[PATCH] target/i386: merge host_cpu_instance_init() and host_cpu_max_instance_init()

[Paolo Bonzini]

Simplify the accelerators' cpu_instance_init callbacks by doing all
host-cpu setup in a single function.

Based-on: <20250711000603.438312-1-pbonz...@redhat.com>
Cc: Xiaoyao Li <xiaoyao...@intel.com>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
 target/i386/host-cpu.c    | 28 ++++++++++++++--------------
 target/i386/hvf/hvf-cpu.c |  2 --
 target/i386/kvm/kvm-cpu.c |  2 --
 3 files changed, 14 insertions(+), 18 deletions(-)

diff --git a/target/i386/host-cpu.c b/target/i386/host-cpu.c
index 7512567298b..3399edc1ad0 100644
--- a/target/i386/host-cpu.c
+++ b/target/i386/host-cpu.c
@@ -132,27 +132,27 @@ void host_cpu_instance_init(X86CPU *cpu)
 {
     X86CPUClass *xcc = X86_CPU_GET_CLASS(cpu);
 
-    if (xcc->model) {
-        char vendor[CPUID_VENDOR_SZ + 1];
-
-        host_cpu_vendor_fms(vendor, NULL, NULL, NULL);
-        object_property_set_str(OBJECT(cpu), "vendor", vendor, &error_abort);
-    }
-}
-
-void host_cpu_max_instance_init(X86CPU *cpu)
-{
     char vendor[CPUID_VENDOR_SZ + 1] = { 0 };
     char model_id[CPUID_MODEL_ID_SZ + 1] = { 0 };
     int family, model, stepping;
 
+    /*
+     * setting vendor applies to both max/host and builtin_x86_defs CPU.
+     * FIXME: this probably should warn or should be skipped if vendors do
+     * not match, because family numbers are incompatible between Intel and 
AMD.
+     */
+    host_cpu_vendor_fms(vendor, &family, &model, &stepping);
+    object_property_set_str(OBJECT(cpu), "vendor", vendor, &error_abort);
+
+    if (!xcc->max_features) {
+        return;
+    }
+
+    host_cpu_fill_model_id(model_id);
+
     /* Use max host physical address bits if -cpu max option is applied */
     object_property_set_bool(OBJECT(cpu), "host-phys-bits", true, 
&error_abort);
 
-    host_cpu_vendor_fms(vendor, &family, &model, &stepping);
-    host_cpu_fill_model_id(model_id);
-
-    object_property_set_str(OBJECT(cpu), "vendor", vendor, &error_abort);
     object_property_set_int(OBJECT(cpu), "family", family, &error_abort);
     object_property_set_int(OBJECT(cpu), "model", model, &error_abort);
     object_property_set_int(OBJECT(cpu), "stepping", stepping,
diff --git a/target/i386/hvf/hvf-cpu.c b/target/i386/hvf/hvf-cpu.c
index 2b991f2fc8e..94ee096ecf7 100644
--- a/target/i386/hvf/hvf-cpu.c
+++ b/target/i386/hvf/hvf-cpu.c
@@ -21,8 +21,6 @@ static void hvf_cpu_max_instance_init(X86CPU *cpu)
 {
     CPUX86State *env = &cpu->env;
 
-    host_cpu_max_instance_init(cpu);
-
     env->cpuid_min_level =
         hvf_get_supported_cpuid(0x0, 0, R_EAX);
     env->cpuid_min_xlevel =
diff --git a/target/i386/kvm/kvm-cpu.c b/target/i386/kvm/kvm-cpu.c
index 6fed353548e..a99b8764644 100644
--- a/target/i386/kvm/kvm-cpu.c
+++ b/target/i386/kvm/kvm-cpu.c
@@ -109,8 +109,6 @@ static void kvm_cpu_max_instance_init(X86CPU *cpu)
     CPUX86State *env = &cpu->env;
     KVMState *s = kvm_state;
 
-    host_cpu_max_instance_init(cpu);
-
     object_property_set_bool(OBJECT(cpu), "pmu", true, &error_abort);
 
     if (lmce_supported()) {
-- 
2.50.0