 },
[7] = { .feature = FEAT_7_0_EBX, .bits = CPUID_7_0_EBX_AVX512F,
.offset = 0x680, .size = 0x400 },
[9] = { .feature = FEAT_7_0_ECX, .bits = CPUID_7_0_ECX_PKU,
.offset = 0xA80, .size = 0x8 },
};
const char *get_register_name_32(unsigned int reg)
@ -2390,7 +2411,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
if (count == 0) {
*eax = 0; /* Maximum ECX value for sub-leaves */
*ebx = env->features[FEAT_7_0_EBX]; /* Feature flags */
*ecx = 0; /* Reserved */
*ecx = env->features[FEAT_7_0_ECX]; /* Feature flags */
*edx = 0; /* Reserved */
} else {
*eax = 0;

7
target-i386/cpu.h
View File

@ -407,6 +407,7 @@
#define XSTATE_OPMASK (1ULL << 5)
#define XSTATE_ZMM_Hi256 (1ULL << 6)
#define XSTATE_Hi16_ZMM (1ULL << 7)
#define XSTATE_PKRU (1ULL << 9)
/* CPUID feature words */
@ -414,6 +415,7 @@ typedef enum FeatureWord {
FEAT_1_EDX, /* CPUID[1].EDX */
FEAT_1_ECX, /* CPUID[1].ECX */
FEAT_7_0_EBX, /* CPUID[EAX=7,ECX=0].EBX */
FEAT_7_0_ECX, /* CPUID[EAX=7,ECX=0].ECX */
FEAT_8000_0001_EDX, /* CPUID[8000_0001].EDX */
FEAT_8000_0001_ECX, /* CPUID[8000_0001].ECX */
FEAT_8000_0007_EDX, /* CPUID[8000_0007].EDX */
@ -585,6 +587,9 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
#define CPUID_7_0_EBX_AVX512ER (1U << 27) /* AVX-512 Exponential and Reciprocal */
#define CPUID_7_0_EBX_AVX512CD (1U << 28) /* AVX-512 Conflict Detection */
#define CPUID_7_0_ECX_PKU (1U << 3)
#define CPUID_7_0_ECX_OSPKE (1U << 4)
#define CPUID_XSAVE_XSAVEOPT (1U << 0)
#define CPUID_XSAVE_XSAVEC (1U << 1)
#define CPUID_XSAVE_XGETBV1 (1U << 2)
@ -996,6 +1001,8 @@ typedef struct CPUX86State {
uint64_t xcr0;
uint64_t xss;
uint32_t pkru;
TPRAccess tpr_access_type;
} CPUX86State;

3
target-i386/kvm.c
View File

@ -1299,6 +1299,7 @@ static int kvm_put_fpu(X86CPU *cpu)
#define XSAVE_OPMASK 272
#define XSAVE_ZMM_Hi256 288
#define XSAVE_Hi16_ZMM 416
#define XSAVE_PKRU 672
static int kvm_put_xsave(X86CPU *cpu)
{
@ -1352,6 +1353,7 @@ static int kvm_put_xsave(X86CPU *cpu)
#ifdef TARGET_X86_64
memcpy(&xsave->region[XSAVE_Hi16_ZMM], &env->xmm_regs[16],
16 * sizeof env->xmm_regs[16]);
memcpy(&xsave->region[XSAVE_PKRU], &env->pkru, sizeof env->pkru);
#endif
r = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_XSAVE, xsave);
return r;
@ -1770,6 +1772,7 @@ static int kvm_get_xsave(X86CPU *cpu)
#ifdef TARGET_X86_64
memcpy(&env->xmm_regs[16], &xsave->region[XSAVE_Hi16_ZMM],
16 * sizeof env->xmm_regs[16]);
memcpy(&env->pkru, &xsave->region[XSAVE_PKRU], sizeof env->pkru);
#endif
return 0;
}

24
target-i386/machine.c
View File

@ -848,6 +848,27 @@ static const VMStateDescription vmstate_xss = {
}
};
#ifdef TARGET_X86_64
static bool pkru_needed(void *opaque)
{
X86CPU *cpu = opaque;
CPUX86State *env = &cpu->env;
return env->pkru != 0;
}
static const VMStateDescription vmstate_pkru = {
.name = "cpu/pkru",
.version_id = 1,
.minimum_version_id = 1,
.needed = pkru_needed,
.fields = (VMStateField[]){
VMSTATE_UINT32(env.pkru, X86CPU),
VMSTATE_END_OF_LIST()
}
};
#endif
static bool tsc_khz_needed(void *opaque)
{
X86CPU *cpu = opaque;
@ -991,6 +1012,9 @@ VMStateDescription vmstate_x86_cpu = {
&vmstate_avx512,
&vmstate_xss,
&vmstate_tsc_khz,
#ifdef TARGET_X86_64
&vmstate_pkru,
#endif
NULL
}
};