Commit ede146c2 authored by Paolo Bonzini's avatar Paolo Bonzini
Browse files

target/i386: expand feature words to 64 bits



VMX requires 64-bit feature words for the IA32_VMX_EPT_VPID_CAP
and IA32_VMX_BASIC MSRs.  (The VMX control MSRs are 64-bit wide but
actually have only 32 bits of information).

Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 99e24dbd
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+1 −1
Original line number Diff line number Diff line
@@ -462,7 +462,7 @@ int kvm_vm_check_extension(KVMState *s, unsigned int extension);

uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
                                      uint32_t index, int reg);
uint32_t kvm_arch_get_supported_msr_feature(KVMState *s, uint32_t index);
uint64_t kvm_arch_get_supported_msr_feature(KVMState *s, uint32_t index);


void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len);
+37 −34
Original line number Diff line number Diff line
@@ -789,7 +789,7 @@ typedef struct FeatureWordInfo {
     * In cases of disagreement between feature naming conventions,
     * aliases may be added.
     */
    const char *feat_names[32];
    const char *feat_names[64];
    union {
        /* If type==CPUID_FEATURE_WORD */
        struct {
@@ -803,11 +803,11 @@ typedef struct FeatureWordInfo {
            uint32_t index;
        } msr;
    };
    uint32_t tcg_features; /* Feature flags supported by TCG */
    uint32_t unmigratable_flags; /* Feature flags known to be unmigratable */
    uint32_t migratable_flags; /* Feature flags known to be migratable */
    uint64_t tcg_features; /* Feature flags supported by TCG */
    uint64_t unmigratable_flags; /* Feature flags known to be unmigratable */
    uint64_t migratable_flags; /* Feature flags known to be migratable */
    /* Features that shouldn't be auto-enabled by "-cpu host" */
    uint32_t no_autoenable_flags;
    uint64_t no_autoenable_flags;
} FeatureWordInfo;

static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
@@ -1236,7 +1236,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {

typedef struct FeatureMask {
    FeatureWord index;
    uint32_t mask;
    uint64_t mask;
} FeatureMask;

typedef struct FeatureDep {
@@ -1246,11 +1246,11 @@ typedef struct FeatureDep {
static FeatureDep feature_dependencies[] = {
    {
        .from = { FEAT_7_0_EDX,             CPUID_7_0_EDX_ARCH_CAPABILITIES },
        .to = { FEAT_ARCH_CAPABILITIES,     ~0u },
        .to = { FEAT_ARCH_CAPABILITIES,     ~0ull },
    },
    {
        .from = { FEAT_7_0_EDX,             CPUID_7_0_EDX_CORE_CAPABILITY },
        .to = { FEAT_CORE_CAPABILITY,       ~0u },
        .to = { FEAT_CORE_CAPABILITY,       ~0ull },
    },
};

@@ -1362,14 +1362,14 @@ const char *get_register_name_32(unsigned int reg)
 * Returns the set of feature flags that are supported and migratable by
 * QEMU, for a given FeatureWord.
 */
static uint32_t x86_cpu_get_migratable_flags(FeatureWord w)
static uint64_t x86_cpu_get_migratable_flags(FeatureWord w)
{
    FeatureWordInfo *wi = &feature_word_info[w];
    uint32_t r = 0;
    uint64_t r = 0;
    int i;

    for (i = 0; i < 32; i++) {
        uint32_t f = 1U << i;
    for (i = 0; i < 64; i++) {
        uint64_t f = 1ULL << i;

        /* If the feature name is known, it is implicitly considered migratable,
         * unless it is explicitly set in unmigratable_flags */
@@ -2931,7 +2931,7 @@ void x86_cpu_change_kvm_default(const char *prop, const char *value)
    assert(pv->prop);
}

static uint32_t x86_cpu_get_supported_feature_word(FeatureWord w,
static uint64_t x86_cpu_get_supported_feature_word(FeatureWord w,
                                                   bool migratable_only);

static bool lmce_supported(void)
@@ -3117,7 +3117,7 @@ static bool x86_cpu_have_filtered_features(X86CPU *cpu)
    return false;
}

static void mark_unavailable_features(X86CPU *cpu, FeatureWord w, uint32_t mask,
static void mark_unavailable_features(X86CPU *cpu, FeatureWord w, uint64_t mask,
                                      const char *verbose_prefix)
{
    CPUX86State *env = &cpu->env;
@@ -3134,8 +3134,8 @@ static void mark_unavailable_features(X86CPU *cpu, FeatureWord w, uint32_t mask,
        return;
    }

    for (i = 0; i < 32; ++i) {
        if ((1UL << i) & mask) {
    for (i = 0; i < 64; ++i) {
        if ((1ULL << i) & mask) {
            feat_word_str = feature_word_description(f, i);
            warn_report("%s: %s%s%s [bit %d]",
                        verbose_prefix,
@@ -3378,7 +3378,7 @@ static void x86_cpu_get_feature_words(Object *obj, Visitor *v,
                                      const char *name, void *opaque,
                                      Error **errp)
{
    uint32_t *array = (uint32_t *)opaque;
    uint64_t *array = (uint64_t *)opaque;
    FeatureWord w;
    X86CPUFeatureWordInfo word_infos[FEATURE_WORDS] = { };
    X86CPUFeatureWordInfoList list_entries[FEATURE_WORDS] = { };
@@ -3422,6 +3422,7 @@ static inline void feat2prop(char *s)
/* Return the feature property name for a feature flag bit */
static const char *x86_cpu_feature_name(FeatureWord w, int bitnr)
{
    const char *name;
    /* XSAVE components are automatically enabled by other features,
     * so return the original feature name instead
     */
@@ -3435,9 +3436,11 @@ static const char *x86_cpu_feature_name(FeatureWord w, int bitnr)
        }
    }

    assert(bitnr < 32);
    assert(bitnr < 64);
    assert(w < FEATURE_WORDS);
    return feature_word_info[w].feat_names[bitnr];
    name = feature_word_info[w].feat_names[bitnr];
    assert(bitnr < 32 || !(name && feature_word_info[w].type == CPUID_FEATURE_WORD));
    return name;
}

/* Compatibily hack to maintain legacy +-feat semantic,
@@ -3553,10 +3556,10 @@ static void x86_cpu_list_feature_names(FeatureWordArray features,
    strList **next = feat_names;

    for (w = 0; w < FEATURE_WORDS; w++) {
        uint32_t filtered = features[w];
        uint64_t filtered = features[w];
        int i;
        for (i = 0; i < 32; i++) {
            if (filtered & (1UL << i)) {
        for (i = 0; i < 64; i++) {
            if (filtered & (1ULL << i)) {
                strList *new = g_new0(strList, 1);
                new->value = g_strdup(x86_cpu_feature_name(w, i));
                *next = new;
@@ -3725,7 +3728,7 @@ void x86_cpu_list(void)
    names = NULL;
    for (i = 0; i < ARRAY_SIZE(feature_word_info); i++) {
        FeatureWordInfo *fw = &feature_word_info[i];
        for (j = 0; j < 32; j++) {
        for (j = 0; j < 64; j++) {
            if (fw->feat_names[j]) {
                names = g_list_append(names, (gpointer)fw->feat_names[j]);
            }
@@ -3780,11 +3783,11 @@ CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
    return cpu_list;
}

static uint32_t x86_cpu_get_supported_feature_word(FeatureWord w,
static uint64_t x86_cpu_get_supported_feature_word(FeatureWord w,
                                                   bool migratable_only)
{
    FeatureWordInfo *wi = &feature_word_info[w];
    uint32_t r = 0;
    uint64_t r = 0;

    if (kvm_enabled()) {
        switch (wi->type) {
@@ -3955,7 +3958,7 @@ static QDict *x86_cpu_static_props(void)
    for (w = 0; w < FEATURE_WORDS; w++) {
        FeatureWordInfo *fi = &feature_word_info[w];
        int bit;
        for (bit = 0; bit < 32; bit++) {
        for (bit = 0; bit < 64; bit++) {
            if (!fi->feat_names[bit]) {
                continue;
            }
@@ -5111,7 +5114,7 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **errp)
    for (i = 0; i < ARRAY_SIZE(feature_dependencies); i++) {
        FeatureDep *d = &feature_dependencies[i];
        if (!(env->features[d->from.index] & d->from.mask)) {
            uint32_t unavailable_features = env->features[d->to.index] & d->to.mask;
            uint64_t unavailable_features = env->features[d->to.index] & d->to.mask;

            /* Not an error unless the dependent feature was added explicitly.  */
            mark_unavailable_features(cpu, d->to.index,
@@ -5206,10 +5209,10 @@ static void x86_cpu_filter_features(X86CPU *cpu, bool verbose)
    }

    for (w = 0; w < FEATURE_WORDS; w++) {
        uint32_t host_feat =
        uint64_t host_feat =
            x86_cpu_get_supported_feature_word(w, false);
        uint32_t requested_features = env->features[w];
        uint32_t unavailable_features = requested_features & ~host_feat;
        uint64_t requested_features = env->features[w];
        uint64_t unavailable_features = requested_features & ~host_feat;
        mark_unavailable_features(cpu, w, unavailable_features, prefix);
    }

@@ -5506,7 +5509,7 @@ static void x86_cpu_unrealizefn(DeviceState *dev, Error **errp)

typedef struct BitProperty {
    FeatureWord w;
    uint32_t mask;
    uint64_t mask;
} BitProperty;

static void x86_cpu_get_bit_prop(Object *obj, Visitor *v, const char *name,
@@ -5514,7 +5517,7 @@ static void x86_cpu_get_bit_prop(Object *obj, Visitor *v, const char *name,
{
    X86CPU *cpu = X86_CPU(obj);
    BitProperty *fp = opaque;
    uint32_t f = cpu->env.features[fp->w];
    uint64_t f = cpu->env.features[fp->w];
    bool value = (f & fp->mask) == fp->mask;
    visit_type_bool(v, name, &value, errp);
}
@@ -5567,7 +5570,7 @@ static void x86_cpu_register_bit_prop(X86CPU *cpu,
{
    BitProperty *fp;
    ObjectProperty *op;
    uint32_t mask = (1UL << bitnr);
    uint64_t mask = (1ULL << bitnr);

    op = object_property_find(OBJECT(cpu), prop_name, NULL);
    if (op) {
@@ -5701,7 +5704,7 @@ static void x86_cpu_initfn(Object *obj)
    for (w = 0; w < FEATURE_WORDS; w++) {
        int bitnr;

        for (bitnr = 0; bitnr < 32; bitnr++) {
        for (bitnr = 0; bitnr < 64; bitnr++) {
            x86_cpu_register_feature_bit_props(cpu, w, bitnr);
        }
    }
+1 −1
Original line number Diff line number Diff line
@@ -502,7 +502,7 @@ typedef enum FeatureWord {
    FEATURE_WORDS,
} FeatureWord;

typedef uint32_t FeatureWordArray[FEATURE_WORDS];
typedef uint64_t FeatureWordArray[FEATURE_WORDS];

/* cpuid_features bits */
#define CPUID_FP87 (1U << 0)
+1 −1
Original line number Diff line number Diff line
@@ -442,7 +442,7 @@ uint32_t kvm_arch_get_supported_cpuid(KVMState *s, uint32_t function,
    return ret;
}

uint32_t kvm_arch_get_supported_msr_feature(KVMState *s, uint32_t index)
uint64_t kvm_arch_get_supported_msr_feature(KVMState *s, uint32_t index)
{
    struct {
        struct kvm_msrs info;