From 34830b3c02aec1fe6eaac7b178a05c25620a25b0 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Mon, 17 Jun 2024 14:04:30 -0700 Subject: [PATCH] KVM: SVM: Force sev_es_host_save_area() to be inlined (for noinstr usage) Force sev_es_host_save_area() to be always inlined, as it's used in the low level VM-Enter/VM-Exit path, which is non-instrumentable. vmlinux.o: warning: objtool: svm_vcpu_enter_exit+0xb0: call to sev_es_host_save_area() leaves .noinstr.text section vmlinux.o: warning: objtool: svm_vcpu_enter_exit+0xbf: call to sev_es_host_save_area.isra.0() leaves .noinstr.text section Fixes: c92be2fd8edf ("KVM: SVM: Save/restore non-volatile GPRs in SEV-ES VMRUN via host save area") Reported-by: Borislav Petkov Tested-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/20240617210432.1642542-2-seanjc@google.com Signed-off-by: Sean Christopherson --- arch/x86/kvm/svm/svm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index da5cddec97a6..33728ce4d44b 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -1495,7 +1495,7 @@ static void svm_vcpu_free(struct kvm_vcpu *vcpu) __free_pages(virt_to_page(svm->msrpm), get_order(MSRPM_SIZE)); } -static struct sev_es_save_area *sev_es_host_save_area(struct svm_cpu_data *sd) +static __always_inline struct sev_es_save_area *sev_es_host_save_area(struct svm_cpu_data *sd) { return page_address(sd->save_area) + 0x400; } -- 2.25.1