Commit 7774c8f3 authored by Sean Christopherson's avatar Sean Christopherson
Browse files

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: default avatarTom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20240223204233.3337324-3-seanjc@google.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent 19597a71

arch/x86/kvm/svm/vmenter.S

+2 −0
Original line number Diff line number Diff line
@@ -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 */