From: Sean Christopherson Date: Fri, 23 Feb 2024 20:42:27 +0000 (-0800) Subject: KVM: SVM: Wrap __svm_sev_es_vcpu_run() with #ifdef CONFIG_KVM_AMD_SEV X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7774c8f32e99b1f314c0df7c204a897792b4f378;p=linux.git KVM: SVM: Wrap __svm_sev_es_vcpu_run() with #ifdef CONFIG_KVM_AMD_SEV Compile (and link) __svm_sev_es_vcpu_run() if and only if SEV support is actually enabled. This will allow dropping non-existent 32-bit "support" from __svm_sev_es_vcpu_run() without causing undue confusion. Intentionally don't provide a stub (but keep the declaration), as any sane compiler, even with things like KASAN enabled, should eliminate the call to __svm_sev_es_vcpu_run() since sev_es_guest() unconditionally returns "false" if CONFIG_KVM_AMD_SEV=n. Reviewed-by: Tom Lendacky Link: https://lore.kernel.org/r/20240223204233.3337324-3-seanjc@google.com Signed-off-by: Sean Christopherson --- diff --git a/arch/x86/kvm/svm/vmenter.S b/arch/x86/kvm/svm/vmenter.S index 82637abf0b7ea..6f57d496867a1 100644 --- a/arch/x86/kvm/svm/vmenter.S +++ b/arch/x86/kvm/svm/vmenter.S @@ -291,6 +291,7 @@ SYM_FUNC_START(__svm_vcpu_run) SYM_FUNC_END(__svm_vcpu_run) +#ifdef CONFIG_KVM_AMD_SEV /** * __svm_sev_es_vcpu_run - Run a SEV-ES vCPU via a transition to SVM guest mode * @svm: struct vcpu_svm * @@ -389,3 +390,4 @@ SYM_FUNC_START(__svm_sev_es_vcpu_run) _ASM_EXTABLE(1b, 3b) SYM_FUNC_END(__svm_sev_es_vcpu_run) +#endif /* CONFIG_KVM_AMD_SEV */