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    SubjectRe: [PATCH Part2 v6 02/49] iommu/amd: Introduce function to check SEV-SNP support
    On Mon, Jun 20, 2022 at 10:59:19PM +0000, Ashish Kalra wrote:
    > +bool iommu_sev_snp_supported(void)
    > +{
    > + struct amd_iommu *iommu;
    > +
    > + /*
    > + * The SEV-SNP support requires that IOMMU must be enabled, and is
    > + * not configured in the passthrough mode.
    > + */
    > + if (no_iommu || iommu_default_passthrough()) {
    > + pr_err("SEV-SNP: IOMMU is either disabled or configured in passthrough mode.\n");
    > + return false;
    > + }
    > +
    > + /*
    > + * Iterate through all the IOMMUs and verify the SNPSup feature is
    > + * enabled.
    > + */
    > + for_each_iommu(iommu) {
    > + if (!iommu_feature(iommu, FEATURE_SNP)) {
    > + pr_err("SNPSup is disabled (devid: %02x:%02x.%x)\n",
    > + PCI_BUS_NUM(iommu->devid), PCI_SLOT(iommu->devid),
    > + PCI_FUNC(iommu->devid));
    > + return false;
    > + }
    > + }
    > +
    > + return true;
    > +}
    > +EXPORT_SYMBOL_GPL(iommu_sev_snp_supported);

    Why is this function exported?

    --
    Regards/Gruss,
    Boris.

    https://people.kernel.org/tglx/notes-about-netiquette

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