On Wed, Jun 22, 2022 at 12:11:31PM -0500, Suravee Suthikulpanit wrote:
> bool amd_iommu_v2_supported(void)
> {
> - return amd_iommu_v2_present;
> + /*
> + * Since DTE[Mode]=0 is prohibited on SNP-enabled system
> + * (i.e. EFR[SNPSup]=1), IOMMUv2 page table cannot be used without
> + * setting up IOMMUv1 page table.
> + */
> + return amd_iommu_v2_present && !amd_iommu_snp_en;
IOMMU_v2 APIs could actually be supported with GIOV and IOMMUv2
page-tables in-use, no?
Regards,
Joerg
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