On Tue, Jul 05, 2022 at 01:56:00PM +0000, Kalra, Ashish wrote: > This function is required to ensure that IOMMU supports the SEV-SNP > feature before enabling the SNP feature and calling SNP_INIT. > This IOMMU support check is done in the AMD IOMMU driver with the > iommu_sev_snp_supported() function so it is exported by the IOMMU > driver and called by sev module What sev module? The call to iommu_sev_snp_supported() is done by snp_rmptable_init() which is in arch/x86/kernel/sev.c. AFAICT. And that is not a module. But function exports are done for modules. So that export looks superfluous. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette