On Mon, Jun 17, 2024 at 02:04:30PM -0700, Sean Christopherson wrote:
> 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 <bp@xxxxxxxxx>
> Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
> ---
> 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 9ac6fca50cf3..0a36c82b316f 100644
> --- a/arch/x86/kvm/svm/svm.c
> +++ b/arch/x86/kvm/svm/svm.c
> @@ -1504,7 +1504,7 @@ 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;
> }
> --
Tested-by: Borislav Petkov (AMD) <bp@xxxxxxxxx>
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
