i386: stop using env->features[] for filling Hyper-V CPUIDs
As a preparatory patch to dropping Hyper-V CPUID leaves from feature_word_info[] stop using env->features[] as a temporary storage of Hyper-V CPUIDs, just build Hyper-V CPUID leaves directly from kvm_hyperv_properties[] data. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20210422161130.652779-5-vkuznets@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
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@ -1699,6 +1699,7 @@ struct X86CPU {
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uint32_t hyperv_interface_id[4];
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uint32_t hyperv_version_id[4];
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uint32_t hyperv_limits[3];
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uint32_t hyperv_nested[4];
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bool check_cpuid;
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bool enforce_cpuid;
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@ -1112,7 +1112,6 @@ static int hv_cpuid_check_and_set(CPUState *cs, struct kvm_cpuid2 *cpuid,
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int feature)
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{
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X86CPU *cpu = X86_CPU(cs);
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CPUX86State *env = &cpu->env;
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uint32_t r, fw, bits;
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uint64_t deps;
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int i, dep_feat;
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@ -1152,8 +1151,6 @@ static int hv_cpuid_check_and_set(CPUState *cs, struct kvm_cpuid2 *cpuid,
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return 0;
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}
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}
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env->features[fw] |= bits;
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}
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if (cpu->hyperv_passthrough) {
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@ -1163,6 +1160,29 @@ static int hv_cpuid_check_and_set(CPUState *cs, struct kvm_cpuid2 *cpuid,
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return 0;
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}
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static uint32_t hv_build_cpuid_leaf(CPUState *cs, uint32_t fw)
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{
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X86CPU *cpu = X86_CPU(cs);
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uint32_t r = 0;
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int i, j;
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for (i = 0; i < ARRAY_SIZE(kvm_hyperv_properties); i++) {
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if (!hyperv_feat_enabled(cpu, i)) {
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continue;
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}
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for (j = 0; j < ARRAY_SIZE(kvm_hyperv_properties[i].flags); j++) {
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if (kvm_hyperv_properties[i].flags[j].fw != fw) {
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continue;
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}
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r |= kvm_hyperv_properties[i].flags[j].bits;
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}
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}
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return r;
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}
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/*
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* Fill in Hyper-V CPUIDs. Returns the number of entries filled in cpuid_ent in
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* case of success, errno < 0 in case of failure and 0 when no Hyper-V
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@ -1172,9 +1192,8 @@ static int hyperv_handle_properties(CPUState *cs,
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struct kvm_cpuid_entry2 *cpuid_ent)
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{
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X86CPU *cpu = X86_CPU(cs);
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CPUX86State *env = &cpu->env;
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struct kvm_cpuid2 *cpuid;
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struct kvm_cpuid_entry2 *c;
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struct kvm_cpuid_entry2 *c, *c2;
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uint32_t cpuid_i = 0;
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int r;
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@ -1195,9 +1214,7 @@ static int hyperv_handle_properties(CPUState *cs,
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}
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if (!r) {
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env->features[FEAT_HV_RECOMM_EAX] |=
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HV_ENLIGHTENED_VMCS_RECOMMENDED;
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env->features[FEAT_HV_NESTED_EAX] = evmcs_version;
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cpu->hyperv_nested[0] = evmcs_version;
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}
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}
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@ -1236,13 +1253,6 @@ static int hyperv_handle_properties(CPUState *cs,
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cpu->hyperv_version_id[3] = c->edx;
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}
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c = cpuid_find_entry(cpuid, HV_CPUID_FEATURES, 0);
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if (c) {
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env->features[FEAT_HYPERV_EAX] = c->eax;
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env->features[FEAT_HYPERV_EBX] = c->ebx;
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env->features[FEAT_HYPERV_EDX] = c->edx;
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}
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c = cpuid_find_entry(cpuid, HV_CPUID_IMPLEMENT_LIMITS, 0);
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if (c) {
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cpu->hv_max_vps = c->eax;
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@ -1253,23 +1263,8 @@ static int hyperv_handle_properties(CPUState *cs,
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c = cpuid_find_entry(cpuid, HV_CPUID_ENLIGHTMENT_INFO, 0);
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if (c) {
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env->features[FEAT_HV_RECOMM_EAX] = c->eax;
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cpu->hyperv_spinlock_attempts = c->ebx;
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}
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c = cpuid_find_entry(cpuid, HV_CPUID_NESTED_FEATURES, 0);
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if (c) {
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env->features[FEAT_HV_NESTED_EAX] = c->eax;
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}
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}
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if (cpu->hyperv_no_nonarch_cs == ON_OFF_AUTO_ON) {
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env->features[FEAT_HV_RECOMM_EAX] |= HV_NO_NONARCH_CORESHARING;
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} else if (cpu->hyperv_no_nonarch_cs == ON_OFF_AUTO_AUTO) {
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c = cpuid_find_entry(cpuid, HV_CPUID_ENLIGHTMENT_INFO, 0);
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if (c) {
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env->features[FEAT_HV_RECOMM_EAX] |=
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c->eax & HV_NO_NONARCH_CORESHARING;
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}
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}
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/* Features */
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@ -1299,9 +1294,6 @@ static int hyperv_handle_properties(CPUState *cs,
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r |= 1;
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}
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/* Not exposed by KVM but needed to make CPU hotplug in Windows work */
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env->features[FEAT_HYPERV_EDX] |= HV_CPU_DYNAMIC_PARTITIONING_AVAILABLE;
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if (r) {
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r = -ENOSYS;
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goto free;
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@ -1331,15 +1323,27 @@ static int hyperv_handle_properties(CPUState *cs,
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c = &cpuid_ent[cpuid_i++];
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c->function = HV_CPUID_FEATURES;
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c->eax = env->features[FEAT_HYPERV_EAX];
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c->ebx = env->features[FEAT_HYPERV_EBX];
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c->edx = env->features[FEAT_HYPERV_EDX];
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c->eax = hv_build_cpuid_leaf(cs, FEAT_HYPERV_EAX);
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c->ebx = hv_build_cpuid_leaf(cs, FEAT_HYPERV_EBX);
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c->edx = hv_build_cpuid_leaf(cs, FEAT_HYPERV_EDX);
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/* Not exposed by KVM but needed to make CPU hotplug in Windows work */
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c->edx |= HV_CPU_DYNAMIC_PARTITIONING_AVAILABLE;
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c = &cpuid_ent[cpuid_i++];
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c->function = HV_CPUID_ENLIGHTMENT_INFO;
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c->eax = env->features[FEAT_HV_RECOMM_EAX];
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c->eax = hv_build_cpuid_leaf(cs, FEAT_HV_RECOMM_EAX);
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c->ebx = cpu->hyperv_spinlock_attempts;
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if (cpu->hyperv_no_nonarch_cs == ON_OFF_AUTO_ON) {
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c->eax |= HV_NO_NONARCH_CORESHARING;
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} else if (cpu->hyperv_no_nonarch_cs == ON_OFF_AUTO_AUTO) {
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c2 = cpuid_find_entry(cpuid, HV_CPUID_ENLIGHTMENT_INFO, 0);
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if (c2) {
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c->eax |= c2->eax & HV_NO_NONARCH_CORESHARING;
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}
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}
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c = &cpuid_ent[cpuid_i++];
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c->function = HV_CPUID_IMPLEMENT_LIMITS;
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c->eax = cpu->hv_max_vps;
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@ -1359,7 +1363,7 @@ static int hyperv_handle_properties(CPUState *cs,
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c = &cpuid_ent[cpuid_i++];
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c->function = HV_CPUID_NESTED_FEATURES;
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c->eax = env->features[FEAT_HV_NESTED_EAX];
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c->eax = cpu->hyperv_nested[0];
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}
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r = cpuid_i;
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