Current Intel SVM is designed by setting the pgd_t of the processor page table to FLPTR field of the PASID entry. The first level translation only supports 4 and 5 level paging structures, hence it's infeasible for the IOMMU to share a processor's page table when it's running in 32-bit mode. Let's disable 32bit support for now and claim support only when all the missing pieces are ready in the future.
Fixes: 1c4f88b7f1f92 ("iommu/vt-d: Shared virtual address in scalable mode") Suggested-by: Joerg Roedel <jroe...@suse.de> Signed-off-by: Lu Baolu <baolu...@linux.intel.com> --- drivers/iommu/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index aca76383f201..e6e0259c0a1c 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -211,7 +211,7 @@ config INTEL_IOMMU_DEBUGFS config INTEL_IOMMU_SVM bool "Support for Shared Virtual Memory with Intel IOMMU" - depends on INTEL_IOMMU && X86 + depends on INTEL_IOMMU && X86_64 select PCI_PASID select PCI_PRI select MMU_NOTIFIER -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu