From 12c5f0bbef0aed7da1b6afa1cd8303aef4f5caf1 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 18 Jul 2025 18:03:49 +0200 Subject: [PATCH 096/115] target/i386: allow reordering max_x86_cpu_initfn vs accel CPU init RH-Author: Paolo Bonzini RH-MergeRequest: 391: TDX support, including attestation and device assignment RH-Jira: RHEL-15710 RHEL-20798 RHEL-49728 RH-Acked-by: Yash Mankad RH-Acked-by: Peter Xu RH-Acked-by: David Hildenbrand RH-Commit: [96/115] 3cd04c30a233f88bf0e2747bf5d5ad2a06ffe056 (bonzini/rhel-qemu-kvm) The PMU feature is only supported by KVM, so move it there. And since all accelerators other than TCG overwrite the vendor, set it in max_x86_cpu_initfn only if it has not been initialized by the superclass. This makes it possible to run max_x86_cpu_initfn after accelerator init. Reviewed-by: Xiaoyao Li Reviewed-by: Zhao Liu Signed-off-by: Paolo Bonzini (cherry picked from commit 810fcc41fc572d90b3c05af3f06f451626ee6b10) Signed-off-by: Paolo Bonzini --- target/i386/cpu.c | 24 ++++++++++++------------ target/i386/kvm/kvm-cpu.c | 2 ++ 2 files changed, 14 insertions(+), 12 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 4df98838a3..dd2180fc3a 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -5880,21 +5880,21 @@ static void max_x86_cpu_class_init(ObjectClass *oc, void *data) static void max_x86_cpu_initfn(Object *obj) { X86CPU *cpu = X86_CPU(obj); - - /* We can't fill the features array here because we don't know yet if - * "migratable" is true or false. - */ - object_property_set_bool(OBJECT(cpu), "pmu", true, &error_abort); + CPUX86State *env = &cpu->env; /* - * these defaults are used for TCG and all other accelerators - * besides KVM and HVF, which overwrite these values + * these defaults are used for TCG, other accelerators overwrite these + * values */ - object_property_set_str(OBJECT(cpu), "vendor", CPUID_VENDOR_AMD, - &error_abort); - object_property_set_str(OBJECT(cpu), "model-id", - "QEMU TCG CPU version " QEMU_HW_VERSION, - &error_abort); + if (!env->cpuid_vendor1) { + object_property_set_str(OBJECT(cpu), "vendor", CPUID_VENDOR_AMD, + &error_abort); + } + if (!env->cpuid_model[0]) { + object_property_set_str(OBJECT(cpu), "model-id", + "QEMU TCG CPU version " QEMU_HW_VERSION, + &error_abort); + } } static const TypeInfo max_x86_cpu_type_info = { diff --git a/target/i386/kvm/kvm-cpu.c b/target/i386/kvm/kvm-cpu.c index 49e820b69e..660ccb70f8 100644 --- a/target/i386/kvm/kvm-cpu.c +++ b/target/i386/kvm/kvm-cpu.c @@ -111,6 +111,8 @@ static void kvm_cpu_max_instance_init(X86CPU *cpu) host_cpu_max_instance_init(cpu); + object_property_set_bool(OBJECT(cpu), "pmu", true, &error_abort); + if (lmce_supported()) { object_property_set_bool(OBJECT(cpu), "lmce", true, &error_abort); } -- 2.50.1