@@ -1038,13 +1038,25 @@ static int hv_cpuid_check_and_set(CPUState *cs, struct kvm_cpuid2 *cpuid,
return 1;
}
-static int hyperv_handle_properties(CPUState *cs)
+/*
+ * Fill in Hyper-V CPUIDs. Returns the number of entries filled in cpuid_ent in
+ * case of success, errno < 0 in case of failure and 0 when no Hyper-V
+ * extentions are enabled.
+ */
+static int hyperv_handle_properties(CPUState *cs,
+ struct kvm_cpuid_entry2 *cpuid_ent)
{
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
struct kvm_cpuid2 *cpuid;
+ struct kvm_cpuid_entry2 *c;
+ uint32_t signature[3];
+ uint32_t cpuid_i = 0;
int r = 0;
+ if (!hyperv_enabled(cpu))
+ return 0;
+
if (cpu->hyperv_evmcs) {
uint16_t evmcs_version;
@@ -1095,9 +1107,80 @@ static int hyperv_handle_properties(CPUState *cs)
/* Not exposed by KVM but needed to make CPU hotplug in Windows work */
env->features[FEAT_HYPERV_EDX] |= HV_CPU_DYNAMIC_PARTITIONING_AVAILABLE;
+ if (r) {
+ r = -ENOSYS;
+ goto free;
+ }
+
+ c = &cpuid_ent[cpuid_i++];
+ c->function = HV_CPUID_VENDOR_AND_MAX_FUNCTIONS;
+ if (!cpu->hyperv_vendor_id) {
+ memcpy(signature, "Microsoft Hv", 12);
+ } else {
+ size_t len = strlen(cpu->hyperv_vendor_id);
+
+ if (len > 12) {
+ error_report("hv-vendor-id truncated to 12 characters");
+ len = 12;
+ }
+ memset(signature, 0, 12);
+ memcpy(signature, cpu->hyperv_vendor_id, len);
+ }
+ c->eax = cpu->hyperv_evmcs ?
+ HV_CPUID_NESTED_FEATURES : HV_CPUID_IMPLEMENT_LIMITS;
+ c->ebx = signature[0];
+ c->ecx = signature[1];
+ c->edx = signature[2];
+
+ c = &cpuid_ent[cpuid_i++];
+ c->function = HV_CPUID_INTERFACE;
+ memcpy(signature, "Hv#1\0\0\0\0\0\0\0\0", 12);
+ c->eax = signature[0];
+ c->ebx = 0;
+ c->ecx = 0;
+ c->edx = 0;
+
+ c = &cpuid_ent[cpuid_i++];
+ c->function = HV_CPUID_VERSION;
+ c->eax = 0x00001bbc;
+ c->ebx = 0x00060001;
+
+ c = &cpuid_ent[cpuid_i++];
+ c->function = HV_CPUID_FEATURES;
+ c->eax = env->features[FEAT_HYPERV_EAX];
+ c->ebx = env->features[FEAT_HYPERV_EBX];
+ c->edx = env->features[FEAT_HYPERV_EDX];
+
+ c = &cpuid_ent[cpuid_i++];
+ c->function = HV_CPUID_ENLIGHTMENT_INFO;
+ c->eax = env->features[FEAT_HV_RECOMM_EAX];
+ c->ebx = cpu->hyperv_spinlock_attempts;
+
+ c = &cpuid_ent[cpuid_i++];
+ c->function = HV_CPUID_IMPLEMENT_LIMITS;
+ c->eax = cpu->hv_max_vps;
+ c->ebx = 0x40;
+
+ if (cpu->hyperv_evmcs) {
+ __u32 function;
+
+ /* Create zeroed 0x40000006..0x40000009 leaves */
+ for (function = HV_CPUID_IMPLEMENT_LIMITS + 1;
+ function < HV_CPUID_NESTED_FEATURES; function++) {
+ c = &cpuid_ent[cpuid_i++];
+ c->function = function;
+ }
+
+ c = &cpuid_ent[cpuid_i++];
+ c->function = HV_CPUID_NESTED_FEATURES;
+ c->eax = env->features[FEAT_HV_NESTED_EAX];
+ }
+ r = cpuid_i;
+
+free:
g_free(cpuid);
- return r ? -ENOSYS : 0;
+ return r;
}
static int hyperv_init_vcpu(X86CPU *cpu)
@@ -1206,79 +1289,13 @@ int kvm_arch_init_vcpu(CPUState *cs)
}
/* Paravirtualization CPUIDs */
- if (hyperv_enabled(cpu)) {
- c = &cpuid_data.entries[cpuid_i++];
- c->function = HV_CPUID_VENDOR_AND_MAX_FUNCTIONS;
- if (!cpu->hyperv_vendor_id) {
- memcpy(signature, "Microsoft Hv", 12);
- } else {
- size_t len = strlen(cpu->hyperv_vendor_id);
-
- if (len > 12) {
- error_report("hv-vendor-id truncated to 12 characters");
- len = 12;
- }
- memset(signature, 0, 12);
- memcpy(signature, cpu->hyperv_vendor_id, len);
- }
- c->eax = cpu->hyperv_evmcs ?
- HV_CPUID_NESTED_FEATURES : HV_CPUID_IMPLEMENT_LIMITS;
- c->ebx = signature[0];
- c->ecx = signature[1];
- c->edx = signature[2];
-
- c = &cpuid_data.entries[cpuid_i++];
- c->function = HV_CPUID_INTERFACE;
- memcpy(signature, "Hv#1\0\0\0\0\0\0\0\0", 12);
- c->eax = signature[0];
- c->ebx = 0;
- c->ecx = 0;
- c->edx = 0;
-
- c = &cpuid_data.entries[cpuid_i++];
- c->function = HV_CPUID_VERSION;
- c->eax = 0x00001bbc;
- c->ebx = 0x00060001;
-
- c = &cpuid_data.entries[cpuid_i++];
- c->function = HV_CPUID_FEATURES;
- r = hyperv_handle_properties(cs);
- if (r) {
- return r;
- }
- c->eax = env->features[FEAT_HYPERV_EAX];
- c->ebx = env->features[FEAT_HYPERV_EBX];
- c->edx = env->features[FEAT_HYPERV_EDX];
-
- c = &cpuid_data.entries[cpuid_i++];
- c->function = HV_CPUID_ENLIGHTMENT_INFO;
-
- c->eax = env->features[FEAT_HV_RECOMM_EAX];
- c->ebx = cpu->hyperv_spinlock_attempts;
-
- c = &cpuid_data.entries[cpuid_i++];
- c->function = HV_CPUID_IMPLEMENT_LIMITS;
-
- c->eax = cpu->hv_max_vps;
- c->ebx = 0x40;
-
+ r = hyperv_handle_properties(cs, cpuid_data.entries);
+ if (r < 0) {
+ return r;
+ } else if (r > 0) {
+ cpuid_i = r;
kvm_base = KVM_CPUID_SIGNATURE_NEXT;
has_msr_hv_hypercall = true;
-
- if (cpu->hyperv_evmcs) {
- __u32 function;
-
- /* Create zeroed 0x40000006..0x40000009 leaves */
- for (function = HV_CPUID_IMPLEMENT_LIMITS + 1;
- function < HV_CPUID_NESTED_FEATURES; function++) {
- c = &cpuid_data.entries[cpuid_i++];
- c->function = function;
- }
-
- c = &cpuid_data.entries[cpuid_i++];
- c->function = HV_CPUID_NESTED_FEATURES;
- c->eax = env->features[FEAT_HV_NESTED_EAX];
- }
}
if (cpu->expose_kvm) {
Let's consolidate Hyper-V features handling in hyperv_handle_properties(). The change is necessary to support pass-through 'hv-all' mode as we'll be just copying CPUIDs from KVM instead of filling them in. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> --- target/i386/kvm.c | 163 +++++++++++++++++++++++++--------------------- 1 file changed, 90 insertions(+), 73 deletions(-)